diff --git "a/Art/Art__Modern_rock_Music_trend.json" "b/Art/Art__Modern_rock_Music_trend.json" new file mode 100644--- /dev/null +++ "b/Art/Art__Modern_rock_Music_trend.json" @@ -0,0 +1 @@ +{"nodes": [{"id": "0", "name": "snake rock"}, {"id": "1", "name": "rock star"}, {"id": "2", "name": "indie rock"}, {"id": "3", "name": "glam rock"}, {"id": "4", "name": "gregorian chant"}, {"id": "5", "name": "jesus christ superstar"}, {"id": "6", "name": "elvis presley"}, {"id": "7", "name": "nineteenth century"}, {"id": "8", "name": "christian rock"}, {"id": "9", "name": "compact disc"}, {"id": "10", "name": "african american"}, {"id": "11", "name": "south africa"}, {"id": "12", "name": "rock opera"}, {"id": "13", "name": "deep learning"}, {"id": "14", "name": "rock physics"}, {"id": "15", "name": "musical theatre"}, {"id": "16", "name": "bob dylan"}, {"id": "17", "name": "civil rights"}, {"id": "18", "name": "middle class"}, {"id": "19", "name": "music video"}, {"id": "20", "name": "garage rock"}, {"id": "21", "name": "social protest"}, {"id": "22", "name": "chamber music"}, {"id": "23", "name": "electronic dance music"}, {"id": "24", "name": "punk rock"}, {"id": "25", "name": "russian rock"}, {"id": "26", "name": "information technology"}, {"id": "27", "name": "pop rock"}, {"id": "28", "name": "high school"}, {"id": "29", "name": "rolling stone"}, {"id": "30", "name": "rock band"}, {"id": "31", "name": "post modernism"}, {"id": "32", "name": "higher education"}, {"id": "33", "name": "jesus christ"}, {"id": "34", "name": "mass media"}, {"id": "35", "name": "ancient greek"}, {"id": "36", "name": "music industry"}, {"id": "37", "name": "middle ages"}, {"id": "38", "name": "summary additional listening"}, {"id": "39", "name": "post war"}, {"id": "40", "name": "musical instruments"}, {"id": "41", "name": "youth culture"}, {"id": "42", "name": "simon frith"}, {"id": "43", "name": "music education"}, {"id": "44", "name": "alternative rock"}, {"id": "45", "name": "double bass"}, {"id": "46", "name": "music festival"}, {"id": "47", "name": "hard rock"}, {"id": "48", "name": "pop music"}, {"id": "49", "name": "music theory"}, {"id": "50", "name": "hollywood film"}, {"id": "51", "name": "cultural identity"}, {"id": "52", "name": "folk song"}, {"id": "53", "name": "popular music"}, {"id": "54", "name": "american popular music"}, {"id": "55", "name": "rock criticism"}, {"id": "56", "name": "bruce springsteen"}, {"id": "57", "name": "north america"}, {"id": "58", "name": "music therapy"}, {"id": "59", "name": "college students"}, {"id": "60", "name": "cultural studies"}, {"id": "61", "name": "progressive rock"}, {"id": "62", "name": "led zeppelin"}, {"id": "63", "name": "post rock"}, {"id": "64", "name": "english language"}, {"id": "65", "name": "country music"}, {"id": "66", "name": "hong kong"}, {"id": "67", "name": "rock art"}, {"id": "68", "name": "hearing loss"}, {"id": "69", "name": "classical music"}, {"id": "70", "name": "world war"}, {"id": "71", "name": "latin american"}, {"id": "72", "name": "jimi hendrix"}, {"id": "73", "name": "southern rock"}, {"id": "74", "name": "united states"}, {"id": "75", "name": "world war ii"}, {"id": "76", "name": "los angeles"}, {"id": "77", "name": "rock music"}, {"id": "78", "name": "hip hop"}, {"id": "79", "name": "popular culture"}, {"id": "80", "name": "folk music"}, {"id": "81", "name": "avant garde"}, {"id": "82", "name": "heavy metal"}, {"id": "83", "name": "folk rock"}, {"id": "84", "name": "artificial intelligence"}, {"id": "85", "name": "jewish music"}, {"id": "86", "name": "south korea"}, {"id": "87", "name": "music hall"}, {"id": "88", "name": "oxford university press"}, {"id": "89", "name": "electronic music"}, {"id": "90", "name": "blues rock"}], "evolve_edges": [{"2000": [{"source": "1", "target": "28", "source_name": "rock star", "target_name": "high school", "weight": 1.0, "year": 2000}, {"source": "1", "target": "77", "source_name": "rock star", "target_name": "rock music", "weight": 1.0, "year": 2000}, {"source": "1", "target": "82", "source_name": "rock star", "target_name": "heavy metal", "weight": 1.0, "year": 2000}, {"source": "4", "target": "9", "source_name": "gregorian chant", "target_name": "compact disc", "weight": 1.0, "year": 2000}, {"source": "4", "target": "37", "source_name": "gregorian chant", "target_name": "middle ages", "weight": 1.0, "year": 2000}, {"source": "6", "target": "41", "source_name": "elvis presley", "target_name": "youth culture", "weight": 1.0, "year": 2000}, {"source": "6", "target": "51", "source_name": "elvis presley", "target_name": "cultural identity", "weight": 1.0, "year": 2000}, {"source": "6", "target": "60", "source_name": "elvis presley", "target_name": "cultural studies", "weight": 1.0, "year": 2000}, {"source": "6", "target": "77", "source_name": "elvis presley", "target_name": "rock music", "weight": 1.0, "year": 2000}, {"source": "7", "target": "43", "source_name": "nineteenth century", "target_name": "music education", "weight": 1.0, "year": 2000}, {"source": "9", "target": "37", "source_name": "compact disc", "target_name": "middle ages", "weight": 1.0, "year": 2000}, {"source": "11", "target": "36", "source_name": "south africa", "target_name": "music industry", "weight": 1.0, "year": 2000}, {"source": "11", "target": "74", "source_name": "south africa", "target_name": "united states", "weight": 1.0, "year": 2000}, {"source": "11", "target": "88", "source_name": "south africa", "target_name": "oxford university press", "weight": 1.0, "year": 2000}, {"source": "16", "target": "53", "source_name": "bob dylan", "target_name": "popular music", "weight": 1.0, "year": 2000}, {"source": "16", "target": "69", "source_name": "bob dylan", "target_name": "classical music", "weight": 1.0, "year": 2000}, {"source": "17", "target": "41", "source_name": "civil rights", "target_name": "youth culture", "weight": 1.0, "year": 2000}, {"source": "17", "target": "53", "source_name": "civil rights", "target_name": "popular music", "weight": 1.0, "year": 2000}, {"source": "17", "target": "75", "source_name": "civil rights", "target_name": "world war ii", "weight": 1.0, "year": 2000}, {"source": "19", "target": "36", "source_name": "music video", "target_name": "music industry", "weight": 1.0, "year": 2000}, {"source": "19", "target": "65", "source_name": "music video", "target_name": "country music", "weight": 1.0, "year": 2000}, {"source": "19", "target": "77", "source_name": "music video", "target_name": "rock music", "weight": 1.0, "year": 2000}, {"source": "22", "target": "69", "source_name": "chamber music", "target_name": "classical music", "weight": 1.0, "year": 2000}, {"source": "23", "target": "42", "source_name": "electronic dance music", "target_name": "simon frith", "weight": 1.0, "year": 2000}, {"source": "23", "target": "53", "source_name": "electronic dance music", "target_name": "popular music", "weight": 2.0, "year": 2000}, {"source": "23", "target": "60", "source_name": "electronic dance music", "target_name": "cultural studies", "weight": 1.0, "year": 2000}, {"source": "23", "target": "76", "source_name": "electronic dance music", "target_name": "los angeles", "weight": 1.0, "year": 2000}, {"source": "23", "target": "79", "source_name": "electronic dance music", "target_name": "popular culture", "weight": 1.0, "year": 2000}, {"source": "28", "target": "77", "source_name": "high school", "target_name": "rock music", "weight": 1.0, "year": 2000}, {"source": "28", "target": "82", "source_name": "high school", "target_name": "heavy metal", "weight": 1.0, "year": 2000}, {"source": "29", "target": "56", "source_name": "rolling stone", "target_name": "bruce springsteen", "weight": 1.0, "year": 2000}, {"source": "29", "target": "77", "source_name": "rolling stone", "target_name": "rock music", "weight": 1.0, "year": 2000}, {"source": "30", "target": "61", "source_name": "rock band", "target_name": "progressive rock", "weight": 1.0, "year": 2000}, {"source": "30", "target": "69", "source_name": "rock band", "target_name": "classical music", "weight": 1.0, "year": 2000}, {"source": "30", "target": "74", "source_name": "rock band", "target_name": "united states", "weight": 1.0, "year": 2000}, {"source": "30", "target": "77", "source_name": "rock band", "target_name": "rock music", "weight": 1.0, "year": 2000}, {"source": "30", "target": "80", "source_name": "rock band", "target_name": "folk music", "weight": 1.0, "year": 2000}, {"source": "36", "target": "53", "source_name": "music industry", "target_name": "popular music", "weight": 2.0, "year": 2000}, {"source": "36", "target": "65", "source_name": "music industry", "target_name": "country music", "weight": 1.0, "year": 2000}, {"source": "36", "target": "69", "source_name": "music industry", "target_name": "classical music", "weight": 1.0, "year": 2000}, {"source": "36", "target": "74", "source_name": "music industry", "target_name": "united states", "weight": 1.0, "year": 2000}, {"source": "36", "target": "77", "source_name": "music industry", "target_name": "rock music", "weight": 1.0, "year": 2000}, {"source": "36", "target": "79", "source_name": "music industry", "target_name": "popular culture", "weight": 1.0, "year": 2000}, {"source": "37", "target": "58", "source_name": "middle ages", "target_name": "music therapy", "weight": 1.0, "year": 2000}, {"source": "37", "target": "69", "source_name": "middle ages", "target_name": "classical music", "weight": 1.0, "year": 2000}, {"source": "41", "target": "51", "source_name": "youth culture", "target_name": "cultural identity", "weight": 1.0, "year": 2000}, {"source": "41", "target": "53", "source_name": "youth culture", "target_name": "popular music", "weight": 1.0, "year": 2000}, {"source": "41", "target": "60", "source_name": "youth culture", "target_name": "cultural studies", "weight": 1.0, "year": 2000}, {"source": "41", "target": "75", "source_name": "youth culture", "target_name": "world war ii", "weight": 1.0, "year": 2000}, {"source": "41", "target": "77", "source_name": "youth culture", "target_name": "rock music", "weight": 1.0, "year": 2000}, {"source": "42", "target": "53", "source_name": "simon frith", "target_name": "popular music", "weight": 1.0, "year": 2000}, {"source": "42", "target": "76", "source_name": "simon frith", "target_name": "los angeles", "weight": 1.0, "year": 2000}, {"source": "43", "target": "53", "source_name": "music education", "target_name": "popular music", "weight": 1.0, "year": 2000}, {"source": "43", "target": "77", "source_name": "music education", "target_name": "rock music", "weight": 1.0, "year": 2000}, {"source": "43", "target": "80", "source_name": "music education", "target_name": "folk music", "weight": 1.0, "year": 2000}, {"source": "44", "target": "53", "source_name": "alternative rock", "target_name": "popular music", "weight": 2.0, "year": 2000}, {"source": "44", "target": "67", "source_name": "alternative rock", "target_name": "rock art", "weight": 1.0, "year": 2000}, {"source": "44", "target": "77", "source_name": "alternative rock", "target_name": "rock music", "weight": 2.0, "year": 2000}, {"source": "48", "target": "53", "source_name": "pop music", "target_name": "popular music", "weight": 1.0, "year": 2000}, {"source": "48", "target": "66", "source_name": "pop music", "target_name": "hong kong", "weight": 1.0, "year": 2000}, {"source": "48", "target": "74", "source_name": "pop music", "target_name": "united states", "weight": 1.0, "year": 2000}, {"source": "48", "target": "77", "source_name": "pop music", "target_name": "rock music", "weight": 1.0, "year": 2000}, {"source": "49", "target": "53", "source_name": "music theory", "target_name": "popular music", "weight": 1.0, "year": 2000}, {"source": "49", "target": "72", "source_name": "music theory", "target_name": "jimi hendrix", "weight": 1.0, "year": 2000}, {"source": "49", "target": "77", "source_name": "music theory", "target_name": "rock music", "weight": 1.0, "year": 2000}, {"source": "51", "target": "60", "source_name": "cultural identity", "target_name": "cultural studies", "weight": 1.0, "year": 2000}, {"source": "51", "target": "77", "source_name": "cultural identity", "target_name": "rock music", "weight": 1.0, "year": 2000}, {"source": "53", "target": "59", "source_name": "popular music", "target_name": "college students", "weight": 1.0, "year": 2000}, {"source": "53", "target": "60", "source_name": "popular music", "target_name": "cultural studies", "weight": 1.0, "year": 2000}, {"source": "53", "target": "67", "source_name": "popular music", "target_name": "rock art", "weight": 1.0, "year": 2000}, {"source": "53", "target": "69", "source_name": "popular music", "target_name": "classical music", "weight": 2.0, "year": 2000}, {"source": "53", "target": "70", "source_name": "popular music", "target_name": "world war", "weight": 1.0, "year": 2000}, {"source": "53", "target": "74", "source_name": "popular music", "target_name": "united states", "weight": 2.0, "year": 2000}, {"source": "53", "target": "75", "source_name": "popular music", "target_name": "world war ii", "weight": 2.0, "year": 2000}, {"source": "53", "target": "76", "source_name": "popular music", "target_name": "los angeles", "weight": 1.0, "year": 2000}, {"source": "53", "target": "77", "source_name": "popular music", "target_name": "rock music", "weight": 7.0, "year": 2000}, {"source": "53", "target": "79", "source_name": "popular music", "target_name": "popular culture", "weight": 2.0, "year": 2000}, {"source": "55", "target": "61", "source_name": "rock criticism", "target_name": "progressive rock", "weight": 1.0, "year": 2000}, {"source": "55", "target": "77", "source_name": "rock criticism", "target_name": "rock music", "weight": 1.0, "year": 2000}, {"source": "56", "target": "77", "source_name": "bruce springsteen", "target_name": "rock music", "weight": 1.0, "year": 2000}, {"source": "59", "target": "74", "source_name": "college students", "target_name": "united states", "weight": 1.0, "year": 2000}, {"source": "60", "target": "77", "source_name": "cultural studies", "target_name": "rock music", "weight": 1.0, "year": 2000}, {"source": "60", "target": "79", "source_name": "cultural studies", "target_name": "popular culture", "weight": 1.0, "year": 2000}, {"source": "61", "target": "69", "source_name": "progressive rock", "target_name": "classical music", "weight": 1.0, "year": 2000}, {"source": "61", "target": "74", "source_name": "progressive rock", "target_name": "united states", "weight": 1.0, "year": 2000}, {"source": "61", "target": "77", "source_name": "progressive rock", "target_name": "rock music", "weight": 2.0, "year": 2000}, {"source": "65", "target": "77", "source_name": "country music", "target_name": "rock music", "weight": 1.0, "year": 2000}, {"source": "66", "target": "77", "source_name": "hong kong", "target_name": "rock music", "weight": 1.0, "year": 2000}, {"source": "67", "target": "77", "source_name": "rock art", "target_name": "rock music", "weight": 1.0, "year": 2000}, {"source": "68", "target": "77", "source_name": "hearing loss", "target_name": "rock music", "weight": 1.0, "year": 2000}, {"source": "69", "target": "72", "source_name": "classical music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2000}, {"source": "69", "target": "74", "source_name": "classical music", "target_name": "united states", "weight": 1.0, "year": 2000}, {"source": "69", "target": "77", "source_name": "classical music", "target_name": "rock music", "weight": 2.0, "year": 2000}, {"source": "69", "target": "89", "source_name": "classical music", "target_name": "electronic music", "weight": 1.0, "year": 2000}, {"source": "70", "target": "77", "source_name": "world war", "target_name": "rock music", "weight": 2.0, "year": 2000}, {"source": "70", "target": "89", "source_name": "world war", "target_name": "electronic music", "weight": 1.0, "year": 2000}, {"source": "72", "target": "77", "source_name": "jimi hendrix", "target_name": "rock music", "weight": 1.0, "year": 2000}, {"source": "72", "target": "89", "source_name": "jimi hendrix", "target_name": "electronic music", "weight": 1.0, "year": 2000}, {"source": "74", "target": "77", "source_name": "united states", "target_name": "rock music", "weight": 1.0, "year": 2000}, {"source": "77", "target": "82", "source_name": "rock music", "target_name": "heavy metal", "weight": 1.0, "year": 2000}, {"source": "77", "target": "89", "source_name": "rock music", "target_name": "electronic music", "weight": 1.0, "year": 2000}]}, {"2001": [{"source": "1", "target": "28", "source_name": "rock star", "target_name": "high school", "weight": 1.0, "year": 2001}, {"source": "1", "target": "77", "source_name": "rock star", "target_name": "rock music", "weight": 1.0, "year": 2001}, {"source": "1", "target": "82", "source_name": "rock star", "target_name": "heavy metal", "weight": 1.0, "year": 2001}, {"source": "4", "target": "9", "source_name": "gregorian chant", "target_name": "compact disc", "weight": 1.0, "year": 2001}, {"source": "4", "target": "37", "source_name": "gregorian chant", "target_name": "middle ages", "weight": 1.0, "year": 2001}, {"source": "6", "target": "16", "source_name": "elvis presley", "target_name": "bob dylan", "weight": 1.0, "year": 2001}, {"source": "6", "target": "29", "source_name": "elvis presley", "target_name": "rolling stone", "weight": 1.0, "year": 2001}, {"source": "6", "target": "36", "source_name": "elvis presley", "target_name": "music industry", "weight": 1.0, "year": 2001}, {"source": "6", "target": "41", "source_name": "elvis presley", "target_name": "youth culture", "weight": 1.0, "year": 2001}, {"source": "6", "target": "42", "source_name": "elvis presley", "target_name": "simon frith", "weight": 1.0, "year": 2001}, {"source": "6", "target": "48", "source_name": "elvis presley", "target_name": "pop music", "weight": 1.0, "year": 2001}, {"source": "6", "target": "51", "source_name": "elvis presley", "target_name": "cultural identity", "weight": 1.0, "year": 2001}, {"source": "6", "target": "53", "source_name": "elvis presley", "target_name": "popular music", "weight": 2.0, "year": 2001}, {"source": "6", "target": "60", "source_name": "elvis presley", "target_name": "cultural studies", "weight": 1.0, "year": 2001}, {"source": "6", "target": "72", "source_name": "elvis presley", "target_name": "jimi hendrix", "weight": 1.0, "year": 2001}, {"source": "6", "target": "77", "source_name": "elvis presley", "target_name": "rock music", "weight": 1.0, "year": 2001}, {"source": "7", "target": "34", "source_name": "nineteenth century", "target_name": "mass media", "weight": 1.0, "year": 2001}, {"source": "7", "target": "43", "source_name": "nineteenth century", "target_name": "music education", "weight": 1.0, "year": 2001}, {"source": "7", "target": "52", "source_name": "nineteenth century", "target_name": "folk song", "weight": 1.0, "year": 2001}, {"source": "7", "target": "53", "source_name": "nineteenth century", "target_name": "popular music", "weight": 1.0, "year": 2001}, {"source": "7", "target": "69", "source_name": "nineteenth century", "target_name": "classical music", "weight": 1.0, "year": 2001}, {"source": "9", "target": "37", "source_name": "compact disc", "target_name": "middle ages", "weight": 1.0, "year": 2001}, {"source": "11", "target": "36", "source_name": "south africa", "target_name": "music industry", "weight": 1.0, "year": 2001}, {"source": "11", "target": "74", "source_name": "south africa", "target_name": "united states", "weight": 2.0, "year": 2001}, {"source": "11", "target": "88", "source_name": "south africa", "target_name": "oxford university press", "weight": 1.0, "year": 2001}, {"source": "16", "target": "29", "source_name": "bob dylan", "target_name": "rolling stone", "weight": 1.0, "year": 2001}, {"source": "16", "target": "36", "source_name": "bob dylan", "target_name": "music industry", "weight": 1.0, "year": 2001}, {"source": "16", "target": "42", "source_name": "bob dylan", "target_name": "simon frith", "weight": 1.0, "year": 2001}, {"source": "16", "target": "48", "source_name": "bob dylan", "target_name": "pop music", "weight": 1.0, "year": 2001}, {"source": "16", "target": "53", "source_name": "bob dylan", "target_name": "popular music", "weight": 2.0, "year": 2001}, {"source": "16", "target": "69", "source_name": "bob dylan", "target_name": "classical music", "weight": 1.0, "year": 2001}, {"source": "16", "target": "72", "source_name": "bob dylan", "target_name": "jimi hendrix", "weight": 1.0, "year": 2001}, {"source": "17", "target": "41", "source_name": "civil rights", "target_name": "youth culture", "weight": 1.0, "year": 2001}, {"source": "17", "target": "53", "source_name": "civil rights", "target_name": "popular music", "weight": 1.0, "year": 2001}, {"source": "17", "target": "75", "source_name": "civil rights", "target_name": "world war ii", "weight": 1.0, "year": 2001}, {"source": "19", "target": "36", "source_name": "music video", "target_name": "music industry", "weight": 1.0, "year": 2001}, {"source": "19", "target": "47", "source_name": "music video", "target_name": "hard rock", "weight": 1.0, "year": 2001}, {"source": "19", "target": "48", "source_name": "music video", "target_name": "pop music", "weight": 2.0, "year": 2001}, {"source": "19", "target": "65", "source_name": "music video", "target_name": "country music", "weight": 1.0, "year": 2001}, {"source": "19", "target": "77", "source_name": "music video", "target_name": "rock music", "weight": 1.0, "year": 2001}, {"source": "22", "target": "69", "source_name": "chamber music", "target_name": "classical music", "weight": 1.0, "year": 2001}, {"source": "23", "target": "42", "source_name": "electronic dance music", "target_name": "simon frith", "weight": 1.0, "year": 2001}, {"source": "23", "target": "53", "source_name": "electronic dance music", "target_name": "popular music", "weight": 2.0, "year": 2001}, {"source": "23", "target": "60", "source_name": "electronic dance music", "target_name": "cultural studies", "weight": 1.0, "year": 2001}, {"source": "23", "target": "76", "source_name": "electronic dance music", "target_name": "los angeles", "weight": 1.0, "year": 2001}, {"source": "23", "target": "79", "source_name": "electronic dance music", "target_name": "popular culture", "weight": 1.0, "year": 2001}, {"source": "24", "target": "53", "source_name": "punk rock", "target_name": "popular music", "weight": 1.0, "year": 2001}, {"source": "24", "target": "78", "source_name": "punk rock", "target_name": "hip hop", "weight": 1.0, "year": 2001}, {"source": "24", "target": "82", "source_name": "punk rock", "target_name": "heavy metal", "weight": 1.0, "year": 2001}, {"source": "28", "target": "37", "source_name": "high school", "target_name": "middle ages", "weight": 1.0, "year": 2001}, {"source": "28", "target": "77", "source_name": "high school", "target_name": "rock music", "weight": 2.0, "year": 2001}, {"source": "28", "target": "82", "source_name": "high school", "target_name": "heavy metal", "weight": 1.0, "year": 2001}, {"source": "29", "target": "36", "source_name": "rolling stone", "target_name": "music industry", "weight": 1.0, "year": 2001}, {"source": "29", "target": "42", "source_name": "rolling stone", "target_name": "simon frith", "weight": 1.0, "year": 2001}, {"source": "29", "target": "48", "source_name": "rolling stone", "target_name": "pop music", "weight": 1.0, "year": 2001}, {"source": "29", "target": "53", "source_name": "rolling stone", "target_name": "popular music", "weight": 1.0, "year": 2001}, {"source": "29", "target": "56", "source_name": "rolling stone", "target_name": "bruce springsteen", "weight": 1.0, "year": 2001}, {"source": "29", "target": "72", "source_name": "rolling stone", "target_name": "jimi hendrix", "weight": 1.0, "year": 2001}, {"source": "29", "target": "77", "source_name": "rolling stone", "target_name": "rock music", "weight": 1.0, "year": 2001}, {"source": "30", "target": "36", "source_name": "rock band", "target_name": "music industry", "weight": 1.0, "year": 2001}, {"source": "30", "target": "53", "source_name": "rock band", "target_name": "popular music", "weight": 2.0, "year": 2001}, {"source": "30", "target": "61", "source_name": "rock band", "target_name": "progressive rock", "weight": 3.0, "year": 2001}, {"source": "30", "target": "69", "source_name": "rock band", "target_name": "classical music", "weight": 1.0, "year": 2001}, {"source": "30", "target": "72", "source_name": "rock band", "target_name": "jimi hendrix", "weight": 1.0, "year": 2001}, {"source": "30", "target": "74", "source_name": "rock band", "target_name": "united states", "weight": 1.0, "year": 2001}, {"source": "30", "target": "77", "source_name": "rock band", "target_name": "rock music", "weight": 3.0, "year": 2001}, {"source": "30", "target": "80", "source_name": "rock band", "target_name": "folk music", "weight": 1.0, "year": 2001}, {"source": "30", "target": "82", "source_name": "rock band", "target_name": "heavy metal", "weight": 1.0, "year": 2001}, {"source": "34", "target": "48", "source_name": "mass media", "target_name": "pop music", "weight": 1.0, "year": 2001}, {"source": "34", "target": "51", "source_name": "mass media", "target_name": "cultural identity", "weight": 1.0, "year": 2001}, {"source": "34", "target": "52", "source_name": "mass media", "target_name": "folk song", "weight": 2.0, "year": 2001}, {"source": "34", "target": "53", "source_name": "mass media", "target_name": "popular music", "weight": 2.0, "year": 2001}, {"source": "34", "target": "66", "source_name": "mass media", "target_name": "hong kong", "weight": 1.0, "year": 2001}, {"source": "34", "target": "69", "source_name": "mass media", "target_name": "classical music", "weight": 1.0, "year": 2001}, {"source": "34", "target": "77", "source_name": "mass media", "target_name": "rock music", "weight": 1.0, "year": 2001}, {"source": "36", "target": "42", "source_name": "music industry", "target_name": "simon frith", "weight": 1.0, "year": 2001}, {"source": "36", "target": "43", "source_name": "music industry", "target_name": "music education", "weight": 1.0, "year": 2001}, {"source": "36", "target": "48", "source_name": "music industry", "target_name": "pop music", "weight": 1.0, "year": 2001}, {"source": "36", "target": "53", "source_name": "music industry", "target_name": "popular music", "weight": 5.0, "year": 2001}, {"source": "36", "target": "61", "source_name": "music industry", "target_name": "progressive rock", "weight": 1.0, "year": 2001}, {"source": "36", "target": "65", "source_name": "music industry", "target_name": "country music", "weight": 1.0, "year": 2001}, {"source": "36", "target": "68", "source_name": "music industry", "target_name": "hearing loss", "weight": 1.0, "year": 2001}, {"source": "36", "target": "69", "source_name": "music industry", "target_name": "classical music", "weight": 1.0, "year": 2001}, {"source": "36", "target": "72", "source_name": "music industry", "target_name": "jimi hendrix", "weight": 2.0, "year": 2001}, {"source": "36", "target": "74", "source_name": "music industry", "target_name": "united states", "weight": 1.0, "year": 2001}, {"source": "36", "target": "77", "source_name": "music industry", "target_name": "rock music", "weight": 3.0, "year": 2001}, {"source": "36", "target": "79", "source_name": "music industry", "target_name": "popular culture", "weight": 1.0, "year": 2001}, {"source": "36", "target": "83", "source_name": "music industry", "target_name": "folk rock", "weight": 1.0, "year": 2001}, {"source": "37", "target": "58", "source_name": "middle ages", "target_name": "music therapy", "weight": 1.0, "year": 2001}, {"source": "37", "target": "69", "source_name": "middle ages", "target_name": "classical music", "weight": 1.0, "year": 2001}, {"source": "37", "target": "77", "source_name": "middle ages", "target_name": "rock music", "weight": 1.0, "year": 2001}, {"source": "40", "target": "89", "source_name": "musical instruments", "target_name": "electronic music", "weight": 1.0, "year": 2001}, {"source": "41", "target": "51", "source_name": "youth culture", "target_name": "cultural identity", "weight": 1.0, "year": 2001}, {"source": "41", "target": "53", "source_name": "youth culture", "target_name": "popular music", "weight": 1.0, "year": 2001}, {"source": "41", "target": "60", "source_name": "youth culture", "target_name": "cultural studies", "weight": 1.0, "year": 2001}, {"source": "41", "target": "75", "source_name": "youth culture", "target_name": "world war ii", "weight": 1.0, "year": 2001}, {"source": "41", "target": "77", "source_name": "youth culture", "target_name": "rock music", "weight": 1.0, "year": 2001}, {"source": "42", "target": "48", "source_name": "simon frith", "target_name": "pop music", "weight": 3.0, "year": 2001}, {"source": "42", "target": "53", "source_name": "simon frith", "target_name": "popular music", "weight": 3.0, "year": 2001}, {"source": "42", "target": "55", "source_name": "simon frith", "target_name": "rock criticism", "weight": 1.0, "year": 2001}, {"source": "42", "target": "57", "source_name": "simon frith", "target_name": "north america", "weight": 1.0, "year": 2001}, {"source": "42", "target": "72", "source_name": "simon frith", "target_name": "jimi hendrix", "weight": 1.0, "year": 2001}, {"source": "42", "target": "76", "source_name": "simon frith", "target_name": "los angeles", "weight": 1.0, "year": 2001}, {"source": "43", "target": "53", "source_name": "music education", "target_name": "popular music", "weight": 1.0, "year": 2001}, {"source": "43", "target": "77", "source_name": "music education", "target_name": "rock music", "weight": 1.0, "year": 2001}, {"source": "43", "target": "80", "source_name": "music education", "target_name": "folk music", "weight": 1.0, "year": 2001}, {"source": "44", "target": "53", "source_name": "alternative rock", "target_name": "popular music", "weight": 2.0, "year": 2001}, {"source": "44", "target": "67", "source_name": "alternative rock", "target_name": "rock art", "weight": 1.0, "year": 2001}, {"source": "44", "target": "77", "source_name": "alternative rock", "target_name": "rock music", "weight": 2.0, "year": 2001}, {"source": "47", "target": "48", "source_name": "hard rock", "target_name": "pop music", "weight": 1.0, "year": 2001}, {"source": "48", "target": "51", "source_name": "pop music", "target_name": "cultural identity", "weight": 1.0, "year": 2001}, {"source": "48", "target": "52", "source_name": "pop music", "target_name": "folk song", "weight": 1.0, "year": 2001}, {"source": "48", "target": "53", "source_name": "pop music", "target_name": "popular music", "weight": 4.0, "year": 2001}, {"source": "48", "target": "55", "source_name": "pop music", "target_name": "rock criticism", "weight": 1.0, "year": 2001}, {"source": "48", "target": "57", "source_name": "pop music", "target_name": "north america", "weight": 1.0, "year": 2001}, {"source": "48", "target": "66", "source_name": "pop music", "target_name": "hong kong", "weight": 2.0, "year": 2001}, {"source": "48", "target": "72", "source_name": "pop music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2001}, {"source": "48", "target": "74", "source_name": "pop music", "target_name": "united states", "weight": 1.0, "year": 2001}, {"source": "48", "target": "77", "source_name": "pop music", "target_name": "rock music", "weight": 3.0, "year": 2001}, {"source": "48", "target": "79", "source_name": "pop music", "target_name": "popular culture", "weight": 1.0, "year": 2001}, {"source": "48", "target": "82", "source_name": "pop music", "target_name": "heavy metal", "weight": 1.0, "year": 2001}, {"source": "49", "target": "53", "source_name": "music theory", "target_name": "popular music", "weight": 1.0, "year": 2001}, {"source": "49", "target": "72", "source_name": "music theory", "target_name": "jimi hendrix", "weight": 1.0, "year": 2001}, {"source": "49", "target": "77", "source_name": "music theory", "target_name": "rock music", "weight": 1.0, "year": 2001}, {"source": "50", "target": "53", "source_name": "hollywood film", "target_name": "popular music", "weight": 1.0, "year": 2001}, {"source": "50", "target": "79", "source_name": "hollywood film", "target_name": "popular culture", "weight": 1.0, "year": 2001}, {"source": "51", "target": "52", "source_name": "cultural identity", "target_name": "folk song", "weight": 1.0, "year": 2001}, {"source": "51", "target": "53", "source_name": "cultural identity", "target_name": "popular music", "weight": 1.0, "year": 2001}, {"source": "51", "target": "60", "source_name": "cultural identity", "target_name": "cultural studies", "weight": 1.0, "year": 2001}, {"source": "51", "target": "66", "source_name": "cultural identity", "target_name": "hong kong", "weight": 1.0, "year": 2001}, {"source": "51", "target": "77", "source_name": "cultural identity", "target_name": "rock music", "weight": 2.0, "year": 2001}, {"source": "52", "target": "53", "source_name": "folk song", "target_name": "popular music", "weight": 2.0, "year": 2001}, {"source": "52", "target": "66", "source_name": "folk song", "target_name": "hong kong", "weight": 1.0, "year": 2001}, {"source": "52", "target": "69", "source_name": "folk song", "target_name": "classical music", "weight": 1.0, "year": 2001}, {"source": "52", "target": "77", "source_name": "folk song", "target_name": "rock music", "weight": 1.0, "year": 2001}, {"source": "53", "target": "54", "source_name": "popular music", "target_name": "american popular music", "weight": 1.0, "year": 2001}, {"source": "53", "target": "56", "source_name": "popular music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2001}, {"source": "53", "target": "59", "source_name": "popular music", "target_name": "college students", "weight": 1.0, "year": 2001}, {"source": "53", "target": "60", "source_name": "popular music", "target_name": "cultural studies", "weight": 1.0, "year": 2001}, {"source": "53", "target": "61", "source_name": "popular music", "target_name": "progressive rock", "weight": 2.0, "year": 2001}, {"source": "53", "target": "66", "source_name": "popular music", "target_name": "hong kong", "weight": 1.0, "year": 2001}, {"source": "53", "target": "67", "source_name": "popular music", "target_name": "rock art", "weight": 1.0, "year": 2001}, {"source": "53", "target": "69", "source_name": "popular music", "target_name": "classical music", "weight": 3.0, "year": 2001}, {"source": "53", "target": "70", "source_name": "popular music", "target_name": "world war", "weight": 1.0, "year": 2001}, {"source": "53", "target": "72", "source_name": "popular music", "target_name": "jimi hendrix", "weight": 3.0, "year": 2001}, {"source": "53", "target": "74", "source_name": "popular music", "target_name": "united states", "weight": 2.0, "year": 2001}, {"source": "53", "target": "75", "source_name": "popular music", "target_name": "world war ii", "weight": 2.0, "year": 2001}, {"source": "53", "target": "76", "source_name": "popular music", "target_name": "los angeles", "weight": 1.0, "year": 2001}, {"source": "53", "target": "77", "source_name": "popular music", "target_name": "rock music", "weight": 12.0, "year": 2001}, {"source": "53", "target": "78", "source_name": "popular music", "target_name": "hip hop", "weight": 1.0, "year": 2001}, {"source": "53", "target": "79", "source_name": "popular music", "target_name": "popular culture", "weight": 4.0, "year": 2001}, {"source": "53", "target": "82", "source_name": "popular music", "target_name": "heavy metal", "weight": 2.0, "year": 2001}, {"source": "53", "target": "83", "source_name": "popular music", "target_name": "folk rock", "weight": 1.0, "year": 2001}, {"source": "55", "target": "57", "source_name": "rock criticism", "target_name": "north america", "weight": 1.0, "year": 2001}, {"source": "55", "target": "61", "source_name": "rock criticism", "target_name": "progressive rock", "weight": 1.0, "year": 2001}, {"source": "55", "target": "77", "source_name": "rock criticism", "target_name": "rock music", "weight": 1.0, "year": 2001}, {"source": "56", "target": "72", "source_name": "bruce springsteen", "target_name": "jimi hendrix", "weight": 1.0, "year": 2001}, {"source": "56", "target": "77", "source_name": "bruce springsteen", "target_name": "rock music", "weight": 2.0, "year": 2001}, {"source": "56", "target": "79", "source_name": "bruce springsteen", "target_name": "popular culture", "weight": 1.0, "year": 2001}, {"source": "58", "target": "77", "source_name": "music therapy", "target_name": "rock music", "weight": 1.0, "year": 2001}, {"source": "59", "target": "74", "source_name": "college students", "target_name": "united states", "weight": 1.0, "year": 2001}, {"source": "60", "target": "71", "source_name": "cultural studies", "target_name": "latin american", "weight": 1.0, "year": 2001}, {"source": "60", "target": "77", "source_name": "cultural studies", "target_name": "rock music", "weight": 2.0, "year": 2001}, {"source": "60", "target": "79", "source_name": "cultural studies", "target_name": "popular culture", "weight": 1.0, "year": 2001}, {"source": "61", "target": "69", "source_name": "progressive rock", "target_name": "classical music", "weight": 2.0, "year": 2001}, {"source": "61", "target": "72", "source_name": "progressive rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2001}, {"source": "61", "target": "74", "source_name": "progressive rock", "target_name": "united states", "weight": 1.0, "year": 2001}, {"source": "61", "target": "77", "source_name": "progressive rock", "target_name": "rock music", "weight": 5.0, "year": 2001}, {"source": "61", "target": "82", "source_name": "progressive rock", "target_name": "heavy metal", "weight": 1.0, "year": 2001}, {"source": "65", "target": "77", "source_name": "country music", "target_name": "rock music", "weight": 1.0, "year": 2001}, {"source": "66", "target": "77", "source_name": "hong kong", "target_name": "rock music", "weight": 2.0, "year": 2001}, {"source": "67", "target": "77", "source_name": "rock art", "target_name": "rock music", "weight": 1.0, "year": 2001}, {"source": "68", "target": "77", "source_name": "hearing loss", "target_name": "rock music", "weight": 2.0, "year": 2001}, {"source": "69", "target": "72", "source_name": "classical music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2001}, {"source": "69", "target": "74", "source_name": "classical music", "target_name": "united states", "weight": 1.0, "year": 2001}, {"source": "69", "target": "77", "source_name": "classical music", "target_name": "rock music", "weight": 3.0, "year": 2001}, {"source": "69", "target": "89", "source_name": "classical music", "target_name": "electronic music", "weight": 1.0, "year": 2001}, {"source": "70", "target": "77", "source_name": "world war", "target_name": "rock music", "weight": 2.0, "year": 2001}, {"source": "70", "target": "89", "source_name": "world war", "target_name": "electronic music", "weight": 1.0, "year": 2001}, {"source": "71", "target": "77", "source_name": "latin american", "target_name": "rock music", "weight": 1.0, "year": 2001}, {"source": "72", "target": "77", "source_name": "jimi hendrix", "target_name": "rock music", "weight": 3.0, "year": 2001}, {"source": "72", "target": "79", "source_name": "jimi hendrix", "target_name": "popular culture", "weight": 1.0, "year": 2001}, {"source": "72", "target": "89", "source_name": "jimi hendrix", "target_name": "electronic music", "weight": 1.0, "year": 2001}, {"source": "74", "target": "77", "source_name": "united states", "target_name": "rock music", "weight": 1.0, "year": 2001}, {"source": "77", "target": "79", "source_name": "rock music", "target_name": "popular culture", "weight": 2.0, "year": 2001}, {"source": "77", "target": "82", "source_name": "rock music", "target_name": "heavy metal", "weight": 3.0, "year": 2001}, {"source": "77", "target": "89", "source_name": "rock music", "target_name": "electronic music", "weight": 1.0, "year": 2001}, {"source": "78", "target": "82", "source_name": "hip hop", "target_name": "heavy metal", "weight": 1.0, "year": 2001}, {"source": "79", "target": "82", "source_name": "popular culture", "target_name": "heavy metal", "weight": 1.0, "year": 2001}]}, {"2002": [{"source": "1", "target": "28", "source_name": "rock star", "target_name": "high school", "weight": 1.0, "year": 2002}, {"source": "1", "target": "77", "source_name": "rock star", "target_name": "rock music", "weight": 1.0, "year": 2002}, {"source": "1", "target": "82", "source_name": "rock star", "target_name": "heavy metal", "weight": 1.0, "year": 2002}, {"source": "3", "target": "79", "source_name": "glam rock", "target_name": "popular culture", "weight": 1.0, "year": 2002}, {"source": "4", "target": "9", "source_name": "gregorian chant", "target_name": "compact disc", "weight": 1.0, "year": 2002}, {"source": "4", "target": "37", "source_name": "gregorian chant", "target_name": "middle ages", "weight": 1.0, "year": 2002}, {"source": "6", "target": "16", "source_name": "elvis presley", "target_name": "bob dylan", "weight": 1.0, "year": 2002}, {"source": "6", "target": "29", "source_name": "elvis presley", "target_name": "rolling stone", "weight": 1.0, "year": 2002}, {"source": "6", "target": "36", "source_name": "elvis presley", "target_name": "music industry", "weight": 1.0, "year": 2002}, {"source": "6", "target": "41", "source_name": "elvis presley", "target_name": "youth culture", "weight": 1.0, "year": 2002}, {"source": "6", "target": "42", "source_name": "elvis presley", "target_name": "simon frith", "weight": 1.0, "year": 2002}, {"source": "6", "target": "48", "source_name": "elvis presley", "target_name": "pop music", "weight": 1.0, "year": 2002}, {"source": "6", "target": "51", "source_name": "elvis presley", "target_name": "cultural identity", "weight": 1.0, "year": 2002}, {"source": "6", "target": "53", "source_name": "elvis presley", "target_name": "popular music", "weight": 2.0, "year": 2002}, {"source": "6", "target": "60", "source_name": "elvis presley", "target_name": "cultural studies", "weight": 1.0, "year": 2002}, {"source": "6", "target": "72", "source_name": "elvis presley", "target_name": "jimi hendrix", "weight": 1.0, "year": 2002}, {"source": "6", "target": "77", "source_name": "elvis presley", "target_name": "rock music", "weight": 1.0, "year": 2002}, {"source": "7", "target": "34", "source_name": "nineteenth century", "target_name": "mass media", "weight": 1.0, "year": 2002}, {"source": "7", "target": "43", "source_name": "nineteenth century", "target_name": "music education", "weight": 1.0, "year": 2002}, {"source": "7", "target": "52", "source_name": "nineteenth century", "target_name": "folk song", "weight": 1.0, "year": 2002}, {"source": "7", "target": "53", "source_name": "nineteenth century", "target_name": "popular music", "weight": 1.0, "year": 2002}, {"source": "7", "target": "69", "source_name": "nineteenth century", "target_name": "classical music", "weight": 1.0, "year": 2002}, {"source": "9", "target": "37", "source_name": "compact disc", "target_name": "middle ages", "weight": 1.0, "year": 2002}, {"source": "10", "target": "15", "source_name": "african american", "target_name": "musical theatre", "weight": 1.0, "year": 2002}, {"source": "11", "target": "23", "source_name": "south africa", "target_name": "electronic dance music", "weight": 1.0, "year": 2002}, {"source": "11", "target": "36", "source_name": "south africa", "target_name": "music industry", "weight": 1.0, "year": 2002}, {"source": "11", "target": "53", "source_name": "south africa", "target_name": "popular music", "weight": 1.0, "year": 2002}, {"source": "11", "target": "74", "source_name": "south africa", "target_name": "united states", "weight": 2.0, "year": 2002}, {"source": "11", "target": "88", "source_name": "south africa", "target_name": "oxford university press", "weight": 1.0, "year": 2002}, {"source": "16", "target": "29", "source_name": "bob dylan", "target_name": "rolling stone", "weight": 1.0, "year": 2002}, {"source": "16", "target": "36", "source_name": "bob dylan", "target_name": "music industry", "weight": 1.0, "year": 2002}, {"source": "16", "target": "42", "source_name": "bob dylan", "target_name": "simon frith", "weight": 1.0, "year": 2002}, {"source": "16", "target": "48", "source_name": "bob dylan", "target_name": "pop music", "weight": 1.0, "year": 2002}, {"source": "16", "target": "53", "source_name": "bob dylan", "target_name": "popular music", "weight": 2.0, "year": 2002}, {"source": "16", "target": "69", "source_name": "bob dylan", "target_name": "classical music", "weight": 1.0, "year": 2002}, {"source": "16", "target": "72", "source_name": "bob dylan", "target_name": "jimi hendrix", "weight": 1.0, "year": 2002}, {"source": "17", "target": "41", "source_name": "civil rights", "target_name": "youth culture", "weight": 1.0, "year": 2002}, {"source": "17", "target": "53", "source_name": "civil rights", "target_name": "popular music", "weight": 1.0, "year": 2002}, {"source": "17", "target": "75", "source_name": "civil rights", "target_name": "world war ii", "weight": 1.0, "year": 2002}, {"source": "19", "target": "36", "source_name": "music video", "target_name": "music industry", "weight": 1.0, "year": 2002}, {"source": "19", "target": "47", "source_name": "music video", "target_name": "hard rock", "weight": 1.0, "year": 2002}, {"source": "19", "target": "48", "source_name": "music video", "target_name": "pop music", "weight": 2.0, "year": 2002}, {"source": "19", "target": "53", "source_name": "music video", "target_name": "popular music", "weight": 1.0, "year": 2002}, {"source": "19", "target": "65", "source_name": "music video", "target_name": "country music", "weight": 2.0, "year": 2002}, {"source": "19", "target": "77", "source_name": "music video", "target_name": "rock music", "weight": 2.0, "year": 2002}, {"source": "19", "target": "82", "source_name": "music video", "target_name": "heavy metal", "weight": 1.0, "year": 2002}, {"source": "22", "target": "69", "source_name": "chamber music", "target_name": "classical music", "weight": 1.0, "year": 2002}, {"source": "22", "target": "89", "source_name": "chamber music", "target_name": "electronic music", "weight": 1.0, "year": 2002}, {"source": "23", "target": "42", "source_name": "electronic dance music", "target_name": "simon frith", "weight": 1.0, "year": 2002}, {"source": "23", "target": "53", "source_name": "electronic dance music", "target_name": "popular music", "weight": 3.0, "year": 2002}, {"source": "23", "target": "60", "source_name": "electronic dance music", "target_name": "cultural studies", "weight": 1.0, "year": 2002}, {"source": "23", "target": "76", "source_name": "electronic dance music", "target_name": "los angeles", "weight": 1.0, "year": 2002}, {"source": "23", "target": "79", "source_name": "electronic dance music", "target_name": "popular culture", "weight": 1.0, "year": 2002}, {"source": "24", "target": "53", "source_name": "punk rock", "target_name": "popular music", "weight": 1.0, "year": 2002}, {"source": "24", "target": "78", "source_name": "punk rock", "target_name": "hip hop", "weight": 1.0, "year": 2002}, {"source": "24", "target": "82", "source_name": "punk rock", "target_name": "heavy metal", "weight": 1.0, "year": 2002}, {"source": "28", "target": "37", "source_name": "high school", "target_name": "middle ages", "weight": 1.0, "year": 2002}, {"source": "28", "target": "77", "source_name": "high school", "target_name": "rock music", "weight": 2.0, "year": 2002}, {"source": "28", "target": "82", "source_name": "high school", "target_name": "heavy metal", "weight": 1.0, "year": 2002}, {"source": "29", "target": "36", "source_name": "rolling stone", "target_name": "music industry", "weight": 1.0, "year": 2002}, {"source": "29", "target": "42", "source_name": "rolling stone", "target_name": "simon frith", "weight": 1.0, "year": 2002}, {"source": "29", "target": "48", "source_name": "rolling stone", "target_name": "pop music", "weight": 1.0, "year": 2002}, {"source": "29", "target": "53", "source_name": "rolling stone", "target_name": "popular music", "weight": 1.0, "year": 2002}, {"source": "29", "target": "56", "source_name": "rolling stone", "target_name": "bruce springsteen", "weight": 1.0, "year": 2002}, {"source": "29", "target": "72", "source_name": "rolling stone", "target_name": "jimi hendrix", "weight": 1.0, "year": 2002}, {"source": "29", "target": "77", "source_name": "rolling stone", "target_name": "rock music", "weight": 1.0, "year": 2002}, {"source": "30", "target": "36", "source_name": "rock band", "target_name": "music industry", "weight": 1.0, "year": 2002}, {"source": "30", "target": "53", "source_name": "rock band", "target_name": "popular music", "weight": 4.0, "year": 2002}, {"source": "30", "target": "61", "source_name": "rock band", "target_name": "progressive rock", "weight": 3.0, "year": 2002}, {"source": "30", "target": "69", "source_name": "rock band", "target_name": "classical music", "weight": 1.0, "year": 2002}, {"source": "30", "target": "72", "source_name": "rock band", "target_name": "jimi hendrix", "weight": 1.0, "year": 2002}, {"source": "30", "target": "74", "source_name": "rock band", "target_name": "united states", "weight": 1.0, "year": 2002}, {"source": "30", "target": "77", "source_name": "rock band", "target_name": "rock music", "weight": 5.0, "year": 2002}, {"source": "30", "target": "80", "source_name": "rock band", "target_name": "folk music", "weight": 1.0, "year": 2002}, {"source": "30", "target": "82", "source_name": "rock band", "target_name": "heavy metal", "weight": 1.0, "year": 2002}, {"source": "34", "target": "48", "source_name": "mass media", "target_name": "pop music", "weight": 1.0, "year": 2002}, {"source": "34", "target": "51", "source_name": "mass media", "target_name": "cultural identity", "weight": 1.0, "year": 2002}, {"source": "34", "target": "52", "source_name": "mass media", "target_name": "folk song", "weight": 2.0, "year": 2002}, {"source": "34", "target": "53", "source_name": "mass media", "target_name": "popular music", "weight": 3.0, "year": 2002}, {"source": "34", "target": "66", "source_name": "mass media", "target_name": "hong kong", "weight": 1.0, "year": 2002}, {"source": "34", "target": "69", "source_name": "mass media", "target_name": "classical music", "weight": 1.0, "year": 2002}, {"source": "34", "target": "77", "source_name": "mass media", "target_name": "rock music", "weight": 1.0, "year": 2002}, {"source": "36", "target": "42", "source_name": "music industry", "target_name": "simon frith", "weight": 1.0, "year": 2002}, {"source": "36", "target": "43", "source_name": "music industry", "target_name": "music education", "weight": 1.0, "year": 2002}, {"source": "36", "target": "48", "source_name": "music industry", "target_name": "pop music", "weight": 1.0, "year": 2002}, {"source": "36", "target": "53", "source_name": "music industry", "target_name": "popular music", "weight": 6.0, "year": 2002}, {"source": "36", "target": "61", "source_name": "music industry", "target_name": "progressive rock", "weight": 1.0, "year": 2002}, {"source": "36", "target": "65", "source_name": "music industry", "target_name": "country music", "weight": 1.0, "year": 2002}, {"source": "36", "target": "68", "source_name": "music industry", "target_name": "hearing loss", "weight": 1.0, "year": 2002}, {"source": "36", "target": "69", "source_name": "music industry", "target_name": "classical music", "weight": 1.0, "year": 2002}, {"source": "36", "target": "72", "source_name": "music industry", "target_name": "jimi hendrix", "weight": 2.0, "year": 2002}, {"source": "36", "target": "74", "source_name": "music industry", "target_name": "united states", "weight": 1.0, "year": 2002}, {"source": "36", "target": "77", "source_name": "music industry", "target_name": "rock music", "weight": 4.0, "year": 2002}, {"source": "36", "target": "79", "source_name": "music industry", "target_name": "popular culture", "weight": 1.0, "year": 2002}, {"source": "36", "target": "83", "source_name": "music industry", "target_name": "folk rock", "weight": 1.0, "year": 2002}, {"source": "37", "target": "58", "source_name": "middle ages", "target_name": "music therapy", "weight": 1.0, "year": 2002}, {"source": "37", "target": "69", "source_name": "middle ages", "target_name": "classical music", "weight": 1.0, "year": 2002}, {"source": "37", "target": "77", "source_name": "middle ages", "target_name": "rock music", "weight": 1.0, "year": 2002}, {"source": "37", "target": "80", "source_name": "middle ages", "target_name": "folk music", "weight": 2.0, "year": 2002}, {"source": "40", "target": "49", "source_name": "musical instruments", "target_name": "music theory", "weight": 1.0, "year": 2002}, {"source": "40", "target": "70", "source_name": "musical instruments", "target_name": "world war", "weight": 1.0, "year": 2002}, {"source": "40", "target": "75", "source_name": "musical instruments", "target_name": "world war ii", "weight": 1.0, "year": 2002}, {"source": "40", "target": "89", "source_name": "musical instruments", "target_name": "electronic music", "weight": 1.0, "year": 2002}, {"source": "41", "target": "48", "source_name": "youth culture", "target_name": "pop music", "weight": 1.0, "year": 2002}, {"source": "41", "target": "51", "source_name": "youth culture", "target_name": "cultural identity", "weight": 1.0, "year": 2002}, {"source": "41", "target": "53", "source_name": "youth culture", "target_name": "popular music", "weight": 1.0, "year": 2002}, {"source": "41", "target": "60", "source_name": "youth culture", "target_name": "cultural studies", "weight": 2.0, "year": 2002}, {"source": "41", "target": "75", "source_name": "youth culture", "target_name": "world war ii", "weight": 1.0, "year": 2002}, {"source": "41", "target": "77", "source_name": "youth culture", "target_name": "rock music", "weight": 1.0, "year": 2002}, {"source": "42", "target": "48", "source_name": "simon frith", "target_name": "pop music", "weight": 4.0, "year": 2002}, {"source": "42", "target": "51", "source_name": "simon frith", "target_name": "cultural identity", "weight": 1.0, "year": 2002}, {"source": "42", "target": "53", "source_name": "simon frith", "target_name": "popular music", "weight": 4.0, "year": 2002}, {"source": "42", "target": "55", "source_name": "simon frith", "target_name": "rock criticism", "weight": 2.0, "year": 2002}, {"source": "42", "target": "57", "source_name": "simon frith", "target_name": "north america", "weight": 1.0, "year": 2002}, {"source": "42", "target": "60", "source_name": "simon frith", "target_name": "cultural studies", "weight": 1.0, "year": 2002}, {"source": "42", "target": "65", "source_name": "simon frith", "target_name": "country music", "weight": 1.0, "year": 2002}, {"source": "42", "target": "72", "source_name": "simon frith", "target_name": "jimi hendrix", "weight": 1.0, "year": 2002}, {"source": "42", "target": "76", "source_name": "simon frith", "target_name": "los angeles", "weight": 1.0, "year": 2002}, {"source": "42", "target": "77", "source_name": "simon frith", "target_name": "rock music", "weight": 1.0, "year": 2002}, {"source": "42", "target": "79", "source_name": "simon frith", "target_name": "popular culture", "weight": 1.0, "year": 2002}, {"source": "43", "target": "53", "source_name": "music education", "target_name": "popular music", "weight": 2.0, "year": 2002}, {"source": "43", "target": "77", "source_name": "music education", "target_name": "rock music", "weight": 1.0, "year": 2002}, {"source": "43", "target": "80", "source_name": "music education", "target_name": "folk music", "weight": 1.0, "year": 2002}, {"source": "44", "target": "53", "source_name": "alternative rock", "target_name": "popular music", "weight": 4.0, "year": 2002}, {"source": "44", "target": "57", "source_name": "alternative rock", "target_name": "north america", "weight": 2.0, "year": 2002}, {"source": "44", "target": "65", "source_name": "alternative rock", "target_name": "country music", "weight": 1.0, "year": 2002}, {"source": "44", "target": "67", "source_name": "alternative rock", "target_name": "rock art", "weight": 1.0, "year": 2002}, {"source": "44", "target": "74", "source_name": "alternative rock", "target_name": "united states", "weight": 2.0, "year": 2002}, {"source": "44", "target": "77", "source_name": "alternative rock", "target_name": "rock music", "weight": 3.0, "year": 2002}, {"source": "44", "target": "78", "source_name": "alternative rock", "target_name": "hip hop", "weight": 1.0, "year": 2002}, {"source": "47", "target": "48", "source_name": "hard rock", "target_name": "pop music", "weight": 1.0, "year": 2002}, {"source": "47", "target": "77", "source_name": "hard rock", "target_name": "rock music", "weight": 1.0, "year": 2002}, {"source": "47", "target": "79", "source_name": "hard rock", "target_name": "popular culture", "weight": 1.0, "year": 2002}, {"source": "48", "target": "51", "source_name": "pop music", "target_name": "cultural identity", "weight": 1.0, "year": 2002}, {"source": "48", "target": "52", "source_name": "pop music", "target_name": "folk song", "weight": 1.0, "year": 2002}, {"source": "48", "target": "53", "source_name": "pop music", "target_name": "popular music", "weight": 6.0, "year": 2002}, {"source": "48", "target": "55", "source_name": "pop music", "target_name": "rock criticism", "weight": 2.0, "year": 2002}, {"source": "48", "target": "57", "source_name": "pop music", "target_name": "north america", "weight": 1.0, "year": 2002}, {"source": "48", "target": "60", "source_name": "pop music", "target_name": "cultural studies", "weight": 1.0, "year": 2002}, {"source": "48", "target": "65", "source_name": "pop music", "target_name": "country music", "weight": 1.0, "year": 2002}, {"source": "48", "target": "66", "source_name": "pop music", "target_name": "hong kong", "weight": 2.0, "year": 2002}, {"source": "48", "target": "72", "source_name": "pop music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2002}, {"source": "48", "target": "74", "source_name": "pop music", "target_name": "united states", "weight": 1.0, "year": 2002}, {"source": "48", "target": "77", "source_name": "pop music", "target_name": "rock music", "weight": 3.0, "year": 2002}, {"source": "48", "target": "79", "source_name": "pop music", "target_name": "popular culture", "weight": 1.0, "year": 2002}, {"source": "48", "target": "82", "source_name": "pop music", "target_name": "heavy metal", "weight": 1.0, "year": 2002}, {"source": "49", "target": "53", "source_name": "music theory", "target_name": "popular music", "weight": 1.0, "year": 2002}, {"source": "49", "target": "72", "source_name": "music theory", "target_name": "jimi hendrix", "weight": 1.0, "year": 2002}, {"source": "49", "target": "77", "source_name": "music theory", "target_name": "rock music", "weight": 2.0, "year": 2002}, {"source": "50", "target": "53", "source_name": "hollywood film", "target_name": "popular music", "weight": 1.0, "year": 2002}, {"source": "50", "target": "79", "source_name": "hollywood film", "target_name": "popular culture", "weight": 1.0, "year": 2002}, {"source": "51", "target": "52", "source_name": "cultural identity", "target_name": "folk song", "weight": 1.0, "year": 2002}, {"source": "51", "target": "53", "source_name": "cultural identity", "target_name": "popular music", "weight": 1.0, "year": 2002}, {"source": "51", "target": "60", "source_name": "cultural identity", "target_name": "cultural studies", "weight": 2.0, "year": 2002}, {"source": "51", "target": "66", "source_name": "cultural identity", "target_name": "hong kong", "weight": 1.0, "year": 2002}, {"source": "51", "target": "77", "source_name": "cultural identity", "target_name": "rock music", "weight": 3.0, "year": 2002}, {"source": "51", "target": "79", "source_name": "cultural identity", "target_name": "popular culture", "weight": 1.0, "year": 2002}, {"source": "52", "target": "53", "source_name": "folk song", "target_name": "popular music", "weight": 3.0, "year": 2002}, {"source": "52", "target": "66", "source_name": "folk song", "target_name": "hong kong", "weight": 1.0, "year": 2002}, {"source": "52", "target": "69", "source_name": "folk song", "target_name": "classical music", "weight": 1.0, "year": 2002}, {"source": "52", "target": "77", "source_name": "folk song", "target_name": "rock music", "weight": 1.0, "year": 2002}, {"source": "52", "target": "80", "source_name": "folk song", "target_name": "folk music", "weight": 1.0, "year": 2002}, {"source": "53", "target": "54", "source_name": "popular music", "target_name": "american popular music", "weight": 2.0, "year": 2002}, {"source": "53", "target": "55", "source_name": "popular music", "target_name": "rock criticism", "weight": 1.0, "year": 2002}, {"source": "53", "target": "56", "source_name": "popular music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2002}, {"source": "53", "target": "57", "source_name": "popular music", "target_name": "north america", "weight": 2.0, "year": 2002}, {"source": "53", "target": "58", "source_name": "popular music", "target_name": "music therapy", "weight": 1.0, "year": 2002}, {"source": "53", "target": "59", "source_name": "popular music", "target_name": "college students", "weight": 1.0, "year": 2002}, {"source": "53", "target": "60", "source_name": "popular music", "target_name": "cultural studies", "weight": 2.0, "year": 2002}, {"source": "53", "target": "61", "source_name": "popular music", "target_name": "progressive rock", "weight": 2.0, "year": 2002}, {"source": "53", "target": "65", "source_name": "popular music", "target_name": "country music", "weight": 3.0, "year": 2002}, {"source": "53", "target": "66", "source_name": "popular music", "target_name": "hong kong", "weight": 1.0, "year": 2002}, {"source": "53", "target": "67", "source_name": "popular music", "target_name": "rock art", "weight": 1.0, "year": 2002}, {"source": "53", "target": "69", "source_name": "popular music", "target_name": "classical music", "weight": 4.0, "year": 2002}, {"source": "53", "target": "70", "source_name": "popular music", "target_name": "world war", "weight": 1.0, "year": 2002}, {"source": "53", "target": "71", "source_name": "popular music", "target_name": "latin american", "weight": 1.0, "year": 2002}, {"source": "53", "target": "72", "source_name": "popular music", "target_name": "jimi hendrix", "weight": 3.0, "year": 2002}, {"source": "53", "target": "74", "source_name": "popular music", "target_name": "united states", "weight": 5.0, "year": 2002}, {"source": "53", "target": "75", "source_name": "popular music", "target_name": "world war ii", "weight": 2.0, "year": 2002}, {"source": "53", "target": "76", "source_name": "popular music", "target_name": "los angeles", "weight": 2.0, "year": 2002}, {"source": "53", "target": "77", "source_name": "popular music", "target_name": "rock music", "weight": 19.0, "year": 2002}, {"source": "53", "target": "78", "source_name": "popular music", "target_name": "hip hop", "weight": 2.0, "year": 2002}, {"source": "53", "target": "79", "source_name": "popular music", "target_name": "popular culture", "weight": 5.0, "year": 2002}, {"source": "53", "target": "80", "source_name": "popular music", "target_name": "folk music", "weight": 1.0, "year": 2002}, {"source": "53", "target": "82", "source_name": "popular music", "target_name": "heavy metal", "weight": 3.0, "year": 2002}, {"source": "53", "target": "83", "source_name": "popular music", "target_name": "folk rock", "weight": 1.0, "year": 2002}, {"source": "54", "target": "69", "source_name": "american popular music", "target_name": "classical music", "weight": 1.0, "year": 2002}, {"source": "54", "target": "71", "source_name": "american popular music", "target_name": "latin american", "weight": 1.0, "year": 2002}, {"source": "54", "target": "74", "source_name": "american popular music", "target_name": "united states", "weight": 1.0, "year": 2002}, {"source": "54", "target": "76", "source_name": "american popular music", "target_name": "los angeles", "weight": 1.0, "year": 2002}, {"source": "54", "target": "79", "source_name": "american popular music", "target_name": "popular culture", "weight": 1.0, "year": 2002}, {"source": "55", "target": "57", "source_name": "rock criticism", "target_name": "north america", "weight": 1.0, "year": 2002}, {"source": "55", "target": "61", "source_name": "rock criticism", "target_name": "progressive rock", "weight": 1.0, "year": 2002}, {"source": "55", "target": "65", "source_name": "rock criticism", "target_name": "country music", "weight": 1.0, "year": 2002}, {"source": "55", "target": "77", "source_name": "rock criticism", "target_name": "rock music", "weight": 1.0, "year": 2002}, {"source": "56", "target": "72", "source_name": "bruce springsteen", "target_name": "jimi hendrix", "weight": 1.0, "year": 2002}, {"source": "56", "target": "77", "source_name": "bruce springsteen", "target_name": "rock music", "weight": 2.0, "year": 2002}, {"source": "56", "target": "79", "source_name": "bruce springsteen", "target_name": "popular culture", "weight": 1.0, "year": 2002}, {"source": "57", "target": "65", "source_name": "north america", "target_name": "country music", "weight": 1.0, "year": 2002}, {"source": "57", "target": "74", "source_name": "north america", "target_name": "united states", "weight": 2.0, "year": 2002}, {"source": "57", "target": "77", "source_name": "north america", "target_name": "rock music", "weight": 1.0, "year": 2002}, {"source": "57", "target": "78", "source_name": "north america", "target_name": "hip hop", "weight": 1.0, "year": 2002}, {"source": "58", "target": "77", "source_name": "music therapy", "target_name": "rock music", "weight": 3.0, "year": 2002}, {"source": "59", "target": "74", "source_name": "college students", "target_name": "united states", "weight": 1.0, "year": 2002}, {"source": "60", "target": "71", "source_name": "cultural studies", "target_name": "latin american", "weight": 1.0, "year": 2002}, {"source": "60", "target": "77", "source_name": "cultural studies", "target_name": "rock music", "weight": 3.0, "year": 2002}, {"source": "60", "target": "79", "source_name": "cultural studies", "target_name": "popular culture", "weight": 2.0, "year": 2002}, {"source": "61", "target": "69", "source_name": "progressive rock", "target_name": "classical music", "weight": 2.0, "year": 2002}, {"source": "61", "target": "72", "source_name": "progressive rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2002}, {"source": "61", "target": "74", "source_name": "progressive rock", "target_name": "united states", "weight": 1.0, "year": 2002}, {"source": "61", "target": "77", "source_name": "progressive rock", "target_name": "rock music", "weight": 5.0, "year": 2002}, {"source": "61", "target": "82", "source_name": "progressive rock", "target_name": "heavy metal", "weight": 1.0, "year": 2002}, {"source": "65", "target": "74", "source_name": "country music", "target_name": "united states", "weight": 1.0, "year": 2002}, {"source": "65", "target": "77", "source_name": "country music", "target_name": "rock music", "weight": 2.0, "year": 2002}, {"source": "66", "target": "77", "source_name": "hong kong", "target_name": "rock music", "weight": 2.0, "year": 2002}, {"source": "67", "target": "77", "source_name": "rock art", "target_name": "rock music", "weight": 1.0, "year": 2002}, {"source": "68", "target": "77", "source_name": "hearing loss", "target_name": "rock music", "weight": 2.0, "year": 2002}, {"source": "69", "target": "71", "source_name": "classical music", "target_name": "latin american", "weight": 1.0, "year": 2002}, {"source": "69", "target": "72", "source_name": "classical music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2002}, {"source": "69", "target": "74", "source_name": "classical music", "target_name": "united states", "weight": 2.0, "year": 2002}, {"source": "69", "target": "76", "source_name": "classical music", "target_name": "los angeles", "weight": 1.0, "year": 2002}, {"source": "69", "target": "77", "source_name": "classical music", "target_name": "rock music", "weight": 3.0, "year": 2002}, {"source": "69", "target": "79", "source_name": "classical music", "target_name": "popular culture", "weight": 1.0, "year": 2002}, {"source": "69", "target": "89", "source_name": "classical music", "target_name": "electronic music", "weight": 1.0, "year": 2002}, {"source": "70", "target": "75", "source_name": "world war", "target_name": "world war ii", "weight": 1.0, "year": 2002}, {"source": "70", "target": "77", "source_name": "world war", "target_name": "rock music", "weight": 2.0, "year": 2002}, {"source": "70", "target": "89", "source_name": "world war", "target_name": "electronic music", "weight": 1.0, "year": 2002}, {"source": "71", "target": "74", "source_name": "latin american", "target_name": "united states", "weight": 1.0, "year": 2002}, {"source": "71", "target": "76", "source_name": "latin american", "target_name": "los angeles", "weight": 1.0, "year": 2002}, {"source": "71", "target": "77", "source_name": "latin american", "target_name": "rock music", "weight": 1.0, "year": 2002}, {"source": "71", "target": "79", "source_name": "latin american", "target_name": "popular culture", "weight": 1.0, "year": 2002}, {"source": "72", "target": "77", "source_name": "jimi hendrix", "target_name": "rock music", "weight": 3.0, "year": 2002}, {"source": "72", "target": "79", "source_name": "jimi hendrix", "target_name": "popular culture", "weight": 1.0, "year": 2002}, {"source": "72", "target": "89", "source_name": "jimi hendrix", "target_name": "electronic music", "weight": 1.0, "year": 2002}, {"source": "74", "target": "76", "source_name": "united states", "target_name": "los angeles", "weight": 1.0, "year": 2002}, {"source": "74", "target": "77", "source_name": "united states", "target_name": "rock music", "weight": 3.0, "year": 2002}, {"source": "74", "target": "78", "source_name": "united states", "target_name": "hip hop", "weight": 1.0, "year": 2002}, {"source": "74", "target": "79", "source_name": "united states", "target_name": "popular culture", "weight": 1.0, "year": 2002}, {"source": "74", "target": "80", "source_name": "united states", "target_name": "folk music", "weight": 1.0, "year": 2002}, {"source": "76", "target": "79", "source_name": "los angeles", "target_name": "popular culture", "weight": 1.0, "year": 2002}, {"source": "77", "target": "78", "source_name": "rock music", "target_name": "hip hop", "weight": 1.0, "year": 2002}, {"source": "77", "target": "79", "source_name": "rock music", "target_name": "popular culture", "weight": 4.0, "year": 2002}, {"source": "77", "target": "82", "source_name": "rock music", "target_name": "heavy metal", "weight": 3.0, "year": 2002}, {"source": "77", "target": "89", "source_name": "rock music", "target_name": "electronic music", "weight": 1.0, "year": 2002}, {"source": "78", "target": "82", "source_name": "hip hop", "target_name": "heavy metal", "weight": 1.0, "year": 2002}, {"source": "79", "target": "82", "source_name": "popular culture", "target_name": "heavy metal", "weight": 1.0, "year": 2002}]}, {"2003": [{"source": "1", "target": "28", "source_name": "rock star", "target_name": "high school", "weight": 1.0, "year": 2003}, {"source": "1", "target": "77", "source_name": "rock star", "target_name": "rock music", "weight": 1.0, "year": 2003}, {"source": "1", "target": "82", "source_name": "rock star", "target_name": "heavy metal", "weight": 1.0, "year": 2003}, {"source": "3", "target": "79", "source_name": "glam rock", "target_name": "popular culture", "weight": 1.0, "year": 2003}, {"source": "4", "target": "9", "source_name": "gregorian chant", "target_name": "compact disc", "weight": 1.0, "year": 2003}, {"source": "4", "target": "37", "source_name": "gregorian chant", "target_name": "middle ages", "weight": 1.0, "year": 2003}, {"source": "6", "target": "16", "source_name": "elvis presley", "target_name": "bob dylan", "weight": 1.0, "year": 2003}, {"source": "6", "target": "29", "source_name": "elvis presley", "target_name": "rolling stone", "weight": 1.0, "year": 2003}, {"source": "6", "target": "36", "source_name": "elvis presley", "target_name": "music industry", "weight": 1.0, "year": 2003}, {"source": "6", "target": "41", "source_name": "elvis presley", "target_name": "youth culture", "weight": 1.0, "year": 2003}, {"source": "6", "target": "42", "source_name": "elvis presley", "target_name": "simon frith", "weight": 1.0, "year": 2003}, {"source": "6", "target": "48", "source_name": "elvis presley", "target_name": "pop music", "weight": 1.0, "year": 2003}, {"source": "6", "target": "51", "source_name": "elvis presley", "target_name": "cultural identity", "weight": 1.0, "year": 2003}, {"source": "6", "target": "53", "source_name": "elvis presley", "target_name": "popular music", "weight": 2.0, "year": 2003}, {"source": "6", "target": "60", "source_name": "elvis presley", "target_name": "cultural studies", "weight": 1.0, "year": 2003}, {"source": "6", "target": "72", "source_name": "elvis presley", "target_name": "jimi hendrix", "weight": 1.0, "year": 2003}, {"source": "6", "target": "77", "source_name": "elvis presley", "target_name": "rock music", "weight": 1.0, "year": 2003}, {"source": "6", "target": "80", "source_name": "elvis presley", "target_name": "folk music", "weight": 1.0, "year": 2003}, {"source": "7", "target": "34", "source_name": "nineteenth century", "target_name": "mass media", "weight": 1.0, "year": 2003}, {"source": "7", "target": "43", "source_name": "nineteenth century", "target_name": "music education", "weight": 1.0, "year": 2003}, {"source": "7", "target": "52", "source_name": "nineteenth century", "target_name": "folk song", "weight": 1.0, "year": 2003}, {"source": "7", "target": "53", "source_name": "nineteenth century", "target_name": "popular music", "weight": 1.0, "year": 2003}, {"source": "7", "target": "69", "source_name": "nineteenth century", "target_name": "classical music", "weight": 1.0, "year": 2003}, {"source": "8", "target": "20", "source_name": "christian rock", "target_name": "garage rock", "weight": 1.0, "year": 2003}, {"source": "8", "target": "36", "source_name": "christian rock", "target_name": "music industry", "weight": 1.0, "year": 2003}, {"source": "8", "target": "44", "source_name": "christian rock", "target_name": "alternative rock", "weight": 1.0, "year": 2003}, {"source": "8", "target": "53", "source_name": "christian rock", "target_name": "popular music", "weight": 2.0, "year": 2003}, {"source": "8", "target": "57", "source_name": "christian rock", "target_name": "north america", "weight": 1.0, "year": 2003}, {"source": "8", "target": "65", "source_name": "christian rock", "target_name": "country music", "weight": 1.0, "year": 2003}, {"source": "8", "target": "73", "source_name": "christian rock", "target_name": "southern rock", "weight": 1.0, "year": 2003}, {"source": "8", "target": "77", "source_name": "christian rock", "target_name": "rock music", "weight": 1.0, "year": 2003}, {"source": "8", "target": "79", "source_name": "christian rock", "target_name": "popular culture", "weight": 1.0, "year": 2003}, {"source": "8", "target": "80", "source_name": "christian rock", "target_name": "folk music", "weight": 1.0, "year": 2003}, {"source": "9", "target": "36", "source_name": "compact disc", "target_name": "music industry", "weight": 1.0, "year": 2003}, {"source": "9", "target": "37", "source_name": "compact disc", "target_name": "middle ages", "weight": 1.0, "year": 2003}, {"source": "9", "target": "53", "source_name": "compact disc", "target_name": "popular music", "weight": 1.0, "year": 2003}, {"source": "9", "target": "79", "source_name": "compact disc", "target_name": "popular culture", "weight": 1.0, "year": 2003}, {"source": "10", "target": "15", "source_name": "african american", "target_name": "musical theatre", "weight": 1.0, "year": 2003}, {"source": "10", "target": "53", "source_name": "african american", "target_name": "popular music", "weight": 1.0, "year": 2003}, {"source": "11", "target": "23", "source_name": "south africa", "target_name": "electronic dance music", "weight": 1.0, "year": 2003}, {"source": "11", "target": "36", "source_name": "south africa", "target_name": "music industry", "weight": 1.0, "year": 2003}, {"source": "11", "target": "53", "source_name": "south africa", "target_name": "popular music", "weight": 1.0, "year": 2003}, {"source": "11", "target": "74", "source_name": "south africa", "target_name": "united states", "weight": 2.0, "year": 2003}, {"source": "11", "target": "88", "source_name": "south africa", "target_name": "oxford university press", "weight": 1.0, "year": 2003}, {"source": "12", "target": "15", "source_name": "rock opera", "target_name": "musical theatre", "weight": 1.0, "year": 2003}, {"source": "16", "target": "29", "source_name": "bob dylan", "target_name": "rolling stone", "weight": 1.0, "year": 2003}, {"source": "16", "target": "36", "source_name": "bob dylan", "target_name": "music industry", "weight": 1.0, "year": 2003}, {"source": "16", "target": "42", "source_name": "bob dylan", "target_name": "simon frith", "weight": 1.0, "year": 2003}, {"source": "16", "target": "48", "source_name": "bob dylan", "target_name": "pop music", "weight": 1.0, "year": 2003}, {"source": "16", "target": "53", "source_name": "bob dylan", "target_name": "popular music", "weight": 2.0, "year": 2003}, {"source": "16", "target": "69", "source_name": "bob dylan", "target_name": "classical music", "weight": 1.0, "year": 2003}, {"source": "16", "target": "72", "source_name": "bob dylan", "target_name": "jimi hendrix", "weight": 1.0, "year": 2003}, {"source": "17", "target": "41", "source_name": "civil rights", "target_name": "youth culture", "weight": 1.0, "year": 2003}, {"source": "17", "target": "53", "source_name": "civil rights", "target_name": "popular music", "weight": 1.0, "year": 2003}, {"source": "17", "target": "75", "source_name": "civil rights", "target_name": "world war ii", "weight": 1.0, "year": 2003}, {"source": "19", "target": "36", "source_name": "music video", "target_name": "music industry", "weight": 1.0, "year": 2003}, {"source": "19", "target": "47", "source_name": "music video", "target_name": "hard rock", "weight": 1.0, "year": 2003}, {"source": "19", "target": "48", "source_name": "music video", "target_name": "pop music", "weight": 2.0, "year": 2003}, {"source": "19", "target": "53", "source_name": "music video", "target_name": "popular music", "weight": 1.0, "year": 2003}, {"source": "19", "target": "65", "source_name": "music video", "target_name": "country music", "weight": 2.0, "year": 2003}, {"source": "19", "target": "77", "source_name": "music video", "target_name": "rock music", "weight": 4.0, "year": 2003}, {"source": "19", "target": "78", "source_name": "music video", "target_name": "hip hop", "weight": 1.0, "year": 2003}, {"source": "19", "target": "82", "source_name": "music video", "target_name": "heavy metal", "weight": 1.0, "year": 2003}, {"source": "20", "target": "44", "source_name": "garage rock", "target_name": "alternative rock", "weight": 1.0, "year": 2003}, {"source": "20", "target": "53", "source_name": "garage rock", "target_name": "popular music", "weight": 1.0, "year": 2003}, {"source": "20", "target": "57", "source_name": "garage rock", "target_name": "north america", "weight": 1.0, "year": 2003}, {"source": "20", "target": "65", "source_name": "garage rock", "target_name": "country music", "weight": 1.0, "year": 2003}, {"source": "20", "target": "73", "source_name": "garage rock", "target_name": "southern rock", "weight": 1.0, "year": 2003}, {"source": "20", "target": "80", "source_name": "garage rock", "target_name": "folk music", "weight": 1.0, "year": 2003}, {"source": "22", "target": "69", "source_name": "chamber music", "target_name": "classical music", "weight": 1.0, "year": 2003}, {"source": "22", "target": "89", "source_name": "chamber music", "target_name": "electronic music", "weight": 1.0, "year": 2003}, {"source": "23", "target": "42", "source_name": "electronic dance music", "target_name": "simon frith", "weight": 1.0, "year": 2003}, {"source": "23", "target": "53", "source_name": "electronic dance music", "target_name": "popular music", "weight": 3.0, "year": 2003}, {"source": "23", "target": "60", "source_name": "electronic dance music", "target_name": "cultural studies", "weight": 1.0, "year": 2003}, {"source": "23", "target": "76", "source_name": "electronic dance music", "target_name": "los angeles", "weight": 1.0, "year": 2003}, {"source": "23", "target": "79", "source_name": "electronic dance music", "target_name": "popular culture", "weight": 1.0, "year": 2003}, {"source": "24", "target": "48", "source_name": "punk rock", "target_name": "pop music", "weight": 1.0, "year": 2003}, {"source": "24", "target": "53", "source_name": "punk rock", "target_name": "popular music", "weight": 2.0, "year": 2003}, {"source": "24", "target": "77", "source_name": "punk rock", "target_name": "rock music", "weight": 1.0, "year": 2003}, {"source": "24", "target": "78", "source_name": "punk rock", "target_name": "hip hop", "weight": 1.0, "year": 2003}, {"source": "24", "target": "82", "source_name": "punk rock", "target_name": "heavy metal", "weight": 1.0, "year": 2003}, {"source": "25", "target": "53", "source_name": "russian rock", "target_name": "popular music", "weight": 1.0, "year": 2003}, {"source": "25", "target": "77", "source_name": "russian rock", "target_name": "rock music", "weight": 1.0, "year": 2003}, {"source": "28", "target": "37", "source_name": "high school", "target_name": "middle ages", "weight": 1.0, "year": 2003}, {"source": "28", "target": "77", "source_name": "high school", "target_name": "rock music", "weight": 2.0, "year": 2003}, {"source": "28", "target": "82", "source_name": "high school", "target_name": "heavy metal", "weight": 1.0, "year": 2003}, {"source": "29", "target": "36", "source_name": "rolling stone", "target_name": "music industry", "weight": 1.0, "year": 2003}, {"source": "29", "target": "42", "source_name": "rolling stone", "target_name": "simon frith", "weight": 1.0, "year": 2003}, {"source": "29", "target": "48", "source_name": "rolling stone", "target_name": "pop music", "weight": 1.0, "year": 2003}, {"source": "29", "target": "53", "source_name": "rolling stone", "target_name": "popular music", "weight": 1.0, "year": 2003}, {"source": "29", "target": "56", "source_name": "rolling stone", "target_name": "bruce springsteen", "weight": 1.0, "year": 2003}, {"source": "29", "target": "72", "source_name": "rolling stone", "target_name": "jimi hendrix", "weight": 1.0, "year": 2003}, {"source": "29", "target": "77", "source_name": "rolling stone", "target_name": "rock music", "weight": 1.0, "year": 2003}, {"source": "30", "target": "36", "source_name": "rock band", "target_name": "music industry", "weight": 1.0, "year": 2003}, {"source": "30", "target": "53", "source_name": "rock band", "target_name": "popular music", "weight": 4.0, "year": 2003}, {"source": "30", "target": "61", "source_name": "rock band", "target_name": "progressive rock", "weight": 3.0, "year": 2003}, {"source": "30", "target": "65", "source_name": "rock band", "target_name": "country music", "weight": 1.0, "year": 2003}, {"source": "30", "target": "69", "source_name": "rock band", "target_name": "classical music", "weight": 1.0, "year": 2003}, {"source": "30", "target": "72", "source_name": "rock band", "target_name": "jimi hendrix", "weight": 1.0, "year": 2003}, {"source": "30", "target": "73", "source_name": "rock band", "target_name": "southern rock", "weight": 1.0, "year": 2003}, {"source": "30", "target": "74", "source_name": "rock band", "target_name": "united states", "weight": 1.0, "year": 2003}, {"source": "30", "target": "77", "source_name": "rock band", "target_name": "rock music", "weight": 5.0, "year": 2003}, {"source": "30", "target": "80", "source_name": "rock band", "target_name": "folk music", "weight": 1.0, "year": 2003}, {"source": "30", "target": "82", "source_name": "rock band", "target_name": "heavy metal", "weight": 1.0, "year": 2003}, {"source": "34", "target": "40", "source_name": "mass media", "target_name": "musical instruments", "weight": 1.0, "year": 2003}, {"source": "34", "target": "48", "source_name": "mass media", "target_name": "pop music", "weight": 1.0, "year": 2003}, {"source": "34", "target": "51", "source_name": "mass media", "target_name": "cultural identity", "weight": 1.0, "year": 2003}, {"source": "34", "target": "52", "source_name": "mass media", "target_name": "folk song", "weight": 2.0, "year": 2003}, {"source": "34", "target": "53", "source_name": "mass media", "target_name": "popular music", "weight": 3.0, "year": 2003}, {"source": "34", "target": "66", "source_name": "mass media", "target_name": "hong kong", "weight": 1.0, "year": 2003}, {"source": "34", "target": "69", "source_name": "mass media", "target_name": "classical music", "weight": 1.0, "year": 2003}, {"source": "34", "target": "77", "source_name": "mass media", "target_name": "rock music", "weight": 1.0, "year": 2003}, {"source": "36", "target": "42", "source_name": "music industry", "target_name": "simon frith", "weight": 1.0, "year": 2003}, {"source": "36", "target": "43", "source_name": "music industry", "target_name": "music education", "weight": 1.0, "year": 2003}, {"source": "36", "target": "48", "source_name": "music industry", "target_name": "pop music", "weight": 2.0, "year": 2003}, {"source": "36", "target": "53", "source_name": "music industry", "target_name": "popular music", "weight": 10.0, "year": 2003}, {"source": "36", "target": "61", "source_name": "music industry", "target_name": "progressive rock", "weight": 1.0, "year": 2003}, {"source": "36", "target": "65", "source_name": "music industry", "target_name": "country music", "weight": 1.0, "year": 2003}, {"source": "36", "target": "68", "source_name": "music industry", "target_name": "hearing loss", "weight": 1.0, "year": 2003}, {"source": "36", "target": "69", "source_name": "music industry", "target_name": "classical music", "weight": 1.0, "year": 2003}, {"source": "36", "target": "72", "source_name": "music industry", "target_name": "jimi hendrix", "weight": 2.0, "year": 2003}, {"source": "36", "target": "74", "source_name": "music industry", "target_name": "united states", "weight": 1.0, "year": 2003}, {"source": "36", "target": "77", "source_name": "music industry", "target_name": "rock music", "weight": 5.0, "year": 2003}, {"source": "36", "target": "78", "source_name": "music industry", "target_name": "hip hop", "weight": 1.0, "year": 2003}, {"source": "36", "target": "79", "source_name": "music industry", "target_name": "popular culture", "weight": 4.0, "year": 2003}, {"source": "36", "target": "83", "source_name": "music industry", "target_name": "folk rock", "weight": 1.0, "year": 2003}, {"source": "37", "target": "58", "source_name": "middle ages", "target_name": "music therapy", "weight": 1.0, "year": 2003}, {"source": "37", "target": "69", "source_name": "middle ages", "target_name": "classical music", "weight": 1.0, "year": 2003}, {"source": "37", "target": "77", "source_name": "middle ages", "target_name": "rock music", "weight": 1.0, "year": 2003}, {"source": "37", "target": "80", "source_name": "middle ages", "target_name": "folk music", "weight": 2.0, "year": 2003}, {"source": "40", "target": "49", "source_name": "musical instruments", "target_name": "music theory", "weight": 1.0, "year": 2003}, {"source": "40", "target": "70", "source_name": "musical instruments", "target_name": "world war", "weight": 1.0, "year": 2003}, {"source": "40", "target": "75", "source_name": "musical instruments", "target_name": "world war ii", "weight": 1.0, "year": 2003}, {"source": "40", "target": "89", "source_name": "musical instruments", "target_name": "electronic music", "weight": 1.0, "year": 2003}, {"source": "41", "target": "48", "source_name": "youth culture", "target_name": "pop music", "weight": 1.0, "year": 2003}, {"source": "41", "target": "51", "source_name": "youth culture", "target_name": "cultural identity", "weight": 1.0, "year": 2003}, {"source": "41", "target": "53", "source_name": "youth culture", "target_name": "popular music", "weight": 1.0, "year": 2003}, {"source": "41", "target": "60", "source_name": "youth culture", "target_name": "cultural studies", "weight": 2.0, "year": 2003}, {"source": "41", "target": "75", "source_name": "youth culture", "target_name": "world war ii", "weight": 1.0, "year": 2003}, {"source": "41", "target": "77", "source_name": "youth culture", "target_name": "rock music", "weight": 1.0, "year": 2003}, {"source": "42", "target": "48", "source_name": "simon frith", "target_name": "pop music", "weight": 4.0, "year": 2003}, {"source": "42", "target": "51", "source_name": "simon frith", "target_name": "cultural identity", "weight": 1.0, "year": 2003}, {"source": "42", "target": "53", "source_name": "simon frith", "target_name": "popular music", "weight": 4.0, "year": 2003}, {"source": "42", "target": "55", "source_name": "simon frith", "target_name": "rock criticism", "weight": 2.0, "year": 2003}, {"source": "42", "target": "57", "source_name": "simon frith", "target_name": "north america", "weight": 1.0, "year": 2003}, {"source": "42", "target": "60", "source_name": "simon frith", "target_name": "cultural studies", "weight": 1.0, "year": 2003}, {"source": "42", "target": "65", "source_name": "simon frith", "target_name": "country music", "weight": 1.0, "year": 2003}, {"source": "42", "target": "72", "source_name": "simon frith", "target_name": "jimi hendrix", "weight": 1.0, "year": 2003}, {"source": "42", "target": "76", "source_name": "simon frith", "target_name": "los angeles", "weight": 1.0, "year": 2003}, {"source": "42", "target": "77", "source_name": "simon frith", "target_name": "rock music", "weight": 1.0, "year": 2003}, {"source": "42", "target": "79", "source_name": "simon frith", "target_name": "popular culture", "weight": 1.0, "year": 2003}, {"source": "43", "target": "53", "source_name": "music education", "target_name": "popular music", "weight": 3.0, "year": 2003}, {"source": "43", "target": "77", "source_name": "music education", "target_name": "rock music", "weight": 1.0, "year": 2003}, {"source": "43", "target": "80", "source_name": "music education", "target_name": "folk music", "weight": 2.0, "year": 2003}, {"source": "44", "target": "53", "source_name": "alternative rock", "target_name": "popular music", "weight": 5.0, "year": 2003}, {"source": "44", "target": "57", "source_name": "alternative rock", "target_name": "north america", "weight": 3.0, "year": 2003}, {"source": "44", "target": "65", "source_name": "alternative rock", "target_name": "country music", "weight": 2.0, "year": 2003}, {"source": "44", "target": "67", "source_name": "alternative rock", "target_name": "rock art", "weight": 1.0, "year": 2003}, {"source": "44", "target": "73", "source_name": "alternative rock", "target_name": "southern rock", "weight": 1.0, "year": 2003}, {"source": "44", "target": "74", "source_name": "alternative rock", "target_name": "united states", "weight": 2.0, "year": 2003}, {"source": "44", "target": "77", "source_name": "alternative rock", "target_name": "rock music", "weight": 3.0, "year": 2003}, {"source": "44", "target": "78", "source_name": "alternative rock", "target_name": "hip hop", "weight": 1.0, "year": 2003}, {"source": "44", "target": "80", "source_name": "alternative rock", "target_name": "folk music", "weight": 1.0, "year": 2003}, {"source": "47", "target": "48", "source_name": "hard rock", "target_name": "pop music", "weight": 1.0, "year": 2003}, {"source": "47", "target": "77", "source_name": "hard rock", "target_name": "rock music", "weight": 1.0, "year": 2003}, {"source": "47", "target": "79", "source_name": "hard rock", "target_name": "popular culture", "weight": 1.0, "year": 2003}, {"source": "48", "target": "51", "source_name": "pop music", "target_name": "cultural identity", "weight": 1.0, "year": 2003}, {"source": "48", "target": "52", "source_name": "pop music", "target_name": "folk song", "weight": 1.0, "year": 2003}, {"source": "48", "target": "53", "source_name": "pop music", "target_name": "popular music", "weight": 9.0, "year": 2003}, {"source": "48", "target": "55", "source_name": "pop music", "target_name": "rock criticism", "weight": 2.0, "year": 2003}, {"source": "48", "target": "57", "source_name": "pop music", "target_name": "north america", "weight": 1.0, "year": 2003}, {"source": "48", "target": "60", "source_name": "pop music", "target_name": "cultural studies", "weight": 1.0, "year": 2003}, {"source": "48", "target": "65", "source_name": "pop music", "target_name": "country music", "weight": 1.0, "year": 2003}, {"source": "48", "target": "66", "source_name": "pop music", "target_name": "hong kong", "weight": 2.0, "year": 2003}, {"source": "48", "target": "72", "source_name": "pop music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2003}, {"source": "48", "target": "74", "source_name": "pop music", "target_name": "united states", "weight": 1.0, "year": 2003}, {"source": "48", "target": "77", "source_name": "pop music", "target_name": "rock music", "weight": 5.0, "year": 2003}, {"source": "48", "target": "78", "source_name": "pop music", "target_name": "hip hop", "weight": 1.0, "year": 2003}, {"source": "48", "target": "79", "source_name": "pop music", "target_name": "popular culture", "weight": 2.0, "year": 2003}, {"source": "48", "target": "82", "source_name": "pop music", "target_name": "heavy metal", "weight": 1.0, "year": 2003}, {"source": "49", "target": "53", "source_name": "music theory", "target_name": "popular music", "weight": 1.0, "year": 2003}, {"source": "49", "target": "57", "source_name": "music theory", "target_name": "north america", "weight": 1.0, "year": 2003}, {"source": "49", "target": "72", "source_name": "music theory", "target_name": "jimi hendrix", "weight": 1.0, "year": 2003}, {"source": "49", "target": "77", "source_name": "music theory", "target_name": "rock music", "weight": 2.0, "year": 2003}, {"source": "50", "target": "53", "source_name": "hollywood film", "target_name": "popular music", "weight": 1.0, "year": 2003}, {"source": "50", "target": "79", "source_name": "hollywood film", "target_name": "popular culture", "weight": 1.0, "year": 2003}, {"source": "51", "target": "52", "source_name": "cultural identity", "target_name": "folk song", "weight": 1.0, "year": 2003}, {"source": "51", "target": "53", "source_name": "cultural identity", "target_name": "popular music", "weight": 1.0, "year": 2003}, {"source": "51", "target": "60", "source_name": "cultural identity", "target_name": "cultural studies", "weight": 2.0, "year": 2003}, {"source": "51", "target": "66", "source_name": "cultural identity", "target_name": "hong kong", "weight": 1.0, "year": 2003}, {"source": "51", "target": "77", "source_name": "cultural identity", "target_name": "rock music", "weight": 3.0, "year": 2003}, {"source": "51", "target": "79", "source_name": "cultural identity", "target_name": "popular culture", "weight": 1.0, "year": 2003}, {"source": "52", "target": "53", "source_name": "folk song", "target_name": "popular music", "weight": 3.0, "year": 2003}, {"source": "52", "target": "66", "source_name": "folk song", "target_name": "hong kong", "weight": 1.0, "year": 2003}, {"source": "52", "target": "69", "source_name": "folk song", "target_name": "classical music", "weight": 1.0, "year": 2003}, {"source": "52", "target": "77", "source_name": "folk song", "target_name": "rock music", "weight": 1.0, "year": 2003}, {"source": "52", "target": "80", "source_name": "folk song", "target_name": "folk music", "weight": 1.0, "year": 2003}, {"source": "53", "target": "54", "source_name": "popular music", "target_name": "american popular music", "weight": 2.0, "year": 2003}, {"source": "53", "target": "55", "source_name": "popular music", "target_name": "rock criticism", "weight": 1.0, "year": 2003}, {"source": "53", "target": "56", "source_name": "popular music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2003}, {"source": "53", "target": "57", "source_name": "popular music", "target_name": "north america", "weight": 3.0, "year": 2003}, {"source": "53", "target": "58", "source_name": "popular music", "target_name": "music therapy", "weight": 1.0, "year": 2003}, {"source": "53", "target": "59", "source_name": "popular music", "target_name": "college students", "weight": 1.0, "year": 2003}, {"source": "53", "target": "60", "source_name": "popular music", "target_name": "cultural studies", "weight": 3.0, "year": 2003}, {"source": "53", "target": "61", "source_name": "popular music", "target_name": "progressive rock", "weight": 3.0, "year": 2003}, {"source": "53", "target": "62", "source_name": "popular music", "target_name": "led zeppelin", "weight": 1.0, "year": 2003}, {"source": "53", "target": "65", "source_name": "popular music", "target_name": "country music", "weight": 4.0, "year": 2003}, {"source": "53", "target": "66", "source_name": "popular music", "target_name": "hong kong", "weight": 1.0, "year": 2003}, {"source": "53", "target": "67", "source_name": "popular music", "target_name": "rock art", "weight": 1.0, "year": 2003}, {"source": "53", "target": "69", "source_name": "popular music", "target_name": "classical music", "weight": 4.0, "year": 2003}, {"source": "53", "target": "70", "source_name": "popular music", "target_name": "world war", "weight": 1.0, "year": 2003}, {"source": "53", "target": "71", "source_name": "popular music", "target_name": "latin american", "weight": 1.0, "year": 2003}, {"source": "53", "target": "72", "source_name": "popular music", "target_name": "jimi hendrix", "weight": 3.0, "year": 2003}, {"source": "53", "target": "73", "source_name": "popular music", "target_name": "southern rock", "weight": 1.0, "year": 2003}, {"source": "53", "target": "74", "source_name": "popular music", "target_name": "united states", "weight": 5.0, "year": 2003}, {"source": "53", "target": "75", "source_name": "popular music", "target_name": "world war ii", "weight": 2.0, "year": 2003}, {"source": "53", "target": "76", "source_name": "popular music", "target_name": "los angeles", "weight": 2.0, "year": 2003}, {"source": "53", "target": "77", "source_name": "popular music", "target_name": "rock music", "weight": 27.0, "year": 2003}, {"source": "53", "target": "78", "source_name": "popular music", "target_name": "hip hop", "weight": 3.0, "year": 2003}, {"source": "53", "target": "79", "source_name": "popular music", "target_name": "popular culture", "weight": 8.0, "year": 2003}, {"source": "53", "target": "80", "source_name": "popular music", "target_name": "folk music", "weight": 2.0, "year": 2003}, {"source": "53", "target": "82", "source_name": "popular music", "target_name": "heavy metal", "weight": 3.0, "year": 2003}, {"source": "53", "target": "83", "source_name": "popular music", "target_name": "folk rock", "weight": 1.0, "year": 2003}, {"source": "53", "target": "88", "source_name": "popular music", "target_name": "oxford university press", "weight": 1.0, "year": 2003}, {"source": "53", "target": "89", "source_name": "popular music", "target_name": "electronic music", "weight": 1.0, "year": 2003}, {"source": "54", "target": "69", "source_name": "american popular music", "target_name": "classical music", "weight": 1.0, "year": 2003}, {"source": "54", "target": "71", "source_name": "american popular music", "target_name": "latin american", "weight": 1.0, "year": 2003}, {"source": "54", "target": "74", "source_name": "american popular music", "target_name": "united states", "weight": 1.0, "year": 2003}, {"source": "54", "target": "76", "source_name": "american popular music", "target_name": "los angeles", "weight": 1.0, "year": 2003}, {"source": "54", "target": "79", "source_name": "american popular music", "target_name": "popular culture", "weight": 1.0, "year": 2003}, {"source": "55", "target": "57", "source_name": "rock criticism", "target_name": "north america", "weight": 1.0, "year": 2003}, {"source": "55", "target": "61", "source_name": "rock criticism", "target_name": "progressive rock", "weight": 1.0, "year": 2003}, {"source": "55", "target": "65", "source_name": "rock criticism", "target_name": "country music", "weight": 1.0, "year": 2003}, {"source": "55", "target": "77", "source_name": "rock criticism", "target_name": "rock music", "weight": 1.0, "year": 2003}, {"source": "56", "target": "72", "source_name": "bruce springsteen", "target_name": "jimi hendrix", "weight": 1.0, "year": 2003}, {"source": "56", "target": "77", "source_name": "bruce springsteen", "target_name": "rock music", "weight": 2.0, "year": 2003}, {"source": "56", "target": "79", "source_name": "bruce springsteen", "target_name": "popular culture", "weight": 1.0, "year": 2003}, {"source": "57", "target": "65", "source_name": "north america", "target_name": "country music", "weight": 2.0, "year": 2003}, {"source": "57", "target": "73", "source_name": "north america", "target_name": "southern rock", "weight": 1.0, "year": 2003}, {"source": "57", "target": "74", "source_name": "north america", "target_name": "united states", "weight": 2.0, "year": 2003}, {"source": "57", "target": "77", "source_name": "north america", "target_name": "rock music", "weight": 1.0, "year": 2003}, {"source": "57", "target": "78", "source_name": "north america", "target_name": "hip hop", "weight": 1.0, "year": 2003}, {"source": "57", "target": "80", "source_name": "north america", "target_name": "folk music", "weight": 2.0, "year": 2003}, {"source": "58", "target": "64", "source_name": "music therapy", "target_name": "english language", "weight": 1.0, "year": 2003}, {"source": "58", "target": "77", "source_name": "music therapy", "target_name": "rock music", "weight": 3.0, "year": 2003}, {"source": "59", "target": "74", "source_name": "college students", "target_name": "united states", "weight": 1.0, "year": 2003}, {"source": "60", "target": "62", "source_name": "cultural studies", "target_name": "led zeppelin", "weight": 1.0, "year": 2003}, {"source": "60", "target": "71", "source_name": "cultural studies", "target_name": "latin american", "weight": 1.0, "year": 2003}, {"source": "60", "target": "77", "source_name": "cultural studies", "target_name": "rock music", "weight": 4.0, "year": 2003}, {"source": "60", "target": "79", "source_name": "cultural studies", "target_name": "popular culture", "weight": 2.0, "year": 2003}, {"source": "60", "target": "88", "source_name": "cultural studies", "target_name": "oxford university press", "weight": 1.0, "year": 2003}, {"source": "61", "target": "69", "source_name": "progressive rock", "target_name": "classical music", "weight": 2.0, "year": 2003}, {"source": "61", "target": "72", "source_name": "progressive rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2003}, {"source": "61", "target": "74", "source_name": "progressive rock", "target_name": "united states", "weight": 1.0, "year": 2003}, {"source": "61", "target": "77", "source_name": "progressive rock", "target_name": "rock music", "weight": 6.0, "year": 2003}, {"source": "61", "target": "82", "source_name": "progressive rock", "target_name": "heavy metal", "weight": 1.0, "year": 2003}, {"source": "61", "target": "89", "source_name": "progressive rock", "target_name": "electronic music", "weight": 1.0, "year": 2003}, {"source": "62", "target": "77", "source_name": "led zeppelin", "target_name": "rock music", "weight": 1.0, "year": 2003}, {"source": "62", "target": "88", "source_name": "led zeppelin", "target_name": "oxford university press", "weight": 1.0, "year": 2003}, {"source": "65", "target": "73", "source_name": "country music", "target_name": "southern rock", "weight": 2.0, "year": 2003}, {"source": "65", "target": "74", "source_name": "country music", "target_name": "united states", "weight": 1.0, "year": 2003}, {"source": "65", "target": "77", "source_name": "country music", "target_name": "rock music", "weight": 2.0, "year": 2003}, {"source": "65", "target": "80", "source_name": "country music", "target_name": "folk music", "weight": 1.0, "year": 2003}, {"source": "66", "target": "77", "source_name": "hong kong", "target_name": "rock music", "weight": 2.0, "year": 2003}, {"source": "67", "target": "77", "source_name": "rock art", "target_name": "rock music", "weight": 1.0, "year": 2003}, {"source": "68", "target": "77", "source_name": "hearing loss", "target_name": "rock music", "weight": 2.0, "year": 2003}, {"source": "69", "target": "71", "source_name": "classical music", "target_name": "latin american", "weight": 1.0, "year": 2003}, {"source": "69", "target": "72", "source_name": "classical music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2003}, {"source": "69", "target": "74", "source_name": "classical music", "target_name": "united states", "weight": 2.0, "year": 2003}, {"source": "69", "target": "76", "source_name": "classical music", "target_name": "los angeles", "weight": 1.0, "year": 2003}, {"source": "69", "target": "77", "source_name": "classical music", "target_name": "rock music", "weight": 6.0, "year": 2003}, {"source": "69", "target": "79", "source_name": "classical music", "target_name": "popular culture", "weight": 1.0, "year": 2003}, {"source": "69", "target": "89", "source_name": "classical music", "target_name": "electronic music", "weight": 1.0, "year": 2003}, {"source": "70", "target": "75", "source_name": "world war", "target_name": "world war ii", "weight": 1.0, "year": 2003}, {"source": "70", "target": "77", "source_name": "world war", "target_name": "rock music", "weight": 2.0, "year": 2003}, {"source": "70", "target": "89", "source_name": "world war", "target_name": "electronic music", "weight": 1.0, "year": 2003}, {"source": "71", "target": "74", "source_name": "latin american", "target_name": "united states", "weight": 1.0, "year": 2003}, {"source": "71", "target": "76", "source_name": "latin american", "target_name": "los angeles", "weight": 1.0, "year": 2003}, {"source": "71", "target": "77", "source_name": "latin american", "target_name": "rock music", "weight": 1.0, "year": 2003}, {"source": "71", "target": "79", "source_name": "latin american", "target_name": "popular culture", "weight": 1.0, "year": 2003}, {"source": "72", "target": "77", "source_name": "jimi hendrix", "target_name": "rock music", "weight": 3.0, "year": 2003}, {"source": "72", "target": "79", "source_name": "jimi hendrix", "target_name": "popular culture", "weight": 1.0, "year": 2003}, {"source": "72", "target": "89", "source_name": "jimi hendrix", "target_name": "electronic music", "weight": 1.0, "year": 2003}, {"source": "73", "target": "80", "source_name": "southern rock", "target_name": "folk music", "weight": 1.0, "year": 2003}, {"source": "74", "target": "76", "source_name": "united states", "target_name": "los angeles", "weight": 1.0, "year": 2003}, {"source": "74", "target": "77", "source_name": "united states", "target_name": "rock music", "weight": 3.0, "year": 2003}, {"source": "74", "target": "78", "source_name": "united states", "target_name": "hip hop", "weight": 1.0, "year": 2003}, {"source": "74", "target": "79", "source_name": "united states", "target_name": "popular culture", "weight": 1.0, "year": 2003}, {"source": "74", "target": "80", "source_name": "united states", "target_name": "folk music", "weight": 1.0, "year": 2003}, {"source": "76", "target": "79", "source_name": "los angeles", "target_name": "popular culture", "weight": 1.0, "year": 2003}, {"source": "77", "target": "78", "source_name": "rock music", "target_name": "hip hop", "weight": 2.0, "year": 2003}, {"source": "77", "target": "79", "source_name": "rock music", "target_name": "popular culture", "weight": 5.0, "year": 2003}, {"source": "77", "target": "82", "source_name": "rock music", "target_name": "heavy metal", "weight": 3.0, "year": 2003}, {"source": "77", "target": "88", "source_name": "rock music", "target_name": "oxford university press", "weight": 1.0, "year": 2003}, {"source": "77", "target": "89", "source_name": "rock music", "target_name": "electronic music", "weight": 2.0, "year": 2003}, {"source": "78", "target": "79", "source_name": "hip hop", "target_name": "popular culture", "weight": 1.0, "year": 2003}, {"source": "78", "target": "82", "source_name": "hip hop", "target_name": "heavy metal", "weight": 1.0, "year": 2003}, {"source": "79", "target": "82", "source_name": "popular culture", "target_name": "heavy metal", "weight": 1.0, "year": 2003}]}, {"2004": [{"source": "1", "target": "28", "source_name": "rock star", "target_name": "high school", "weight": 1.0, "year": 2004}, {"source": "1", "target": "36", "source_name": "rock star", "target_name": "music industry", "weight": 1.0, "year": 2004}, {"source": "1", "target": "41", "source_name": "rock star", "target_name": "youth culture", "weight": 1.0, "year": 2004}, {"source": "1", "target": "48", "source_name": "rock star", "target_name": "pop music", "weight": 1.0, "year": 2004}, {"source": "1", "target": "51", "source_name": "rock star", "target_name": "cultural identity", "weight": 1.0, "year": 2004}, {"source": "1", "target": "53", "source_name": "rock star", "target_name": "popular music", "weight": 1.0, "year": 2004}, {"source": "1", "target": "74", "source_name": "rock star", "target_name": "united states", "weight": 1.0, "year": 2004}, {"source": "1", "target": "77", "source_name": "rock star", "target_name": "rock music", "weight": 3.0, "year": 2004}, {"source": "1", "target": "82", "source_name": "rock star", "target_name": "heavy metal", "weight": 1.0, "year": 2004}, {"source": "3", "target": "79", "source_name": "glam rock", "target_name": "popular culture", "weight": 1.0, "year": 2004}, {"source": "4", "target": "9", "source_name": "gregorian chant", "target_name": "compact disc", "weight": 1.0, "year": 2004}, {"source": "4", "target": "37", "source_name": "gregorian chant", "target_name": "middle ages", "weight": 1.0, "year": 2004}, {"source": "5", "target": "12", "source_name": "jesus christ superstar", "target_name": "rock opera", "weight": 1.0, "year": 2004}, {"source": "5", "target": "15", "source_name": "jesus christ superstar", "target_name": "musical theatre", "weight": 1.0, "year": 2004}, {"source": "5", "target": "33", "source_name": "jesus christ superstar", "target_name": "jesus christ", "weight": 1.0, "year": 2004}, {"source": "5", "target": "53", "source_name": "jesus christ superstar", "target_name": "popular music", "weight": 1.0, "year": 2004}, {"source": "5", "target": "77", "source_name": "jesus christ superstar", "target_name": "rock music", "weight": 1.0, "year": 2004}, {"source": "6", "target": "10", "source_name": "elvis presley", "target_name": "african american", "weight": 1.0, "year": 2004}, {"source": "6", "target": "16", "source_name": "elvis presley", "target_name": "bob dylan", "weight": 1.0, "year": 2004}, {"source": "6", "target": "17", "source_name": "elvis presley", "target_name": "civil rights", "weight": 1.0, "year": 2004}, {"source": "6", "target": "29", "source_name": "elvis presley", "target_name": "rolling stone", "weight": 1.0, "year": 2004}, {"source": "6", "target": "36", "source_name": "elvis presley", "target_name": "music industry", "weight": 1.0, "year": 2004}, {"source": "6", "target": "41", "source_name": "elvis presley", "target_name": "youth culture", "weight": 1.0, "year": 2004}, {"source": "6", "target": "42", "source_name": "elvis presley", "target_name": "simon frith", "weight": 1.0, "year": 2004}, {"source": "6", "target": "48", "source_name": "elvis presley", "target_name": "pop music", "weight": 1.0, "year": 2004}, {"source": "6", "target": "51", "source_name": "elvis presley", "target_name": "cultural identity", "weight": 1.0, "year": 2004}, {"source": "6", "target": "53", "source_name": "elvis presley", "target_name": "popular music", "weight": 2.0, "year": 2004}, {"source": "6", "target": "60", "source_name": "elvis presley", "target_name": "cultural studies", "weight": 1.0, "year": 2004}, {"source": "6", "target": "72", "source_name": "elvis presley", "target_name": "jimi hendrix", "weight": 1.0, "year": 2004}, {"source": "6", "target": "74", "source_name": "elvis presley", "target_name": "united states", "weight": 1.0, "year": 2004}, {"source": "6", "target": "77", "source_name": "elvis presley", "target_name": "rock music", "weight": 1.0, "year": 2004}, {"source": "6", "target": "79", "source_name": "elvis presley", "target_name": "popular culture", "weight": 1.0, "year": 2004}, {"source": "6", "target": "80", "source_name": "elvis presley", "target_name": "folk music", "weight": 1.0, "year": 2004}, {"source": "7", "target": "34", "source_name": "nineteenth century", "target_name": "mass media", "weight": 1.0, "year": 2004}, {"source": "7", "target": "43", "source_name": "nineteenth century", "target_name": "music education", "weight": 1.0, "year": 2004}, {"source": "7", "target": "52", "source_name": "nineteenth century", "target_name": "folk song", "weight": 1.0, "year": 2004}, {"source": "7", "target": "53", "source_name": "nineteenth century", "target_name": "popular music", "weight": 1.0, "year": 2004}, {"source": "7", "target": "69", "source_name": "nineteenth century", "target_name": "classical music", "weight": 1.0, "year": 2004}, {"source": "8", "target": "20", "source_name": "christian rock", "target_name": "garage rock", "weight": 1.0, "year": 2004}, {"source": "8", "target": "36", "source_name": "christian rock", "target_name": "music industry", "weight": 1.0, "year": 2004}, {"source": "8", "target": "44", "source_name": "christian rock", "target_name": "alternative rock", "weight": 1.0, "year": 2004}, {"source": "8", "target": "53", "source_name": "christian rock", "target_name": "popular music", "weight": 2.0, "year": 2004}, {"source": "8", "target": "57", "source_name": "christian rock", "target_name": "north america", "weight": 1.0, "year": 2004}, {"source": "8", "target": "65", "source_name": "christian rock", "target_name": "country music", "weight": 1.0, "year": 2004}, {"source": "8", "target": "73", "source_name": "christian rock", "target_name": "southern rock", "weight": 1.0, "year": 2004}, {"source": "8", "target": "77", "source_name": "christian rock", "target_name": "rock music", "weight": 1.0, "year": 2004}, {"source": "8", "target": "79", "source_name": "christian rock", "target_name": "popular culture", "weight": 1.0, "year": 2004}, {"source": "8", "target": "80", "source_name": "christian rock", "target_name": "folk music", "weight": 1.0, "year": 2004}, {"source": "9", "target": "10", "source_name": "compact disc", "target_name": "african american", "weight": 1.0, "year": 2004}, {"source": "9", "target": "24", "source_name": "compact disc", "target_name": "punk rock", "weight": 1.0, "year": 2004}, {"source": "9", "target": "36", "source_name": "compact disc", "target_name": "music industry", "weight": 1.0, "year": 2004}, {"source": "9", "target": "37", "source_name": "compact disc", "target_name": "middle ages", "weight": 1.0, "year": 2004}, {"source": "9", "target": "53", "source_name": "compact disc", "target_name": "popular music", "weight": 2.0, "year": 2004}, {"source": "9", "target": "74", "source_name": "compact disc", "target_name": "united states", "weight": 1.0, "year": 2004}, {"source": "9", "target": "79", "source_name": "compact disc", "target_name": "popular culture", "weight": 1.0, "year": 2004}, {"source": "9", "target": "80", "source_name": "compact disc", "target_name": "folk music", "weight": 1.0, "year": 2004}, {"source": "10", "target": "15", "source_name": "african american", "target_name": "musical theatre", "weight": 1.0, "year": 2004}, {"source": "10", "target": "17", "source_name": "african american", "target_name": "civil rights", "weight": 1.0, "year": 2004}, {"source": "10", "target": "24", "source_name": "african american", "target_name": "punk rock", "weight": 1.0, "year": 2004}, {"source": "10", "target": "53", "source_name": "african american", "target_name": "popular music", "weight": 2.0, "year": 2004}, {"source": "10", "target": "74", "source_name": "african american", "target_name": "united states", "weight": 2.0, "year": 2004}, {"source": "10", "target": "79", "source_name": "african american", "target_name": "popular culture", "weight": 1.0, "year": 2004}, {"source": "10", "target": "80", "source_name": "african american", "target_name": "folk music", "weight": 1.0, "year": 2004}, {"source": "11", "target": "23", "source_name": "south africa", "target_name": "electronic dance music", "weight": 1.0, "year": 2004}, {"source": "11", "target": "36", "source_name": "south africa", "target_name": "music industry", "weight": 1.0, "year": 2004}, {"source": "11", "target": "53", "source_name": "south africa", "target_name": "popular music", "weight": 1.0, "year": 2004}, {"source": "11", "target": "74", "source_name": "south africa", "target_name": "united states", "weight": 2.0, "year": 2004}, {"source": "11", "target": "88", "source_name": "south africa", "target_name": "oxford university press", "weight": 1.0, "year": 2004}, {"source": "12", "target": "15", "source_name": "rock opera", "target_name": "musical theatre", "weight": 2.0, "year": 2004}, {"source": "12", "target": "33", "source_name": "rock opera", "target_name": "jesus christ", "weight": 1.0, "year": 2004}, {"source": "12", "target": "53", "source_name": "rock opera", "target_name": "popular music", "weight": 1.0, "year": 2004}, {"source": "12", "target": "77", "source_name": "rock opera", "target_name": "rock music", "weight": 1.0, "year": 2004}, {"source": "12", "target": "79", "source_name": "rock opera", "target_name": "popular culture", "weight": 1.0, "year": 2004}, {"source": "15", "target": "33", "source_name": "musical theatre", "target_name": "jesus christ", "weight": 1.0, "year": 2004}, {"source": "15", "target": "53", "source_name": "musical theatre", "target_name": "popular music", "weight": 1.0, "year": 2004}, {"source": "15", "target": "70", "source_name": "musical theatre", "target_name": "world war", "weight": 1.0, "year": 2004}, {"source": "15", "target": "74", "source_name": "musical theatre", "target_name": "united states", "weight": 1.0, "year": 2004}, {"source": "15", "target": "77", "source_name": "musical theatre", "target_name": "rock music", "weight": 1.0, "year": 2004}, {"source": "16", "target": "29", "source_name": "bob dylan", "target_name": "rolling stone", "weight": 1.0, "year": 2004}, {"source": "16", "target": "36", "source_name": "bob dylan", "target_name": "music industry", "weight": 1.0, "year": 2004}, {"source": "16", "target": "42", "source_name": "bob dylan", "target_name": "simon frith", "weight": 1.0, "year": 2004}, {"source": "16", "target": "48", "source_name": "bob dylan", "target_name": "pop music", "weight": 2.0, "year": 2004}, {"source": "16", "target": "53", "source_name": "bob dylan", "target_name": "popular music", "weight": 2.0, "year": 2004}, {"source": "16", "target": "69", "source_name": "bob dylan", "target_name": "classical music", "weight": 1.0, "year": 2004}, {"source": "16", "target": "72", "source_name": "bob dylan", "target_name": "jimi hendrix", "weight": 1.0, "year": 2004}, {"source": "17", "target": "30", "source_name": "civil rights", "target_name": "rock band", "weight": 1.0, "year": 2004}, {"source": "17", "target": "41", "source_name": "civil rights", "target_name": "youth culture", "weight": 1.0, "year": 2004}, {"source": "17", "target": "53", "source_name": "civil rights", "target_name": "popular music", "weight": 2.0, "year": 2004}, {"source": "17", "target": "73", "source_name": "civil rights", "target_name": "southern rock", "weight": 1.0, "year": 2004}, {"source": "17", "target": "74", "source_name": "civil rights", "target_name": "united states", "weight": 1.0, "year": 2004}, {"source": "17", "target": "75", "source_name": "civil rights", "target_name": "world war ii", "weight": 1.0, "year": 2004}, {"source": "17", "target": "77", "source_name": "civil rights", "target_name": "rock music", "weight": 1.0, "year": 2004}, {"source": "17", "target": "79", "source_name": "civil rights", "target_name": "popular culture", "weight": 1.0, "year": 2004}, {"source": "19", "target": "36", "source_name": "music video", "target_name": "music industry", "weight": 1.0, "year": 2004}, {"source": "19", "target": "47", "source_name": "music video", "target_name": "hard rock", "weight": 1.0, "year": 2004}, {"source": "19", "target": "48", "source_name": "music video", "target_name": "pop music", "weight": 2.0, "year": 2004}, {"source": "19", "target": "53", "source_name": "music video", "target_name": "popular music", "weight": 1.0, "year": 2004}, {"source": "19", "target": "65", "source_name": "music video", "target_name": "country music", "weight": 2.0, "year": 2004}, {"source": "19", "target": "77", "source_name": "music video", "target_name": "rock music", "weight": 4.0, "year": 2004}, {"source": "19", "target": "78", "source_name": "music video", "target_name": "hip hop", "weight": 1.0, "year": 2004}, {"source": "19", "target": "82", "source_name": "music video", "target_name": "heavy metal", "weight": 1.0, "year": 2004}, {"source": "20", "target": "44", "source_name": "garage rock", "target_name": "alternative rock", "weight": 1.0, "year": 2004}, {"source": "20", "target": "53", "source_name": "garage rock", "target_name": "popular music", "weight": 1.0, "year": 2004}, {"source": "20", "target": "57", "source_name": "garage rock", "target_name": "north america", "weight": 1.0, "year": 2004}, {"source": "20", "target": "65", "source_name": "garage rock", "target_name": "country music", "weight": 1.0, "year": 2004}, {"source": "20", "target": "73", "source_name": "garage rock", "target_name": "southern rock", "weight": 1.0, "year": 2004}, {"source": "20", "target": "80", "source_name": "garage rock", "target_name": "folk music", "weight": 1.0, "year": 2004}, {"source": "22", "target": "35", "source_name": "chamber music", "target_name": "ancient greek", "weight": 1.0, "year": 2004}, {"source": "22", "target": "65", "source_name": "chamber music", "target_name": "country music", "weight": 1.0, "year": 2004}, {"source": "22", "target": "69", "source_name": "chamber music", "target_name": "classical music", "weight": 1.0, "year": 2004}, {"source": "22", "target": "77", "source_name": "chamber music", "target_name": "rock music", "weight": 1.0, "year": 2004}, {"source": "22", "target": "80", "source_name": "chamber music", "target_name": "folk music", "weight": 1.0, "year": 2004}, {"source": "22", "target": "89", "source_name": "chamber music", "target_name": "electronic music", "weight": 2.0, "year": 2004}, {"source": "23", "target": "42", "source_name": "electronic dance music", "target_name": "simon frith", "weight": 1.0, "year": 2004}, {"source": "23", "target": "53", "source_name": "electronic dance music", "target_name": "popular music", "weight": 3.0, "year": 2004}, {"source": "23", "target": "60", "source_name": "electronic dance music", "target_name": "cultural studies", "weight": 1.0, "year": 2004}, {"source": "23", "target": "76", "source_name": "electronic dance music", "target_name": "los angeles", "weight": 1.0, "year": 2004}, {"source": "23", "target": "79", "source_name": "electronic dance music", "target_name": "popular culture", "weight": 1.0, "year": 2004}, {"source": "24", "target": "42", "source_name": "punk rock", "target_name": "simon frith", "weight": 1.0, "year": 2004}, {"source": "24", "target": "48", "source_name": "punk rock", "target_name": "pop music", "weight": 2.0, "year": 2004}, {"source": "24", "target": "53", "source_name": "punk rock", "target_name": "popular music", "weight": 3.0, "year": 2004}, {"source": "24", "target": "74", "source_name": "punk rock", "target_name": "united states", "weight": 1.0, "year": 2004}, {"source": "24", "target": "77", "source_name": "punk rock", "target_name": "rock music", "weight": 2.0, "year": 2004}, {"source": "24", "target": "78", "source_name": "punk rock", "target_name": "hip hop", "weight": 1.0, "year": 2004}, {"source": "24", "target": "80", "source_name": "punk rock", "target_name": "folk music", "weight": 1.0, "year": 2004}, {"source": "24", "target": "82", "source_name": "punk rock", "target_name": "heavy metal", "weight": 1.0, "year": 2004}, {"source": "25", "target": "53", "source_name": "russian rock", "target_name": "popular music", "weight": 1.0, "year": 2004}, {"source": "25", "target": "77", "source_name": "russian rock", "target_name": "rock music", "weight": 1.0, "year": 2004}, {"source": "28", "target": "37", "source_name": "high school", "target_name": "middle ages", "weight": 1.0, "year": 2004}, {"source": "28", "target": "77", "source_name": "high school", "target_name": "rock music", "weight": 2.0, "year": 2004}, {"source": "28", "target": "82", "source_name": "high school", "target_name": "heavy metal", "weight": 1.0, "year": 2004}, {"source": "29", "target": "36", "source_name": "rolling stone", "target_name": "music industry", "weight": 1.0, "year": 2004}, {"source": "29", "target": "42", "source_name": "rolling stone", "target_name": "simon frith", "weight": 1.0, "year": 2004}, {"source": "29", "target": "48", "source_name": "rolling stone", "target_name": "pop music", "weight": 1.0, "year": 2004}, {"source": "29", "target": "53", "source_name": "rolling stone", "target_name": "popular music", "weight": 1.0, "year": 2004}, {"source": "29", "target": "56", "source_name": "rolling stone", "target_name": "bruce springsteen", "weight": 1.0, "year": 2004}, {"source": "29", "target": "72", "source_name": "rolling stone", "target_name": "jimi hendrix", "weight": 1.0, "year": 2004}, {"source": "29", "target": "77", "source_name": "rolling stone", "target_name": "rock music", "weight": 1.0, "year": 2004}, {"source": "30", "target": "36", "source_name": "rock band", "target_name": "music industry", "weight": 1.0, "year": 2004}, {"source": "30", "target": "53", "source_name": "rock band", "target_name": "popular music", "weight": 6.0, "year": 2004}, {"source": "30", "target": "61", "source_name": "rock band", "target_name": "progressive rock", "weight": 3.0, "year": 2004}, {"source": "30", "target": "65", "source_name": "rock band", "target_name": "country music", "weight": 1.0, "year": 2004}, {"source": "30", "target": "69", "source_name": "rock band", "target_name": "classical music", "weight": 1.0, "year": 2004}, {"source": "30", "target": "72", "source_name": "rock band", "target_name": "jimi hendrix", "weight": 1.0, "year": 2004}, {"source": "30", "target": "73", "source_name": "rock band", "target_name": "southern rock", "weight": 2.0, "year": 2004}, {"source": "30", "target": "74", "source_name": "rock band", "target_name": "united states", "weight": 1.0, "year": 2004}, {"source": "30", "target": "77", "source_name": "rock band", "target_name": "rock music", "weight": 7.0, "year": 2004}, {"source": "30", "target": "80", "source_name": "rock band", "target_name": "folk music", "weight": 1.0, "year": 2004}, {"source": "30", "target": "82", "source_name": "rock band", "target_name": "heavy metal", "weight": 1.0, "year": 2004}, {"source": "33", "target": "53", "source_name": "jesus christ", "target_name": "popular music", "weight": 1.0, "year": 2004}, {"source": "33", "target": "77", "source_name": "jesus christ", "target_name": "rock music", "weight": 1.0, "year": 2004}, {"source": "34", "target": "40", "source_name": "mass media", "target_name": "musical instruments", "weight": 1.0, "year": 2004}, {"source": "34", "target": "48", "source_name": "mass media", "target_name": "pop music", "weight": 1.0, "year": 2004}, {"source": "34", "target": "51", "source_name": "mass media", "target_name": "cultural identity", "weight": 1.0, "year": 2004}, {"source": "34", "target": "52", "source_name": "mass media", "target_name": "folk song", "weight": 2.0, "year": 2004}, {"source": "34", "target": "53", "source_name": "mass media", "target_name": "popular music", "weight": 3.0, "year": 2004}, {"source": "34", "target": "66", "source_name": "mass media", "target_name": "hong kong", "weight": 1.0, "year": 2004}, {"source": "34", "target": "69", "source_name": "mass media", "target_name": "classical music", "weight": 1.0, "year": 2004}, {"source": "34", "target": "77", "source_name": "mass media", "target_name": "rock music", "weight": 1.0, "year": 2004}, {"source": "35", "target": "43", "source_name": "ancient greek", "target_name": "music education", "weight": 1.0, "year": 2004}, {"source": "35", "target": "65", "source_name": "ancient greek", "target_name": "country music", "weight": 1.0, "year": 2004}, {"source": "35", "target": "77", "source_name": "ancient greek", "target_name": "rock music", "weight": 1.0, "year": 2004}, {"source": "35", "target": "80", "source_name": "ancient greek", "target_name": "folk music", "weight": 1.0, "year": 2004}, {"source": "35", "target": "89", "source_name": "ancient greek", "target_name": "electronic music", "weight": 1.0, "year": 2004}, {"source": "36", "target": "42", "source_name": "music industry", "target_name": "simon frith", "weight": 1.0, "year": 2004}, {"source": "36", "target": "43", "source_name": "music industry", "target_name": "music education", "weight": 1.0, "year": 2004}, {"source": "36", "target": "48", "source_name": "music industry", "target_name": "pop music", "weight": 3.0, "year": 2004}, {"source": "36", "target": "51", "source_name": "music industry", "target_name": "cultural identity", "weight": 1.0, "year": 2004}, {"source": "36", "target": "53", "source_name": "music industry", "target_name": "popular music", "weight": 11.0, "year": 2004}, {"source": "36", "target": "61", "source_name": "music industry", "target_name": "progressive rock", "weight": 1.0, "year": 2004}, {"source": "36", "target": "65", "source_name": "music industry", "target_name": "country music", "weight": 1.0, "year": 2004}, {"source": "36", "target": "68", "source_name": "music industry", "target_name": "hearing loss", "weight": 1.0, "year": 2004}, {"source": "36", "target": "69", "source_name": "music industry", "target_name": "classical music", "weight": 1.0, "year": 2004}, {"source": "36", "target": "72", "source_name": "music industry", "target_name": "jimi hendrix", "weight": 3.0, "year": 2004}, {"source": "36", "target": "74", "source_name": "music industry", "target_name": "united states", "weight": 2.0, "year": 2004}, {"source": "36", "target": "77", "source_name": "music industry", "target_name": "rock music", "weight": 6.0, "year": 2004}, {"source": "36", "target": "78", "source_name": "music industry", "target_name": "hip hop", "weight": 1.0, "year": 2004}, {"source": "36", "target": "79", "source_name": "music industry", "target_name": "popular culture", "weight": 4.0, "year": 2004}, {"source": "36", "target": "83", "source_name": "music industry", "target_name": "folk rock", "weight": 1.0, "year": 2004}, {"source": "37", "target": "58", "source_name": "middle ages", "target_name": "music therapy", "weight": 1.0, "year": 2004}, {"source": "37", "target": "69", "source_name": "middle ages", "target_name": "classical music", "weight": 1.0, "year": 2004}, {"source": "37", "target": "77", "source_name": "middle ages", "target_name": "rock music", "weight": 1.0, "year": 2004}, {"source": "37", "target": "80", "source_name": "middle ages", "target_name": "folk music", "weight": 2.0, "year": 2004}, {"source": "40", "target": "49", "source_name": "musical instruments", "target_name": "music theory", "weight": 1.0, "year": 2004}, {"source": "40", "target": "70", "source_name": "musical instruments", "target_name": "world war", "weight": 1.0, "year": 2004}, {"source": "40", "target": "75", "source_name": "musical instruments", "target_name": "world war ii", "weight": 1.0, "year": 2004}, {"source": "40", "target": "89", "source_name": "musical instruments", "target_name": "electronic music", "weight": 1.0, "year": 2004}, {"source": "41", "target": "48", "source_name": "youth culture", "target_name": "pop music", "weight": 3.0, "year": 2004}, {"source": "41", "target": "51", "source_name": "youth culture", "target_name": "cultural identity", "weight": 2.0, "year": 2004}, {"source": "41", "target": "53", "source_name": "youth culture", "target_name": "popular music", "weight": 1.0, "year": 2004}, {"source": "41", "target": "60", "source_name": "youth culture", "target_name": "cultural studies", "weight": 2.0, "year": 2004}, {"source": "41", "target": "75", "source_name": "youth culture", "target_name": "world war ii", "weight": 1.0, "year": 2004}, {"source": "41", "target": "77", "source_name": "youth culture", "target_name": "rock music", "weight": 2.0, "year": 2004}, {"source": "42", "target": "48", "source_name": "simon frith", "target_name": "pop music", "weight": 6.0, "year": 2004}, {"source": "42", "target": "51", "source_name": "simon frith", "target_name": "cultural identity", "weight": 1.0, "year": 2004}, {"source": "42", "target": "53", "source_name": "simon frith", "target_name": "popular music", "weight": 4.0, "year": 2004}, {"source": "42", "target": "55", "source_name": "simon frith", "target_name": "rock criticism", "weight": 2.0, "year": 2004}, {"source": "42", "target": "57", "source_name": "simon frith", "target_name": "north america", "weight": 1.0, "year": 2004}, {"source": "42", "target": "60", "source_name": "simon frith", "target_name": "cultural studies", "weight": 1.0, "year": 2004}, {"source": "42", "target": "65", "source_name": "simon frith", "target_name": "country music", "weight": 1.0, "year": 2004}, {"source": "42", "target": "72", "source_name": "simon frith", "target_name": "jimi hendrix", "weight": 1.0, "year": 2004}, {"source": "42", "target": "76", "source_name": "simon frith", "target_name": "los angeles", "weight": 1.0, "year": 2004}, {"source": "42", "target": "77", "source_name": "simon frith", "target_name": "rock music", "weight": 2.0, "year": 2004}, {"source": "42", "target": "79", "source_name": "simon frith", "target_name": "popular culture", "weight": 1.0, "year": 2004}, {"source": "43", "target": "49", "source_name": "music education", "target_name": "music theory", "weight": 1.0, "year": 2004}, {"source": "43", "target": "53", "source_name": "music education", "target_name": "popular music", "weight": 4.0, "year": 2004}, {"source": "43", "target": "60", "source_name": "music education", "target_name": "cultural studies", "weight": 1.0, "year": 2004}, {"source": "43", "target": "77", "source_name": "music education", "target_name": "rock music", "weight": 1.0, "year": 2004}, {"source": "43", "target": "80", "source_name": "music education", "target_name": "folk music", "weight": 2.0, "year": 2004}, {"source": "44", "target": "53", "source_name": "alternative rock", "target_name": "popular music", "weight": 5.0, "year": 2004}, {"source": "44", "target": "57", "source_name": "alternative rock", "target_name": "north america", "weight": 3.0, "year": 2004}, {"source": "44", "target": "65", "source_name": "alternative rock", "target_name": "country music", "weight": 2.0, "year": 2004}, {"source": "44", "target": "67", "source_name": "alternative rock", "target_name": "rock art", "weight": 1.0, "year": 2004}, {"source": "44", "target": "73", "source_name": "alternative rock", "target_name": "southern rock", "weight": 1.0, "year": 2004}, {"source": "44", "target": "74", "source_name": "alternative rock", "target_name": "united states", "weight": 2.0, "year": 2004}, {"source": "44", "target": "77", "source_name": "alternative rock", "target_name": "rock music", "weight": 3.0, "year": 2004}, {"source": "44", "target": "78", "source_name": "alternative rock", "target_name": "hip hop", "weight": 1.0, "year": 2004}, {"source": "44", "target": "80", "source_name": "alternative rock", "target_name": "folk music", "weight": 1.0, "year": 2004}, {"source": "47", "target": "48", "source_name": "hard rock", "target_name": "pop music", "weight": 1.0, "year": 2004}, {"source": "47", "target": "77", "source_name": "hard rock", "target_name": "rock music", "weight": 2.0, "year": 2004}, {"source": "47", "target": "79", "source_name": "hard rock", "target_name": "popular culture", "weight": 1.0, "year": 2004}, {"source": "48", "target": "51", "source_name": "pop music", "target_name": "cultural identity", "weight": 2.0, "year": 2004}, {"source": "48", "target": "52", "source_name": "pop music", "target_name": "folk song", "weight": 1.0, "year": 2004}, {"source": "48", "target": "53", "source_name": "pop music", "target_name": "popular music", "weight": 9.0, "year": 2004}, {"source": "48", "target": "55", "source_name": "pop music", "target_name": "rock criticism", "weight": 2.0, "year": 2004}, {"source": "48", "target": "57", "source_name": "pop music", "target_name": "north america", "weight": 1.0, "year": 2004}, {"source": "48", "target": "60", "source_name": "pop music", "target_name": "cultural studies", "weight": 1.0, "year": 2004}, {"source": "48", "target": "64", "source_name": "pop music", "target_name": "english language", "weight": 1.0, "year": 2004}, {"source": "48", "target": "65", "source_name": "pop music", "target_name": "country music", "weight": 1.0, "year": 2004}, {"source": "48", "target": "66", "source_name": "pop music", "target_name": "hong kong", "weight": 2.0, "year": 2004}, {"source": "48", "target": "70", "source_name": "pop music", "target_name": "world war", "weight": 2.0, "year": 2004}, {"source": "48", "target": "72", "source_name": "pop music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2004}, {"source": "48", "target": "74", "source_name": "pop music", "target_name": "united states", "weight": 2.0, "year": 2004}, {"source": "48", "target": "77", "source_name": "pop music", "target_name": "rock music", "weight": 9.0, "year": 2004}, {"source": "48", "target": "78", "source_name": "pop music", "target_name": "hip hop", "weight": 1.0, "year": 2004}, {"source": "48", "target": "79", "source_name": "pop music", "target_name": "popular culture", "weight": 2.0, "year": 2004}, {"source": "48", "target": "82", "source_name": "pop music", "target_name": "heavy metal", "weight": 1.0, "year": 2004}, {"source": "49", "target": "53", "source_name": "music theory", "target_name": "popular music", "weight": 1.0, "year": 2004}, {"source": "49", "target": "57", "source_name": "music theory", "target_name": "north america", "weight": 1.0, "year": 2004}, {"source": "49", "target": "72", "source_name": "music theory", "target_name": "jimi hendrix", "weight": 1.0, "year": 2004}, {"source": "49", "target": "77", "source_name": "music theory", "target_name": "rock music", "weight": 2.0, "year": 2004}, {"source": "50", "target": "53", "source_name": "hollywood film", "target_name": "popular music", "weight": 1.0, "year": 2004}, {"source": "50", "target": "79", "source_name": "hollywood film", "target_name": "popular culture", "weight": 1.0, "year": 2004}, {"source": "51", "target": "52", "source_name": "cultural identity", "target_name": "folk song", "weight": 1.0, "year": 2004}, {"source": "51", "target": "53", "source_name": "cultural identity", "target_name": "popular music", "weight": 2.0, "year": 2004}, {"source": "51", "target": "60", "source_name": "cultural identity", "target_name": "cultural studies", "weight": 2.0, "year": 2004}, {"source": "51", "target": "66", "source_name": "cultural identity", "target_name": "hong kong", "weight": 1.0, "year": 2004}, {"source": "51", "target": "74", "source_name": "cultural identity", "target_name": "united states", "weight": 1.0, "year": 2004}, {"source": "51", "target": "77", "source_name": "cultural identity", "target_name": "rock music", "weight": 5.0, "year": 2004}, {"source": "51", "target": "79", "source_name": "cultural identity", "target_name": "popular culture", "weight": 1.0, "year": 2004}, {"source": "52", "target": "53", "source_name": "folk song", "target_name": "popular music", "weight": 3.0, "year": 2004}, {"source": "52", "target": "66", "source_name": "folk song", "target_name": "hong kong", "weight": 1.0, "year": 2004}, {"source": "52", "target": "69", "source_name": "folk song", "target_name": "classical music", "weight": 1.0, "year": 2004}, {"source": "52", "target": "77", "source_name": "folk song", "target_name": "rock music", "weight": 1.0, "year": 2004}, {"source": "52", "target": "80", "source_name": "folk song", "target_name": "folk music", "weight": 1.0, "year": 2004}, {"source": "53", "target": "54", "source_name": "popular music", "target_name": "american popular music", "weight": 3.0, "year": 2004}, {"source": "53", "target": "55", "source_name": "popular music", "target_name": "rock criticism", "weight": 1.0, "year": 2004}, {"source": "53", "target": "56", "source_name": "popular music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2004}, {"source": "53", "target": "57", "source_name": "popular music", "target_name": "north america", "weight": 3.0, "year": 2004}, {"source": "53", "target": "58", "source_name": "popular music", "target_name": "music therapy", "weight": 1.0, "year": 2004}, {"source": "53", "target": "59", "source_name": "popular music", "target_name": "college students", "weight": 1.0, "year": 2004}, {"source": "53", "target": "60", "source_name": "popular music", "target_name": "cultural studies", "weight": 5.0, "year": 2004}, {"source": "53", "target": "61", "source_name": "popular music", "target_name": "progressive rock", "weight": 3.0, "year": 2004}, {"source": "53", "target": "62", "source_name": "popular music", "target_name": "led zeppelin", "weight": 1.0, "year": 2004}, {"source": "53", "target": "65", "source_name": "popular music", "target_name": "country music", "weight": 5.0, "year": 2004}, {"source": "53", "target": "66", "source_name": "popular music", "target_name": "hong kong", "weight": 1.0, "year": 2004}, {"source": "53", "target": "67", "source_name": "popular music", "target_name": "rock art", "weight": 1.0, "year": 2004}, {"source": "53", "target": "69", "source_name": "popular music", "target_name": "classical music", "weight": 5.0, "year": 2004}, {"source": "53", "target": "70", "source_name": "popular music", "target_name": "world war", "weight": 2.0, "year": 2004}, {"source": "53", "target": "71", "source_name": "popular music", "target_name": "latin american", "weight": 1.0, "year": 2004}, {"source": "53", "target": "72", "source_name": "popular music", "target_name": "jimi hendrix", "weight": 3.0, "year": 2004}, {"source": "53", "target": "73", "source_name": "popular music", "target_name": "southern rock", "weight": 2.0, "year": 2004}, {"source": "53", "target": "74", "source_name": "popular music", "target_name": "united states", "weight": 8.0, "year": 2004}, {"source": "53", "target": "75", "source_name": "popular music", "target_name": "world war ii", "weight": 2.0, "year": 2004}, {"source": "53", "target": "76", "source_name": "popular music", "target_name": "los angeles", "weight": 3.0, "year": 2004}, {"source": "53", "target": "77", "source_name": "popular music", "target_name": "rock music", "weight": 33.0, "year": 2004}, {"source": "53", "target": "78", "source_name": "popular music", "target_name": "hip hop", "weight": 3.0, "year": 2004}, {"source": "53", "target": "79", "source_name": "popular music", "target_name": "popular culture", "weight": 10.0, "year": 2004}, {"source": "53", "target": "80", "source_name": "popular music", "target_name": "folk music", "weight": 6.0, "year": 2004}, {"source": "53", "target": "82", "source_name": "popular music", "target_name": "heavy metal", "weight": 4.0, "year": 2004}, {"source": "53", "target": "83", "source_name": "popular music", "target_name": "folk rock", "weight": 1.0, "year": 2004}, {"source": "53", "target": "85", "source_name": "popular music", "target_name": "jewish music", "weight": 1.0, "year": 2004}, {"source": "53", "target": "87", "source_name": "popular music", "target_name": "music hall", "weight": 1.0, "year": 2004}, {"source": "53", "target": "88", "source_name": "popular music", "target_name": "oxford university press", "weight": 2.0, "year": 2004}, {"source": "53", "target": "89", "source_name": "popular music", "target_name": "electronic music", "weight": 1.0, "year": 2004}, {"source": "54", "target": "65", "source_name": "american popular music", "target_name": "country music", "weight": 1.0, "year": 2004}, {"source": "54", "target": "69", "source_name": "american popular music", "target_name": "classical music", "weight": 1.0, "year": 2004}, {"source": "54", "target": "71", "source_name": "american popular music", "target_name": "latin american", "weight": 1.0, "year": 2004}, {"source": "54", "target": "74", "source_name": "american popular music", "target_name": "united states", "weight": 1.0, "year": 2004}, {"source": "54", "target": "76", "source_name": "american popular music", "target_name": "los angeles", "weight": 1.0, "year": 2004}, {"source": "54", "target": "79", "source_name": "american popular music", "target_name": "popular culture", "weight": 1.0, "year": 2004}, {"source": "55", "target": "57", "source_name": "rock criticism", "target_name": "north america", "weight": 1.0, "year": 2004}, {"source": "55", "target": "61", "source_name": "rock criticism", "target_name": "progressive rock", "weight": 1.0, "year": 2004}, {"source": "55", "target": "65", "source_name": "rock criticism", "target_name": "country music", "weight": 1.0, "year": 2004}, {"source": "55", "target": "77", "source_name": "rock criticism", "target_name": "rock music", "weight": 1.0, "year": 2004}, {"source": "56", "target": "72", "source_name": "bruce springsteen", "target_name": "jimi hendrix", "weight": 1.0, "year": 2004}, {"source": "56", "target": "77", "source_name": "bruce springsteen", "target_name": "rock music", "weight": 2.0, "year": 2004}, {"source": "56", "target": "79", "source_name": "bruce springsteen", "target_name": "popular culture", "weight": 1.0, "year": 2004}, {"source": "57", "target": "65", "source_name": "north america", "target_name": "country music", "weight": 2.0, "year": 2004}, {"source": "57", "target": "73", "source_name": "north america", "target_name": "southern rock", "weight": 1.0, "year": 2004}, {"source": "57", "target": "74", "source_name": "north america", "target_name": "united states", "weight": 2.0, "year": 2004}, {"source": "57", "target": "77", "source_name": "north america", "target_name": "rock music", "weight": 1.0, "year": 2004}, {"source": "57", "target": "78", "source_name": "north america", "target_name": "hip hop", "weight": 1.0, "year": 2004}, {"source": "57", "target": "80", "source_name": "north america", "target_name": "folk music", "weight": 2.0, "year": 2004}, {"source": "58", "target": "64", "source_name": "music therapy", "target_name": "english language", "weight": 1.0, "year": 2004}, {"source": "58", "target": "77", "source_name": "music therapy", "target_name": "rock music", "weight": 3.0, "year": 2004}, {"source": "59", "target": "74", "source_name": "college students", "target_name": "united states", "weight": 1.0, "year": 2004}, {"source": "60", "target": "62", "source_name": "cultural studies", "target_name": "led zeppelin", "weight": 1.0, "year": 2004}, {"source": "60", "target": "71", "source_name": "cultural studies", "target_name": "latin american", "weight": 1.0, "year": 2004}, {"source": "60", "target": "76", "source_name": "cultural studies", "target_name": "los angeles", "weight": 1.0, "year": 2004}, {"source": "60", "target": "77", "source_name": "cultural studies", "target_name": "rock music", "weight": 5.0, "year": 2004}, {"source": "60", "target": "79", "source_name": "cultural studies", "target_name": "popular culture", "weight": 4.0, "year": 2004}, {"source": "60", "target": "80", "source_name": "cultural studies", "target_name": "folk music", "weight": 1.0, "year": 2004}, {"source": "60", "target": "85", "source_name": "cultural studies", "target_name": "jewish music", "weight": 1.0, "year": 2004}, {"source": "60", "target": "87", "source_name": "cultural studies", "target_name": "music hall", "weight": 1.0, "year": 2004}, {"source": "60", "target": "88", "source_name": "cultural studies", "target_name": "oxford university press", "weight": 2.0, "year": 2004}, {"source": "61", "target": "69", "source_name": "progressive rock", "target_name": "classical music", "weight": 2.0, "year": 2004}, {"source": "61", "target": "72", "source_name": "progressive rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2004}, {"source": "61", "target": "74", "source_name": "progressive rock", "target_name": "united states", "weight": 1.0, "year": 2004}, {"source": "61", "target": "77", "source_name": "progressive rock", "target_name": "rock music", "weight": 7.0, "year": 2004}, {"source": "61", "target": "82", "source_name": "progressive rock", "target_name": "heavy metal", "weight": 1.0, "year": 2004}, {"source": "61", "target": "89", "source_name": "progressive rock", "target_name": "electronic music", "weight": 1.0, "year": 2004}, {"source": "62", "target": "77", "source_name": "led zeppelin", "target_name": "rock music", "weight": 1.0, "year": 2004}, {"source": "62", "target": "88", "source_name": "led zeppelin", "target_name": "oxford university press", "weight": 1.0, "year": 2004}, {"source": "64", "target": "70", "source_name": "english language", "target_name": "world war", "weight": 1.0, "year": 2004}, {"source": "64", "target": "74", "source_name": "english language", "target_name": "united states", "weight": 1.0, "year": 2004}, {"source": "64", "target": "77", "source_name": "english language", "target_name": "rock music", "weight": 1.0, "year": 2004}, {"source": "65", "target": "73", "source_name": "country music", "target_name": "southern rock", "weight": 2.0, "year": 2004}, {"source": "65", "target": "74", "source_name": "country music", "target_name": "united states", "weight": 1.0, "year": 2004}, {"source": "65", "target": "77", "source_name": "country music", "target_name": "rock music", "weight": 3.0, "year": 2004}, {"source": "65", "target": "80", "source_name": "country music", "target_name": "folk music", "weight": 2.0, "year": 2004}, {"source": "65", "target": "89", "source_name": "country music", "target_name": "electronic music", "weight": 1.0, "year": 2004}, {"source": "66", "target": "77", "source_name": "hong kong", "target_name": "rock music", "weight": 2.0, "year": 2004}, {"source": "67", "target": "77", "source_name": "rock art", "target_name": "rock music", "weight": 1.0, "year": 2004}, {"source": "68", "target": "77", "source_name": "hearing loss", "target_name": "rock music", "weight": 2.0, "year": 2004}, {"source": "69", "target": "71", "source_name": "classical music", "target_name": "latin american", "weight": 1.0, "year": 2004}, {"source": "69", "target": "72", "source_name": "classical music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2004}, {"source": "69", "target": "74", "source_name": "classical music", "target_name": "united states", "weight": 3.0, "year": 2004}, {"source": "69", "target": "76", "source_name": "classical music", "target_name": "los angeles", "weight": 1.0, "year": 2004}, {"source": "69", "target": "77", "source_name": "classical music", "target_name": "rock music", "weight": 8.0, "year": 2004}, {"source": "69", "target": "79", "source_name": "classical music", "target_name": "popular culture", "weight": 1.0, "year": 2004}, {"source": "69", "target": "89", "source_name": "classical music", "target_name": "electronic music", "weight": 1.0, "year": 2004}, {"source": "70", "target": "74", "source_name": "world war", "target_name": "united states", "weight": 2.0, "year": 2004}, {"source": "70", "target": "75", "source_name": "world war", "target_name": "world war ii", "weight": 1.0, "year": 2004}, {"source": "70", "target": "77", "source_name": "world war", "target_name": "rock music", "weight": 3.0, "year": 2004}, {"source": "70", "target": "79", "source_name": "world war", "target_name": "popular culture", "weight": 1.0, "year": 2004}, {"source": "70", "target": "80", "source_name": "world war", "target_name": "folk music", "weight": 1.0, "year": 2004}, {"source": "70", "target": "87", "source_name": "world war", "target_name": "music hall", "weight": 1.0, "year": 2004}, {"source": "70", "target": "89", "source_name": "world war", "target_name": "electronic music", "weight": 1.0, "year": 2004}, {"source": "71", "target": "74", "source_name": "latin american", "target_name": "united states", "weight": 2.0, "year": 2004}, {"source": "71", "target": "76", "source_name": "latin american", "target_name": "los angeles", "weight": 1.0, "year": 2004}, {"source": "71", "target": "77", "source_name": "latin american", "target_name": "rock music", "weight": 2.0, "year": 2004}, {"source": "71", "target": "79", "source_name": "latin american", "target_name": "popular culture", "weight": 1.0, "year": 2004}, {"source": "72", "target": "77", "source_name": "jimi hendrix", "target_name": "rock music", "weight": 3.0, "year": 2004}, {"source": "72", "target": "79", "source_name": "jimi hendrix", "target_name": "popular culture", "weight": 1.0, "year": 2004}, {"source": "72", "target": "89", "source_name": "jimi hendrix", "target_name": "electronic music", "weight": 1.0, "year": 2004}, {"source": "73", "target": "77", "source_name": "southern rock", "target_name": "rock music", "weight": 1.0, "year": 2004}, {"source": "73", "target": "80", "source_name": "southern rock", "target_name": "folk music", "weight": 1.0, "year": 2004}, {"source": "74", "target": "76", "source_name": "united states", "target_name": "los angeles", "weight": 1.0, "year": 2004}, {"source": "74", "target": "77", "source_name": "united states", "target_name": "rock music", "weight": 6.0, "year": 2004}, {"source": "74", "target": "78", "source_name": "united states", "target_name": "hip hop", "weight": 1.0, "year": 2004}, {"source": "74", "target": "79", "source_name": "united states", "target_name": "popular culture", "weight": 2.0, "year": 2004}, {"source": "74", "target": "80", "source_name": "united states", "target_name": "folk music", "weight": 2.0, "year": 2004}, {"source": "76", "target": "77", "source_name": "los angeles", "target_name": "rock music", "weight": 1.0, "year": 2004}, {"source": "76", "target": "79", "source_name": "los angeles", "target_name": "popular culture", "weight": 1.0, "year": 2004}, {"source": "77", "target": "78", "source_name": "rock music", "target_name": "hip hop", "weight": 2.0, "year": 2004}, {"source": "77", "target": "79", "source_name": "rock music", "target_name": "popular culture", "weight": 5.0, "year": 2004}, {"source": "77", "target": "80", "source_name": "rock music", "target_name": "folk music", "weight": 1.0, "year": 2004}, {"source": "77", "target": "82", "source_name": "rock music", "target_name": "heavy metal", "weight": 4.0, "year": 2004}, {"source": "77", "target": "88", "source_name": "rock music", "target_name": "oxford university press", "weight": 1.0, "year": 2004}, {"source": "77", "target": "89", "source_name": "rock music", "target_name": "electronic music", "weight": 3.0, "year": 2004}, {"source": "78", "target": "79", "source_name": "hip hop", "target_name": "popular culture", "weight": 1.0, "year": 2004}, {"source": "78", "target": "82", "source_name": "hip hop", "target_name": "heavy metal", "weight": 1.0, "year": 2004}, {"source": "79", "target": "80", "source_name": "popular culture", "target_name": "folk music", "weight": 2.0, "year": 2004}, {"source": "79", "target": "82", "source_name": "popular culture", "target_name": "heavy metal", "weight": 1.0, "year": 2004}, {"source": "79", "target": "85", "source_name": "popular culture", "target_name": "jewish music", "weight": 1.0, "year": 2004}, {"source": "79", "target": "87", "source_name": "popular culture", "target_name": "music hall", "weight": 2.0, "year": 2004}, {"source": "79", "target": "88", "source_name": "popular culture", "target_name": "oxford university press", "weight": 1.0, "year": 2004}, {"source": "80", "target": "85", "source_name": "folk music", "target_name": "jewish music", "weight": 1.0, "year": 2004}, {"source": "80", "target": "87", "source_name": "folk music", "target_name": "music hall", "weight": 1.0, "year": 2004}, {"source": "80", "target": "88", "source_name": "folk music", "target_name": "oxford university press", "weight": 1.0, "year": 2004}, {"source": "80", "target": "89", "source_name": "folk music", "target_name": "electronic music", "weight": 1.0, "year": 2004}, {"source": "85", "target": "88", "source_name": "jewish music", "target_name": "oxford university press", "weight": 1.0, "year": 2004}]}, {"2005": [{"source": "1", "target": "28", "source_name": "rock star", "target_name": "high school", "weight": 1.0, "year": 2005}, {"source": "1", "target": "36", "source_name": "rock star", "target_name": "music industry", "weight": 2.0, "year": 2005}, {"source": "1", "target": "41", "source_name": "rock star", "target_name": "youth culture", "weight": 1.0, "year": 2005}, {"source": "1", "target": "48", "source_name": "rock star", "target_name": "pop music", "weight": 2.0, "year": 2005}, {"source": "1", "target": "51", "source_name": "rock star", "target_name": "cultural identity", "weight": 1.0, "year": 2005}, {"source": "1", "target": "53", "source_name": "rock star", "target_name": "popular music", "weight": 2.0, "year": 2005}, {"source": "1", "target": "74", "source_name": "rock star", "target_name": "united states", "weight": 1.0, "year": 2005}, {"source": "1", "target": "77", "source_name": "rock star", "target_name": "rock music", "weight": 4.0, "year": 2005}, {"source": "1", "target": "82", "source_name": "rock star", "target_name": "heavy metal", "weight": 1.0, "year": 2005}, {"source": "2", "target": "19", "source_name": "indie rock", "target_name": "music video", "weight": 1.0, "year": 2005}, {"source": "2", "target": "48", "source_name": "indie rock", "target_name": "pop music", "weight": 1.0, "year": 2005}, {"source": "2", "target": "51", "source_name": "indie rock", "target_name": "cultural identity", "weight": 1.0, "year": 2005}, {"source": "2", "target": "72", "source_name": "indie rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2005}, {"source": "2", "target": "74", "source_name": "indie rock", "target_name": "united states", "weight": 1.0, "year": 2005}, {"source": "2", "target": "77", "source_name": "indie rock", "target_name": "rock music", "weight": 1.0, "year": 2005}, {"source": "3", "target": "79", "source_name": "glam rock", "target_name": "popular culture", "weight": 1.0, "year": 2005}, {"source": "4", "target": "9", "source_name": "gregorian chant", "target_name": "compact disc", "weight": 1.0, "year": 2005}, {"source": "4", "target": "37", "source_name": "gregorian chant", "target_name": "middle ages", "weight": 1.0, "year": 2005}, {"source": "5", "target": "12", "source_name": "jesus christ superstar", "target_name": "rock opera", "weight": 1.0, "year": 2005}, {"source": "5", "target": "15", "source_name": "jesus christ superstar", "target_name": "musical theatre", "weight": 1.0, "year": 2005}, {"source": "5", "target": "33", "source_name": "jesus christ superstar", "target_name": "jesus christ", "weight": 1.0, "year": 2005}, {"source": "5", "target": "53", "source_name": "jesus christ superstar", "target_name": "popular music", "weight": 1.0, "year": 2005}, {"source": "5", "target": "77", "source_name": "jesus christ superstar", "target_name": "rock music", "weight": 1.0, "year": 2005}, {"source": "6", "target": "10", "source_name": "elvis presley", "target_name": "african american", "weight": 1.0, "year": 2005}, {"source": "6", "target": "16", "source_name": "elvis presley", "target_name": "bob dylan", "weight": 1.0, "year": 2005}, {"source": "6", "target": "17", "source_name": "elvis presley", "target_name": "civil rights", "weight": 1.0, "year": 2005}, {"source": "6", "target": "29", "source_name": "elvis presley", "target_name": "rolling stone", "weight": 1.0, "year": 2005}, {"source": "6", "target": "36", "source_name": "elvis presley", "target_name": "music industry", "weight": 1.0, "year": 2005}, {"source": "6", "target": "40", "source_name": "elvis presley", "target_name": "musical instruments", "weight": 1.0, "year": 2005}, {"source": "6", "target": "41", "source_name": "elvis presley", "target_name": "youth culture", "weight": 1.0, "year": 2005}, {"source": "6", "target": "42", "source_name": "elvis presley", "target_name": "simon frith", "weight": 1.0, "year": 2005}, {"source": "6", "target": "48", "source_name": "elvis presley", "target_name": "pop music", "weight": 1.0, "year": 2005}, {"source": "6", "target": "51", "source_name": "elvis presley", "target_name": "cultural identity", "weight": 1.0, "year": 2005}, {"source": "6", "target": "53", "source_name": "elvis presley", "target_name": "popular music", "weight": 3.0, "year": 2005}, {"source": "6", "target": "54", "source_name": "elvis presley", "target_name": "american popular music", "weight": 1.0, "year": 2005}, {"source": "6", "target": "60", "source_name": "elvis presley", "target_name": "cultural studies", "weight": 1.0, "year": 2005}, {"source": "6", "target": "72", "source_name": "elvis presley", "target_name": "jimi hendrix", "weight": 1.0, "year": 2005}, {"source": "6", "target": "74", "source_name": "elvis presley", "target_name": "united states", "weight": 2.0, "year": 2005}, {"source": "6", "target": "77", "source_name": "elvis presley", "target_name": "rock music", "weight": 1.0, "year": 2005}, {"source": "6", "target": "79", "source_name": "elvis presley", "target_name": "popular culture", "weight": 1.0, "year": 2005}, {"source": "6", "target": "80", "source_name": "elvis presley", "target_name": "folk music", "weight": 1.0, "year": 2005}, {"source": "7", "target": "34", "source_name": "nineteenth century", "target_name": "mass media", "weight": 1.0, "year": 2005}, {"source": "7", "target": "43", "source_name": "nineteenth century", "target_name": "music education", "weight": 1.0, "year": 2005}, {"source": "7", "target": "52", "source_name": "nineteenth century", "target_name": "folk song", "weight": 1.0, "year": 2005}, {"source": "7", "target": "53", "source_name": "nineteenth century", "target_name": "popular music", "weight": 1.0, "year": 2005}, {"source": "7", "target": "69", "source_name": "nineteenth century", "target_name": "classical music", "weight": 1.0, "year": 2005}, {"source": "8", "target": "20", "source_name": "christian rock", "target_name": "garage rock", "weight": 1.0, "year": 2005}, {"source": "8", "target": "36", "source_name": "christian rock", "target_name": "music industry", "weight": 1.0, "year": 2005}, {"source": "8", "target": "44", "source_name": "christian rock", "target_name": "alternative rock", "weight": 1.0, "year": 2005}, {"source": "8", "target": "53", "source_name": "christian rock", "target_name": "popular music", "weight": 2.0, "year": 2005}, {"source": "8", "target": "57", "source_name": "christian rock", "target_name": "north america", "weight": 1.0, "year": 2005}, {"source": "8", "target": "65", "source_name": "christian rock", "target_name": "country music", "weight": 1.0, "year": 2005}, {"source": "8", "target": "73", "source_name": "christian rock", "target_name": "southern rock", "weight": 1.0, "year": 2005}, {"source": "8", "target": "77", "source_name": "christian rock", "target_name": "rock music", "weight": 1.0, "year": 2005}, {"source": "8", "target": "79", "source_name": "christian rock", "target_name": "popular culture", "weight": 1.0, "year": 2005}, {"source": "8", "target": "80", "source_name": "christian rock", "target_name": "folk music", "weight": 1.0, "year": 2005}, {"source": "9", "target": "10", "source_name": "compact disc", "target_name": "african american", "weight": 1.0, "year": 2005}, {"source": "9", "target": "24", "source_name": "compact disc", "target_name": "punk rock", "weight": 1.0, "year": 2005}, {"source": "9", "target": "36", "source_name": "compact disc", "target_name": "music industry", "weight": 1.0, "year": 2005}, {"source": "9", "target": "37", "source_name": "compact disc", "target_name": "middle ages", "weight": 1.0, "year": 2005}, {"source": "9", "target": "53", "source_name": "compact disc", "target_name": "popular music", "weight": 2.0, "year": 2005}, {"source": "9", "target": "74", "source_name": "compact disc", "target_name": "united states", "weight": 1.0, "year": 2005}, {"source": "9", "target": "79", "source_name": "compact disc", "target_name": "popular culture", "weight": 1.0, "year": 2005}, {"source": "9", "target": "80", "source_name": "compact disc", "target_name": "folk music", "weight": 1.0, "year": 2005}, {"source": "10", "target": "15", "source_name": "african american", "target_name": "musical theatre", "weight": 1.0, "year": 2005}, {"source": "10", "target": "17", "source_name": "african american", "target_name": "civil rights", "weight": 1.0, "year": 2005}, {"source": "10", "target": "24", "source_name": "african american", "target_name": "punk rock", "weight": 1.0, "year": 2005}, {"source": "10", "target": "53", "source_name": "african american", "target_name": "popular music", "weight": 3.0, "year": 2005}, {"source": "10", "target": "74", "source_name": "african american", "target_name": "united states", "weight": 2.0, "year": 2005}, {"source": "10", "target": "79", "source_name": "african american", "target_name": "popular culture", "weight": 1.0, "year": 2005}, {"source": "10", "target": "80", "source_name": "african american", "target_name": "folk music", "weight": 1.0, "year": 2005}, {"source": "11", "target": "23", "source_name": "south africa", "target_name": "electronic dance music", "weight": 1.0, "year": 2005}, {"source": "11", "target": "36", "source_name": "south africa", "target_name": "music industry", "weight": 1.0, "year": 2005}, {"source": "11", "target": "53", "source_name": "south africa", "target_name": "popular music", "weight": 1.0, "year": 2005}, {"source": "11", "target": "74", "source_name": "south africa", "target_name": "united states", "weight": 2.0, "year": 2005}, {"source": "11", "target": "88", "source_name": "south africa", "target_name": "oxford university press", "weight": 1.0, "year": 2005}, {"source": "12", "target": "15", "source_name": "rock opera", "target_name": "musical theatre", "weight": 2.0, "year": 2005}, {"source": "12", "target": "33", "source_name": "rock opera", "target_name": "jesus christ", "weight": 1.0, "year": 2005}, {"source": "12", "target": "53", "source_name": "rock opera", "target_name": "popular music", "weight": 1.0, "year": 2005}, {"source": "12", "target": "77", "source_name": "rock opera", "target_name": "rock music", "weight": 1.0, "year": 2005}, {"source": "12", "target": "79", "source_name": "rock opera", "target_name": "popular culture", "weight": 1.0, "year": 2005}, {"source": "15", "target": "33", "source_name": "musical theatre", "target_name": "jesus christ", "weight": 1.0, "year": 2005}, {"source": "15", "target": "53", "source_name": "musical theatre", "target_name": "popular music", "weight": 1.0, "year": 2005}, {"source": "15", "target": "70", "source_name": "musical theatre", "target_name": "world war", "weight": 1.0, "year": 2005}, {"source": "15", "target": "74", "source_name": "musical theatre", "target_name": "united states", "weight": 1.0, "year": 2005}, {"source": "15", "target": "77", "source_name": "musical theatre", "target_name": "rock music", "weight": 1.0, "year": 2005}, {"source": "16", "target": "29", "source_name": "bob dylan", "target_name": "rolling stone", "weight": 1.0, "year": 2005}, {"source": "16", "target": "36", "source_name": "bob dylan", "target_name": "music industry", "weight": 1.0, "year": 2005}, {"source": "16", "target": "42", "source_name": "bob dylan", "target_name": "simon frith", "weight": 1.0, "year": 2005}, {"source": "16", "target": "48", "source_name": "bob dylan", "target_name": "pop music", "weight": 2.0, "year": 2005}, {"source": "16", "target": "53", "source_name": "bob dylan", "target_name": "popular music", "weight": 2.0, "year": 2005}, {"source": "16", "target": "69", "source_name": "bob dylan", "target_name": "classical music", "weight": 1.0, "year": 2005}, {"source": "16", "target": "72", "source_name": "bob dylan", "target_name": "jimi hendrix", "weight": 1.0, "year": 2005}, {"source": "17", "target": "30", "source_name": "civil rights", "target_name": "rock band", "weight": 1.0, "year": 2005}, {"source": "17", "target": "41", "source_name": "civil rights", "target_name": "youth culture", "weight": 1.0, "year": 2005}, {"source": "17", "target": "53", "source_name": "civil rights", "target_name": "popular music", "weight": 2.0, "year": 2005}, {"source": "17", "target": "73", "source_name": "civil rights", "target_name": "southern rock", "weight": 1.0, "year": 2005}, {"source": "17", "target": "74", "source_name": "civil rights", "target_name": "united states", "weight": 1.0, "year": 2005}, {"source": "17", "target": "75", "source_name": "civil rights", "target_name": "world war ii", "weight": 1.0, "year": 2005}, {"source": "17", "target": "77", "source_name": "civil rights", "target_name": "rock music", "weight": 1.0, "year": 2005}, {"source": "17", "target": "79", "source_name": "civil rights", "target_name": "popular culture", "weight": 1.0, "year": 2005}, {"source": "19", "target": "36", "source_name": "music video", "target_name": "music industry", "weight": 1.0, "year": 2005}, {"source": "19", "target": "47", "source_name": "music video", "target_name": "hard rock", "weight": 1.0, "year": 2005}, {"source": "19", "target": "48", "source_name": "music video", "target_name": "pop music", "weight": 3.0, "year": 2005}, {"source": "19", "target": "51", "source_name": "music video", "target_name": "cultural identity", "weight": 1.0, "year": 2005}, {"source": "19", "target": "53", "source_name": "music video", "target_name": "popular music", "weight": 2.0, "year": 2005}, {"source": "19", "target": "65", "source_name": "music video", "target_name": "country music", "weight": 2.0, "year": 2005}, {"source": "19", "target": "72", "source_name": "music video", "target_name": "jimi hendrix", "weight": 1.0, "year": 2005}, {"source": "19", "target": "74", "source_name": "music video", "target_name": "united states", "weight": 1.0, "year": 2005}, {"source": "19", "target": "77", "source_name": "music video", "target_name": "rock music", "weight": 5.0, "year": 2005}, {"source": "19", "target": "78", "source_name": "music video", "target_name": "hip hop", "weight": 1.0, "year": 2005}, {"source": "19", "target": "82", "source_name": "music video", "target_name": "heavy metal", "weight": 1.0, "year": 2005}, {"source": "20", "target": "44", "source_name": "garage rock", "target_name": "alternative rock", "weight": 1.0, "year": 2005}, {"source": "20", "target": "53", "source_name": "garage rock", "target_name": "popular music", "weight": 1.0, "year": 2005}, {"source": "20", "target": "57", "source_name": "garage rock", "target_name": "north america", "weight": 1.0, "year": 2005}, {"source": "20", "target": "65", "source_name": "garage rock", "target_name": "country music", "weight": 1.0, "year": 2005}, {"source": "20", "target": "73", "source_name": "garage rock", "target_name": "southern rock", "weight": 1.0, "year": 2005}, {"source": "20", "target": "80", "source_name": "garage rock", "target_name": "folk music", "weight": 1.0, "year": 2005}, {"source": "21", "target": "47", "source_name": "social protest", "target_name": "hard rock", "weight": 1.0, "year": 2005}, {"source": "21", "target": "48", "source_name": "social protest", "target_name": "pop music", "weight": 1.0, "year": 2005}, {"source": "21", "target": "53", "source_name": "social protest", "target_name": "popular music", "weight": 1.0, "year": 2005}, {"source": "21", "target": "57", "source_name": "social protest", "target_name": "north america", "weight": 2.0, "year": 2005}, {"source": "21", "target": "71", "source_name": "social protest", "target_name": "latin american", "weight": 1.0, "year": 2005}, {"source": "21", "target": "74", "source_name": "social protest", "target_name": "united states", "weight": 1.0, "year": 2005}, {"source": "21", "target": "77", "source_name": "social protest", "target_name": "rock music", "weight": 1.0, "year": 2005}, {"source": "22", "target": "35", "source_name": "chamber music", "target_name": "ancient greek", "weight": 1.0, "year": 2005}, {"source": "22", "target": "65", "source_name": "chamber music", "target_name": "country music", "weight": 1.0, "year": 2005}, {"source": "22", "target": "69", "source_name": "chamber music", "target_name": "classical music", "weight": 1.0, "year": 2005}, {"source": "22", "target": "77", "source_name": "chamber music", "target_name": "rock music", "weight": 1.0, "year": 2005}, {"source": "22", "target": "80", "source_name": "chamber music", "target_name": "folk music", "weight": 1.0, "year": 2005}, {"source": "22", "target": "89", "source_name": "chamber music", "target_name": "electronic music", "weight": 2.0, "year": 2005}, {"source": "23", "target": "42", "source_name": "electronic dance music", "target_name": "simon frith", "weight": 1.0, "year": 2005}, {"source": "23", "target": "53", "source_name": "electronic dance music", "target_name": "popular music", "weight": 3.0, "year": 2005}, {"source": "23", "target": "60", "source_name": "electronic dance music", "target_name": "cultural studies", "weight": 1.0, "year": 2005}, {"source": "23", "target": "76", "source_name": "electronic dance music", "target_name": "los angeles", "weight": 1.0, "year": 2005}, {"source": "23", "target": "79", "source_name": "electronic dance music", "target_name": "popular culture", "weight": 1.0, "year": 2005}, {"source": "24", "target": "36", "source_name": "punk rock", "target_name": "music industry", "weight": 1.0, "year": 2005}, {"source": "24", "target": "42", "source_name": "punk rock", "target_name": "simon frith", "weight": 1.0, "year": 2005}, {"source": "24", "target": "48", "source_name": "punk rock", "target_name": "pop music", "weight": 2.0, "year": 2005}, {"source": "24", "target": "53", "source_name": "punk rock", "target_name": "popular music", "weight": 3.0, "year": 2005}, {"source": "24", "target": "74", "source_name": "punk rock", "target_name": "united states", "weight": 1.0, "year": 2005}, {"source": "24", "target": "77", "source_name": "punk rock", "target_name": "rock music", "weight": 2.0, "year": 2005}, {"source": "24", "target": "78", "source_name": "punk rock", "target_name": "hip hop", "weight": 1.0, "year": 2005}, {"source": "24", "target": "80", "source_name": "punk rock", "target_name": "folk music", "weight": 1.0, "year": 2005}, {"source": "24", "target": "82", "source_name": "punk rock", "target_name": "heavy metal", "weight": 1.0, "year": 2005}, {"source": "25", "target": "53", "source_name": "russian rock", "target_name": "popular music", "weight": 1.0, "year": 2005}, {"source": "25", "target": "77", "source_name": "russian rock", "target_name": "rock music", "weight": 1.0, "year": 2005}, {"source": "28", "target": "37", "source_name": "high school", "target_name": "middle ages", "weight": 1.0, "year": 2005}, {"source": "28", "target": "77", "source_name": "high school", "target_name": "rock music", "weight": 2.0, "year": 2005}, {"source": "28", "target": "82", "source_name": "high school", "target_name": "heavy metal", "weight": 1.0, "year": 2005}, {"source": "29", "target": "36", "source_name": "rolling stone", "target_name": "music industry", "weight": 1.0, "year": 2005}, {"source": "29", "target": "42", "source_name": "rolling stone", "target_name": "simon frith", "weight": 1.0, "year": 2005}, {"source": "29", "target": "48", "source_name": "rolling stone", "target_name": "pop music", "weight": 1.0, "year": 2005}, {"source": "29", "target": "53", "source_name": "rolling stone", "target_name": "popular music", "weight": 2.0, "year": 2005}, {"source": "29", "target": "55", "source_name": "rolling stone", "target_name": "rock criticism", "weight": 1.0, "year": 2005}, {"source": "29", "target": "56", "source_name": "rolling stone", "target_name": "bruce springsteen", "weight": 1.0, "year": 2005}, {"source": "29", "target": "72", "source_name": "rolling stone", "target_name": "jimi hendrix", "weight": 1.0, "year": 2005}, {"source": "29", "target": "74", "source_name": "rolling stone", "target_name": "united states", "weight": 1.0, "year": 2005}, {"source": "29", "target": "77", "source_name": "rolling stone", "target_name": "rock music", "weight": 3.0, "year": 2005}, {"source": "30", "target": "36", "source_name": "rock band", "target_name": "music industry", "weight": 1.0, "year": 2005}, {"source": "30", "target": "53", "source_name": "rock band", "target_name": "popular music", "weight": 6.0, "year": 2005}, {"source": "30", "target": "61", "source_name": "rock band", "target_name": "progressive rock", "weight": 3.0, "year": 2005}, {"source": "30", "target": "65", "source_name": "rock band", "target_name": "country music", "weight": 1.0, "year": 2005}, {"source": "30", "target": "69", "source_name": "rock band", "target_name": "classical music", "weight": 1.0, "year": 2005}, {"source": "30", "target": "72", "source_name": "rock band", "target_name": "jimi hendrix", "weight": 1.0, "year": 2005}, {"source": "30", "target": "73", "source_name": "rock band", "target_name": "southern rock", "weight": 2.0, "year": 2005}, {"source": "30", "target": "74", "source_name": "rock band", "target_name": "united states", "weight": 1.0, "year": 2005}, {"source": "30", "target": "77", "source_name": "rock band", "target_name": "rock music", "weight": 7.0, "year": 2005}, {"source": "30", "target": "80", "source_name": "rock band", "target_name": "folk music", "weight": 1.0, "year": 2005}, {"source": "30", "target": "82", "source_name": "rock band", "target_name": "heavy metal", "weight": 1.0, "year": 2005}, {"source": "33", "target": "53", "source_name": "jesus christ", "target_name": "popular music", "weight": 1.0, "year": 2005}, {"source": "33", "target": "77", "source_name": "jesus christ", "target_name": "rock music", "weight": 1.0, "year": 2005}, {"source": "34", "target": "40", "source_name": "mass media", "target_name": "musical instruments", "weight": 1.0, "year": 2005}, {"source": "34", "target": "46", "source_name": "mass media", "target_name": "music festival", "weight": 1.0, "year": 2005}, {"source": "34", "target": "48", "source_name": "mass media", "target_name": "pop music", "weight": 1.0, "year": 2005}, {"source": "34", "target": "51", "source_name": "mass media", "target_name": "cultural identity", "weight": 1.0, "year": 2005}, {"source": "34", "target": "52", "source_name": "mass media", "target_name": "folk song", "weight": 2.0, "year": 2005}, {"source": "34", "target": "53", "source_name": "mass media", "target_name": "popular music", "weight": 3.0, "year": 2005}, {"source": "34", "target": "66", "source_name": "mass media", "target_name": "hong kong", "weight": 1.0, "year": 2005}, {"source": "34", "target": "69", "source_name": "mass media", "target_name": "classical music", "weight": 1.0, "year": 2005}, {"source": "34", "target": "77", "source_name": "mass media", "target_name": "rock music", "weight": 1.0, "year": 2005}, {"source": "35", "target": "43", "source_name": "ancient greek", "target_name": "music education", "weight": 1.0, "year": 2005}, {"source": "35", "target": "65", "source_name": "ancient greek", "target_name": "country music", "weight": 1.0, "year": 2005}, {"source": "35", "target": "77", "source_name": "ancient greek", "target_name": "rock music", "weight": 1.0, "year": 2005}, {"source": "35", "target": "80", "source_name": "ancient greek", "target_name": "folk music", "weight": 1.0, "year": 2005}, {"source": "35", "target": "89", "source_name": "ancient greek", "target_name": "electronic music", "weight": 1.0, "year": 2005}, {"source": "36", "target": "41", "source_name": "music industry", "target_name": "youth culture", "weight": 1.0, "year": 2005}, {"source": "36", "target": "42", "source_name": "music industry", "target_name": "simon frith", "weight": 1.0, "year": 2005}, {"source": "36", "target": "43", "source_name": "music industry", "target_name": "music education", "weight": 1.0, "year": 2005}, {"source": "36", "target": "48", "source_name": "music industry", "target_name": "pop music", "weight": 5.0, "year": 2005}, {"source": "36", "target": "51", "source_name": "music industry", "target_name": "cultural identity", "weight": 1.0, "year": 2005}, {"source": "36", "target": "53", "source_name": "music industry", "target_name": "popular music", "weight": 16.0, "year": 2005}, {"source": "36", "target": "61", "source_name": "music industry", "target_name": "progressive rock", "weight": 1.0, "year": 2005}, {"source": "36", "target": "65", "source_name": "music industry", "target_name": "country music", "weight": 1.0, "year": 2005}, {"source": "36", "target": "66", "source_name": "music industry", "target_name": "hong kong", "weight": 1.0, "year": 2005}, {"source": "36", "target": "67", "source_name": "music industry", "target_name": "rock art", "weight": 1.0, "year": 2005}, {"source": "36", "target": "68", "source_name": "music industry", "target_name": "hearing loss", "weight": 1.0, "year": 2005}, {"source": "36", "target": "69", "source_name": "music industry", "target_name": "classical music", "weight": 2.0, "year": 2005}, {"source": "36", "target": "72", "source_name": "music industry", "target_name": "jimi hendrix", "weight": 3.0, "year": 2005}, {"source": "36", "target": "74", "source_name": "music industry", "target_name": "united states", "weight": 2.0, "year": 2005}, {"source": "36", "target": "76", "source_name": "music industry", "target_name": "los angeles", "weight": 2.0, "year": 2005}, {"source": "36", "target": "77", "source_name": "music industry", "target_name": "rock music", "weight": 9.0, "year": 2005}, {"source": "36", "target": "78", "source_name": "music industry", "target_name": "hip hop", "weight": 3.0, "year": 2005}, {"source": "36", "target": "79", "source_name": "music industry", "target_name": "popular culture", "weight": 4.0, "year": 2005}, {"source": "36", "target": "80", "source_name": "music industry", "target_name": "folk music", "weight": 1.0, "year": 2005}, {"source": "36", "target": "83", "source_name": "music industry", "target_name": "folk rock", "weight": 1.0, "year": 2005}, {"source": "37", "target": "58", "source_name": "middle ages", "target_name": "music therapy", "weight": 1.0, "year": 2005}, {"source": "37", "target": "69", "source_name": "middle ages", "target_name": "classical music", "weight": 1.0, "year": 2005}, {"source": "37", "target": "77", "source_name": "middle ages", "target_name": "rock music", "weight": 1.0, "year": 2005}, {"source": "37", "target": "80", "source_name": "middle ages", "target_name": "folk music", "weight": 2.0, "year": 2005}, {"source": "40", "target": "43", "source_name": "musical instruments", "target_name": "music education", "weight": 1.0, "year": 2005}, {"source": "40", "target": "49", "source_name": "musical instruments", "target_name": "music theory", "weight": 1.0, "year": 2005}, {"source": "40", "target": "53", "source_name": "musical instruments", "target_name": "popular music", "weight": 1.0, "year": 2005}, {"source": "40", "target": "54", "source_name": "musical instruments", "target_name": "american popular music", "weight": 1.0, "year": 2005}, {"source": "40", "target": "70", "source_name": "musical instruments", "target_name": "world war", "weight": 1.0, "year": 2005}, {"source": "40", "target": "74", "source_name": "musical instruments", "target_name": "united states", "weight": 1.0, "year": 2005}, {"source": "40", "target": "75", "source_name": "musical instruments", "target_name": "world war ii", "weight": 1.0, "year": 2005}, {"source": "40", "target": "89", "source_name": "musical instruments", "target_name": "electronic music", "weight": 1.0, "year": 2005}, {"source": "41", "target": "48", "source_name": "youth culture", "target_name": "pop music", "weight": 3.0, "year": 2005}, {"source": "41", "target": "51", "source_name": "youth culture", "target_name": "cultural identity", "weight": 2.0, "year": 2005}, {"source": "41", "target": "53", "source_name": "youth culture", "target_name": "popular music", "weight": 2.0, "year": 2005}, {"source": "41", "target": "60", "source_name": "youth culture", "target_name": "cultural studies", "weight": 2.0, "year": 2005}, {"source": "41", "target": "66", "source_name": "youth culture", "target_name": "hong kong", "weight": 1.0, "year": 2005}, {"source": "41", "target": "75", "source_name": "youth culture", "target_name": "world war ii", "weight": 1.0, "year": 2005}, {"source": "41", "target": "77", "source_name": "youth culture", "target_name": "rock music", "weight": 2.0, "year": 2005}, {"source": "42", "target": "48", "source_name": "simon frith", "target_name": "pop music", "weight": 6.0, "year": 2005}, {"source": "42", "target": "51", "source_name": "simon frith", "target_name": "cultural identity", "weight": 1.0, "year": 2005}, {"source": "42", "target": "53", "source_name": "simon frith", "target_name": "popular music", "weight": 4.0, "year": 2005}, {"source": "42", "target": "55", "source_name": "simon frith", "target_name": "rock criticism", "weight": 2.0, "year": 2005}, {"source": "42", "target": "57", "source_name": "simon frith", "target_name": "north america", "weight": 1.0, "year": 2005}, {"source": "42", "target": "60", "source_name": "simon frith", "target_name": "cultural studies", "weight": 1.0, "year": 2005}, {"source": "42", "target": "65", "source_name": "simon frith", "target_name": "country music", "weight": 1.0, "year": 2005}, {"source": "42", "target": "72", "source_name": "simon frith", "target_name": "jimi hendrix", "weight": 1.0, "year": 2005}, {"source": "42", "target": "76", "source_name": "simon frith", "target_name": "los angeles", "weight": 1.0, "year": 2005}, {"source": "42", "target": "77", "source_name": "simon frith", "target_name": "rock music", "weight": 2.0, "year": 2005}, {"source": "42", "target": "79", "source_name": "simon frith", "target_name": "popular culture", "weight": 1.0, "year": 2005}, {"source": "43", "target": "49", "source_name": "music education", "target_name": "music theory", "weight": 2.0, "year": 2005}, {"source": "43", "target": "53", "source_name": "music education", "target_name": "popular music", "weight": 4.0, "year": 2005}, {"source": "43", "target": "60", "source_name": "music education", "target_name": "cultural studies", "weight": 1.0, "year": 2005}, {"source": "43", "target": "77", "source_name": "music education", "target_name": "rock music", "weight": 1.0, "year": 2005}, {"source": "43", "target": "80", "source_name": "music education", "target_name": "folk music", "weight": 3.0, "year": 2005}, {"source": "44", "target": "53", "source_name": "alternative rock", "target_name": "popular music", "weight": 5.0, "year": 2005}, {"source": "44", "target": "57", "source_name": "alternative rock", "target_name": "north america", "weight": 3.0, "year": 2005}, {"source": "44", "target": "65", "source_name": "alternative rock", "target_name": "country music", "weight": 2.0, "year": 2005}, {"source": "44", "target": "67", "source_name": "alternative rock", "target_name": "rock art", "weight": 1.0, "year": 2005}, {"source": "44", "target": "73", "source_name": "alternative rock", "target_name": "southern rock", "weight": 1.0, "year": 2005}, {"source": "44", "target": "74", "source_name": "alternative rock", "target_name": "united states", "weight": 2.0, "year": 2005}, {"source": "44", "target": "77", "source_name": "alternative rock", "target_name": "rock music", "weight": 3.0, "year": 2005}, {"source": "44", "target": "78", "source_name": "alternative rock", "target_name": "hip hop", "weight": 1.0, "year": 2005}, {"source": "44", "target": "80", "source_name": "alternative rock", "target_name": "folk music", "weight": 1.0, "year": 2005}, {"source": "47", "target": "48", "source_name": "hard rock", "target_name": "pop music", "weight": 1.0, "year": 2005}, {"source": "47", "target": "57", "source_name": "hard rock", "target_name": "north america", "weight": 1.0, "year": 2005}, {"source": "47", "target": "77", "source_name": "hard rock", "target_name": "rock music", "weight": 2.0, "year": 2005}, {"source": "47", "target": "79", "source_name": "hard rock", "target_name": "popular culture", "weight": 1.0, "year": 2005}, {"source": "48", "target": "51", "source_name": "pop music", "target_name": "cultural identity", "weight": 3.0, "year": 2005}, {"source": "48", "target": "52", "source_name": "pop music", "target_name": "folk song", "weight": 1.0, "year": 2005}, {"source": "48", "target": "53", "source_name": "pop music", "target_name": "popular music", "weight": 12.0, "year": 2005}, {"source": "48", "target": "55", "source_name": "pop music", "target_name": "rock criticism", "weight": 2.0, "year": 2005}, {"source": "48", "target": "57", "source_name": "pop music", "target_name": "north america", "weight": 2.0, "year": 2005}, {"source": "48", "target": "60", "source_name": "pop music", "target_name": "cultural studies", "weight": 1.0, "year": 2005}, {"source": "48", "target": "64", "source_name": "pop music", "target_name": "english language", "weight": 1.0, "year": 2005}, {"source": "48", "target": "65", "source_name": "pop music", "target_name": "country music", "weight": 1.0, "year": 2005}, {"source": "48", "target": "66", "source_name": "pop music", "target_name": "hong kong", "weight": 2.0, "year": 2005}, {"source": "48", "target": "67", "source_name": "pop music", "target_name": "rock art", "weight": 1.0, "year": 2005}, {"source": "48", "target": "70", "source_name": "pop music", "target_name": "world war", "weight": 2.0, "year": 2005}, {"source": "48", "target": "71", "source_name": "pop music", "target_name": "latin american", "weight": 1.0, "year": 2005}, {"source": "48", "target": "72", "source_name": "pop music", "target_name": "jimi hendrix", "weight": 2.0, "year": 2005}, {"source": "48", "target": "74", "source_name": "pop music", "target_name": "united states", "weight": 4.0, "year": 2005}, {"source": "48", "target": "77", "source_name": "pop music", "target_name": "rock music", "weight": 12.0, "year": 2005}, {"source": "48", "target": "78", "source_name": "pop music", "target_name": "hip hop", "weight": 1.0, "year": 2005}, {"source": "48", "target": "79", "source_name": "pop music", "target_name": "popular culture", "weight": 2.0, "year": 2005}, {"source": "48", "target": "82", "source_name": "pop music", "target_name": "heavy metal", "weight": 1.0, "year": 2005}, {"source": "48", "target": "83", "source_name": "pop music", "target_name": "folk rock", "weight": 1.0, "year": 2005}, {"source": "49", "target": "53", "source_name": "music theory", "target_name": "popular music", "weight": 2.0, "year": 2005}, {"source": "49", "target": "57", "source_name": "music theory", "target_name": "north america", "weight": 2.0, "year": 2005}, {"source": "49", "target": "72", "source_name": "music theory", "target_name": "jimi hendrix", "weight": 1.0, "year": 2005}, {"source": "49", "target": "77", "source_name": "music theory", "target_name": "rock music", "weight": 2.0, "year": 2005}, {"source": "50", "target": "53", "source_name": "hollywood film", "target_name": "popular music", "weight": 1.0, "year": 2005}, {"source": "50", "target": "79", "source_name": "hollywood film", "target_name": "popular culture", "weight": 1.0, "year": 2005}, {"source": "51", "target": "52", "source_name": "cultural identity", "target_name": "folk song", "weight": 1.0, "year": 2005}, {"source": "51", "target": "53", "source_name": "cultural identity", "target_name": "popular music", "weight": 2.0, "year": 2005}, {"source": "51", "target": "60", "source_name": "cultural identity", "target_name": "cultural studies", "weight": 2.0, "year": 2005}, {"source": "51", "target": "66", "source_name": "cultural identity", "target_name": "hong kong", "weight": 1.0, "year": 2005}, {"source": "51", "target": "72", "source_name": "cultural identity", "target_name": "jimi hendrix", "weight": 1.0, "year": 2005}, {"source": "51", "target": "74", "source_name": "cultural identity", "target_name": "united states", "weight": 2.0, "year": 2005}, {"source": "51", "target": "77", "source_name": "cultural identity", "target_name": "rock music", "weight": 6.0, "year": 2005}, {"source": "51", "target": "79", "source_name": "cultural identity", "target_name": "popular culture", "weight": 1.0, "year": 2005}, {"source": "52", "target": "53", "source_name": "folk song", "target_name": "popular music", "weight": 3.0, "year": 2005}, {"source": "52", "target": "66", "source_name": "folk song", "target_name": "hong kong", "weight": 1.0, "year": 2005}, {"source": "52", "target": "69", "source_name": "folk song", "target_name": "classical music", "weight": 1.0, "year": 2005}, {"source": "52", "target": "77", "source_name": "folk song", "target_name": "rock music", "weight": 1.0, "year": 2005}, {"source": "52", "target": "80", "source_name": "folk song", "target_name": "folk music", "weight": 1.0, "year": 2005}, {"source": "53", "target": "54", "source_name": "popular music", "target_name": "american popular music", "weight": 5.0, "year": 2005}, {"source": "53", "target": "55", "source_name": "popular music", "target_name": "rock criticism", "weight": 2.0, "year": 2005}, {"source": "53", "target": "56", "source_name": "popular music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2005}, {"source": "53", "target": "57", "source_name": "popular music", "target_name": "north america", "weight": 5.0, "year": 2005}, {"source": "53", "target": "58", "source_name": "popular music", "target_name": "music therapy", "weight": 1.0, "year": 2005}, {"source": "53", "target": "59", "source_name": "popular music", "target_name": "college students", "weight": 1.0, "year": 2005}, {"source": "53", "target": "60", "source_name": "popular music", "target_name": "cultural studies", "weight": 5.0, "year": 2005}, {"source": "53", "target": "61", "source_name": "popular music", "target_name": "progressive rock", "weight": 3.0, "year": 2005}, {"source": "53", "target": "62", "source_name": "popular music", "target_name": "led zeppelin", "weight": 1.0, "year": 2005}, {"source": "53", "target": "65", "source_name": "popular music", "target_name": "country music", "weight": 6.0, "year": 2005}, {"source": "53", "target": "66", "source_name": "popular music", "target_name": "hong kong", "weight": 2.0, "year": 2005}, {"source": "53", "target": "67", "source_name": "popular music", "target_name": "rock art", "weight": 2.0, "year": 2005}, {"source": "53", "target": "69", "source_name": "popular music", "target_name": "classical music", "weight": 6.0, "year": 2005}, {"source": "53", "target": "70", "source_name": "popular music", "target_name": "world war", "weight": 3.0, "year": 2005}, {"source": "53", "target": "71", "source_name": "popular music", "target_name": "latin american", "weight": 2.0, "year": 2005}, {"source": "53", "target": "72", "source_name": "popular music", "target_name": "jimi hendrix", "weight": 3.0, "year": 2005}, {"source": "53", "target": "73", "source_name": "popular music", "target_name": "southern rock", "weight": 2.0, "year": 2005}, {"source": "53", "target": "74", "source_name": "popular music", "target_name": "united states", "weight": 11.0, "year": 2005}, {"source": "53", "target": "75", "source_name": "popular music", "target_name": "world war ii", "weight": 2.0, "year": 2005}, {"source": "53", "target": "76", "source_name": "popular music", "target_name": "los angeles", "weight": 5.0, "year": 2005}, {"source": "53", "target": "77", "source_name": "popular music", "target_name": "rock music", "weight": 39.0, "year": 2005}, {"source": "53", "target": "78", "source_name": "popular music", "target_name": "hip hop", "weight": 4.0, "year": 2005}, {"source": "53", "target": "79", "source_name": "popular music", "target_name": "popular culture", "weight": 11.0, "year": 2005}, {"source": "53", "target": "80", "source_name": "popular music", "target_name": "folk music", "weight": 6.0, "year": 2005}, {"source": "53", "target": "82", "source_name": "popular music", "target_name": "heavy metal", "weight": 4.0, "year": 2005}, {"source": "53", "target": "83", "source_name": "popular music", "target_name": "folk rock", "weight": 1.0, "year": 2005}, {"source": "53", "target": "85", "source_name": "popular music", "target_name": "jewish music", "weight": 1.0, "year": 2005}, {"source": "53", "target": "87", "source_name": "popular music", "target_name": "music hall", "weight": 1.0, "year": 2005}, {"source": "53", "target": "88", "source_name": "popular music", "target_name": "oxford university press", "weight": 2.0, "year": 2005}, {"source": "53", "target": "89", "source_name": "popular music", "target_name": "electronic music", "weight": 1.0, "year": 2005}, {"source": "54", "target": "65", "source_name": "american popular music", "target_name": "country music", "weight": 2.0, "year": 2005}, {"source": "54", "target": "69", "source_name": "american popular music", "target_name": "classical music", "weight": 1.0, "year": 2005}, {"source": "54", "target": "71", "source_name": "american popular music", "target_name": "latin american", "weight": 1.0, "year": 2005}, {"source": "54", "target": "74", "source_name": "american popular music", "target_name": "united states", "weight": 2.0, "year": 2005}, {"source": "54", "target": "76", "source_name": "american popular music", "target_name": "los angeles", "weight": 1.0, "year": 2005}, {"source": "54", "target": "79", "source_name": "american popular music", "target_name": "popular culture", "weight": 1.0, "year": 2005}, {"source": "55", "target": "57", "source_name": "rock criticism", "target_name": "north america", "weight": 1.0, "year": 2005}, {"source": "55", "target": "61", "source_name": "rock criticism", "target_name": "progressive rock", "weight": 1.0, "year": 2005}, {"source": "55", "target": "65", "source_name": "rock criticism", "target_name": "country music", "weight": 1.0, "year": 2005}, {"source": "55", "target": "74", "source_name": "rock criticism", "target_name": "united states", "weight": 1.0, "year": 2005}, {"source": "55", "target": "77", "source_name": "rock criticism", "target_name": "rock music", "weight": 1.0, "year": 2005}, {"source": "56", "target": "72", "source_name": "bruce springsteen", "target_name": "jimi hendrix", "weight": 1.0, "year": 2005}, {"source": "56", "target": "77", "source_name": "bruce springsteen", "target_name": "rock music", "weight": 2.0, "year": 2005}, {"source": "56", "target": "79", "source_name": "bruce springsteen", "target_name": "popular culture", "weight": 1.0, "year": 2005}, {"source": "57", "target": "65", "source_name": "north america", "target_name": "country music", "weight": 2.0, "year": 2005}, {"source": "57", "target": "71", "source_name": "north america", "target_name": "latin american", "weight": 1.0, "year": 2005}, {"source": "57", "target": "73", "source_name": "north america", "target_name": "southern rock", "weight": 1.0, "year": 2005}, {"source": "57", "target": "74", "source_name": "north america", "target_name": "united states", "weight": 3.0, "year": 2005}, {"source": "57", "target": "77", "source_name": "north america", "target_name": "rock music", "weight": 2.0, "year": 2005}, {"source": "57", "target": "78", "source_name": "north america", "target_name": "hip hop", "weight": 1.0, "year": 2005}, {"source": "57", "target": "80", "source_name": "north america", "target_name": "folk music", "weight": 2.0, "year": 2005}, {"source": "58", "target": "64", "source_name": "music therapy", "target_name": "english language", "weight": 1.0, "year": 2005}, {"source": "58", "target": "77", "source_name": "music therapy", "target_name": "rock music", "weight": 3.0, "year": 2005}, {"source": "59", "target": "74", "source_name": "college students", "target_name": "united states", "weight": 1.0, "year": 2005}, {"source": "60", "target": "62", "source_name": "cultural studies", "target_name": "led zeppelin", "weight": 1.0, "year": 2005}, {"source": "60", "target": "71", "source_name": "cultural studies", "target_name": "latin american", "weight": 1.0, "year": 2005}, {"source": "60", "target": "76", "source_name": "cultural studies", "target_name": "los angeles", "weight": 1.0, "year": 2005}, {"source": "60", "target": "77", "source_name": "cultural studies", "target_name": "rock music", "weight": 5.0, "year": 2005}, {"source": "60", "target": "79", "source_name": "cultural studies", "target_name": "popular culture", "weight": 4.0, "year": 2005}, {"source": "60", "target": "80", "source_name": "cultural studies", "target_name": "folk music", "weight": 1.0, "year": 2005}, {"source": "60", "target": "85", "source_name": "cultural studies", "target_name": "jewish music", "weight": 1.0, "year": 2005}, {"source": "60", "target": "87", "source_name": "cultural studies", "target_name": "music hall", "weight": 1.0, "year": 2005}, {"source": "60", "target": "88", "source_name": "cultural studies", "target_name": "oxford university press", "weight": 2.0, "year": 2005}, {"source": "61", "target": "69", "source_name": "progressive rock", "target_name": "classical music", "weight": 2.0, "year": 2005}, {"source": "61", "target": "72", "source_name": "progressive rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2005}, {"source": "61", "target": "74", "source_name": "progressive rock", "target_name": "united states", "weight": 1.0, "year": 2005}, {"source": "61", "target": "77", "source_name": "progressive rock", "target_name": "rock music", "weight": 7.0, "year": 2005}, {"source": "61", "target": "82", "source_name": "progressive rock", "target_name": "heavy metal", "weight": 1.0, "year": 2005}, {"source": "61", "target": "89", "source_name": "progressive rock", "target_name": "electronic music", "weight": 1.0, "year": 2005}, {"source": "62", "target": "77", "source_name": "led zeppelin", "target_name": "rock music", "weight": 1.0, "year": 2005}, {"source": "62", "target": "88", "source_name": "led zeppelin", "target_name": "oxford university press", "weight": 1.0, "year": 2005}, {"source": "64", "target": "70", "source_name": "english language", "target_name": "world war", "weight": 1.0, "year": 2005}, {"source": "64", "target": "74", "source_name": "english language", "target_name": "united states", "weight": 1.0, "year": 2005}, {"source": "64", "target": "77", "source_name": "english language", "target_name": "rock music", "weight": 2.0, "year": 2005}, {"source": "64", "target": "79", "source_name": "english language", "target_name": "popular culture", "weight": 1.0, "year": 2005}, {"source": "65", "target": "73", "source_name": "country music", "target_name": "southern rock", "weight": 2.0, "year": 2005}, {"source": "65", "target": "74", "source_name": "country music", "target_name": "united states", "weight": 1.0, "year": 2005}, {"source": "65", "target": "77", "source_name": "country music", "target_name": "rock music", "weight": 3.0, "year": 2005}, {"source": "65", "target": "80", "source_name": "country music", "target_name": "folk music", "weight": 2.0, "year": 2005}, {"source": "65", "target": "89", "source_name": "country music", "target_name": "electronic music", "weight": 1.0, "year": 2005}, {"source": "66", "target": "77", "source_name": "hong kong", "target_name": "rock music", "weight": 2.0, "year": 2005}, {"source": "67", "target": "77", "source_name": "rock art", "target_name": "rock music", "weight": 2.0, "year": 2005}, {"source": "68", "target": "77", "source_name": "hearing loss", "target_name": "rock music", "weight": 2.0, "year": 2005}, {"source": "69", "target": "71", "source_name": "classical music", "target_name": "latin american", "weight": 1.0, "year": 2005}, {"source": "69", "target": "72", "source_name": "classical music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2005}, {"source": "69", "target": "74", "source_name": "classical music", "target_name": "united states", "weight": 3.0, "year": 2005}, {"source": "69", "target": "76", "source_name": "classical music", "target_name": "los angeles", "weight": 1.0, "year": 2005}, {"source": "69", "target": "77", "source_name": "classical music", "target_name": "rock music", "weight": 11.0, "year": 2005}, {"source": "69", "target": "78", "source_name": "classical music", "target_name": "hip hop", "weight": 1.0, "year": 2005}, {"source": "69", "target": "79", "source_name": "classical music", "target_name": "popular culture", "weight": 1.0, "year": 2005}, {"source": "69", "target": "80", "source_name": "classical music", "target_name": "folk music", "weight": 1.0, "year": 2005}, {"source": "69", "target": "89", "source_name": "classical music", "target_name": "electronic music", "weight": 1.0, "year": 2005}, {"source": "70", "target": "74", "source_name": "world war", "target_name": "united states", "weight": 2.0, "year": 2005}, {"source": "70", "target": "75", "source_name": "world war", "target_name": "world war ii", "weight": 1.0, "year": 2005}, {"source": "70", "target": "77", "source_name": "world war", "target_name": "rock music", "weight": 3.0, "year": 2005}, {"source": "70", "target": "79", "source_name": "world war", "target_name": "popular culture", "weight": 1.0, "year": 2005}, {"source": "70", "target": "80", "source_name": "world war", "target_name": "folk music", "weight": 1.0, "year": 2005}, {"source": "70", "target": "87", "source_name": "world war", "target_name": "music hall", "weight": 1.0, "year": 2005}, {"source": "70", "target": "89", "source_name": "world war", "target_name": "electronic music", "weight": 1.0, "year": 2005}, {"source": "71", "target": "74", "source_name": "latin american", "target_name": "united states", "weight": 3.0, "year": 2005}, {"source": "71", "target": "76", "source_name": "latin american", "target_name": "los angeles", "weight": 1.0, "year": 2005}, {"source": "71", "target": "77", "source_name": "latin american", "target_name": "rock music", "weight": 3.0, "year": 2005}, {"source": "71", "target": "79", "source_name": "latin american", "target_name": "popular culture", "weight": 1.0, "year": 2005}, {"source": "72", "target": "74", "source_name": "jimi hendrix", "target_name": "united states", "weight": 1.0, "year": 2005}, {"source": "72", "target": "77", "source_name": "jimi hendrix", "target_name": "rock music", "weight": 4.0, "year": 2005}, {"source": "72", "target": "79", "source_name": "jimi hendrix", "target_name": "popular culture", "weight": 1.0, "year": 2005}, {"source": "72", "target": "89", "source_name": "jimi hendrix", "target_name": "electronic music", "weight": 1.0, "year": 2005}, {"source": "73", "target": "77", "source_name": "southern rock", "target_name": "rock music", "weight": 1.0, "year": 2005}, {"source": "73", "target": "80", "source_name": "southern rock", "target_name": "folk music", "weight": 1.0, "year": 2005}, {"source": "74", "target": "76", "source_name": "united states", "target_name": "los angeles", "weight": 1.0, "year": 2005}, {"source": "74", "target": "77", "source_name": "united states", "target_name": "rock music", "weight": 8.0, "year": 2005}, {"source": "74", "target": "78", "source_name": "united states", "target_name": "hip hop", "weight": 1.0, "year": 2005}, {"source": "74", "target": "79", "source_name": "united states", "target_name": "popular culture", "weight": 2.0, "year": 2005}, {"source": "74", "target": "80", "source_name": "united states", "target_name": "folk music", "weight": 2.0, "year": 2005}, {"source": "76", "target": "77", "source_name": "los angeles", "target_name": "rock music", "weight": 3.0, "year": 2005}, {"source": "76", "target": "79", "source_name": "los angeles", "target_name": "popular culture", "weight": 1.0, "year": 2005}, {"source": "77", "target": "78", "source_name": "rock music", "target_name": "hip hop", "weight": 2.0, "year": 2005}, {"source": "77", "target": "79", "source_name": "rock music", "target_name": "popular culture", "weight": 7.0, "year": 2005}, {"source": "77", "target": "80", "source_name": "rock music", "target_name": "folk music", "weight": 1.0, "year": 2005}, {"source": "77", "target": "82", "source_name": "rock music", "target_name": "heavy metal", "weight": 4.0, "year": 2005}, {"source": "77", "target": "88", "source_name": "rock music", "target_name": "oxford university press", "weight": 1.0, "year": 2005}, {"source": "77", "target": "89", "source_name": "rock music", "target_name": "electronic music", "weight": 3.0, "year": 2005}, {"source": "78", "target": "79", "source_name": "hip hop", "target_name": "popular culture", "weight": 1.0, "year": 2005}, {"source": "78", "target": "80", "source_name": "hip hop", "target_name": "folk music", "weight": 1.0, "year": 2005}, {"source": "78", "target": "82", "source_name": "hip hop", "target_name": "heavy metal", "weight": 1.0, "year": 2005}, {"source": "79", "target": "80", "source_name": "popular culture", "target_name": "folk music", "weight": 2.0, "year": 2005}, {"source": "79", "target": "82", "source_name": "popular culture", "target_name": "heavy metal", "weight": 1.0, "year": 2005}, {"source": "79", "target": "85", "source_name": "popular culture", "target_name": "jewish music", "weight": 1.0, "year": 2005}, {"source": "79", "target": "87", "source_name": "popular culture", "target_name": "music hall", "weight": 2.0, "year": 2005}, {"source": "79", "target": "88", "source_name": "popular culture", "target_name": "oxford university press", "weight": 1.0, "year": 2005}, {"source": "80", "target": "85", "source_name": "folk music", "target_name": "jewish music", "weight": 1.0, "year": 2005}, {"source": "80", "target": "87", "source_name": "folk music", "target_name": "music hall", "weight": 1.0, "year": 2005}, {"source": "80", "target": "88", "source_name": "folk music", "target_name": "oxford university press", "weight": 1.0, "year": 2005}, {"source": "80", "target": "89", "source_name": "folk music", "target_name": "electronic music", "weight": 1.0, "year": 2005}, {"source": "85", "target": "88", "source_name": "jewish music", "target_name": "oxford university press", "weight": 1.0, "year": 2005}]}, {"2006": [{"source": "1", "target": "9", "source_name": "rock star", "target_name": "compact disc", "weight": 1.0, "year": 2006}, {"source": "1", "target": "28", "source_name": "rock star", "target_name": "high school", "weight": 1.0, "year": 2006}, {"source": "1", "target": "29", "source_name": "rock star", "target_name": "rolling stone", "weight": 1.0, "year": 2006}, {"source": "1", "target": "36", "source_name": "rock star", "target_name": "music industry", "weight": 2.0, "year": 2006}, {"source": "1", "target": "41", "source_name": "rock star", "target_name": "youth culture", "weight": 1.0, "year": 2006}, {"source": "1", "target": "48", "source_name": "rock star", "target_name": "pop music", "weight": 3.0, "year": 2006}, {"source": "1", "target": "51", "source_name": "rock star", "target_name": "cultural identity", "weight": 1.0, "year": 2006}, {"source": "1", "target": "53", "source_name": "rock star", "target_name": "popular music", "weight": 2.0, "year": 2006}, {"source": "1", "target": "69", "source_name": "rock star", "target_name": "classical music", "weight": 1.0, "year": 2006}, {"source": "1", "target": "74", "source_name": "rock star", "target_name": "united states", "weight": 1.0, "year": 2006}, {"source": "1", "target": "77", "source_name": "rock star", "target_name": "rock music", "weight": 6.0, "year": 2006}, {"source": "1", "target": "82", "source_name": "rock star", "target_name": "heavy metal", "weight": 2.0, "year": 2006}, {"source": "2", "target": "19", "source_name": "indie rock", "target_name": "music video", "weight": 1.0, "year": 2006}, {"source": "2", "target": "48", "source_name": "indie rock", "target_name": "pop music", "weight": 1.0, "year": 2006}, {"source": "2", "target": "51", "source_name": "indie rock", "target_name": "cultural identity", "weight": 1.0, "year": 2006}, {"source": "2", "target": "72", "source_name": "indie rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2006}, {"source": "2", "target": "74", "source_name": "indie rock", "target_name": "united states", "weight": 1.0, "year": 2006}, {"source": "2", "target": "77", "source_name": "indie rock", "target_name": "rock music", "weight": 1.0, "year": 2006}, {"source": "3", "target": "79", "source_name": "glam rock", "target_name": "popular culture", "weight": 1.0, "year": 2006}, {"source": "4", "target": "9", "source_name": "gregorian chant", "target_name": "compact disc", "weight": 1.0, "year": 2006}, {"source": "4", "target": "37", "source_name": "gregorian chant", "target_name": "middle ages", "weight": 1.0, "year": 2006}, {"source": "5", "target": "12", "source_name": "jesus christ superstar", "target_name": "rock opera", "weight": 1.0, "year": 2006}, {"source": "5", "target": "15", "source_name": "jesus christ superstar", "target_name": "musical theatre", "weight": 1.0, "year": 2006}, {"source": "5", "target": "33", "source_name": "jesus christ superstar", "target_name": "jesus christ", "weight": 1.0, "year": 2006}, {"source": "5", "target": "34", "source_name": "jesus christ superstar", "target_name": "mass media", "weight": 1.0, "year": 2006}, {"source": "5", "target": "53", "source_name": "jesus christ superstar", "target_name": "popular music", "weight": 1.0, "year": 2006}, {"source": "5", "target": "77", "source_name": "jesus christ superstar", "target_name": "rock music", "weight": 2.0, "year": 2006}, {"source": "6", "target": "10", "source_name": "elvis presley", "target_name": "african american", "weight": 1.0, "year": 2006}, {"source": "6", "target": "16", "source_name": "elvis presley", "target_name": "bob dylan", "weight": 1.0, "year": 2006}, {"source": "6", "target": "17", "source_name": "elvis presley", "target_name": "civil rights", "weight": 1.0, "year": 2006}, {"source": "6", "target": "29", "source_name": "elvis presley", "target_name": "rolling stone", "weight": 1.0, "year": 2006}, {"source": "6", "target": "36", "source_name": "elvis presley", "target_name": "music industry", "weight": 1.0, "year": 2006}, {"source": "6", "target": "40", "source_name": "elvis presley", "target_name": "musical instruments", "weight": 1.0, "year": 2006}, {"source": "6", "target": "41", "source_name": "elvis presley", "target_name": "youth culture", "weight": 1.0, "year": 2006}, {"source": "6", "target": "42", "source_name": "elvis presley", "target_name": "simon frith", "weight": 1.0, "year": 2006}, {"source": "6", "target": "48", "source_name": "elvis presley", "target_name": "pop music", "weight": 1.0, "year": 2006}, {"source": "6", "target": "51", "source_name": "elvis presley", "target_name": "cultural identity", "weight": 1.0, "year": 2006}, {"source": "6", "target": "53", "source_name": "elvis presley", "target_name": "popular music", "weight": 3.0, "year": 2006}, {"source": "6", "target": "54", "source_name": "elvis presley", "target_name": "american popular music", "weight": 1.0, "year": 2006}, {"source": "6", "target": "60", "source_name": "elvis presley", "target_name": "cultural studies", "weight": 1.0, "year": 2006}, {"source": "6", "target": "72", "source_name": "elvis presley", "target_name": "jimi hendrix", "weight": 1.0, "year": 2006}, {"source": "6", "target": "74", "source_name": "elvis presley", "target_name": "united states", "weight": 2.0, "year": 2006}, {"source": "6", "target": "77", "source_name": "elvis presley", "target_name": "rock music", "weight": 1.0, "year": 2006}, {"source": "6", "target": "79", "source_name": "elvis presley", "target_name": "popular culture", "weight": 1.0, "year": 2006}, {"source": "6", "target": "80", "source_name": "elvis presley", "target_name": "folk music", "weight": 1.0, "year": 2006}, {"source": "7", "target": "34", "source_name": "nineteenth century", "target_name": "mass media", "weight": 1.0, "year": 2006}, {"source": "7", "target": "43", "source_name": "nineteenth century", "target_name": "music education", "weight": 1.0, "year": 2006}, {"source": "7", "target": "52", "source_name": "nineteenth century", "target_name": "folk song", "weight": 1.0, "year": 2006}, {"source": "7", "target": "53", "source_name": "nineteenth century", "target_name": "popular music", "weight": 1.0, "year": 2006}, {"source": "7", "target": "69", "source_name": "nineteenth century", "target_name": "classical music", "weight": 1.0, "year": 2006}, {"source": "7", "target": "74", "source_name": "nineteenth century", "target_name": "united states", "weight": 1.0, "year": 2006}, {"source": "7", "target": "79", "source_name": "nineteenth century", "target_name": "popular culture", "weight": 1.0, "year": 2006}, {"source": "8", "target": "20", "source_name": "christian rock", "target_name": "garage rock", "weight": 1.0, "year": 2006}, {"source": "8", "target": "36", "source_name": "christian rock", "target_name": "music industry", "weight": 1.0, "year": 2006}, {"source": "8", "target": "44", "source_name": "christian rock", "target_name": "alternative rock", "weight": 1.0, "year": 2006}, {"source": "8", "target": "53", "source_name": "christian rock", "target_name": "popular music", "weight": 2.0, "year": 2006}, {"source": "8", "target": "57", "source_name": "christian rock", "target_name": "north america", "weight": 1.0, "year": 2006}, {"source": "8", "target": "65", "source_name": "christian rock", "target_name": "country music", "weight": 1.0, "year": 2006}, {"source": "8", "target": "73", "source_name": "christian rock", "target_name": "southern rock", "weight": 1.0, "year": 2006}, {"source": "8", "target": "77", "source_name": "christian rock", "target_name": "rock music", "weight": 1.0, "year": 2006}, {"source": "8", "target": "79", "source_name": "christian rock", "target_name": "popular culture", "weight": 1.0, "year": 2006}, {"source": "8", "target": "80", "source_name": "christian rock", "target_name": "folk music", "weight": 1.0, "year": 2006}, {"source": "9", "target": "10", "source_name": "compact disc", "target_name": "african american", "weight": 1.0, "year": 2006}, {"source": "9", "target": "24", "source_name": "compact disc", "target_name": "punk rock", "weight": 1.0, "year": 2006}, {"source": "9", "target": "29", "source_name": "compact disc", "target_name": "rolling stone", "weight": 1.0, "year": 2006}, {"source": "9", "target": "36", "source_name": "compact disc", "target_name": "music industry", "weight": 1.0, "year": 2006}, {"source": "9", "target": "37", "source_name": "compact disc", "target_name": "middle ages", "weight": 1.0, "year": 2006}, {"source": "9", "target": "48", "source_name": "compact disc", "target_name": "pop music", "weight": 1.0, "year": 2006}, {"source": "9", "target": "53", "source_name": "compact disc", "target_name": "popular music", "weight": 2.0, "year": 2006}, {"source": "9", "target": "74", "source_name": "compact disc", "target_name": "united states", "weight": 1.0, "year": 2006}, {"source": "9", "target": "77", "source_name": "compact disc", "target_name": "rock music", "weight": 1.0, "year": 2006}, {"source": "9", "target": "79", "source_name": "compact disc", "target_name": "popular culture", "weight": 1.0, "year": 2006}, {"source": "9", "target": "80", "source_name": "compact disc", "target_name": "folk music", "weight": 1.0, "year": 2006}, {"source": "10", "target": "15", "source_name": "african american", "target_name": "musical theatre", "weight": 1.0, "year": 2006}, {"source": "10", "target": "17", "source_name": "african american", "target_name": "civil rights", "weight": 1.0, "year": 2006}, {"source": "10", "target": "24", "source_name": "african american", "target_name": "punk rock", "weight": 1.0, "year": 2006}, {"source": "10", "target": "53", "source_name": "african american", "target_name": "popular music", "weight": 4.0, "year": 2006}, {"source": "10", "target": "74", "source_name": "african american", "target_name": "united states", "weight": 2.0, "year": 2006}, {"source": "10", "target": "78", "source_name": "african american", "target_name": "hip hop", "weight": 1.0, "year": 2006}, {"source": "10", "target": "79", "source_name": "african american", "target_name": "popular culture", "weight": 2.0, "year": 2006}, {"source": "10", "target": "80", "source_name": "african american", "target_name": "folk music", "weight": 1.0, "year": 2006}, {"source": "11", "target": "23", "source_name": "south africa", "target_name": "electronic dance music", "weight": 1.0, "year": 2006}, {"source": "11", "target": "36", "source_name": "south africa", "target_name": "music industry", "weight": 1.0, "year": 2006}, {"source": "11", "target": "53", "source_name": "south africa", "target_name": "popular music", "weight": 1.0, "year": 2006}, {"source": "11", "target": "74", "source_name": "south africa", "target_name": "united states", "weight": 2.0, "year": 2006}, {"source": "11", "target": "88", "source_name": "south africa", "target_name": "oxford university press", "weight": 1.0, "year": 2006}, {"source": "12", "target": "15", "source_name": "rock opera", "target_name": "musical theatre", "weight": 3.0, "year": 2006}, {"source": "12", "target": "33", "source_name": "rock opera", "target_name": "jesus christ", "weight": 1.0, "year": 2006}, {"source": "12", "target": "53", "source_name": "rock opera", "target_name": "popular music", "weight": 1.0, "year": 2006}, {"source": "12", "target": "77", "source_name": "rock opera", "target_name": "rock music", "weight": 1.0, "year": 2006}, {"source": "12", "target": "79", "source_name": "rock opera", "target_name": "popular culture", "weight": 1.0, "year": 2006}, {"source": "15", "target": "33", "source_name": "musical theatre", "target_name": "jesus christ", "weight": 1.0, "year": 2006}, {"source": "15", "target": "53", "source_name": "musical theatre", "target_name": "popular music", "weight": 1.0, "year": 2006}, {"source": "15", "target": "70", "source_name": "musical theatre", "target_name": "world war", "weight": 1.0, "year": 2006}, {"source": "15", "target": "74", "source_name": "musical theatre", "target_name": "united states", "weight": 1.0, "year": 2006}, {"source": "15", "target": "77", "source_name": "musical theatre", "target_name": "rock music", "weight": 1.0, "year": 2006}, {"source": "16", "target": "29", "source_name": "bob dylan", "target_name": "rolling stone", "weight": 1.0, "year": 2006}, {"source": "16", "target": "36", "source_name": "bob dylan", "target_name": "music industry", "weight": 1.0, "year": 2006}, {"source": "16", "target": "42", "source_name": "bob dylan", "target_name": "simon frith", "weight": 1.0, "year": 2006}, {"source": "16", "target": "48", "source_name": "bob dylan", "target_name": "pop music", "weight": 2.0, "year": 2006}, {"source": "16", "target": "53", "source_name": "bob dylan", "target_name": "popular music", "weight": 4.0, "year": 2006}, {"source": "16", "target": "69", "source_name": "bob dylan", "target_name": "classical music", "weight": 1.0, "year": 2006}, {"source": "16", "target": "72", "source_name": "bob dylan", "target_name": "jimi hendrix", "weight": 2.0, "year": 2006}, {"source": "16", "target": "77", "source_name": "bob dylan", "target_name": "rock music", "weight": 2.0, "year": 2006}, {"source": "16", "target": "80", "source_name": "bob dylan", "target_name": "folk music", "weight": 2.0, "year": 2006}, {"source": "17", "target": "30", "source_name": "civil rights", "target_name": "rock band", "weight": 1.0, "year": 2006}, {"source": "17", "target": "41", "source_name": "civil rights", "target_name": "youth culture", "weight": 1.0, "year": 2006}, {"source": "17", "target": "53", "source_name": "civil rights", "target_name": "popular music", "weight": 2.0, "year": 2006}, {"source": "17", "target": "73", "source_name": "civil rights", "target_name": "southern rock", "weight": 1.0, "year": 2006}, {"source": "17", "target": "74", "source_name": "civil rights", "target_name": "united states", "weight": 1.0, "year": 2006}, {"source": "17", "target": "75", "source_name": "civil rights", "target_name": "world war ii", "weight": 1.0, "year": 2006}, {"source": "17", "target": "77", "source_name": "civil rights", "target_name": "rock music", "weight": 1.0, "year": 2006}, {"source": "17", "target": "79", "source_name": "civil rights", "target_name": "popular culture", "weight": 1.0, "year": 2006}, {"source": "19", "target": "36", "source_name": "music video", "target_name": "music industry", "weight": 1.0, "year": 2006}, {"source": "19", "target": "47", "source_name": "music video", "target_name": "hard rock", "weight": 1.0, "year": 2006}, {"source": "19", "target": "48", "source_name": "music video", "target_name": "pop music", "weight": 3.0, "year": 2006}, {"source": "19", "target": "51", "source_name": "music video", "target_name": "cultural identity", "weight": 1.0, "year": 2006}, {"source": "19", "target": "53", "source_name": "music video", "target_name": "popular music", "weight": 2.0, "year": 2006}, {"source": "19", "target": "65", "source_name": "music video", "target_name": "country music", "weight": 2.0, "year": 2006}, {"source": "19", "target": "72", "source_name": "music video", "target_name": "jimi hendrix", "weight": 1.0, "year": 2006}, {"source": "19", "target": "74", "source_name": "music video", "target_name": "united states", "weight": 1.0, "year": 2006}, {"source": "19", "target": "77", "source_name": "music video", "target_name": "rock music", "weight": 6.0, "year": 2006}, {"source": "19", "target": "78", "source_name": "music video", "target_name": "hip hop", "weight": 1.0, "year": 2006}, {"source": "19", "target": "82", "source_name": "music video", "target_name": "heavy metal", "weight": 1.0, "year": 2006}, {"source": "20", "target": "29", "source_name": "garage rock", "target_name": "rolling stone", "weight": 1.0, "year": 2006}, {"source": "20", "target": "30", "source_name": "garage rock", "target_name": "rock band", "weight": 1.0, "year": 2006}, {"source": "20", "target": "43", "source_name": "garage rock", "target_name": "music education", "weight": 1.0, "year": 2006}, {"source": "20", "target": "44", "source_name": "garage rock", "target_name": "alternative rock", "weight": 1.0, "year": 2006}, {"source": "20", "target": "53", "source_name": "garage rock", "target_name": "popular music", "weight": 1.0, "year": 2006}, {"source": "20", "target": "57", "source_name": "garage rock", "target_name": "north america", "weight": 1.0, "year": 2006}, {"source": "20", "target": "65", "source_name": "garage rock", "target_name": "country music", "weight": 1.0, "year": 2006}, {"source": "20", "target": "73", "source_name": "garage rock", "target_name": "southern rock", "weight": 1.0, "year": 2006}, {"source": "20", "target": "80", "source_name": "garage rock", "target_name": "folk music", "weight": 1.0, "year": 2006}, {"source": "21", "target": "47", "source_name": "social protest", "target_name": "hard rock", "weight": 1.0, "year": 2006}, {"source": "21", "target": "48", "source_name": "social protest", "target_name": "pop music", "weight": 1.0, "year": 2006}, {"source": "21", "target": "53", "source_name": "social protest", "target_name": "popular music", "weight": 2.0, "year": 2006}, {"source": "21", "target": "57", "source_name": "social protest", "target_name": "north america", "weight": 2.0, "year": 2006}, {"source": "21", "target": "71", "source_name": "social protest", "target_name": "latin american", "weight": 1.0, "year": 2006}, {"source": "21", "target": "74", "source_name": "social protest", "target_name": "united states", "weight": 1.0, "year": 2006}, {"source": "21", "target": "77", "source_name": "social protest", "target_name": "rock music", "weight": 1.0, "year": 2006}, {"source": "21", "target": "82", "source_name": "social protest", "target_name": "heavy metal", "weight": 1.0, "year": 2006}, {"source": "22", "target": "35", "source_name": "chamber music", "target_name": "ancient greek", "weight": 1.0, "year": 2006}, {"source": "22", "target": "65", "source_name": "chamber music", "target_name": "country music", "weight": 1.0, "year": 2006}, {"source": "22", "target": "69", "source_name": "chamber music", "target_name": "classical music", "weight": 1.0, "year": 2006}, {"source": "22", "target": "77", "source_name": "chamber music", "target_name": "rock music", "weight": 1.0, "year": 2006}, {"source": "22", "target": "80", "source_name": "chamber music", "target_name": "folk music", "weight": 1.0, "year": 2006}, {"source": "22", "target": "89", "source_name": "chamber music", "target_name": "electronic music", "weight": 2.0, "year": 2006}, {"source": "23", "target": "42", "source_name": "electronic dance music", "target_name": "simon frith", "weight": 1.0, "year": 2006}, {"source": "23", "target": "53", "source_name": "electronic dance music", "target_name": "popular music", "weight": 3.0, "year": 2006}, {"source": "23", "target": "60", "source_name": "electronic dance music", "target_name": "cultural studies", "weight": 1.0, "year": 2006}, {"source": "23", "target": "76", "source_name": "electronic dance music", "target_name": "los angeles", "weight": 1.0, "year": 2006}, {"source": "23", "target": "79", "source_name": "electronic dance music", "target_name": "popular culture", "weight": 1.0, "year": 2006}, {"source": "24", "target": "36", "source_name": "punk rock", "target_name": "music industry", "weight": 1.0, "year": 2006}, {"source": "24", "target": "42", "source_name": "punk rock", "target_name": "simon frith", "weight": 1.0, "year": 2006}, {"source": "24", "target": "48", "source_name": "punk rock", "target_name": "pop music", "weight": 2.0, "year": 2006}, {"source": "24", "target": "53", "source_name": "punk rock", "target_name": "popular music", "weight": 3.0, "year": 2006}, {"source": "24", "target": "74", "source_name": "punk rock", "target_name": "united states", "weight": 1.0, "year": 2006}, {"source": "24", "target": "77", "source_name": "punk rock", "target_name": "rock music", "weight": 2.0, "year": 2006}, {"source": "24", "target": "78", "source_name": "punk rock", "target_name": "hip hop", "weight": 1.0, "year": 2006}, {"source": "24", "target": "80", "source_name": "punk rock", "target_name": "folk music", "weight": 1.0, "year": 2006}, {"source": "24", "target": "82", "source_name": "punk rock", "target_name": "heavy metal", "weight": 1.0, "year": 2006}, {"source": "25", "target": "53", "source_name": "russian rock", "target_name": "popular music", "weight": 1.0, "year": 2006}, {"source": "25", "target": "77", "source_name": "russian rock", "target_name": "rock music", "weight": 1.0, "year": 2006}, {"source": "28", "target": "37", "source_name": "high school", "target_name": "middle ages", "weight": 1.0, "year": 2006}, {"source": "28", "target": "77", "source_name": "high school", "target_name": "rock music", "weight": 2.0, "year": 2006}, {"source": "28", "target": "82", "source_name": "high school", "target_name": "heavy metal", "weight": 1.0, "year": 2006}, {"source": "29", "target": "36", "source_name": "rolling stone", "target_name": "music industry", "weight": 1.0, "year": 2006}, {"source": "29", "target": "42", "source_name": "rolling stone", "target_name": "simon frith", "weight": 1.0, "year": 2006}, {"source": "29", "target": "48", "source_name": "rolling stone", "target_name": "pop music", "weight": 2.0, "year": 2006}, {"source": "29", "target": "53", "source_name": "rolling stone", "target_name": "popular music", "weight": 2.0, "year": 2006}, {"source": "29", "target": "55", "source_name": "rolling stone", "target_name": "rock criticism", "weight": 2.0, "year": 2006}, {"source": "29", "target": "56", "source_name": "rolling stone", "target_name": "bruce springsteen", "weight": 1.0, "year": 2006}, {"source": "29", "target": "72", "source_name": "rolling stone", "target_name": "jimi hendrix", "weight": 1.0, "year": 2006}, {"source": "29", "target": "74", "source_name": "rolling stone", "target_name": "united states", "weight": 1.0, "year": 2006}, {"source": "29", "target": "77", "source_name": "rolling stone", "target_name": "rock music", "weight": 5.0, "year": 2006}, {"source": "30", "target": "36", "source_name": "rock band", "target_name": "music industry", "weight": 1.0, "year": 2006}, {"source": "30", "target": "43", "source_name": "rock band", "target_name": "music education", "weight": 1.0, "year": 2006}, {"source": "30", "target": "53", "source_name": "rock band", "target_name": "popular music", "weight": 6.0, "year": 2006}, {"source": "30", "target": "61", "source_name": "rock band", "target_name": "progressive rock", "weight": 3.0, "year": 2006}, {"source": "30", "target": "65", "source_name": "rock band", "target_name": "country music", "weight": 1.0, "year": 2006}, {"source": "30", "target": "69", "source_name": "rock band", "target_name": "classical music", "weight": 1.0, "year": 2006}, {"source": "30", "target": "72", "source_name": "rock band", "target_name": "jimi hendrix", "weight": 1.0, "year": 2006}, {"source": "30", "target": "73", "source_name": "rock band", "target_name": "southern rock", "weight": 2.0, "year": 2006}, {"source": "30", "target": "74", "source_name": "rock band", "target_name": "united states", "weight": 1.0, "year": 2006}, {"source": "30", "target": "77", "source_name": "rock band", "target_name": "rock music", "weight": 7.0, "year": 2006}, {"source": "30", "target": "80", "source_name": "rock band", "target_name": "folk music", "weight": 1.0, "year": 2006}, {"source": "30", "target": "82", "source_name": "rock band", "target_name": "heavy metal", "weight": 1.0, "year": 2006}, {"source": "33", "target": "53", "source_name": "jesus christ", "target_name": "popular music", "weight": 1.0, "year": 2006}, {"source": "33", "target": "70", "source_name": "jesus christ", "target_name": "world war", "weight": 1.0, "year": 2006}, {"source": "33", "target": "77", "source_name": "jesus christ", "target_name": "rock music", "weight": 1.0, "year": 2006}, {"source": "34", "target": "40", "source_name": "mass media", "target_name": "musical instruments", "weight": 1.0, "year": 2006}, {"source": "34", "target": "46", "source_name": "mass media", "target_name": "music festival", "weight": 1.0, "year": 2006}, {"source": "34", "target": "48", "source_name": "mass media", "target_name": "pop music", "weight": 1.0, "year": 2006}, {"source": "34", "target": "51", "source_name": "mass media", "target_name": "cultural identity", "weight": 1.0, "year": 2006}, {"source": "34", "target": "52", "source_name": "mass media", "target_name": "folk song", "weight": 2.0, "year": 2006}, {"source": "34", "target": "53", "source_name": "mass media", "target_name": "popular music", "weight": 4.0, "year": 2006}, {"source": "34", "target": "66", "source_name": "mass media", "target_name": "hong kong", "weight": 1.0, "year": 2006}, {"source": "34", "target": "69", "source_name": "mass media", "target_name": "classical music", "weight": 1.0, "year": 2006}, {"source": "34", "target": "77", "source_name": "mass media", "target_name": "rock music", "weight": 2.0, "year": 2006}, {"source": "35", "target": "43", "source_name": "ancient greek", "target_name": "music education", "weight": 1.0, "year": 2006}, {"source": "35", "target": "65", "source_name": "ancient greek", "target_name": "country music", "weight": 1.0, "year": 2006}, {"source": "35", "target": "77", "source_name": "ancient greek", "target_name": "rock music", "weight": 1.0, "year": 2006}, {"source": "35", "target": "80", "source_name": "ancient greek", "target_name": "folk music", "weight": 1.0, "year": 2006}, {"source": "35", "target": "89", "source_name": "ancient greek", "target_name": "electronic music", "weight": 1.0, "year": 2006}, {"source": "36", "target": "41", "source_name": "music industry", "target_name": "youth culture", "weight": 1.0, "year": 2006}, {"source": "36", "target": "42", "source_name": "music industry", "target_name": "simon frith", "weight": 1.0, "year": 2006}, {"source": "36", "target": "43", "source_name": "music industry", "target_name": "music education", "weight": 1.0, "year": 2006}, {"source": "36", "target": "48", "source_name": "music industry", "target_name": "pop music", "weight": 5.0, "year": 2006}, {"source": "36", "target": "51", "source_name": "music industry", "target_name": "cultural identity", "weight": 1.0, "year": 2006}, {"source": "36", "target": "53", "source_name": "music industry", "target_name": "popular music", "weight": 16.0, "year": 2006}, {"source": "36", "target": "61", "source_name": "music industry", "target_name": "progressive rock", "weight": 1.0, "year": 2006}, {"source": "36", "target": "65", "source_name": "music industry", "target_name": "country music", "weight": 1.0, "year": 2006}, {"source": "36", "target": "66", "source_name": "music industry", "target_name": "hong kong", "weight": 1.0, "year": 2006}, {"source": "36", "target": "67", "source_name": "music industry", "target_name": "rock art", "weight": 1.0, "year": 2006}, {"source": "36", "target": "68", "source_name": "music industry", "target_name": "hearing loss", "weight": 1.0, "year": 2006}, {"source": "36", "target": "69", "source_name": "music industry", "target_name": "classical music", "weight": 2.0, "year": 2006}, {"source": "36", "target": "72", "source_name": "music industry", "target_name": "jimi hendrix", "weight": 3.0, "year": 2006}, {"source": "36", "target": "74", "source_name": "music industry", "target_name": "united states", "weight": 2.0, "year": 2006}, {"source": "36", "target": "76", "source_name": "music industry", "target_name": "los angeles", "weight": 2.0, "year": 2006}, {"source": "36", "target": "77", "source_name": "music industry", "target_name": "rock music", "weight": 9.0, "year": 2006}, {"source": "36", "target": "78", "source_name": "music industry", "target_name": "hip hop", "weight": 3.0, "year": 2006}, {"source": "36", "target": "79", "source_name": "music industry", "target_name": "popular culture", "weight": 4.0, "year": 2006}, {"source": "36", "target": "80", "source_name": "music industry", "target_name": "folk music", "weight": 2.0, "year": 2006}, {"source": "36", "target": "83", "source_name": "music industry", "target_name": "folk rock", "weight": 1.0, "year": 2006}, {"source": "37", "target": "58", "source_name": "middle ages", "target_name": "music therapy", "weight": 1.0, "year": 2006}, {"source": "37", "target": "69", "source_name": "middle ages", "target_name": "classical music", "weight": 1.0, "year": 2006}, {"source": "37", "target": "77", "source_name": "middle ages", "target_name": "rock music", "weight": 1.0, "year": 2006}, {"source": "37", "target": "80", "source_name": "middle ages", "target_name": "folk music", "weight": 2.0, "year": 2006}, {"source": "40", "target": "43", "source_name": "musical instruments", "target_name": "music education", "weight": 1.0, "year": 2006}, {"source": "40", "target": "49", "source_name": "musical instruments", "target_name": "music theory", "weight": 1.0, "year": 2006}, {"source": "40", "target": "53", "source_name": "musical instruments", "target_name": "popular music", "weight": 1.0, "year": 2006}, {"source": "40", "target": "54", "source_name": "musical instruments", "target_name": "american popular music", "weight": 1.0, "year": 2006}, {"source": "40", "target": "70", "source_name": "musical instruments", "target_name": "world war", "weight": 1.0, "year": 2006}, {"source": "40", "target": "74", "source_name": "musical instruments", "target_name": "united states", "weight": 1.0, "year": 2006}, {"source": "40", "target": "75", "source_name": "musical instruments", "target_name": "world war ii", "weight": 1.0, "year": 2006}, {"source": "40", "target": "89", "source_name": "musical instruments", "target_name": "electronic music", "weight": 1.0, "year": 2006}, {"source": "41", "target": "48", "source_name": "youth culture", "target_name": "pop music", "weight": 3.0, "year": 2006}, {"source": "41", "target": "51", "source_name": "youth culture", "target_name": "cultural identity", "weight": 2.0, "year": 2006}, {"source": "41", "target": "53", "source_name": "youth culture", "target_name": "popular music", "weight": 2.0, "year": 2006}, {"source": "41", "target": "60", "source_name": "youth culture", "target_name": "cultural studies", "weight": 2.0, "year": 2006}, {"source": "41", "target": "66", "source_name": "youth culture", "target_name": "hong kong", "weight": 1.0, "year": 2006}, {"source": "41", "target": "74", "source_name": "youth culture", "target_name": "united states", "weight": 1.0, "year": 2006}, {"source": "41", "target": "75", "source_name": "youth culture", "target_name": "world war ii", "weight": 1.0, "year": 2006}, {"source": "41", "target": "77", "source_name": "youth culture", "target_name": "rock music", "weight": 3.0, "year": 2006}, {"source": "42", "target": "48", "source_name": "simon frith", "target_name": "pop music", "weight": 6.0, "year": 2006}, {"source": "42", "target": "51", "source_name": "simon frith", "target_name": "cultural identity", "weight": 1.0, "year": 2006}, {"source": "42", "target": "53", "source_name": "simon frith", "target_name": "popular music", "weight": 4.0, "year": 2006}, {"source": "42", "target": "55", "source_name": "simon frith", "target_name": "rock criticism", "weight": 2.0, "year": 2006}, {"source": "42", "target": "57", "source_name": "simon frith", "target_name": "north america", "weight": 1.0, "year": 2006}, {"source": "42", "target": "60", "source_name": "simon frith", "target_name": "cultural studies", "weight": 1.0, "year": 2006}, {"source": "42", "target": "65", "source_name": "simon frith", "target_name": "country music", "weight": 1.0, "year": 2006}, {"source": "42", "target": "72", "source_name": "simon frith", "target_name": "jimi hendrix", "weight": 1.0, "year": 2006}, {"source": "42", "target": "76", "source_name": "simon frith", "target_name": "los angeles", "weight": 1.0, "year": 2006}, {"source": "42", "target": "77", "source_name": "simon frith", "target_name": "rock music", "weight": 2.0, "year": 2006}, {"source": "42", "target": "79", "source_name": "simon frith", "target_name": "popular culture", "weight": 1.0, "year": 2006}, {"source": "43", "target": "49", "source_name": "music education", "target_name": "music theory", "weight": 2.0, "year": 2006}, {"source": "43", "target": "53", "source_name": "music education", "target_name": "popular music", "weight": 4.0, "year": 2006}, {"source": "43", "target": "60", "source_name": "music education", "target_name": "cultural studies", "weight": 1.0, "year": 2006}, {"source": "43", "target": "77", "source_name": "music education", "target_name": "rock music", "weight": 1.0, "year": 2006}, {"source": "43", "target": "80", "source_name": "music education", "target_name": "folk music", "weight": 3.0, "year": 2006}, {"source": "44", "target": "53", "source_name": "alternative rock", "target_name": "popular music", "weight": 5.0, "year": 2006}, {"source": "44", "target": "57", "source_name": "alternative rock", "target_name": "north america", "weight": 3.0, "year": 2006}, {"source": "44", "target": "65", "source_name": "alternative rock", "target_name": "country music", "weight": 2.0, "year": 2006}, {"source": "44", "target": "67", "source_name": "alternative rock", "target_name": "rock art", "weight": 1.0, "year": 2006}, {"source": "44", "target": "73", "source_name": "alternative rock", "target_name": "southern rock", "weight": 1.0, "year": 2006}, {"source": "44", "target": "74", "source_name": "alternative rock", "target_name": "united states", "weight": 2.0, "year": 2006}, {"source": "44", "target": "77", "source_name": "alternative rock", "target_name": "rock music", "weight": 3.0, "year": 2006}, {"source": "44", "target": "78", "source_name": "alternative rock", "target_name": "hip hop", "weight": 1.0, "year": 2006}, {"source": "44", "target": "80", "source_name": "alternative rock", "target_name": "folk music", "weight": 1.0, "year": 2006}, {"source": "47", "target": "48", "source_name": "hard rock", "target_name": "pop music", "weight": 1.0, "year": 2006}, {"source": "47", "target": "57", "source_name": "hard rock", "target_name": "north america", "weight": 1.0, "year": 2006}, {"source": "47", "target": "77", "source_name": "hard rock", "target_name": "rock music", "weight": 3.0, "year": 2006}, {"source": "47", "target": "79", "source_name": "hard rock", "target_name": "popular culture", "weight": 1.0, "year": 2006}, {"source": "48", "target": "51", "source_name": "pop music", "target_name": "cultural identity", "weight": 3.0, "year": 2006}, {"source": "48", "target": "52", "source_name": "pop music", "target_name": "folk song", "weight": 1.0, "year": 2006}, {"source": "48", "target": "53", "source_name": "pop music", "target_name": "popular music", "weight": 13.0, "year": 2006}, {"source": "48", "target": "55", "source_name": "pop music", "target_name": "rock criticism", "weight": 2.0, "year": 2006}, {"source": "48", "target": "57", "source_name": "pop music", "target_name": "north america", "weight": 2.0, "year": 2006}, {"source": "48", "target": "60", "source_name": "pop music", "target_name": "cultural studies", "weight": 1.0, "year": 2006}, {"source": "48", "target": "64", "source_name": "pop music", "target_name": "english language", "weight": 1.0, "year": 2006}, {"source": "48", "target": "65", "source_name": "pop music", "target_name": "country music", "weight": 1.0, "year": 2006}, {"source": "48", "target": "66", "source_name": "pop music", "target_name": "hong kong", "weight": 2.0, "year": 2006}, {"source": "48", "target": "67", "source_name": "pop music", "target_name": "rock art", "weight": 1.0, "year": 2006}, {"source": "48", "target": "70", "source_name": "pop music", "target_name": "world war", "weight": 2.0, "year": 2006}, {"source": "48", "target": "71", "source_name": "pop music", "target_name": "latin american", "weight": 1.0, "year": 2006}, {"source": "48", "target": "72", "source_name": "pop music", "target_name": "jimi hendrix", "weight": 2.0, "year": 2006}, {"source": "48", "target": "74", "source_name": "pop music", "target_name": "united states", "weight": 4.0, "year": 2006}, {"source": "48", "target": "77", "source_name": "pop music", "target_name": "rock music", "weight": 13.0, "year": 2006}, {"source": "48", "target": "78", "source_name": "pop music", "target_name": "hip hop", "weight": 1.0, "year": 2006}, {"source": "48", "target": "79", "source_name": "pop music", "target_name": "popular culture", "weight": 2.0, "year": 2006}, {"source": "48", "target": "82", "source_name": "pop music", "target_name": "heavy metal", "weight": 1.0, "year": 2006}, {"source": "48", "target": "83", "source_name": "pop music", "target_name": "folk rock", "weight": 1.0, "year": 2006}, {"source": "49", "target": "53", "source_name": "music theory", "target_name": "popular music", "weight": 2.0, "year": 2006}, {"source": "49", "target": "57", "source_name": "music theory", "target_name": "north america", "weight": 2.0, "year": 2006}, {"source": "49", "target": "72", "source_name": "music theory", "target_name": "jimi hendrix", "weight": 1.0, "year": 2006}, {"source": "49", "target": "77", "source_name": "music theory", "target_name": "rock music", "weight": 2.0, "year": 2006}, {"source": "49", "target": "89", "source_name": "music theory", "target_name": "electronic music", "weight": 1.0, "year": 2006}, {"source": "50", "target": "53", "source_name": "hollywood film", "target_name": "popular music", "weight": 1.0, "year": 2006}, {"source": "50", "target": "79", "source_name": "hollywood film", "target_name": "popular culture", "weight": 1.0, "year": 2006}, {"source": "51", "target": "52", "source_name": "cultural identity", "target_name": "folk song", "weight": 1.0, "year": 2006}, {"source": "51", "target": "53", "source_name": "cultural identity", "target_name": "popular music", "weight": 2.0, "year": 2006}, {"source": "51", "target": "60", "source_name": "cultural identity", "target_name": "cultural studies", "weight": 2.0, "year": 2006}, {"source": "51", "target": "66", "source_name": "cultural identity", "target_name": "hong kong", "weight": 1.0, "year": 2006}, {"source": "51", "target": "72", "source_name": "cultural identity", "target_name": "jimi hendrix", "weight": 1.0, "year": 2006}, {"source": "51", "target": "74", "source_name": "cultural identity", "target_name": "united states", "weight": 2.0, "year": 2006}, {"source": "51", "target": "77", "source_name": "cultural identity", "target_name": "rock music", "weight": 6.0, "year": 2006}, {"source": "51", "target": "79", "source_name": "cultural identity", "target_name": "popular culture", "weight": 1.0, "year": 2006}, {"source": "52", "target": "53", "source_name": "folk song", "target_name": "popular music", "weight": 3.0, "year": 2006}, {"source": "52", "target": "66", "source_name": "folk song", "target_name": "hong kong", "weight": 1.0, "year": 2006}, {"source": "52", "target": "69", "source_name": "folk song", "target_name": "classical music", "weight": 1.0, "year": 2006}, {"source": "52", "target": "77", "source_name": "folk song", "target_name": "rock music", "weight": 1.0, "year": 2006}, {"source": "52", "target": "80", "source_name": "folk song", "target_name": "folk music", "weight": 1.0, "year": 2006}, {"source": "53", "target": "54", "source_name": "popular music", "target_name": "american popular music", "weight": 5.0, "year": 2006}, {"source": "53", "target": "55", "source_name": "popular music", "target_name": "rock criticism", "weight": 2.0, "year": 2006}, {"source": "53", "target": "56", "source_name": "popular music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2006}, {"source": "53", "target": "57", "source_name": "popular music", "target_name": "north america", "weight": 5.0, "year": 2006}, {"source": "53", "target": "58", "source_name": "popular music", "target_name": "music therapy", "weight": 1.0, "year": 2006}, {"source": "53", "target": "59", "source_name": "popular music", "target_name": "college students", "weight": 1.0, "year": 2006}, {"source": "53", "target": "60", "source_name": "popular music", "target_name": "cultural studies", "weight": 5.0, "year": 2006}, {"source": "53", "target": "61", "source_name": "popular music", "target_name": "progressive rock", "weight": 3.0, "year": 2006}, {"source": "53", "target": "62", "source_name": "popular music", "target_name": "led zeppelin", "weight": 1.0, "year": 2006}, {"source": "53", "target": "65", "source_name": "popular music", "target_name": "country music", "weight": 6.0, "year": 2006}, {"source": "53", "target": "66", "source_name": "popular music", "target_name": "hong kong", "weight": 2.0, "year": 2006}, {"source": "53", "target": "67", "source_name": "popular music", "target_name": "rock art", "weight": 2.0, "year": 2006}, {"source": "53", "target": "69", "source_name": "popular music", "target_name": "classical music", "weight": 6.0, "year": 2006}, {"source": "53", "target": "70", "source_name": "popular music", "target_name": "world war", "weight": 3.0, "year": 2006}, {"source": "53", "target": "71", "source_name": "popular music", "target_name": "latin american", "weight": 2.0, "year": 2006}, {"source": "53", "target": "72", "source_name": "popular music", "target_name": "jimi hendrix", "weight": 4.0, "year": 2006}, {"source": "53", "target": "73", "source_name": "popular music", "target_name": "southern rock", "weight": 2.0, "year": 2006}, {"source": "53", "target": "74", "source_name": "popular music", "target_name": "united states", "weight": 11.0, "year": 2006}, {"source": "53", "target": "75", "source_name": "popular music", "target_name": "world war ii", "weight": 2.0, "year": 2006}, {"source": "53", "target": "76", "source_name": "popular music", "target_name": "los angeles", "weight": 5.0, "year": 2006}, {"source": "53", "target": "77", "source_name": "popular music", "target_name": "rock music", "weight": 41.0, "year": 2006}, {"source": "53", "target": "78", "source_name": "popular music", "target_name": "hip hop", "weight": 5.0, "year": 2006}, {"source": "53", "target": "79", "source_name": "popular music", "target_name": "popular culture", "weight": 12.0, "year": 2006}, {"source": "53", "target": "80", "source_name": "popular music", "target_name": "folk music", "weight": 8.0, "year": 2006}, {"source": "53", "target": "82", "source_name": "popular music", "target_name": "heavy metal", "weight": 5.0, "year": 2006}, {"source": "53", "target": "83", "source_name": "popular music", "target_name": "folk rock", "weight": 1.0, "year": 2006}, {"source": "53", "target": "85", "source_name": "popular music", "target_name": "jewish music", "weight": 1.0, "year": 2006}, {"source": "53", "target": "87", "source_name": "popular music", "target_name": "music hall", "weight": 1.0, "year": 2006}, {"source": "53", "target": "88", "source_name": "popular music", "target_name": "oxford university press", "weight": 2.0, "year": 2006}, {"source": "53", "target": "89", "source_name": "popular music", "target_name": "electronic music", "weight": 1.0, "year": 2006}, {"source": "54", "target": "65", "source_name": "american popular music", "target_name": "country music", "weight": 2.0, "year": 2006}, {"source": "54", "target": "69", "source_name": "american popular music", "target_name": "classical music", "weight": 1.0, "year": 2006}, {"source": "54", "target": "71", "source_name": "american popular music", "target_name": "latin american", "weight": 1.0, "year": 2006}, {"source": "54", "target": "74", "source_name": "american popular music", "target_name": "united states", "weight": 2.0, "year": 2006}, {"source": "54", "target": "76", "source_name": "american popular music", "target_name": "los angeles", "weight": 1.0, "year": 2006}, {"source": "54", "target": "79", "source_name": "american popular music", "target_name": "popular culture", "weight": 1.0, "year": 2006}, {"source": "55", "target": "57", "source_name": "rock criticism", "target_name": "north america", "weight": 1.0, "year": 2006}, {"source": "55", "target": "61", "source_name": "rock criticism", "target_name": "progressive rock", "weight": 1.0, "year": 2006}, {"source": "55", "target": "65", "source_name": "rock criticism", "target_name": "country music", "weight": 1.0, "year": 2006}, {"source": "55", "target": "74", "source_name": "rock criticism", "target_name": "united states", "weight": 1.0, "year": 2006}, {"source": "55", "target": "77", "source_name": "rock criticism", "target_name": "rock music", "weight": 2.0, "year": 2006}, {"source": "56", "target": "72", "source_name": "bruce springsteen", "target_name": "jimi hendrix", "weight": 1.0, "year": 2006}, {"source": "56", "target": "77", "source_name": "bruce springsteen", "target_name": "rock music", "weight": 2.0, "year": 2006}, {"source": "56", "target": "79", "source_name": "bruce springsteen", "target_name": "popular culture", "weight": 1.0, "year": 2006}, {"source": "57", "target": "65", "source_name": "north america", "target_name": "country music", "weight": 2.0, "year": 2006}, {"source": "57", "target": "71", "source_name": "north america", "target_name": "latin american", "weight": 1.0, "year": 2006}, {"source": "57", "target": "73", "source_name": "north america", "target_name": "southern rock", "weight": 1.0, "year": 2006}, {"source": "57", "target": "74", "source_name": "north america", "target_name": "united states", "weight": 3.0, "year": 2006}, {"source": "57", "target": "77", "source_name": "north america", "target_name": "rock music", "weight": 2.0, "year": 2006}, {"source": "57", "target": "78", "source_name": "north america", "target_name": "hip hop", "weight": 1.0, "year": 2006}, {"source": "57", "target": "80", "source_name": "north america", "target_name": "folk music", "weight": 2.0, "year": 2006}, {"source": "58", "target": "64", "source_name": "music therapy", "target_name": "english language", "weight": 1.0, "year": 2006}, {"source": "58", "target": "77", "source_name": "music therapy", "target_name": "rock music", "weight": 3.0, "year": 2006}, {"source": "59", "target": "74", "source_name": "college students", "target_name": "united states", "weight": 1.0, "year": 2006}, {"source": "60", "target": "62", "source_name": "cultural studies", "target_name": "led zeppelin", "weight": 1.0, "year": 2006}, {"source": "60", "target": "71", "source_name": "cultural studies", "target_name": "latin american", "weight": 1.0, "year": 2006}, {"source": "60", "target": "76", "source_name": "cultural studies", "target_name": "los angeles", "weight": 1.0, "year": 2006}, {"source": "60", "target": "77", "source_name": "cultural studies", "target_name": "rock music", "weight": 5.0, "year": 2006}, {"source": "60", "target": "79", "source_name": "cultural studies", "target_name": "popular culture", "weight": 4.0, "year": 2006}, {"source": "60", "target": "80", "source_name": "cultural studies", "target_name": "folk music", "weight": 1.0, "year": 2006}, {"source": "60", "target": "85", "source_name": "cultural studies", "target_name": "jewish music", "weight": 1.0, "year": 2006}, {"source": "60", "target": "87", "source_name": "cultural studies", "target_name": "music hall", "weight": 1.0, "year": 2006}, {"source": "60", "target": "88", "source_name": "cultural studies", "target_name": "oxford university press", "weight": 2.0, "year": 2006}, {"source": "61", "target": "69", "source_name": "progressive rock", "target_name": "classical music", "weight": 2.0, "year": 2006}, {"source": "61", "target": "72", "source_name": "progressive rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2006}, {"source": "61", "target": "74", "source_name": "progressive rock", "target_name": "united states", "weight": 1.0, "year": 2006}, {"source": "61", "target": "77", "source_name": "progressive rock", "target_name": "rock music", "weight": 7.0, "year": 2006}, {"source": "61", "target": "82", "source_name": "progressive rock", "target_name": "heavy metal", "weight": 1.0, "year": 2006}, {"source": "61", "target": "89", "source_name": "progressive rock", "target_name": "electronic music", "weight": 1.0, "year": 2006}, {"source": "62", "target": "77", "source_name": "led zeppelin", "target_name": "rock music", "weight": 1.0, "year": 2006}, {"source": "62", "target": "88", "source_name": "led zeppelin", "target_name": "oxford university press", "weight": 1.0, "year": 2006}, {"source": "64", "target": "70", "source_name": "english language", "target_name": "world war", "weight": 1.0, "year": 2006}, {"source": "64", "target": "74", "source_name": "english language", "target_name": "united states", "weight": 1.0, "year": 2006}, {"source": "64", "target": "77", "source_name": "english language", "target_name": "rock music", "weight": 2.0, "year": 2006}, {"source": "64", "target": "79", "source_name": "english language", "target_name": "popular culture", "weight": 1.0, "year": 2006}, {"source": "65", "target": "73", "source_name": "country music", "target_name": "southern rock", "weight": 2.0, "year": 2006}, {"source": "65", "target": "74", "source_name": "country music", "target_name": "united states", "weight": 1.0, "year": 2006}, {"source": "65", "target": "77", "source_name": "country music", "target_name": "rock music", "weight": 3.0, "year": 2006}, {"source": "65", "target": "80", "source_name": "country music", "target_name": "folk music", "weight": 2.0, "year": 2006}, {"source": "65", "target": "89", "source_name": "country music", "target_name": "electronic music", "weight": 1.0, "year": 2006}, {"source": "66", "target": "77", "source_name": "hong kong", "target_name": "rock music", "weight": 2.0, "year": 2006}, {"source": "67", "target": "77", "source_name": "rock art", "target_name": "rock music", "weight": 2.0, "year": 2006}, {"source": "68", "target": "77", "source_name": "hearing loss", "target_name": "rock music", "weight": 2.0, "year": 2006}, {"source": "69", "target": "71", "source_name": "classical music", "target_name": "latin american", "weight": 1.0, "year": 2006}, {"source": "69", "target": "72", "source_name": "classical music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2006}, {"source": "69", "target": "74", "source_name": "classical music", "target_name": "united states", "weight": 3.0, "year": 2006}, {"source": "69", "target": "76", "source_name": "classical music", "target_name": "los angeles", "weight": 1.0, "year": 2006}, {"source": "69", "target": "77", "source_name": "classical music", "target_name": "rock music", "weight": 13.0, "year": 2006}, {"source": "69", "target": "78", "source_name": "classical music", "target_name": "hip hop", "weight": 1.0, "year": 2006}, {"source": "69", "target": "79", "source_name": "classical music", "target_name": "popular culture", "weight": 1.0, "year": 2006}, {"source": "69", "target": "80", "source_name": "classical music", "target_name": "folk music", "weight": 1.0, "year": 2006}, {"source": "69", "target": "82", "source_name": "classical music", "target_name": "heavy metal", "weight": 2.0, "year": 2006}, {"source": "69", "target": "89", "source_name": "classical music", "target_name": "electronic music", "weight": 1.0, "year": 2006}, {"source": "70", "target": "74", "source_name": "world war", "target_name": "united states", "weight": 2.0, "year": 2006}, {"source": "70", "target": "75", "source_name": "world war", "target_name": "world war ii", "weight": 2.0, "year": 2006}, {"source": "70", "target": "77", "source_name": "world war", "target_name": "rock music", "weight": 3.0, "year": 2006}, {"source": "70", "target": "79", "source_name": "world war", "target_name": "popular culture", "weight": 1.0, "year": 2006}, {"source": "70", "target": "80", "source_name": "world war", "target_name": "folk music", "weight": 1.0, "year": 2006}, {"source": "70", "target": "87", "source_name": "world war", "target_name": "music hall", "weight": 1.0, "year": 2006}, {"source": "70", "target": "89", "source_name": "world war", "target_name": "electronic music", "weight": 1.0, "year": 2006}, {"source": "71", "target": "74", "source_name": "latin american", "target_name": "united states", "weight": 3.0, "year": 2006}, {"source": "71", "target": "76", "source_name": "latin american", "target_name": "los angeles", "weight": 2.0, "year": 2006}, {"source": "71", "target": "77", "source_name": "latin american", "target_name": "rock music", "weight": 4.0, "year": 2006}, {"source": "71", "target": "79", "source_name": "latin american", "target_name": "popular culture", "weight": 1.0, "year": 2006}, {"source": "72", "target": "74", "source_name": "jimi hendrix", "target_name": "united states", "weight": 1.0, "year": 2006}, {"source": "72", "target": "77", "source_name": "jimi hendrix", "target_name": "rock music", "weight": 5.0, "year": 2006}, {"source": "72", "target": "79", "source_name": "jimi hendrix", "target_name": "popular culture", "weight": 1.0, "year": 2006}, {"source": "72", "target": "80", "source_name": "jimi hendrix", "target_name": "folk music", "weight": 1.0, "year": 2006}, {"source": "72", "target": "89", "source_name": "jimi hendrix", "target_name": "electronic music", "weight": 1.0, "year": 2006}, {"source": "73", "target": "77", "source_name": "southern rock", "target_name": "rock music", "weight": 1.0, "year": 2006}, {"source": "73", "target": "80", "source_name": "southern rock", "target_name": "folk music", "weight": 1.0, "year": 2006}, {"source": "74", "target": "76", "source_name": "united states", "target_name": "los angeles", "weight": 1.0, "year": 2006}, {"source": "74", "target": "77", "source_name": "united states", "target_name": "rock music", "weight": 9.0, "year": 2006}, {"source": "74", "target": "78", "source_name": "united states", "target_name": "hip hop", "weight": 1.0, "year": 2006}, {"source": "74", "target": "79", "source_name": "united states", "target_name": "popular culture", "weight": 3.0, "year": 2006}, {"source": "74", "target": "80", "source_name": "united states", "target_name": "folk music", "weight": 2.0, "year": 2006}, {"source": "76", "target": "77", "source_name": "los angeles", "target_name": "rock music", "weight": 4.0, "year": 2006}, {"source": "76", "target": "79", "source_name": "los angeles", "target_name": "popular culture", "weight": 1.0, "year": 2006}, {"source": "77", "target": "78", "source_name": "rock music", "target_name": "hip hop", "weight": 2.0, "year": 2006}, {"source": "77", "target": "79", "source_name": "rock music", "target_name": "popular culture", "weight": 8.0, "year": 2006}, {"source": "77", "target": "80", "source_name": "rock music", "target_name": "folk music", "weight": 3.0, "year": 2006}, {"source": "77", "target": "82", "source_name": "rock music", "target_name": "heavy metal", "weight": 6.0, "year": 2006}, {"source": "77", "target": "88", "source_name": "rock music", "target_name": "oxford university press", "weight": 1.0, "year": 2006}, {"source": "77", "target": "89", "source_name": "rock music", "target_name": "electronic music", "weight": 3.0, "year": 2006}, {"source": "78", "target": "79", "source_name": "hip hop", "target_name": "popular culture", "weight": 2.0, "year": 2006}, {"source": "78", "target": "80", "source_name": "hip hop", "target_name": "folk music", "weight": 1.0, "year": 2006}, {"source": "78", "target": "82", "source_name": "hip hop", "target_name": "heavy metal", "weight": 1.0, "year": 2006}, {"source": "79", "target": "80", "source_name": "popular culture", "target_name": "folk music", "weight": 2.0, "year": 2006}, {"source": "79", "target": "82", "source_name": "popular culture", "target_name": "heavy metal", "weight": 1.0, "year": 2006}, {"source": "79", "target": "85", "source_name": "popular culture", "target_name": "jewish music", "weight": 1.0, "year": 2006}, {"source": "79", "target": "87", "source_name": "popular culture", "target_name": "music hall", "weight": 2.0, "year": 2006}, {"source": "79", "target": "88", "source_name": "popular culture", "target_name": "oxford university press", "weight": 1.0, "year": 2006}, {"source": "80", "target": "85", "source_name": "folk music", "target_name": "jewish music", "weight": 1.0, "year": 2006}, {"source": "80", "target": "87", "source_name": "folk music", "target_name": "music hall", "weight": 1.0, "year": 2006}, {"source": "80", "target": "88", "source_name": "folk music", "target_name": "oxford university press", "weight": 1.0, "year": 2006}, {"source": "80", "target": "89", "source_name": "folk music", "target_name": "electronic music", "weight": 1.0, "year": 2006}, {"source": "85", "target": "88", "source_name": "jewish music", "target_name": "oxford university press", "weight": 1.0, "year": 2006}]}, {"2007": [{"source": "1", "target": "9", "source_name": "rock star", "target_name": "compact disc", "weight": 1.0, "year": 2007}, {"source": "1", "target": "28", "source_name": "rock star", "target_name": "high school", "weight": 1.0, "year": 2007}, {"source": "1", "target": "29", "source_name": "rock star", "target_name": "rolling stone", "weight": 1.0, "year": 2007}, {"source": "1", "target": "36", "source_name": "rock star", "target_name": "music industry", "weight": 2.0, "year": 2007}, {"source": "1", "target": "41", "source_name": "rock star", "target_name": "youth culture", "weight": 1.0, "year": 2007}, {"source": "1", "target": "48", "source_name": "rock star", "target_name": "pop music", "weight": 3.0, "year": 2007}, {"source": "1", "target": "51", "source_name": "rock star", "target_name": "cultural identity", "weight": 1.0, "year": 2007}, {"source": "1", "target": "53", "source_name": "rock star", "target_name": "popular music", "weight": 2.0, "year": 2007}, {"source": "1", "target": "69", "source_name": "rock star", "target_name": "classical music", "weight": 1.0, "year": 2007}, {"source": "1", "target": "74", "source_name": "rock star", "target_name": "united states", "weight": 1.0, "year": 2007}, {"source": "1", "target": "77", "source_name": "rock star", "target_name": "rock music", "weight": 6.0, "year": 2007}, {"source": "1", "target": "82", "source_name": "rock star", "target_name": "heavy metal", "weight": 2.0, "year": 2007}, {"source": "2", "target": "19", "source_name": "indie rock", "target_name": "music video", "weight": 1.0, "year": 2007}, {"source": "2", "target": "36", "source_name": "indie rock", "target_name": "music industry", "weight": 1.0, "year": 2007}, {"source": "2", "target": "48", "source_name": "indie rock", "target_name": "pop music", "weight": 1.0, "year": 2007}, {"source": "2", "target": "51", "source_name": "indie rock", "target_name": "cultural identity", "weight": 1.0, "year": 2007}, {"source": "2", "target": "72", "source_name": "indie rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2007}, {"source": "2", "target": "74", "source_name": "indie rock", "target_name": "united states", "weight": 1.0, "year": 2007}, {"source": "2", "target": "77", "source_name": "indie rock", "target_name": "rock music", "weight": 2.0, "year": 2007}, {"source": "3", "target": "79", "source_name": "glam rock", "target_name": "popular culture", "weight": 1.0, "year": 2007}, {"source": "4", "target": "7", "source_name": "gregorian chant", "target_name": "nineteenth century", "weight": 1.0, "year": 2007}, {"source": "4", "target": "9", "source_name": "gregorian chant", "target_name": "compact disc", "weight": 1.0, "year": 2007}, {"source": "4", "target": "10", "source_name": "gregorian chant", "target_name": "african american", "weight": 1.0, "year": 2007}, {"source": "4", "target": "19", "source_name": "gregorian chant", "target_name": "music video", "weight": 1.0, "year": 2007}, {"source": "4", "target": "22", "source_name": "gregorian chant", "target_name": "chamber music", "weight": 1.0, "year": 2007}, {"source": "4", "target": "36", "source_name": "gregorian chant", "target_name": "music industry", "weight": 1.0, "year": 2007}, {"source": "4", "target": "37", "source_name": "gregorian chant", "target_name": "middle ages", "weight": 1.0, "year": 2007}, {"source": "4", "target": "38", "source_name": "gregorian chant", "target_name": "summary additional listening", "weight": 1.0, "year": 2007}, {"source": "4", "target": "40", "source_name": "gregorian chant", "target_name": "musical instruments", "weight": 1.0, "year": 2007}, {"source": "4", "target": "48", "source_name": "gregorian chant", "target_name": "pop music", "weight": 1.0, "year": 2007}, {"source": "4", "target": "52", "source_name": "gregorian chant", "target_name": "folk song", "weight": 1.0, "year": 2007}, {"source": "4", "target": "53", "source_name": "gregorian chant", "target_name": "popular music", "weight": 1.0, "year": 2007}, {"source": "4", "target": "54", "source_name": "gregorian chant", "target_name": "american popular music", "weight": 1.0, "year": 2007}, {"source": "4", "target": "65", "source_name": "gregorian chant", "target_name": "country music", "weight": 1.0, "year": 2007}, {"source": "4", "target": "69", "source_name": "gregorian chant", "target_name": "classical music", "weight": 1.0, "year": 2007}, {"source": "4", "target": "74", "source_name": "gregorian chant", "target_name": "united states", "weight": 1.0, "year": 2007}, {"source": "4", "target": "80", "source_name": "gregorian chant", "target_name": "folk music", "weight": 1.0, "year": 2007}, {"source": "4", "target": "89", "source_name": "gregorian chant", "target_name": "electronic music", "weight": 1.0, "year": 2007}, {"source": "5", "target": "12", "source_name": "jesus christ superstar", "target_name": "rock opera", "weight": 1.0, "year": 2007}, {"source": "5", "target": "15", "source_name": "jesus christ superstar", "target_name": "musical theatre", "weight": 2.0, "year": 2007}, {"source": "5", "target": "33", "source_name": "jesus christ superstar", "target_name": "jesus christ", "weight": 2.0, "year": 2007}, {"source": "5", "target": "34", "source_name": "jesus christ superstar", "target_name": "mass media", "weight": 1.0, "year": 2007}, {"source": "5", "target": "53", "source_name": "jesus christ superstar", "target_name": "popular music", "weight": 1.0, "year": 2007}, {"source": "5", "target": "77", "source_name": "jesus christ superstar", "target_name": "rock music", "weight": 3.0, "year": 2007}, {"source": "6", "target": "10", "source_name": "elvis presley", "target_name": "african american", "weight": 1.0, "year": 2007}, {"source": "6", "target": "16", "source_name": "elvis presley", "target_name": "bob dylan", "weight": 1.0, "year": 2007}, {"source": "6", "target": "17", "source_name": "elvis presley", "target_name": "civil rights", "weight": 1.0, "year": 2007}, {"source": "6", "target": "23", "source_name": "elvis presley", "target_name": "electronic dance music", "weight": 1.0, "year": 2007}, {"source": "6", "target": "29", "source_name": "elvis presley", "target_name": "rolling stone", "weight": 1.0, "year": 2007}, {"source": "6", "target": "36", "source_name": "elvis presley", "target_name": "music industry", "weight": 2.0, "year": 2007}, {"source": "6", "target": "40", "source_name": "elvis presley", "target_name": "musical instruments", "weight": 1.0, "year": 2007}, {"source": "6", "target": "41", "source_name": "elvis presley", "target_name": "youth culture", "weight": 1.0, "year": 2007}, {"source": "6", "target": "42", "source_name": "elvis presley", "target_name": "simon frith", "weight": 2.0, "year": 2007}, {"source": "6", "target": "47", "source_name": "elvis presley", "target_name": "hard rock", "weight": 1.0, "year": 2007}, {"source": "6", "target": "48", "source_name": "elvis presley", "target_name": "pop music", "weight": 1.0, "year": 2007}, {"source": "6", "target": "51", "source_name": "elvis presley", "target_name": "cultural identity", "weight": 1.0, "year": 2007}, {"source": "6", "target": "53", "source_name": "elvis presley", "target_name": "popular music", "weight": 4.0, "year": 2007}, {"source": "6", "target": "54", "source_name": "elvis presley", "target_name": "american popular music", "weight": 2.0, "year": 2007}, {"source": "6", "target": "56", "source_name": "elvis presley", "target_name": "bruce springsteen", "weight": 1.0, "year": 2007}, {"source": "6", "target": "60", "source_name": "elvis presley", "target_name": "cultural studies", "weight": 1.0, "year": 2007}, {"source": "6", "target": "72", "source_name": "elvis presley", "target_name": "jimi hendrix", "weight": 1.0, "year": 2007}, {"source": "6", "target": "74", "source_name": "elvis presley", "target_name": "united states", "weight": 2.0, "year": 2007}, {"source": "6", "target": "77", "source_name": "elvis presley", "target_name": "rock music", "weight": 2.0, "year": 2007}, {"source": "6", "target": "78", "source_name": "elvis presley", "target_name": "hip hop", "weight": 1.0, "year": 2007}, {"source": "6", "target": "79", "source_name": "elvis presley", "target_name": "popular culture", "weight": 1.0, "year": 2007}, {"source": "6", "target": "80", "source_name": "elvis presley", "target_name": "folk music", "weight": 1.0, "year": 2007}, {"source": "6", "target": "82", "source_name": "elvis presley", "target_name": "heavy metal", "weight": 1.0, "year": 2007}, {"source": "7", "target": "10", "source_name": "nineteenth century", "target_name": "african american", "weight": 1.0, "year": 2007}, {"source": "7", "target": "19", "source_name": "nineteenth century", "target_name": "music video", "weight": 1.0, "year": 2007}, {"source": "7", "target": "22", "source_name": "nineteenth century", "target_name": "chamber music", "weight": 1.0, "year": 2007}, {"source": "7", "target": "34", "source_name": "nineteenth century", "target_name": "mass media", "weight": 1.0, "year": 2007}, {"source": "7", "target": "36", "source_name": "nineteenth century", "target_name": "music industry", "weight": 1.0, "year": 2007}, {"source": "7", "target": "38", "source_name": "nineteenth century", "target_name": "summary additional listening", "weight": 1.0, "year": 2007}, {"source": "7", "target": "40", "source_name": "nineteenth century", "target_name": "musical instruments", "weight": 1.0, "year": 2007}, {"source": "7", "target": "43", "source_name": "nineteenth century", "target_name": "music education", "weight": 1.0, "year": 2007}, {"source": "7", "target": "52", "source_name": "nineteenth century", "target_name": "folk song", "weight": 2.0, "year": 2007}, {"source": "7", "target": "53", "source_name": "nineteenth century", "target_name": "popular music", "weight": 2.0, "year": 2007}, {"source": "7", "target": "54", "source_name": "nineteenth century", "target_name": "american popular music", "weight": 1.0, "year": 2007}, {"source": "7", "target": "65", "source_name": "nineteenth century", "target_name": "country music", "weight": 1.0, "year": 2007}, {"source": "7", "target": "69", "source_name": "nineteenth century", "target_name": "classical music", "weight": 2.0, "year": 2007}, {"source": "7", "target": "70", "source_name": "nineteenth century", "target_name": "world war", "weight": 1.0, "year": 2007}, {"source": "7", "target": "74", "source_name": "nineteenth century", "target_name": "united states", "weight": 2.0, "year": 2007}, {"source": "7", "target": "79", "source_name": "nineteenth century", "target_name": "popular culture", "weight": 1.0, "year": 2007}, {"source": "7", "target": "80", "source_name": "nineteenth century", "target_name": "folk music", "weight": 1.0, "year": 2007}, {"source": "7", "target": "89", "source_name": "nineteenth century", "target_name": "electronic music", "weight": 1.0, "year": 2007}, {"source": "8", "target": "20", "source_name": "christian rock", "target_name": "garage rock", "weight": 1.0, "year": 2007}, {"source": "8", "target": "36", "source_name": "christian rock", "target_name": "music industry", "weight": 1.0, "year": 2007}, {"source": "8", "target": "44", "source_name": "christian rock", "target_name": "alternative rock", "weight": 1.0, "year": 2007}, {"source": "8", "target": "53", "source_name": "christian rock", "target_name": "popular music", "weight": 2.0, "year": 2007}, {"source": "8", "target": "57", "source_name": "christian rock", "target_name": "north america", "weight": 1.0, "year": 2007}, {"source": "8", "target": "65", "source_name": "christian rock", "target_name": "country music", "weight": 1.0, "year": 2007}, {"source": "8", "target": "73", "source_name": "christian rock", "target_name": "southern rock", "weight": 1.0, "year": 2007}, {"source": "8", "target": "77", "source_name": "christian rock", "target_name": "rock music", "weight": 1.0, "year": 2007}, {"source": "8", "target": "79", "source_name": "christian rock", "target_name": "popular culture", "weight": 1.0, "year": 2007}, {"source": "8", "target": "80", "source_name": "christian rock", "target_name": "folk music", "weight": 1.0, "year": 2007}, {"source": "9", "target": "10", "source_name": "compact disc", "target_name": "african american", "weight": 1.0, "year": 2007}, {"source": "9", "target": "24", "source_name": "compact disc", "target_name": "punk rock", "weight": 1.0, "year": 2007}, {"source": "9", "target": "29", "source_name": "compact disc", "target_name": "rolling stone", "weight": 1.0, "year": 2007}, {"source": "9", "target": "36", "source_name": "compact disc", "target_name": "music industry", "weight": 1.0, "year": 2007}, {"source": "9", "target": "37", "source_name": "compact disc", "target_name": "middle ages", "weight": 1.0, "year": 2007}, {"source": "9", "target": "48", "source_name": "compact disc", "target_name": "pop music", "weight": 1.0, "year": 2007}, {"source": "9", "target": "53", "source_name": "compact disc", "target_name": "popular music", "weight": 2.0, "year": 2007}, {"source": "9", "target": "74", "source_name": "compact disc", "target_name": "united states", "weight": 1.0, "year": 2007}, {"source": "9", "target": "77", "source_name": "compact disc", "target_name": "rock music", "weight": 1.0, "year": 2007}, {"source": "9", "target": "79", "source_name": "compact disc", "target_name": "popular culture", "weight": 1.0, "year": 2007}, {"source": "9", "target": "80", "source_name": "compact disc", "target_name": "folk music", "weight": 2.0, "year": 2007}, {"source": "9", "target": "89", "source_name": "compact disc", "target_name": "electronic music", "weight": 1.0, "year": 2007}, {"source": "10", "target": "15", "source_name": "african american", "target_name": "musical theatre", "weight": 1.0, "year": 2007}, {"source": "10", "target": "17", "source_name": "african american", "target_name": "civil rights", "weight": 1.0, "year": 2007}, {"source": "10", "target": "19", "source_name": "african american", "target_name": "music video", "weight": 1.0, "year": 2007}, {"source": "10", "target": "22", "source_name": "african american", "target_name": "chamber music", "weight": 1.0, "year": 2007}, {"source": "10", "target": "24", "source_name": "african american", "target_name": "punk rock", "weight": 1.0, "year": 2007}, {"source": "10", "target": "36", "source_name": "african american", "target_name": "music industry", "weight": 1.0, "year": 2007}, {"source": "10", "target": "38", "source_name": "african american", "target_name": "summary additional listening", "weight": 1.0, "year": 2007}, {"source": "10", "target": "40", "source_name": "african american", "target_name": "musical instruments", "weight": 1.0, "year": 2007}, {"source": "10", "target": "52", "source_name": "african american", "target_name": "folk song", "weight": 1.0, "year": 2007}, {"source": "10", "target": "53", "source_name": "african american", "target_name": "popular music", "weight": 5.0, "year": 2007}, {"source": "10", "target": "54", "source_name": "african american", "target_name": "american popular music", "weight": 1.0, "year": 2007}, {"source": "10", "target": "65", "source_name": "african american", "target_name": "country music", "weight": 1.0, "year": 2007}, {"source": "10", "target": "69", "source_name": "african american", "target_name": "classical music", "weight": 1.0, "year": 2007}, {"source": "10", "target": "74", "source_name": "african american", "target_name": "united states", "weight": 3.0, "year": 2007}, {"source": "10", "target": "78", "source_name": "african american", "target_name": "hip hop", "weight": 1.0, "year": 2007}, {"source": "10", "target": "79", "source_name": "african american", "target_name": "popular culture", "weight": 2.0, "year": 2007}, {"source": "10", "target": "80", "source_name": "african american", "target_name": "folk music", "weight": 2.0, "year": 2007}, {"source": "10", "target": "89", "source_name": "african american", "target_name": "electronic music", "weight": 1.0, "year": 2007}, {"source": "11", "target": "23", "source_name": "south africa", "target_name": "electronic dance music", "weight": 1.0, "year": 2007}, {"source": "11", "target": "36", "source_name": "south africa", "target_name": "music industry", "weight": 1.0, "year": 2007}, {"source": "11", "target": "53", "source_name": "south africa", "target_name": "popular music", "weight": 1.0, "year": 2007}, {"source": "11", "target": "74", "source_name": "south africa", "target_name": "united states", "weight": 2.0, "year": 2007}, {"source": "11", "target": "88", "source_name": "south africa", "target_name": "oxford university press", "weight": 1.0, "year": 2007}, {"source": "12", "target": "15", "source_name": "rock opera", "target_name": "musical theatre", "weight": 3.0, "year": 2007}, {"source": "12", "target": "33", "source_name": "rock opera", "target_name": "jesus christ", "weight": 1.0, "year": 2007}, {"source": "12", "target": "53", "source_name": "rock opera", "target_name": "popular music", "weight": 1.0, "year": 2007}, {"source": "12", "target": "77", "source_name": "rock opera", "target_name": "rock music", "weight": 1.0, "year": 2007}, {"source": "12", "target": "79", "source_name": "rock opera", "target_name": "popular culture", "weight": 1.0, "year": 2007}, {"source": "15", "target": "33", "source_name": "musical theatre", "target_name": "jesus christ", "weight": 2.0, "year": 2007}, {"source": "15", "target": "53", "source_name": "musical theatre", "target_name": "popular music", "weight": 1.0, "year": 2007}, {"source": "15", "target": "70", "source_name": "musical theatre", "target_name": "world war", "weight": 1.0, "year": 2007}, {"source": "15", "target": "74", "source_name": "musical theatre", "target_name": "united states", "weight": 1.0, "year": 2007}, {"source": "15", "target": "77", "source_name": "musical theatre", "target_name": "rock music", "weight": 3.0, "year": 2007}, {"source": "15", "target": "87", "source_name": "musical theatre", "target_name": "music hall", "weight": 1.0, "year": 2007}, {"source": "16", "target": "29", "source_name": "bob dylan", "target_name": "rolling stone", "weight": 1.0, "year": 2007}, {"source": "16", "target": "30", "source_name": "bob dylan", "target_name": "rock band", "weight": 1.0, "year": 2007}, {"source": "16", "target": "36", "source_name": "bob dylan", "target_name": "music industry", "weight": 1.0, "year": 2007}, {"source": "16", "target": "42", "source_name": "bob dylan", "target_name": "simon frith", "weight": 1.0, "year": 2007}, {"source": "16", "target": "48", "source_name": "bob dylan", "target_name": "pop music", "weight": 2.0, "year": 2007}, {"source": "16", "target": "52", "source_name": "bob dylan", "target_name": "folk song", "weight": 1.0, "year": 2007}, {"source": "16", "target": "53", "source_name": "bob dylan", "target_name": "popular music", "weight": 5.0, "year": 2007}, {"source": "16", "target": "69", "source_name": "bob dylan", "target_name": "classical music", "weight": 1.0, "year": 2007}, {"source": "16", "target": "72", "source_name": "bob dylan", "target_name": "jimi hendrix", "weight": 2.0, "year": 2007}, {"source": "16", "target": "77", "source_name": "bob dylan", "target_name": "rock music", "weight": 3.0, "year": 2007}, {"source": "16", "target": "80", "source_name": "bob dylan", "target_name": "folk music", "weight": 3.0, "year": 2007}, {"source": "17", "target": "30", "source_name": "civil rights", "target_name": "rock band", "weight": 1.0, "year": 2007}, {"source": "17", "target": "41", "source_name": "civil rights", "target_name": "youth culture", "weight": 1.0, "year": 2007}, {"source": "17", "target": "53", "source_name": "civil rights", "target_name": "popular music", "weight": 2.0, "year": 2007}, {"source": "17", "target": "73", "source_name": "civil rights", "target_name": "southern rock", "weight": 1.0, "year": 2007}, {"source": "17", "target": "74", "source_name": "civil rights", "target_name": "united states", "weight": 1.0, "year": 2007}, {"source": "17", "target": "75", "source_name": "civil rights", "target_name": "world war ii", "weight": 1.0, "year": 2007}, {"source": "17", "target": "77", "source_name": "civil rights", "target_name": "rock music", "weight": 1.0, "year": 2007}, {"source": "17", "target": "79", "source_name": "civil rights", "target_name": "popular culture", "weight": 1.0, "year": 2007}, {"source": "19", "target": "22", "source_name": "music video", "target_name": "chamber music", "weight": 1.0, "year": 2007}, {"source": "19", "target": "30", "source_name": "music video", "target_name": "rock band", "weight": 1.0, "year": 2007}, {"source": "19", "target": "36", "source_name": "music video", "target_name": "music industry", "weight": 2.0, "year": 2007}, {"source": "19", "target": "38", "source_name": "music video", "target_name": "summary additional listening", "weight": 1.0, "year": 2007}, {"source": "19", "target": "40", "source_name": "music video", "target_name": "musical instruments", "weight": 1.0, "year": 2007}, {"source": "19", "target": "47", "source_name": "music video", "target_name": "hard rock", "weight": 1.0, "year": 2007}, {"source": "19", "target": "48", "source_name": "music video", "target_name": "pop music", "weight": 3.0, "year": 2007}, {"source": "19", "target": "49", "source_name": "music video", "target_name": "music theory", "weight": 1.0, "year": 2007}, {"source": "19", "target": "51", "source_name": "music video", "target_name": "cultural identity", "weight": 1.0, "year": 2007}, {"source": "19", "target": "52", "source_name": "music video", "target_name": "folk song", "weight": 1.0, "year": 2007}, {"source": "19", "target": "53", "source_name": "music video", "target_name": "popular music", "weight": 4.0, "year": 2007}, {"source": "19", "target": "54", "source_name": "music video", "target_name": "american popular music", "weight": 1.0, "year": 2007}, {"source": "19", "target": "65", "source_name": "music video", "target_name": "country music", "weight": 3.0, "year": 2007}, {"source": "19", "target": "69", "source_name": "music video", "target_name": "classical music", "weight": 1.0, "year": 2007}, {"source": "19", "target": "72", "source_name": "music video", "target_name": "jimi hendrix", "weight": 1.0, "year": 2007}, {"source": "19", "target": "74", "source_name": "music video", "target_name": "united states", "weight": 2.0, "year": 2007}, {"source": "19", "target": "76", "source_name": "music video", "target_name": "los angeles", "weight": 1.0, "year": 2007}, {"source": "19", "target": "77", "source_name": "music video", "target_name": "rock music", "weight": 7.0, "year": 2007}, {"source": "19", "target": "78", "source_name": "music video", "target_name": "hip hop", "weight": 1.0, "year": 2007}, {"source": "19", "target": "80", "source_name": "music video", "target_name": "folk music", "weight": 1.0, "year": 2007}, {"source": "19", "target": "82", "source_name": "music video", "target_name": "heavy metal", "weight": 1.0, "year": 2007}, {"source": "19", "target": "89", "source_name": "music video", "target_name": "electronic music", "weight": 1.0, "year": 2007}, {"source": "20", "target": "29", "source_name": "garage rock", "target_name": "rolling stone", "weight": 1.0, "year": 2007}, {"source": "20", "target": "30", "source_name": "garage rock", "target_name": "rock band", "weight": 1.0, "year": 2007}, {"source": "20", "target": "43", "source_name": "garage rock", "target_name": "music education", "weight": 1.0, "year": 2007}, {"source": "20", "target": "44", "source_name": "garage rock", "target_name": "alternative rock", "weight": 1.0, "year": 2007}, {"source": "20", "target": "53", "source_name": "garage rock", "target_name": "popular music", "weight": 1.0, "year": 2007}, {"source": "20", "target": "57", "source_name": "garage rock", "target_name": "north america", "weight": 1.0, "year": 2007}, {"source": "20", "target": "65", "source_name": "garage rock", "target_name": "country music", "weight": 1.0, "year": 2007}, {"source": "20", "target": "73", "source_name": "garage rock", "target_name": "southern rock", "weight": 1.0, "year": 2007}, {"source": "20", "target": "80", "source_name": "garage rock", "target_name": "folk music", "weight": 1.0, "year": 2007}, {"source": "21", "target": "47", "source_name": "social protest", "target_name": "hard rock", "weight": 1.0, "year": 2007}, {"source": "21", "target": "48", "source_name": "social protest", "target_name": "pop music", "weight": 1.0, "year": 2007}, {"source": "21", "target": "53", "source_name": "social protest", "target_name": "popular music", "weight": 2.0, "year": 2007}, {"source": "21", "target": "57", "source_name": "social protest", "target_name": "north america", "weight": 2.0, "year": 2007}, {"source": "21", "target": "71", "source_name": "social protest", "target_name": "latin american", "weight": 1.0, "year": 2007}, {"source": "21", "target": "74", "source_name": "social protest", "target_name": "united states", "weight": 1.0, "year": 2007}, {"source": "21", "target": "77", "source_name": "social protest", "target_name": "rock music", "weight": 1.0, "year": 2007}, {"source": "21", "target": "82", "source_name": "social protest", "target_name": "heavy metal", "weight": 1.0, "year": 2007}, {"source": "22", "target": "35", "source_name": "chamber music", "target_name": "ancient greek", "weight": 1.0, "year": 2007}, {"source": "22", "target": "36", "source_name": "chamber music", "target_name": "music industry", "weight": 1.0, "year": 2007}, {"source": "22", "target": "38", "source_name": "chamber music", "target_name": "summary additional listening", "weight": 1.0, "year": 2007}, {"source": "22", "target": "40", "source_name": "chamber music", "target_name": "musical instruments", "weight": 1.0, "year": 2007}, {"source": "22", "target": "52", "source_name": "chamber music", "target_name": "folk song", "weight": 1.0, "year": 2007}, {"source": "22", "target": "53", "source_name": "chamber music", "target_name": "popular music", "weight": 1.0, "year": 2007}, {"source": "22", "target": "54", "source_name": "chamber music", "target_name": "american popular music", "weight": 1.0, "year": 2007}, {"source": "22", "target": "65", "source_name": "chamber music", "target_name": "country music", "weight": 2.0, "year": 2007}, {"source": "22", "target": "69", "source_name": "chamber music", "target_name": "classical music", "weight": 2.0, "year": 2007}, {"source": "22", "target": "74", "source_name": "chamber music", "target_name": "united states", "weight": 1.0, "year": 2007}, {"source": "22", "target": "77", "source_name": "chamber music", "target_name": "rock music", "weight": 1.0, "year": 2007}, {"source": "22", "target": "80", "source_name": "chamber music", "target_name": "folk music", "weight": 2.0, "year": 2007}, {"source": "22", "target": "89", "source_name": "chamber music", "target_name": "electronic music", "weight": 3.0, "year": 2007}, {"source": "23", "target": "36", "source_name": "electronic dance music", "target_name": "music industry", "weight": 1.0, "year": 2007}, {"source": "23", "target": "42", "source_name": "electronic dance music", "target_name": "simon frith", "weight": 2.0, "year": 2007}, {"source": "23", "target": "47", "source_name": "electronic dance music", "target_name": "hard rock", "weight": 1.0, "year": 2007}, {"source": "23", "target": "53", "source_name": "electronic dance music", "target_name": "popular music", "weight": 3.0, "year": 2007}, {"source": "23", "target": "56", "source_name": "electronic dance music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2007}, {"source": "23", "target": "60", "source_name": "electronic dance music", "target_name": "cultural studies", "weight": 1.0, "year": 2007}, {"source": "23", "target": "76", "source_name": "electronic dance music", "target_name": "los angeles", "weight": 1.0, "year": 2007}, {"source": "23", "target": "78", "source_name": "electronic dance music", "target_name": "hip hop", "weight": 1.0, "year": 2007}, {"source": "23", "target": "79", "source_name": "electronic dance music", "target_name": "popular culture", "weight": 1.0, "year": 2007}, {"source": "23", "target": "82", "source_name": "electronic dance music", "target_name": "heavy metal", "weight": 1.0, "year": 2007}, {"source": "24", "target": "36", "source_name": "punk rock", "target_name": "music industry", "weight": 1.0, "year": 2007}, {"source": "24", "target": "42", "source_name": "punk rock", "target_name": "simon frith", "weight": 1.0, "year": 2007}, {"source": "24", "target": "44", "source_name": "punk rock", "target_name": "alternative rock", "weight": 1.0, "year": 2007}, {"source": "24", "target": "48", "source_name": "punk rock", "target_name": "pop music", "weight": 3.0, "year": 2007}, {"source": "24", "target": "53", "source_name": "punk rock", "target_name": "popular music", "weight": 4.0, "year": 2007}, {"source": "24", "target": "74", "source_name": "punk rock", "target_name": "united states", "weight": 1.0, "year": 2007}, {"source": "24", "target": "77", "source_name": "punk rock", "target_name": "rock music", "weight": 4.0, "year": 2007}, {"source": "24", "target": "78", "source_name": "punk rock", "target_name": "hip hop", "weight": 1.0, "year": 2007}, {"source": "24", "target": "80", "source_name": "punk rock", "target_name": "folk music", "weight": 1.0, "year": 2007}, {"source": "24", "target": "82", "source_name": "punk rock", "target_name": "heavy metal", "weight": 1.0, "year": 2007}, {"source": "25", "target": "53", "source_name": "russian rock", "target_name": "popular music", "weight": 1.0, "year": 2007}, {"source": "25", "target": "77", "source_name": "russian rock", "target_name": "rock music", "weight": 1.0, "year": 2007}, {"source": "28", "target": "37", "source_name": "high school", "target_name": "middle ages", "weight": 1.0, "year": 2007}, {"source": "28", "target": "48", "source_name": "high school", "target_name": "pop music", "weight": 1.0, "year": 2007}, {"source": "28", "target": "77", "source_name": "high school", "target_name": "rock music", "weight": 2.0, "year": 2007}, {"source": "28", "target": "82", "source_name": "high school", "target_name": "heavy metal", "weight": 1.0, "year": 2007}, {"source": "29", "target": "36", "source_name": "rolling stone", "target_name": "music industry", "weight": 1.0, "year": 2007}, {"source": "29", "target": "42", "source_name": "rolling stone", "target_name": "simon frith", "weight": 1.0, "year": 2007}, {"source": "29", "target": "48", "source_name": "rolling stone", "target_name": "pop music", "weight": 2.0, "year": 2007}, {"source": "29", "target": "53", "source_name": "rolling stone", "target_name": "popular music", "weight": 4.0, "year": 2007}, {"source": "29", "target": "55", "source_name": "rolling stone", "target_name": "rock criticism", "weight": 2.0, "year": 2007}, {"source": "29", "target": "56", "source_name": "rolling stone", "target_name": "bruce springsteen", "weight": 1.0, "year": 2007}, {"source": "29", "target": "62", "source_name": "rolling stone", "target_name": "led zeppelin", "weight": 1.0, "year": 2007}, {"source": "29", "target": "72", "source_name": "rolling stone", "target_name": "jimi hendrix", "weight": 1.0, "year": 2007}, {"source": "29", "target": "74", "source_name": "rolling stone", "target_name": "united states", "weight": 1.0, "year": 2007}, {"source": "29", "target": "77", "source_name": "rolling stone", "target_name": "rock music", "weight": 5.0, "year": 2007}, {"source": "30", "target": "36", "source_name": "rock band", "target_name": "music industry", "weight": 1.0, "year": 2007}, {"source": "30", "target": "43", "source_name": "rock band", "target_name": "music education", "weight": 1.0, "year": 2007}, {"source": "30", "target": "52", "source_name": "rock band", "target_name": "folk song", "weight": 1.0, "year": 2007}, {"source": "30", "target": "53", "source_name": "rock band", "target_name": "popular music", "weight": 7.0, "year": 2007}, {"source": "30", "target": "61", "source_name": "rock band", "target_name": "progressive rock", "weight": 3.0, "year": 2007}, {"source": "30", "target": "65", "source_name": "rock band", "target_name": "country music", "weight": 1.0, "year": 2007}, {"source": "30", "target": "69", "source_name": "rock band", "target_name": "classical music", "weight": 1.0, "year": 2007}, {"source": "30", "target": "72", "source_name": "rock band", "target_name": "jimi hendrix", "weight": 1.0, "year": 2007}, {"source": "30", "target": "73", "source_name": "rock band", "target_name": "southern rock", "weight": 2.0, "year": 2007}, {"source": "30", "target": "74", "source_name": "rock band", "target_name": "united states", "weight": 1.0, "year": 2007}, {"source": "30", "target": "76", "source_name": "rock band", "target_name": "los angeles", "weight": 1.0, "year": 2007}, {"source": "30", "target": "77", "source_name": "rock band", "target_name": "rock music", "weight": 9.0, "year": 2007}, {"source": "30", "target": "80", "source_name": "rock band", "target_name": "folk music", "weight": 2.0, "year": 2007}, {"source": "30", "target": "82", "source_name": "rock band", "target_name": "heavy metal", "weight": 1.0, "year": 2007}, {"source": "32", "target": "43", "source_name": "higher education", "target_name": "music education", "weight": 1.0, "year": 2007}, {"source": "33", "target": "53", "source_name": "jesus christ", "target_name": "popular music", "weight": 1.0, "year": 2007}, {"source": "33", "target": "70", "source_name": "jesus christ", "target_name": "world war", "weight": 1.0, "year": 2007}, {"source": "33", "target": "77", "source_name": "jesus christ", "target_name": "rock music", "weight": 2.0, "year": 2007}, {"source": "34", "target": "40", "source_name": "mass media", "target_name": "musical instruments", "weight": 1.0, "year": 2007}, {"source": "34", "target": "46", "source_name": "mass media", "target_name": "music festival", "weight": 1.0, "year": 2007}, {"source": "34", "target": "48", "source_name": "mass media", "target_name": "pop music", "weight": 1.0, "year": 2007}, {"source": "34", "target": "51", "source_name": "mass media", "target_name": "cultural identity", "weight": 1.0, "year": 2007}, {"source": "34", "target": "52", "source_name": "mass media", "target_name": "folk song", "weight": 2.0, "year": 2007}, {"source": "34", "target": "53", "source_name": "mass media", "target_name": "popular music", "weight": 4.0, "year": 2007}, {"source": "34", "target": "66", "source_name": "mass media", "target_name": "hong kong", "weight": 1.0, "year": 2007}, {"source": "34", "target": "69", "source_name": "mass media", "target_name": "classical music", "weight": 1.0, "year": 2007}, {"source": "34", "target": "77", "source_name": "mass media", "target_name": "rock music", "weight": 2.0, "year": 2007}, {"source": "35", "target": "43", "source_name": "ancient greek", "target_name": "music education", "weight": 1.0, "year": 2007}, {"source": "35", "target": "65", "source_name": "ancient greek", "target_name": "country music", "weight": 1.0, "year": 2007}, {"source": "35", "target": "77", "source_name": "ancient greek", "target_name": "rock music", "weight": 1.0, "year": 2007}, {"source": "35", "target": "80", "source_name": "ancient greek", "target_name": "folk music", "weight": 1.0, "year": 2007}, {"source": "35", "target": "89", "source_name": "ancient greek", "target_name": "electronic music", "weight": 1.0, "year": 2007}, {"source": "36", "target": "38", "source_name": "music industry", "target_name": "summary additional listening", "weight": 1.0, "year": 2007}, {"source": "36", "target": "40", "source_name": "music industry", "target_name": "musical instruments", "weight": 1.0, "year": 2007}, {"source": "36", "target": "41", "source_name": "music industry", "target_name": "youth culture", "weight": 1.0, "year": 2007}, {"source": "36", "target": "42", "source_name": "music industry", "target_name": "simon frith", "weight": 2.0, "year": 2007}, {"source": "36", "target": "43", "source_name": "music industry", "target_name": "music education", "weight": 1.0, "year": 2007}, {"source": "36", "target": "47", "source_name": "music industry", "target_name": "hard rock", "weight": 2.0, "year": 2007}, {"source": "36", "target": "48", "source_name": "music industry", "target_name": "pop music", "weight": 6.0, "year": 2007}, {"source": "36", "target": "51", "source_name": "music industry", "target_name": "cultural identity", "weight": 1.0, "year": 2007}, {"source": "36", "target": "52", "source_name": "music industry", "target_name": "folk song", "weight": 1.0, "year": 2007}, {"source": "36", "target": "53", "source_name": "music industry", "target_name": "popular music", "weight": 19.0, "year": 2007}, {"source": "36", "target": "54", "source_name": "music industry", "target_name": "american popular music", "weight": 1.0, "year": 2007}, {"source": "36", "target": "56", "source_name": "music industry", "target_name": "bruce springsteen", "weight": 1.0, "year": 2007}, {"source": "36", "target": "61", "source_name": "music industry", "target_name": "progressive rock", "weight": 1.0, "year": 2007}, {"source": "36", "target": "65", "source_name": "music industry", "target_name": "country music", "weight": 2.0, "year": 2007}, {"source": "36", "target": "66", "source_name": "music industry", "target_name": "hong kong", "weight": 1.0, "year": 2007}, {"source": "36", "target": "67", "source_name": "music industry", "target_name": "rock art", "weight": 1.0, "year": 2007}, {"source": "36", "target": "68", "source_name": "music industry", "target_name": "hearing loss", "weight": 1.0, "year": 2007}, {"source": "36", "target": "69", "source_name": "music industry", "target_name": "classical music", "weight": 3.0, "year": 2007}, {"source": "36", "target": "72", "source_name": "music industry", "target_name": "jimi hendrix", "weight": 3.0, "year": 2007}, {"source": "36", "target": "74", "source_name": "music industry", "target_name": "united states", "weight": 3.0, "year": 2007}, {"source": "36", "target": "76", "source_name": "music industry", "target_name": "los angeles", "weight": 2.0, "year": 2007}, {"source": "36", "target": "77", "source_name": "music industry", "target_name": "rock music", "weight": 9.0, "year": 2007}, {"source": "36", "target": "78", "source_name": "music industry", "target_name": "hip hop", "weight": 4.0, "year": 2007}, {"source": "36", "target": "79", "source_name": "music industry", "target_name": "popular culture", "weight": 4.0, "year": 2007}, {"source": "36", "target": "80", "source_name": "music industry", "target_name": "folk music", "weight": 3.0, "year": 2007}, {"source": "36", "target": "82", "source_name": "music industry", "target_name": "heavy metal", "weight": 2.0, "year": 2007}, {"source": "36", "target": "83", "source_name": "music industry", "target_name": "folk rock", "weight": 1.0, "year": 2007}, {"source": "36", "target": "89", "source_name": "music industry", "target_name": "electronic music", "weight": 1.0, "year": 2007}, {"source": "37", "target": "58", "source_name": "middle ages", "target_name": "music therapy", "weight": 1.0, "year": 2007}, {"source": "37", "target": "69", "source_name": "middle ages", "target_name": "classical music", "weight": 1.0, "year": 2007}, {"source": "37", "target": "77", "source_name": "middle ages", "target_name": "rock music", "weight": 1.0, "year": 2007}, {"source": "37", "target": "80", "source_name": "middle ages", "target_name": "folk music", "weight": 2.0, "year": 2007}, {"source": "38", "target": "40", "source_name": "summary additional listening", "target_name": "musical instruments", "weight": 1.0, "year": 2007}, {"source": "38", "target": "52", "source_name": "summary additional listening", "target_name": "folk song", "weight": 1.0, "year": 2007}, {"source": "38", "target": "53", "source_name": "summary additional listening", "target_name": "popular music", "weight": 1.0, "year": 2007}, {"source": "38", "target": "54", "source_name": "summary additional listening", "target_name": "american popular music", "weight": 1.0, "year": 2007}, {"source": "38", "target": "65", "source_name": "summary additional listening", "target_name": "country music", "weight": 1.0, "year": 2007}, {"source": "38", "target": "69", "source_name": "summary additional listening", "target_name": "classical music", "weight": 1.0, "year": 2007}, {"source": "38", "target": "74", "source_name": "summary additional listening", "target_name": "united states", "weight": 1.0, "year": 2007}, {"source": "38", "target": "80", "source_name": "summary additional listening", "target_name": "folk music", "weight": 1.0, "year": 2007}, {"source": "38", "target": "89", "source_name": "summary additional listening", "target_name": "electronic music", "weight": 1.0, "year": 2007}, {"source": "40", "target": "43", "source_name": "musical instruments", "target_name": "music education", "weight": 1.0, "year": 2007}, {"source": "40", "target": "49", "source_name": "musical instruments", "target_name": "music theory", "weight": 1.0, "year": 2007}, {"source": "40", "target": "52", "source_name": "musical instruments", "target_name": "folk song", "weight": 1.0, "year": 2007}, {"source": "40", "target": "53", "source_name": "musical instruments", "target_name": "popular music", "weight": 2.0, "year": 2007}, {"source": "40", "target": "54", "source_name": "musical instruments", "target_name": "american popular music", "weight": 2.0, "year": 2007}, {"source": "40", "target": "65", "source_name": "musical instruments", "target_name": "country music", "weight": 1.0, "year": 2007}, {"source": "40", "target": "69", "source_name": "musical instruments", "target_name": "classical music", "weight": 1.0, "year": 2007}, {"source": "40", "target": "70", "source_name": "musical instruments", "target_name": "world war", "weight": 1.0, "year": 2007}, {"source": "40", "target": "74", "source_name": "musical instruments", "target_name": "united states", "weight": 2.0, "year": 2007}, {"source": "40", "target": "75", "source_name": "musical instruments", "target_name": "world war ii", "weight": 1.0, "year": 2007}, {"source": "40", "target": "80", "source_name": "musical instruments", "target_name": "folk music", "weight": 1.0, "year": 2007}, {"source": "40", "target": "89", "source_name": "musical instruments", "target_name": "electronic music", "weight": 2.0, "year": 2007}, {"source": "41", "target": "48", "source_name": "youth culture", "target_name": "pop music", "weight": 3.0, "year": 2007}, {"source": "41", "target": "51", "source_name": "youth culture", "target_name": "cultural identity", "weight": 2.0, "year": 2007}, {"source": "41", "target": "53", "source_name": "youth culture", "target_name": "popular music", "weight": 2.0, "year": 2007}, {"source": "41", "target": "60", "source_name": "youth culture", "target_name": "cultural studies", "weight": 2.0, "year": 2007}, {"source": "41", "target": "66", "source_name": "youth culture", "target_name": "hong kong", "weight": 1.0, "year": 2007}, {"source": "41", "target": "74", "source_name": "youth culture", "target_name": "united states", "weight": 1.0, "year": 2007}, {"source": "41", "target": "75", "source_name": "youth culture", "target_name": "world war ii", "weight": 1.0, "year": 2007}, {"source": "41", "target": "77", "source_name": "youth culture", "target_name": "rock music", "weight": 3.0, "year": 2007}, {"source": "42", "target": "47", "source_name": "simon frith", "target_name": "hard rock", "weight": 1.0, "year": 2007}, {"source": "42", "target": "48", "source_name": "simon frith", "target_name": "pop music", "weight": 6.0, "year": 2007}, {"source": "42", "target": "51", "source_name": "simon frith", "target_name": "cultural identity", "weight": 1.0, "year": 2007}, {"source": "42", "target": "53", "source_name": "simon frith", "target_name": "popular music", "weight": 4.0, "year": 2007}, {"source": "42", "target": "55", "source_name": "simon frith", "target_name": "rock criticism", "weight": 2.0, "year": 2007}, {"source": "42", "target": "56", "source_name": "simon frith", "target_name": "bruce springsteen", "weight": 1.0, "year": 2007}, {"source": "42", "target": "57", "source_name": "simon frith", "target_name": "north america", "weight": 1.0, "year": 2007}, {"source": "42", "target": "60", "source_name": "simon frith", "target_name": "cultural studies", "weight": 1.0, "year": 2007}, {"source": "42", "target": "65", "source_name": "simon frith", "target_name": "country music", "weight": 1.0, "year": 2007}, {"source": "42", "target": "72", "source_name": "simon frith", "target_name": "jimi hendrix", "weight": 1.0, "year": 2007}, {"source": "42", "target": "76", "source_name": "simon frith", "target_name": "los angeles", "weight": 1.0, "year": 2007}, {"source": "42", "target": "77", "source_name": "simon frith", "target_name": "rock music", "weight": 2.0, "year": 2007}, {"source": "42", "target": "78", "source_name": "simon frith", "target_name": "hip hop", "weight": 1.0, "year": 2007}, {"source": "42", "target": "79", "source_name": "simon frith", "target_name": "popular culture", "weight": 1.0, "year": 2007}, {"source": "42", "target": "82", "source_name": "simon frith", "target_name": "heavy metal", "weight": 1.0, "year": 2007}, {"source": "43", "target": "49", "source_name": "music education", "target_name": "music theory", "weight": 2.0, "year": 2007}, {"source": "43", "target": "53", "source_name": "music education", "target_name": "popular music", "weight": 4.0, "year": 2007}, {"source": "43", "target": "60", "source_name": "music education", "target_name": "cultural studies", "weight": 1.0, "year": 2007}, {"source": "43", "target": "69", "source_name": "music education", "target_name": "classical music", "weight": 1.0, "year": 2007}, {"source": "43", "target": "77", "source_name": "music education", "target_name": "rock music", "weight": 1.0, "year": 2007}, {"source": "43", "target": "80", "source_name": "music education", "target_name": "folk music", "weight": 3.0, "year": 2007}, {"source": "44", "target": "48", "source_name": "alternative rock", "target_name": "pop music", "weight": 1.0, "year": 2007}, {"source": "44", "target": "53", "source_name": "alternative rock", "target_name": "popular music", "weight": 7.0, "year": 2007}, {"source": "44", "target": "57", "source_name": "alternative rock", "target_name": "north america", "weight": 3.0, "year": 2007}, {"source": "44", "target": "65", "source_name": "alternative rock", "target_name": "country music", "weight": 2.0, "year": 2007}, {"source": "44", "target": "67", "source_name": "alternative rock", "target_name": "rock art", "weight": 1.0, "year": 2007}, {"source": "44", "target": "73", "source_name": "alternative rock", "target_name": "southern rock", "weight": 1.0, "year": 2007}, {"source": "44", "target": "74", "source_name": "alternative rock", "target_name": "united states", "weight": 2.0, "year": 2007}, {"source": "44", "target": "77", "source_name": "alternative rock", "target_name": "rock music", "weight": 4.0, "year": 2007}, {"source": "44", "target": "78", "source_name": "alternative rock", "target_name": "hip hop", "weight": 1.0, "year": 2007}, {"source": "44", "target": "80", "source_name": "alternative rock", "target_name": "folk music", "weight": 1.0, "year": 2007}, {"source": "47", "target": "48", "source_name": "hard rock", "target_name": "pop music", "weight": 1.0, "year": 2007}, {"source": "47", "target": "53", "source_name": "hard rock", "target_name": "popular music", "weight": 2.0, "year": 2007}, {"source": "47", "target": "56", "source_name": "hard rock", "target_name": "bruce springsteen", "weight": 1.0, "year": 2007}, {"source": "47", "target": "57", "source_name": "hard rock", "target_name": "north america", "weight": 1.0, "year": 2007}, {"source": "47", "target": "69", "source_name": "hard rock", "target_name": "classical music", "weight": 1.0, "year": 2007}, {"source": "47", "target": "77", "source_name": "hard rock", "target_name": "rock music", "weight": 6.0, "year": 2007}, {"source": "47", "target": "78", "source_name": "hard rock", "target_name": "hip hop", "weight": 1.0, "year": 2007}, {"source": "47", "target": "79", "source_name": "hard rock", "target_name": "popular culture", "weight": 1.0, "year": 2007}, {"source": "47", "target": "82", "source_name": "hard rock", "target_name": "heavy metal", "weight": 2.0, "year": 2007}, {"source": "47", "target": "89", "source_name": "hard rock", "target_name": "electronic music", "weight": 1.0, "year": 2007}, {"source": "48", "target": "51", "source_name": "pop music", "target_name": "cultural identity", "weight": 3.0, "year": 2007}, {"source": "48", "target": "52", "source_name": "pop music", "target_name": "folk song", "weight": 1.0, "year": 2007}, {"source": "48", "target": "53", "source_name": "pop music", "target_name": "popular music", "weight": 16.0, "year": 2007}, {"source": "48", "target": "55", "source_name": "pop music", "target_name": "rock criticism", "weight": 2.0, "year": 2007}, {"source": "48", "target": "57", "source_name": "pop music", "target_name": "north america", "weight": 2.0, "year": 2007}, {"source": "48", "target": "60", "source_name": "pop music", "target_name": "cultural studies", "weight": 1.0, "year": 2007}, {"source": "48", "target": "64", "source_name": "pop music", "target_name": "english language", "weight": 1.0, "year": 2007}, {"source": "48", "target": "65", "source_name": "pop music", "target_name": "country music", "weight": 1.0, "year": 2007}, {"source": "48", "target": "66", "source_name": "pop music", "target_name": "hong kong", "weight": 2.0, "year": 2007}, {"source": "48", "target": "67", "source_name": "pop music", "target_name": "rock art", "weight": 1.0, "year": 2007}, {"source": "48", "target": "70", "source_name": "pop music", "target_name": "world war", "weight": 2.0, "year": 2007}, {"source": "48", "target": "71", "source_name": "pop music", "target_name": "latin american", "weight": 1.0, "year": 2007}, {"source": "48", "target": "72", "source_name": "pop music", "target_name": "jimi hendrix", "weight": 2.0, "year": 2007}, {"source": "48", "target": "74", "source_name": "pop music", "target_name": "united states", "weight": 4.0, "year": 2007}, {"source": "48", "target": "77", "source_name": "pop music", "target_name": "rock music", "weight": 14.0, "year": 2007}, {"source": "48", "target": "78", "source_name": "pop music", "target_name": "hip hop", "weight": 1.0, "year": 2007}, {"source": "48", "target": "79", "source_name": "pop music", "target_name": "popular culture", "weight": 2.0, "year": 2007}, {"source": "48", "target": "82", "source_name": "pop music", "target_name": "heavy metal", "weight": 1.0, "year": 2007}, {"source": "48", "target": "83", "source_name": "pop music", "target_name": "folk rock", "weight": 1.0, "year": 2007}, {"source": "49", "target": "53", "source_name": "music theory", "target_name": "popular music", "weight": 3.0, "year": 2007}, {"source": "49", "target": "57", "source_name": "music theory", "target_name": "north america", "weight": 2.0, "year": 2007}, {"source": "49", "target": "72", "source_name": "music theory", "target_name": "jimi hendrix", "weight": 1.0, "year": 2007}, {"source": "49", "target": "77", "source_name": "music theory", "target_name": "rock music", "weight": 2.0, "year": 2007}, {"source": "49", "target": "89", "source_name": "music theory", "target_name": "electronic music", "weight": 1.0, "year": 2007}, {"source": "50", "target": "53", "source_name": "hollywood film", "target_name": "popular music", "weight": 1.0, "year": 2007}, {"source": "50", "target": "79", "source_name": "hollywood film", "target_name": "popular culture", "weight": 1.0, "year": 2007}, {"source": "51", "target": "52", "source_name": "cultural identity", "target_name": "folk song", "weight": 1.0, "year": 2007}, {"source": "51", "target": "53", "source_name": "cultural identity", "target_name": "popular music", "weight": 2.0, "year": 2007}, {"source": "51", "target": "60", "source_name": "cultural identity", "target_name": "cultural studies", "weight": 2.0, "year": 2007}, {"source": "51", "target": "65", "source_name": "cultural identity", "target_name": "country music", "weight": 1.0, "year": 2007}, {"source": "51", "target": "66", "source_name": "cultural identity", "target_name": "hong kong", "weight": 1.0, "year": 2007}, {"source": "51", "target": "72", "source_name": "cultural identity", "target_name": "jimi hendrix", "weight": 2.0, "year": 2007}, {"source": "51", "target": "74", "source_name": "cultural identity", "target_name": "united states", "weight": 2.0, "year": 2007}, {"source": "51", "target": "77", "source_name": "cultural identity", "target_name": "rock music", "weight": 6.0, "year": 2007}, {"source": "51", "target": "79", "source_name": "cultural identity", "target_name": "popular culture", "weight": 2.0, "year": 2007}, {"source": "52", "target": "53", "source_name": "folk song", "target_name": "popular music", "weight": 6.0, "year": 2007}, {"source": "52", "target": "54", "source_name": "folk song", "target_name": "american popular music", "weight": 1.0, "year": 2007}, {"source": "52", "target": "65", "source_name": "folk song", "target_name": "country music", "weight": 1.0, "year": 2007}, {"source": "52", "target": "66", "source_name": "folk song", "target_name": "hong kong", "weight": 1.0, "year": 2007}, {"source": "52", "target": "69", "source_name": "folk song", "target_name": "classical music", "weight": 2.0, "year": 2007}, {"source": "52", "target": "74", "source_name": "folk song", "target_name": "united states", "weight": 1.0, "year": 2007}, {"source": "52", "target": "77", "source_name": "folk song", "target_name": "rock music", "weight": 3.0, "year": 2007}, {"source": "52", "target": "80", "source_name": "folk song", "target_name": "folk music", "weight": 4.0, "year": 2007}, {"source": "52", "target": "87", "source_name": "folk song", "target_name": "music hall", "weight": 1.0, "year": 2007}, {"source": "52", "target": "89", "source_name": "folk song", "target_name": "electronic music", "weight": 1.0, "year": 2007}, {"source": "53", "target": "54", "source_name": "popular music", "target_name": "american popular music", "weight": 7.0, "year": 2007}, {"source": "53", "target": "55", "source_name": "popular music", "target_name": "rock criticism", "weight": 2.0, "year": 2007}, {"source": "53", "target": "56", "source_name": "popular music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2007}, {"source": "53", "target": "57", "source_name": "popular music", "target_name": "north america", "weight": 5.0, "year": 2007}, {"source": "53", "target": "58", "source_name": "popular music", "target_name": "music therapy", "weight": 1.0, "year": 2007}, {"source": "53", "target": "59", "source_name": "popular music", "target_name": "college students", "weight": 1.0, "year": 2007}, {"source": "53", "target": "60", "source_name": "popular music", "target_name": "cultural studies", "weight": 5.0, "year": 2007}, {"source": "53", "target": "61", "source_name": "popular music", "target_name": "progressive rock", "weight": 4.0, "year": 2007}, {"source": "53", "target": "62", "source_name": "popular music", "target_name": "led zeppelin", "weight": 2.0, "year": 2007}, {"source": "53", "target": "65", "source_name": "popular music", "target_name": "country music", "weight": 8.0, "year": 2007}, {"source": "53", "target": "66", "source_name": "popular music", "target_name": "hong kong", "weight": 2.0, "year": 2007}, {"source": "53", "target": "67", "source_name": "popular music", "target_name": "rock art", "weight": 2.0, "year": 2007}, {"source": "53", "target": "69", "source_name": "popular music", "target_name": "classical music", "weight": 7.0, "year": 2007}, {"source": "53", "target": "70", "source_name": "popular music", "target_name": "world war", "weight": 3.0, "year": 2007}, {"source": "53", "target": "71", "source_name": "popular music", "target_name": "latin american", "weight": 2.0, "year": 2007}, {"source": "53", "target": "72", "source_name": "popular music", "target_name": "jimi hendrix", "weight": 4.0, "year": 2007}, {"source": "53", "target": "73", "source_name": "popular music", "target_name": "southern rock", "weight": 2.0, "year": 2007}, {"source": "53", "target": "74", "source_name": "popular music", "target_name": "united states", "weight": 12.0, "year": 2007}, {"source": "53", "target": "75", "source_name": "popular music", "target_name": "world war ii", "weight": 2.0, "year": 2007}, {"source": "53", "target": "76", "source_name": "popular music", "target_name": "los angeles", "weight": 5.0, "year": 2007}, {"source": "53", "target": "77", "source_name": "popular music", "target_name": "rock music", "weight": 48.0, "year": 2007}, {"source": "53", "target": "78", "source_name": "popular music", "target_name": "hip hop", "weight": 5.0, "year": 2007}, {"source": "53", "target": "79", "source_name": "popular music", "target_name": "popular culture", "weight": 12.0, "year": 2007}, {"source": "53", "target": "80", "source_name": "popular music", "target_name": "folk music", "weight": 10.0, "year": 2007}, {"source": "53", "target": "82", "source_name": "popular music", "target_name": "heavy metal", "weight": 6.0, "year": 2007}, {"source": "53", "target": "83", "source_name": "popular music", "target_name": "folk rock", "weight": 1.0, "year": 2007}, {"source": "53", "target": "85", "source_name": "popular music", "target_name": "jewish music", "weight": 1.0, "year": 2007}, {"source": "53", "target": "87", "source_name": "popular music", "target_name": "music hall", "weight": 2.0, "year": 2007}, {"source": "53", "target": "88", "source_name": "popular music", "target_name": "oxford university press", "weight": 2.0, "year": 2007}, {"source": "53", "target": "89", "source_name": "popular music", "target_name": "electronic music", "weight": 3.0, "year": 2007}, {"source": "54", "target": "65", "source_name": "american popular music", "target_name": "country music", "weight": 3.0, "year": 2007}, {"source": "54", "target": "69", "source_name": "american popular music", "target_name": "classical music", "weight": 2.0, "year": 2007}, {"source": "54", "target": "71", "source_name": "american popular music", "target_name": "latin american", "weight": 1.0, "year": 2007}, {"source": "54", "target": "74", "source_name": "american popular music", "target_name": "united states", "weight": 3.0, "year": 2007}, {"source": "54", "target": "76", "source_name": "american popular music", "target_name": "los angeles", "weight": 1.0, "year": 2007}, {"source": "54", "target": "77", "source_name": "american popular music", "target_name": "rock music", "weight": 1.0, "year": 2007}, {"source": "54", "target": "79", "source_name": "american popular music", "target_name": "popular culture", "weight": 1.0, "year": 2007}, {"source": "54", "target": "80", "source_name": "american popular music", "target_name": "folk music", "weight": 1.0, "year": 2007}, {"source": "54", "target": "89", "source_name": "american popular music", "target_name": "electronic music", "weight": 1.0, "year": 2007}, {"source": "55", "target": "57", "source_name": "rock criticism", "target_name": "north america", "weight": 1.0, "year": 2007}, {"source": "55", "target": "61", "source_name": "rock criticism", "target_name": "progressive rock", "weight": 2.0, "year": 2007}, {"source": "55", "target": "65", "source_name": "rock criticism", "target_name": "country music", "weight": 1.0, "year": 2007}, {"source": "55", "target": "74", "source_name": "rock criticism", "target_name": "united states", "weight": 1.0, "year": 2007}, {"source": "55", "target": "77", "source_name": "rock criticism", "target_name": "rock music", "weight": 3.0, "year": 2007}, {"source": "56", "target": "72", "source_name": "bruce springsteen", "target_name": "jimi hendrix", "weight": 1.0, "year": 2007}, {"source": "56", "target": "77", "source_name": "bruce springsteen", "target_name": "rock music", "weight": 2.0, "year": 2007}, {"source": "56", "target": "78", "source_name": "bruce springsteen", "target_name": "hip hop", "weight": 1.0, "year": 2007}, {"source": "56", "target": "79", "source_name": "bruce springsteen", "target_name": "popular culture", "weight": 1.0, "year": 2007}, {"source": "56", "target": "82", "source_name": "bruce springsteen", "target_name": "heavy metal", "weight": 1.0, "year": 2007}, {"source": "57", "target": "65", "source_name": "north america", "target_name": "country music", "weight": 2.0, "year": 2007}, {"source": "57", "target": "71", "source_name": "north america", "target_name": "latin american", "weight": 1.0, "year": 2007}, {"source": "57", "target": "73", "source_name": "north america", "target_name": "southern rock", "weight": 1.0, "year": 2007}, {"source": "57", "target": "74", "source_name": "north america", "target_name": "united states", "weight": 3.0, "year": 2007}, {"source": "57", "target": "77", "source_name": "north america", "target_name": "rock music", "weight": 2.0, "year": 2007}, {"source": "57", "target": "78", "source_name": "north america", "target_name": "hip hop", "weight": 1.0, "year": 2007}, {"source": "57", "target": "80", "source_name": "north america", "target_name": "folk music", "weight": 2.0, "year": 2007}, {"source": "58", "target": "64", "source_name": "music therapy", "target_name": "english language", "weight": 1.0, "year": 2007}, {"source": "58", "target": "77", "source_name": "music therapy", "target_name": "rock music", "weight": 3.0, "year": 2007}, {"source": "59", "target": "74", "source_name": "college students", "target_name": "united states", "weight": 1.0, "year": 2007}, {"source": "60", "target": "62", "source_name": "cultural studies", "target_name": "led zeppelin", "weight": 1.0, "year": 2007}, {"source": "60", "target": "71", "source_name": "cultural studies", "target_name": "latin american", "weight": 1.0, "year": 2007}, {"source": "60", "target": "76", "source_name": "cultural studies", "target_name": "los angeles", "weight": 1.0, "year": 2007}, {"source": "60", "target": "77", "source_name": "cultural studies", "target_name": "rock music", "weight": 5.0, "year": 2007}, {"source": "60", "target": "79", "source_name": "cultural studies", "target_name": "popular culture", "weight": 4.0, "year": 2007}, {"source": "60", "target": "80", "source_name": "cultural studies", "target_name": "folk music", "weight": 1.0, "year": 2007}, {"source": "60", "target": "85", "source_name": "cultural studies", "target_name": "jewish music", "weight": 1.0, "year": 2007}, {"source": "60", "target": "87", "source_name": "cultural studies", "target_name": "music hall", "weight": 1.0, "year": 2007}, {"source": "60", "target": "88", "source_name": "cultural studies", "target_name": "oxford university press", "weight": 2.0, "year": 2007}, {"source": "61", "target": "69", "source_name": "progressive rock", "target_name": "classical music", "weight": 2.0, "year": 2007}, {"source": "61", "target": "72", "source_name": "progressive rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2007}, {"source": "61", "target": "74", "source_name": "progressive rock", "target_name": "united states", "weight": 1.0, "year": 2007}, {"source": "61", "target": "77", "source_name": "progressive rock", "target_name": "rock music", "weight": 10.0, "year": 2007}, {"source": "61", "target": "80", "source_name": "progressive rock", "target_name": "folk music", "weight": 1.0, "year": 2007}, {"source": "61", "target": "82", "source_name": "progressive rock", "target_name": "heavy metal", "weight": 1.0, "year": 2007}, {"source": "61", "target": "89", "source_name": "progressive rock", "target_name": "electronic music", "weight": 1.0, "year": 2007}, {"source": "62", "target": "77", "source_name": "led zeppelin", "target_name": "rock music", "weight": 1.0, "year": 2007}, {"source": "62", "target": "88", "source_name": "led zeppelin", "target_name": "oxford university press", "weight": 1.0, "year": 2007}, {"source": "64", "target": "70", "source_name": "english language", "target_name": "world war", "weight": 1.0, "year": 2007}, {"source": "64", "target": "74", "source_name": "english language", "target_name": "united states", "weight": 1.0, "year": 2007}, {"source": "64", "target": "77", "source_name": "english language", "target_name": "rock music", "weight": 2.0, "year": 2007}, {"source": "64", "target": "79", "source_name": "english language", "target_name": "popular culture", "weight": 1.0, "year": 2007}, {"source": "65", "target": "69", "source_name": "country music", "target_name": "classical music", "weight": 2.0, "year": 2007}, {"source": "65", "target": "72", "source_name": "country music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2007}, {"source": "65", "target": "73", "source_name": "country music", "target_name": "southern rock", "weight": 2.0, "year": 2007}, {"source": "65", "target": "74", "source_name": "country music", "target_name": "united states", "weight": 2.0, "year": 2007}, {"source": "65", "target": "77", "source_name": "country music", "target_name": "rock music", "weight": 3.0, "year": 2007}, {"source": "65", "target": "79", "source_name": "country music", "target_name": "popular culture", "weight": 1.0, "year": 2007}, {"source": "65", "target": "80", "source_name": "country music", "target_name": "folk music", "weight": 3.0, "year": 2007}, {"source": "65", "target": "89", "source_name": "country music", "target_name": "electronic music", "weight": 2.0, "year": 2007}, {"source": "66", "target": "77", "source_name": "hong kong", "target_name": "rock music", "weight": 2.0, "year": 2007}, {"source": "67", "target": "77", "source_name": "rock art", "target_name": "rock music", "weight": 2.0, "year": 2007}, {"source": "68", "target": "77", "source_name": "hearing loss", "target_name": "rock music", "weight": 2.0, "year": 2007}, {"source": "69", "target": "71", "source_name": "classical music", "target_name": "latin american", "weight": 1.0, "year": 2007}, {"source": "69", "target": "72", "source_name": "classical music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2007}, {"source": "69", "target": "74", "source_name": "classical music", "target_name": "united states", "weight": 4.0, "year": 2007}, {"source": "69", "target": "76", "source_name": "classical music", "target_name": "los angeles", "weight": 1.0, "year": 2007}, {"source": "69", "target": "77", "source_name": "classical music", "target_name": "rock music", "weight": 16.0, "year": 2007}, {"source": "69", "target": "78", "source_name": "classical music", "target_name": "hip hop", "weight": 1.0, "year": 2007}, {"source": "69", "target": "79", "source_name": "classical music", "target_name": "popular culture", "weight": 1.0, "year": 2007}, {"source": "69", "target": "80", "source_name": "classical music", "target_name": "folk music", "weight": 2.0, "year": 2007}, {"source": "69", "target": "82", "source_name": "classical music", "target_name": "heavy metal", "weight": 2.0, "year": 2007}, {"source": "69", "target": "89", "source_name": "classical music", "target_name": "electronic music", "weight": 2.0, "year": 2007}, {"source": "70", "target": "74", "source_name": "world war", "target_name": "united states", "weight": 2.0, "year": 2007}, {"source": "70", "target": "75", "source_name": "world war", "target_name": "world war ii", "weight": 2.0, "year": 2007}, {"source": "70", "target": "77", "source_name": "world war", "target_name": "rock music", "weight": 4.0, "year": 2007}, {"source": "70", "target": "79", "source_name": "world war", "target_name": "popular culture", "weight": 1.0, "year": 2007}, {"source": "70", "target": "80", "source_name": "world war", "target_name": "folk music", "weight": 1.0, "year": 2007}, {"source": "70", "target": "87", "source_name": "world war", "target_name": "music hall", "weight": 1.0, "year": 2007}, {"source": "70", "target": "89", "source_name": "world war", "target_name": "electronic music", "weight": 1.0, "year": 2007}, {"source": "71", "target": "74", "source_name": "latin american", "target_name": "united states", "weight": 3.0, "year": 2007}, {"source": "71", "target": "76", "source_name": "latin american", "target_name": "los angeles", "weight": 2.0, "year": 2007}, {"source": "71", "target": "77", "source_name": "latin american", "target_name": "rock music", "weight": 4.0, "year": 2007}, {"source": "71", "target": "79", "source_name": "latin american", "target_name": "popular culture", "weight": 1.0, "year": 2007}, {"source": "72", "target": "74", "source_name": "jimi hendrix", "target_name": "united states", "weight": 1.0, "year": 2007}, {"source": "72", "target": "77", "source_name": "jimi hendrix", "target_name": "rock music", "weight": 5.0, "year": 2007}, {"source": "72", "target": "79", "source_name": "jimi hendrix", "target_name": "popular culture", "weight": 2.0, "year": 2007}, {"source": "72", "target": "80", "source_name": "jimi hendrix", "target_name": "folk music", "weight": 1.0, "year": 2007}, {"source": "72", "target": "89", "source_name": "jimi hendrix", "target_name": "electronic music", "weight": 1.0, "year": 2007}, {"source": "73", "target": "77", "source_name": "southern rock", "target_name": "rock music", "weight": 1.0, "year": 2007}, {"source": "73", "target": "80", "source_name": "southern rock", "target_name": "folk music", "weight": 1.0, "year": 2007}, {"source": "74", "target": "76", "source_name": "united states", "target_name": "los angeles", "weight": 1.0, "year": 2007}, {"source": "74", "target": "77", "source_name": "united states", "target_name": "rock music", "weight": 9.0, "year": 2007}, {"source": "74", "target": "78", "source_name": "united states", "target_name": "hip hop", "weight": 1.0, "year": 2007}, {"source": "74", "target": "79", "source_name": "united states", "target_name": "popular culture", "weight": 3.0, "year": 2007}, {"source": "74", "target": "80", "source_name": "united states", "target_name": "folk music", "weight": 3.0, "year": 2007}, {"source": "74", "target": "89", "source_name": "united states", "target_name": "electronic music", "weight": 1.0, "year": 2007}, {"source": "76", "target": "77", "source_name": "los angeles", "target_name": "rock music", "weight": 5.0, "year": 2007}, {"source": "76", "target": "79", "source_name": "los angeles", "target_name": "popular culture", "weight": 1.0, "year": 2007}, {"source": "77", "target": "78", "source_name": "rock music", "target_name": "hip hop", "weight": 2.0, "year": 2007}, {"source": "77", "target": "79", "source_name": "rock music", "target_name": "popular culture", "weight": 10.0, "year": 2007}, {"source": "77", "target": "80", "source_name": "rock music", "target_name": "folk music", "weight": 5.0, "year": 2007}, {"source": "77", "target": "82", "source_name": "rock music", "target_name": "heavy metal", "weight": 7.0, "year": 2007}, {"source": "77", "target": "87", "source_name": "rock music", "target_name": "music hall", "weight": 2.0, "year": 2007}, {"source": "77", "target": "88", "source_name": "rock music", "target_name": "oxford university press", "weight": 1.0, "year": 2007}, {"source": "77", "target": "89", "source_name": "rock music", "target_name": "electronic music", "weight": 3.0, "year": 2007}, {"source": "78", "target": "79", "source_name": "hip hop", "target_name": "popular culture", "weight": 2.0, "year": 2007}, {"source": "78", "target": "80", "source_name": "hip hop", "target_name": "folk music", "weight": 1.0, "year": 2007}, {"source": "78", "target": "82", "source_name": "hip hop", "target_name": "heavy metal", "weight": 2.0, "year": 2007}, {"source": "79", "target": "80", "source_name": "popular culture", "target_name": "folk music", "weight": 2.0, "year": 2007}, {"source": "79", "target": "82", "source_name": "popular culture", "target_name": "heavy metal", "weight": 1.0, "year": 2007}, {"source": "79", "target": "85", "source_name": "popular culture", "target_name": "jewish music", "weight": 1.0, "year": 2007}, {"source": "79", "target": "87", "source_name": "popular culture", "target_name": "music hall", "weight": 2.0, "year": 2007}, {"source": "79", "target": "88", "source_name": "popular culture", "target_name": "oxford university press", "weight": 1.0, "year": 2007}, {"source": "80", "target": "85", "source_name": "folk music", "target_name": "jewish music", "weight": 1.0, "year": 2007}, {"source": "80", "target": "87", "source_name": "folk music", "target_name": "music hall", "weight": 1.0, "year": 2007}, {"source": "80", "target": "88", "source_name": "folk music", "target_name": "oxford university press", "weight": 1.0, "year": 2007}, {"source": "80", "target": "89", "source_name": "folk music", "target_name": "electronic music", "weight": 3.0, "year": 2007}, {"source": "85", "target": "88", "source_name": "jewish music", "target_name": "oxford university press", "weight": 1.0, "year": 2007}]}, {"2008": [{"source": "1", "target": "7", "source_name": "rock star", "target_name": "nineteenth century", "weight": 1.0, "year": 2008}, {"source": "1", "target": "9", "source_name": "rock star", "target_name": "compact disc", "weight": 1.0, "year": 2008}, {"source": "1", "target": "28", "source_name": "rock star", "target_name": "high school", "weight": 1.0, "year": 2008}, {"source": "1", "target": "29", "source_name": "rock star", "target_name": "rolling stone", "weight": 1.0, "year": 2008}, {"source": "1", "target": "36", "source_name": "rock star", "target_name": "music industry", "weight": 2.0, "year": 2008}, {"source": "1", "target": "41", "source_name": "rock star", "target_name": "youth culture", "weight": 2.0, "year": 2008}, {"source": "1", "target": "48", "source_name": "rock star", "target_name": "pop music", "weight": 4.0, "year": 2008}, {"source": "1", "target": "51", "source_name": "rock star", "target_name": "cultural identity", "weight": 1.0, "year": 2008}, {"source": "1", "target": "53", "source_name": "rock star", "target_name": "popular music", "weight": 2.0, "year": 2008}, {"source": "1", "target": "69", "source_name": "rock star", "target_name": "classical music", "weight": 1.0, "year": 2008}, {"source": "1", "target": "74", "source_name": "rock star", "target_name": "united states", "weight": 1.0, "year": 2008}, {"source": "1", "target": "77", "source_name": "rock star", "target_name": "rock music", "weight": 7.0, "year": 2008}, {"source": "1", "target": "82", "source_name": "rock star", "target_name": "heavy metal", "weight": 2.0, "year": 2008}, {"source": "2", "target": "19", "source_name": "indie rock", "target_name": "music video", "weight": 1.0, "year": 2008}, {"source": "2", "target": "36", "source_name": "indie rock", "target_name": "music industry", "weight": 1.0, "year": 2008}, {"source": "2", "target": "48", "source_name": "indie rock", "target_name": "pop music", "weight": 1.0, "year": 2008}, {"source": "2", "target": "51", "source_name": "indie rock", "target_name": "cultural identity", "weight": 1.0, "year": 2008}, {"source": "2", "target": "53", "source_name": "indie rock", "target_name": "popular music", "weight": 1.0, "year": 2008}, {"source": "2", "target": "72", "source_name": "indie rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2008}, {"source": "2", "target": "74", "source_name": "indie rock", "target_name": "united states", "weight": 1.0, "year": 2008}, {"source": "2", "target": "77", "source_name": "indie rock", "target_name": "rock music", "weight": 3.0, "year": 2008}, {"source": "2", "target": "78", "source_name": "indie rock", "target_name": "hip hop", "weight": 1.0, "year": 2008}, {"source": "2", "target": "80", "source_name": "indie rock", "target_name": "folk music", "weight": 1.0, "year": 2008}, {"source": "3", "target": "79", "source_name": "glam rock", "target_name": "popular culture", "weight": 1.0, "year": 2008}, {"source": "4", "target": "7", "source_name": "gregorian chant", "target_name": "nineteenth century", "weight": 1.0, "year": 2008}, {"source": "4", "target": "9", "source_name": "gregorian chant", "target_name": "compact disc", "weight": 1.0, "year": 2008}, {"source": "4", "target": "10", "source_name": "gregorian chant", "target_name": "african american", "weight": 1.0, "year": 2008}, {"source": "4", "target": "19", "source_name": "gregorian chant", "target_name": "music video", "weight": 1.0, "year": 2008}, {"source": "4", "target": "22", "source_name": "gregorian chant", "target_name": "chamber music", "weight": 1.0, "year": 2008}, {"source": "4", "target": "36", "source_name": "gregorian chant", "target_name": "music industry", "weight": 1.0, "year": 2008}, {"source": "4", "target": "37", "source_name": "gregorian chant", "target_name": "middle ages", "weight": 1.0, "year": 2008}, {"source": "4", "target": "38", "source_name": "gregorian chant", "target_name": "summary additional listening", "weight": 1.0, "year": 2008}, {"source": "4", "target": "40", "source_name": "gregorian chant", "target_name": "musical instruments", "weight": 1.0, "year": 2008}, {"source": "4", "target": "48", "source_name": "gregorian chant", "target_name": "pop music", "weight": 1.0, "year": 2008}, {"source": "4", "target": "52", "source_name": "gregorian chant", "target_name": "folk song", "weight": 1.0, "year": 2008}, {"source": "4", "target": "53", "source_name": "gregorian chant", "target_name": "popular music", "weight": 1.0, "year": 2008}, {"source": "4", "target": "54", "source_name": "gregorian chant", "target_name": "american popular music", "weight": 1.0, "year": 2008}, {"source": "4", "target": "65", "source_name": "gregorian chant", "target_name": "country music", "weight": 1.0, "year": 2008}, {"source": "4", "target": "69", "source_name": "gregorian chant", "target_name": "classical music", "weight": 1.0, "year": 2008}, {"source": "4", "target": "74", "source_name": "gregorian chant", "target_name": "united states", "weight": 1.0, "year": 2008}, {"source": "4", "target": "80", "source_name": "gregorian chant", "target_name": "folk music", "weight": 1.0, "year": 2008}, {"source": "4", "target": "89", "source_name": "gregorian chant", "target_name": "electronic music", "weight": 1.0, "year": 2008}, {"source": "5", "target": "12", "source_name": "jesus christ superstar", "target_name": "rock opera", "weight": 1.0, "year": 2008}, {"source": "5", "target": "15", "source_name": "jesus christ superstar", "target_name": "musical theatre", "weight": 2.0, "year": 2008}, {"source": "5", "target": "33", "source_name": "jesus christ superstar", "target_name": "jesus christ", "weight": 2.0, "year": 2008}, {"source": "5", "target": "34", "source_name": "jesus christ superstar", "target_name": "mass media", "weight": 1.0, "year": 2008}, {"source": "5", "target": "53", "source_name": "jesus christ superstar", "target_name": "popular music", "weight": 1.0, "year": 2008}, {"source": "5", "target": "77", "source_name": "jesus christ superstar", "target_name": "rock music", "weight": 3.0, "year": 2008}, {"source": "6", "target": "10", "source_name": "elvis presley", "target_name": "african american", "weight": 1.0, "year": 2008}, {"source": "6", "target": "16", "source_name": "elvis presley", "target_name": "bob dylan", "weight": 1.0, "year": 2008}, {"source": "6", "target": "17", "source_name": "elvis presley", "target_name": "civil rights", "weight": 1.0, "year": 2008}, {"source": "6", "target": "23", "source_name": "elvis presley", "target_name": "electronic dance music", "weight": 1.0, "year": 2008}, {"source": "6", "target": "29", "source_name": "elvis presley", "target_name": "rolling stone", "weight": 1.0, "year": 2008}, {"source": "6", "target": "36", "source_name": "elvis presley", "target_name": "music industry", "weight": 2.0, "year": 2008}, {"source": "6", "target": "40", "source_name": "elvis presley", "target_name": "musical instruments", "weight": 1.0, "year": 2008}, {"source": "6", "target": "41", "source_name": "elvis presley", "target_name": "youth culture", "weight": 1.0, "year": 2008}, {"source": "6", "target": "42", "source_name": "elvis presley", "target_name": "simon frith", "weight": 2.0, "year": 2008}, {"source": "6", "target": "47", "source_name": "elvis presley", "target_name": "hard rock", "weight": 1.0, "year": 2008}, {"source": "6", "target": "48", "source_name": "elvis presley", "target_name": "pop music", "weight": 1.0, "year": 2008}, {"source": "6", "target": "51", "source_name": "elvis presley", "target_name": "cultural identity", "weight": 1.0, "year": 2008}, {"source": "6", "target": "53", "source_name": "elvis presley", "target_name": "popular music", "weight": 4.0, "year": 2008}, {"source": "6", "target": "54", "source_name": "elvis presley", "target_name": "american popular music", "weight": 2.0, "year": 2008}, {"source": "6", "target": "56", "source_name": "elvis presley", "target_name": "bruce springsteen", "weight": 1.0, "year": 2008}, {"source": "6", "target": "60", "source_name": "elvis presley", "target_name": "cultural studies", "weight": 1.0, "year": 2008}, {"source": "6", "target": "67", "source_name": "elvis presley", "target_name": "rock art", "weight": 1.0, "year": 2008}, {"source": "6", "target": "72", "source_name": "elvis presley", "target_name": "jimi hendrix", "weight": 1.0, "year": 2008}, {"source": "6", "target": "74", "source_name": "elvis presley", "target_name": "united states", "weight": 2.0, "year": 2008}, {"source": "6", "target": "77", "source_name": "elvis presley", "target_name": "rock music", "weight": 2.0, "year": 2008}, {"source": "6", "target": "78", "source_name": "elvis presley", "target_name": "hip hop", "weight": 1.0, "year": 2008}, {"source": "6", "target": "79", "source_name": "elvis presley", "target_name": "popular culture", "weight": 1.0, "year": 2008}, {"source": "6", "target": "80", "source_name": "elvis presley", "target_name": "folk music", "weight": 1.0, "year": 2008}, {"source": "6", "target": "82", "source_name": "elvis presley", "target_name": "heavy metal", "weight": 1.0, "year": 2008}, {"source": "7", "target": "10", "source_name": "nineteenth century", "target_name": "african american", "weight": 1.0, "year": 2008}, {"source": "7", "target": "19", "source_name": "nineteenth century", "target_name": "music video", "weight": 1.0, "year": 2008}, {"source": "7", "target": "22", "source_name": "nineteenth century", "target_name": "chamber music", "weight": 1.0, "year": 2008}, {"source": "7", "target": "34", "source_name": "nineteenth century", "target_name": "mass media", "weight": 1.0, "year": 2008}, {"source": "7", "target": "36", "source_name": "nineteenth century", "target_name": "music industry", "weight": 1.0, "year": 2008}, {"source": "7", "target": "38", "source_name": "nineteenth century", "target_name": "summary additional listening", "weight": 1.0, "year": 2008}, {"source": "7", "target": "40", "source_name": "nineteenth century", "target_name": "musical instruments", "weight": 1.0, "year": 2008}, {"source": "7", "target": "43", "source_name": "nineteenth century", "target_name": "music education", "weight": 1.0, "year": 2008}, {"source": "7", "target": "52", "source_name": "nineteenth century", "target_name": "folk song", "weight": 2.0, "year": 2008}, {"source": "7", "target": "53", "source_name": "nineteenth century", "target_name": "popular music", "weight": 2.0, "year": 2008}, {"source": "7", "target": "54", "source_name": "nineteenth century", "target_name": "american popular music", "weight": 1.0, "year": 2008}, {"source": "7", "target": "65", "source_name": "nineteenth century", "target_name": "country music", "weight": 1.0, "year": 2008}, {"source": "7", "target": "69", "source_name": "nineteenth century", "target_name": "classical music", "weight": 2.0, "year": 2008}, {"source": "7", "target": "70", "source_name": "nineteenth century", "target_name": "world war", "weight": 2.0, "year": 2008}, {"source": "7", "target": "74", "source_name": "nineteenth century", "target_name": "united states", "weight": 2.0, "year": 2008}, {"source": "7", "target": "79", "source_name": "nineteenth century", "target_name": "popular culture", "weight": 1.0, "year": 2008}, {"source": "7", "target": "80", "source_name": "nineteenth century", "target_name": "folk music", "weight": 1.0, "year": 2008}, {"source": "7", "target": "89", "source_name": "nineteenth century", "target_name": "electronic music", "weight": 1.0, "year": 2008}, {"source": "8", "target": "20", "source_name": "christian rock", "target_name": "garage rock", "weight": 1.0, "year": 2008}, {"source": "8", "target": "36", "source_name": "christian rock", "target_name": "music industry", "weight": 1.0, "year": 2008}, {"source": "8", "target": "44", "source_name": "christian rock", "target_name": "alternative rock", "weight": 1.0, "year": 2008}, {"source": "8", "target": "53", "source_name": "christian rock", "target_name": "popular music", "weight": 2.0, "year": 2008}, {"source": "8", "target": "57", "source_name": "christian rock", "target_name": "north america", "weight": 1.0, "year": 2008}, {"source": "8", "target": "65", "source_name": "christian rock", "target_name": "country music", "weight": 1.0, "year": 2008}, {"source": "8", "target": "73", "source_name": "christian rock", "target_name": "southern rock", "weight": 1.0, "year": 2008}, {"source": "8", "target": "77", "source_name": "christian rock", "target_name": "rock music", "weight": 1.0, "year": 2008}, {"source": "8", "target": "79", "source_name": "christian rock", "target_name": "popular culture", "weight": 1.0, "year": 2008}, {"source": "8", "target": "80", "source_name": "christian rock", "target_name": "folk music", "weight": 1.0, "year": 2008}, {"source": "9", "target": "10", "source_name": "compact disc", "target_name": "african american", "weight": 1.0, "year": 2008}, {"source": "9", "target": "24", "source_name": "compact disc", "target_name": "punk rock", "weight": 1.0, "year": 2008}, {"source": "9", "target": "29", "source_name": "compact disc", "target_name": "rolling stone", "weight": 1.0, "year": 2008}, {"source": "9", "target": "36", "source_name": "compact disc", "target_name": "music industry", "weight": 1.0, "year": 2008}, {"source": "9", "target": "37", "source_name": "compact disc", "target_name": "middle ages", "weight": 1.0, "year": 2008}, {"source": "9", "target": "48", "source_name": "compact disc", "target_name": "pop music", "weight": 1.0, "year": 2008}, {"source": "9", "target": "53", "source_name": "compact disc", "target_name": "popular music", "weight": 3.0, "year": 2008}, {"source": "9", "target": "74", "source_name": "compact disc", "target_name": "united states", "weight": 1.0, "year": 2008}, {"source": "9", "target": "77", "source_name": "compact disc", "target_name": "rock music", "weight": 1.0, "year": 2008}, {"source": "9", "target": "79", "source_name": "compact disc", "target_name": "popular culture", "weight": 1.0, "year": 2008}, {"source": "9", "target": "80", "source_name": "compact disc", "target_name": "folk music", "weight": 2.0, "year": 2008}, {"source": "9", "target": "89", "source_name": "compact disc", "target_name": "electronic music", "weight": 1.0, "year": 2008}, {"source": "10", "target": "15", "source_name": "african american", "target_name": "musical theatre", "weight": 1.0, "year": 2008}, {"source": "10", "target": "17", "source_name": "african american", "target_name": "civil rights", "weight": 1.0, "year": 2008}, {"source": "10", "target": "19", "source_name": "african american", "target_name": "music video", "weight": 1.0, "year": 2008}, {"source": "10", "target": "22", "source_name": "african american", "target_name": "chamber music", "weight": 1.0, "year": 2008}, {"source": "10", "target": "24", "source_name": "african american", "target_name": "punk rock", "weight": 1.0, "year": 2008}, {"source": "10", "target": "36", "source_name": "african american", "target_name": "music industry", "weight": 1.0, "year": 2008}, {"source": "10", "target": "38", "source_name": "african american", "target_name": "summary additional listening", "weight": 1.0, "year": 2008}, {"source": "10", "target": "40", "source_name": "african american", "target_name": "musical instruments", "weight": 1.0, "year": 2008}, {"source": "10", "target": "52", "source_name": "african american", "target_name": "folk song", "weight": 1.0, "year": 2008}, {"source": "10", "target": "53", "source_name": "african american", "target_name": "popular music", "weight": 5.0, "year": 2008}, {"source": "10", "target": "54", "source_name": "african american", "target_name": "american popular music", "weight": 1.0, "year": 2008}, {"source": "10", "target": "65", "source_name": "african american", "target_name": "country music", "weight": 1.0, "year": 2008}, {"source": "10", "target": "69", "source_name": "african american", "target_name": "classical music", "weight": 1.0, "year": 2008}, {"source": "10", "target": "74", "source_name": "african american", "target_name": "united states", "weight": 3.0, "year": 2008}, {"source": "10", "target": "78", "source_name": "african american", "target_name": "hip hop", "weight": 1.0, "year": 2008}, {"source": "10", "target": "79", "source_name": "african american", "target_name": "popular culture", "weight": 2.0, "year": 2008}, {"source": "10", "target": "80", "source_name": "african american", "target_name": "folk music", "weight": 2.0, "year": 2008}, {"source": "10", "target": "89", "source_name": "african american", "target_name": "electronic music", "weight": 1.0, "year": 2008}, {"source": "11", "target": "23", "source_name": "south africa", "target_name": "electronic dance music", "weight": 1.0, "year": 2008}, {"source": "11", "target": "36", "source_name": "south africa", "target_name": "music industry", "weight": 1.0, "year": 2008}, {"source": "11", "target": "53", "source_name": "south africa", "target_name": "popular music", "weight": 1.0, "year": 2008}, {"source": "11", "target": "74", "source_name": "south africa", "target_name": "united states", "weight": 2.0, "year": 2008}, {"source": "11", "target": "88", "source_name": "south africa", "target_name": "oxford university press", "weight": 1.0, "year": 2008}, {"source": "12", "target": "15", "source_name": "rock opera", "target_name": "musical theatre", "weight": 3.0, "year": 2008}, {"source": "12", "target": "33", "source_name": "rock opera", "target_name": "jesus christ", "weight": 1.0, "year": 2008}, {"source": "12", "target": "53", "source_name": "rock opera", "target_name": "popular music", "weight": 1.0, "year": 2008}, {"source": "12", "target": "57", "source_name": "rock opera", "target_name": "north america", "weight": 1.0, "year": 2008}, {"source": "12", "target": "77", "source_name": "rock opera", "target_name": "rock music", "weight": 1.0, "year": 2008}, {"source": "12", "target": "79", "source_name": "rock opera", "target_name": "popular culture", "weight": 1.0, "year": 2008}, {"source": "15", "target": "33", "source_name": "musical theatre", "target_name": "jesus christ", "weight": 2.0, "year": 2008}, {"source": "15", "target": "53", "source_name": "musical theatre", "target_name": "popular music", "weight": 1.0, "year": 2008}, {"source": "15", "target": "70", "source_name": "musical theatre", "target_name": "world war", "weight": 1.0, "year": 2008}, {"source": "15", "target": "74", "source_name": "musical theatre", "target_name": "united states", "weight": 1.0, "year": 2008}, {"source": "15", "target": "77", "source_name": "musical theatre", "target_name": "rock music", "weight": 3.0, "year": 2008}, {"source": "15", "target": "87", "source_name": "musical theatre", "target_name": "music hall", "weight": 1.0, "year": 2008}, {"source": "16", "target": "29", "source_name": "bob dylan", "target_name": "rolling stone", "weight": 1.0, "year": 2008}, {"source": "16", "target": "30", "source_name": "bob dylan", "target_name": "rock band", "weight": 2.0, "year": 2008}, {"source": "16", "target": "36", "source_name": "bob dylan", "target_name": "music industry", "weight": 1.0, "year": 2008}, {"source": "16", "target": "42", "source_name": "bob dylan", "target_name": "simon frith", "weight": 1.0, "year": 2008}, {"source": "16", "target": "48", "source_name": "bob dylan", "target_name": "pop music", "weight": 2.0, "year": 2008}, {"source": "16", "target": "52", "source_name": "bob dylan", "target_name": "folk song", "weight": 1.0, "year": 2008}, {"source": "16", "target": "53", "source_name": "bob dylan", "target_name": "popular music", "weight": 7.0, "year": 2008}, {"source": "16", "target": "69", "source_name": "bob dylan", "target_name": "classical music", "weight": 1.0, "year": 2008}, {"source": "16", "target": "72", "source_name": "bob dylan", "target_name": "jimi hendrix", "weight": 2.0, "year": 2008}, {"source": "16", "target": "77", "source_name": "bob dylan", "target_name": "rock music", "weight": 5.0, "year": 2008}, {"source": "16", "target": "80", "source_name": "bob dylan", "target_name": "folk music", "weight": 4.0, "year": 2008}, {"source": "17", "target": "30", "source_name": "civil rights", "target_name": "rock band", "weight": 1.0, "year": 2008}, {"source": "17", "target": "41", "source_name": "civil rights", "target_name": "youth culture", "weight": 1.0, "year": 2008}, {"source": "17", "target": "53", "source_name": "civil rights", "target_name": "popular music", "weight": 2.0, "year": 2008}, {"source": "17", "target": "73", "source_name": "civil rights", "target_name": "southern rock", "weight": 1.0, "year": 2008}, {"source": "17", "target": "74", "source_name": "civil rights", "target_name": "united states", "weight": 1.0, "year": 2008}, {"source": "17", "target": "75", "source_name": "civil rights", "target_name": "world war ii", "weight": 1.0, "year": 2008}, {"source": "17", "target": "77", "source_name": "civil rights", "target_name": "rock music", "weight": 1.0, "year": 2008}, {"source": "17", "target": "79", "source_name": "civil rights", "target_name": "popular culture", "weight": 1.0, "year": 2008}, {"source": "19", "target": "22", "source_name": "music video", "target_name": "chamber music", "weight": 1.0, "year": 2008}, {"source": "19", "target": "30", "source_name": "music video", "target_name": "rock band", "weight": 1.0, "year": 2008}, {"source": "19", "target": "36", "source_name": "music video", "target_name": "music industry", "weight": 2.0, "year": 2008}, {"source": "19", "target": "38", "source_name": "music video", "target_name": "summary additional listening", "weight": 1.0, "year": 2008}, {"source": "19", "target": "40", "source_name": "music video", "target_name": "musical instruments", "weight": 1.0, "year": 2008}, {"source": "19", "target": "47", "source_name": "music video", "target_name": "hard rock", "weight": 1.0, "year": 2008}, {"source": "19", "target": "48", "source_name": "music video", "target_name": "pop music", "weight": 3.0, "year": 2008}, {"source": "19", "target": "49", "source_name": "music video", "target_name": "music theory", "weight": 1.0, "year": 2008}, {"source": "19", "target": "51", "source_name": "music video", "target_name": "cultural identity", "weight": 1.0, "year": 2008}, {"source": "19", "target": "52", "source_name": "music video", "target_name": "folk song", "weight": 1.0, "year": 2008}, {"source": "19", "target": "53", "source_name": "music video", "target_name": "popular music", "weight": 4.0, "year": 2008}, {"source": "19", "target": "54", "source_name": "music video", "target_name": "american popular music", "weight": 1.0, "year": 2008}, {"source": "19", "target": "65", "source_name": "music video", "target_name": "country music", "weight": 3.0, "year": 2008}, {"source": "19", "target": "69", "source_name": "music video", "target_name": "classical music", "weight": 1.0, "year": 2008}, {"source": "19", "target": "72", "source_name": "music video", "target_name": "jimi hendrix", "weight": 1.0, "year": 2008}, {"source": "19", "target": "74", "source_name": "music video", "target_name": "united states", "weight": 2.0, "year": 2008}, {"source": "19", "target": "76", "source_name": "music video", "target_name": "los angeles", "weight": 1.0, "year": 2008}, {"source": "19", "target": "77", "source_name": "music video", "target_name": "rock music", "weight": 7.0, "year": 2008}, {"source": "19", "target": "78", "source_name": "music video", "target_name": "hip hop", "weight": 1.0, "year": 2008}, {"source": "19", "target": "80", "source_name": "music video", "target_name": "folk music", "weight": 1.0, "year": 2008}, {"source": "19", "target": "82", "source_name": "music video", "target_name": "heavy metal", "weight": 1.0, "year": 2008}, {"source": "19", "target": "89", "source_name": "music video", "target_name": "electronic music", "weight": 1.0, "year": 2008}, {"source": "20", "target": "29", "source_name": "garage rock", "target_name": "rolling stone", "weight": 1.0, "year": 2008}, {"source": "20", "target": "30", "source_name": "garage rock", "target_name": "rock band", "weight": 2.0, "year": 2008}, {"source": "20", "target": "43", "source_name": "garage rock", "target_name": "music education", "weight": 1.0, "year": 2008}, {"source": "20", "target": "44", "source_name": "garage rock", "target_name": "alternative rock", "weight": 1.0, "year": 2008}, {"source": "20", "target": "48", "source_name": "garage rock", "target_name": "pop music", "weight": 1.0, "year": 2008}, {"source": "20", "target": "53", "source_name": "garage rock", "target_name": "popular music", "weight": 3.0, "year": 2008}, {"source": "20", "target": "57", "source_name": "garage rock", "target_name": "north america", "weight": 1.0, "year": 2008}, {"source": "20", "target": "65", "source_name": "garage rock", "target_name": "country music", "weight": 1.0, "year": 2008}, {"source": "20", "target": "73", "source_name": "garage rock", "target_name": "southern rock", "weight": 1.0, "year": 2008}, {"source": "20", "target": "77", "source_name": "garage rock", "target_name": "rock music", "weight": 2.0, "year": 2008}, {"source": "20", "target": "80", "source_name": "garage rock", "target_name": "folk music", "weight": 1.0, "year": 2008}, {"source": "21", "target": "47", "source_name": "social protest", "target_name": "hard rock", "weight": 1.0, "year": 2008}, {"source": "21", "target": "48", "source_name": "social protest", "target_name": "pop music", "weight": 1.0, "year": 2008}, {"source": "21", "target": "53", "source_name": "social protest", "target_name": "popular music", "weight": 2.0, "year": 2008}, {"source": "21", "target": "57", "source_name": "social protest", "target_name": "north america", "weight": 2.0, "year": 2008}, {"source": "21", "target": "71", "source_name": "social protest", "target_name": "latin american", "weight": 1.0, "year": 2008}, {"source": "21", "target": "74", "source_name": "social protest", "target_name": "united states", "weight": 1.0, "year": 2008}, {"source": "21", "target": "77", "source_name": "social protest", "target_name": "rock music", "weight": 1.0, "year": 2008}, {"source": "21", "target": "82", "source_name": "social protest", "target_name": "heavy metal", "weight": 1.0, "year": 2008}, {"source": "22", "target": "35", "source_name": "chamber music", "target_name": "ancient greek", "weight": 1.0, "year": 2008}, {"source": "22", "target": "36", "source_name": "chamber music", "target_name": "music industry", "weight": 1.0, "year": 2008}, {"source": "22", "target": "38", "source_name": "chamber music", "target_name": "summary additional listening", "weight": 1.0, "year": 2008}, {"source": "22", "target": "40", "source_name": "chamber music", "target_name": "musical instruments", "weight": 1.0, "year": 2008}, {"source": "22", "target": "52", "source_name": "chamber music", "target_name": "folk song", "weight": 1.0, "year": 2008}, {"source": "22", "target": "53", "source_name": "chamber music", "target_name": "popular music", "weight": 1.0, "year": 2008}, {"source": "22", "target": "54", "source_name": "chamber music", "target_name": "american popular music", "weight": 1.0, "year": 2008}, {"source": "22", "target": "65", "source_name": "chamber music", "target_name": "country music", "weight": 2.0, "year": 2008}, {"source": "22", "target": "69", "source_name": "chamber music", "target_name": "classical music", "weight": 2.0, "year": 2008}, {"source": "22", "target": "74", "source_name": "chamber music", "target_name": "united states", "weight": 1.0, "year": 2008}, {"source": "22", "target": "77", "source_name": "chamber music", "target_name": "rock music", "weight": 1.0, "year": 2008}, {"source": "22", "target": "80", "source_name": "chamber music", "target_name": "folk music", "weight": 2.0, "year": 2008}, {"source": "22", "target": "89", "source_name": "chamber music", "target_name": "electronic music", "weight": 3.0, "year": 2008}, {"source": "23", "target": "36", "source_name": "electronic dance music", "target_name": "music industry", "weight": 1.0, "year": 2008}, {"source": "23", "target": "42", "source_name": "electronic dance music", "target_name": "simon frith", "weight": 2.0, "year": 2008}, {"source": "23", "target": "47", "source_name": "electronic dance music", "target_name": "hard rock", "weight": 1.0, "year": 2008}, {"source": "23", "target": "53", "source_name": "electronic dance music", "target_name": "popular music", "weight": 3.0, "year": 2008}, {"source": "23", "target": "56", "source_name": "electronic dance music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2008}, {"source": "23", "target": "60", "source_name": "electronic dance music", "target_name": "cultural studies", "weight": 1.0, "year": 2008}, {"source": "23", "target": "76", "source_name": "electronic dance music", "target_name": "los angeles", "weight": 1.0, "year": 2008}, {"source": "23", "target": "78", "source_name": "electronic dance music", "target_name": "hip hop", "weight": 1.0, "year": 2008}, {"source": "23", "target": "79", "source_name": "electronic dance music", "target_name": "popular culture", "weight": 1.0, "year": 2008}, {"source": "23", "target": "82", "source_name": "electronic dance music", "target_name": "heavy metal", "weight": 1.0, "year": 2008}, {"source": "24", "target": "36", "source_name": "punk rock", "target_name": "music industry", "weight": 1.0, "year": 2008}, {"source": "24", "target": "42", "source_name": "punk rock", "target_name": "simon frith", "weight": 1.0, "year": 2008}, {"source": "24", "target": "44", "source_name": "punk rock", "target_name": "alternative rock", "weight": 1.0, "year": 2008}, {"source": "24", "target": "47", "source_name": "punk rock", "target_name": "hard rock", "weight": 1.0, "year": 2008}, {"source": "24", "target": "48", "source_name": "punk rock", "target_name": "pop music", "weight": 3.0, "year": 2008}, {"source": "24", "target": "53", "source_name": "punk rock", "target_name": "popular music", "weight": 5.0, "year": 2008}, {"source": "24", "target": "65", "source_name": "punk rock", "target_name": "country music", "weight": 1.0, "year": 2008}, {"source": "24", "target": "69", "source_name": "punk rock", "target_name": "classical music", "weight": 1.0, "year": 2008}, {"source": "24", "target": "74", "source_name": "punk rock", "target_name": "united states", "weight": 1.0, "year": 2008}, {"source": "24", "target": "77", "source_name": "punk rock", "target_name": "rock music", "weight": 5.0, "year": 2008}, {"source": "24", "target": "78", "source_name": "punk rock", "target_name": "hip hop", "weight": 1.0, "year": 2008}, {"source": "24", "target": "79", "source_name": "punk rock", "target_name": "popular culture", "weight": 1.0, "year": 2008}, {"source": "24", "target": "80", "source_name": "punk rock", "target_name": "folk music", "weight": 1.0, "year": 2008}, {"source": "24", "target": "82", "source_name": "punk rock", "target_name": "heavy metal", "weight": 2.0, "year": 2008}, {"source": "25", "target": "53", "source_name": "russian rock", "target_name": "popular music", "weight": 1.0, "year": 2008}, {"source": "25", "target": "77", "source_name": "russian rock", "target_name": "rock music", "weight": 1.0, "year": 2008}, {"source": "28", "target": "37", "source_name": "high school", "target_name": "middle ages", "weight": 1.0, "year": 2008}, {"source": "28", "target": "48", "source_name": "high school", "target_name": "pop music", "weight": 1.0, "year": 2008}, {"source": "28", "target": "77", "source_name": "high school", "target_name": "rock music", "weight": 2.0, "year": 2008}, {"source": "28", "target": "82", "source_name": "high school", "target_name": "heavy metal", "weight": 1.0, "year": 2008}, {"source": "29", "target": "36", "source_name": "rolling stone", "target_name": "music industry", "weight": 1.0, "year": 2008}, {"source": "29", "target": "42", "source_name": "rolling stone", "target_name": "simon frith", "weight": 1.0, "year": 2008}, {"source": "29", "target": "48", "source_name": "rolling stone", "target_name": "pop music", "weight": 2.0, "year": 2008}, {"source": "29", "target": "53", "source_name": "rolling stone", "target_name": "popular music", "weight": 4.0, "year": 2008}, {"source": "29", "target": "55", "source_name": "rolling stone", "target_name": "rock criticism", "weight": 2.0, "year": 2008}, {"source": "29", "target": "56", "source_name": "rolling stone", "target_name": "bruce springsteen", "weight": 1.0, "year": 2008}, {"source": "29", "target": "62", "source_name": "rolling stone", "target_name": "led zeppelin", "weight": 1.0, "year": 2008}, {"source": "29", "target": "72", "source_name": "rolling stone", "target_name": "jimi hendrix", "weight": 1.0, "year": 2008}, {"source": "29", "target": "74", "source_name": "rolling stone", "target_name": "united states", "weight": 1.0, "year": 2008}, {"source": "29", "target": "77", "source_name": "rolling stone", "target_name": "rock music", "weight": 5.0, "year": 2008}, {"source": "30", "target": "36", "source_name": "rock band", "target_name": "music industry", "weight": 1.0, "year": 2008}, {"source": "30", "target": "37", "source_name": "rock band", "target_name": "middle ages", "weight": 1.0, "year": 2008}, {"source": "30", "target": "43", "source_name": "rock band", "target_name": "music education", "weight": 1.0, "year": 2008}, {"source": "30", "target": "44", "source_name": "rock band", "target_name": "alternative rock", "weight": 1.0, "year": 2008}, {"source": "30", "target": "52", "source_name": "rock band", "target_name": "folk song", "weight": 1.0, "year": 2008}, {"source": "30", "target": "53", "source_name": "rock band", "target_name": "popular music", "weight": 10.0, "year": 2008}, {"source": "30", "target": "61", "source_name": "rock band", "target_name": "progressive rock", "weight": 5.0, "year": 2008}, {"source": "30", "target": "65", "source_name": "rock band", "target_name": "country music", "weight": 1.0, "year": 2008}, {"source": "30", "target": "69", "source_name": "rock band", "target_name": "classical music", "weight": 1.0, "year": 2008}, {"source": "30", "target": "72", "source_name": "rock band", "target_name": "jimi hendrix", "weight": 1.0, "year": 2008}, {"source": "30", "target": "73", "source_name": "rock band", "target_name": "southern rock", "weight": 2.0, "year": 2008}, {"source": "30", "target": "74", "source_name": "rock band", "target_name": "united states", "weight": 1.0, "year": 2008}, {"source": "30", "target": "76", "source_name": "rock band", "target_name": "los angeles", "weight": 1.0, "year": 2008}, {"source": "30", "target": "77", "source_name": "rock band", "target_name": "rock music", "weight": 13.0, "year": 2008}, {"source": "30", "target": "80", "source_name": "rock band", "target_name": "folk music", "weight": 2.0, "year": 2008}, {"source": "30", "target": "82", "source_name": "rock band", "target_name": "heavy metal", "weight": 1.0, "year": 2008}, {"source": "32", "target": "43", "source_name": "higher education", "target_name": "music education", "weight": 1.0, "year": 2008}, {"source": "33", "target": "53", "source_name": "jesus christ", "target_name": "popular music", "weight": 1.0, "year": 2008}, {"source": "33", "target": "70", "source_name": "jesus christ", "target_name": "world war", "weight": 1.0, "year": 2008}, {"source": "33", "target": "77", "source_name": "jesus christ", "target_name": "rock music", "weight": 2.0, "year": 2008}, {"source": "34", "target": "40", "source_name": "mass media", "target_name": "musical instruments", "weight": 1.0, "year": 2008}, {"source": "34", "target": "46", "source_name": "mass media", "target_name": "music festival", "weight": 1.0, "year": 2008}, {"source": "34", "target": "48", "source_name": "mass media", "target_name": "pop music", "weight": 1.0, "year": 2008}, {"source": "34", "target": "51", "source_name": "mass media", "target_name": "cultural identity", "weight": 1.0, "year": 2008}, {"source": "34", "target": "52", "source_name": "mass media", "target_name": "folk song", "weight": 2.0, "year": 2008}, {"source": "34", "target": "53", "source_name": "mass media", "target_name": "popular music", "weight": 4.0, "year": 2008}, {"source": "34", "target": "65", "source_name": "mass media", "target_name": "country music", "weight": 1.0, "year": 2008}, {"source": "34", "target": "66", "source_name": "mass media", "target_name": "hong kong", "weight": 1.0, "year": 2008}, {"source": "34", "target": "67", "source_name": "mass media", "target_name": "rock art", "weight": 1.0, "year": 2008}, {"source": "34", "target": "69", "source_name": "mass media", "target_name": "classical music", "weight": 1.0, "year": 2008}, {"source": "34", "target": "77", "source_name": "mass media", "target_name": "rock music", "weight": 3.0, "year": 2008}, {"source": "34", "target": "79", "source_name": "mass media", "target_name": "popular culture", "weight": 1.0, "year": 2008}, {"source": "35", "target": "43", "source_name": "ancient greek", "target_name": "music education", "weight": 1.0, "year": 2008}, {"source": "35", "target": "65", "source_name": "ancient greek", "target_name": "country music", "weight": 1.0, "year": 2008}, {"source": "35", "target": "77", "source_name": "ancient greek", "target_name": "rock music", "weight": 1.0, "year": 2008}, {"source": "35", "target": "80", "source_name": "ancient greek", "target_name": "folk music", "weight": 1.0, "year": 2008}, {"source": "35", "target": "89", "source_name": "ancient greek", "target_name": "electronic music", "weight": 1.0, "year": 2008}, {"source": "36", "target": "38", "source_name": "music industry", "target_name": "summary additional listening", "weight": 1.0, "year": 2008}, {"source": "36", "target": "40", "source_name": "music industry", "target_name": "musical instruments", "weight": 1.0, "year": 2008}, {"source": "36", "target": "41", "source_name": "music industry", "target_name": "youth culture", "weight": 1.0, "year": 2008}, {"source": "36", "target": "42", "source_name": "music industry", "target_name": "simon frith", "weight": 2.0, "year": 2008}, {"source": "36", "target": "43", "source_name": "music industry", "target_name": "music education", "weight": 1.0, "year": 2008}, {"source": "36", "target": "46", "source_name": "music industry", "target_name": "music festival", "weight": 1.0, "year": 2008}, {"source": "36", "target": "47", "source_name": "music industry", "target_name": "hard rock", "weight": 3.0, "year": 2008}, {"source": "36", "target": "48", "source_name": "music industry", "target_name": "pop music", "weight": 7.0, "year": 2008}, {"source": "36", "target": "49", "source_name": "music industry", "target_name": "music theory", "weight": 1.0, "year": 2008}, {"source": "36", "target": "51", "source_name": "music industry", "target_name": "cultural identity", "weight": 1.0, "year": 2008}, {"source": "36", "target": "52", "source_name": "music industry", "target_name": "folk song", "weight": 1.0, "year": 2008}, {"source": "36", "target": "53", "source_name": "music industry", "target_name": "popular music", "weight": 22.0, "year": 2008}, {"source": "36", "target": "54", "source_name": "music industry", "target_name": "american popular music", "weight": 2.0, "year": 2008}, {"source": "36", "target": "55", "source_name": "music industry", "target_name": "rock criticism", "weight": 1.0, "year": 2008}, {"source": "36", "target": "56", "source_name": "music industry", "target_name": "bruce springsteen", "weight": 1.0, "year": 2008}, {"source": "36", "target": "61", "source_name": "music industry", "target_name": "progressive rock", "weight": 1.0, "year": 2008}, {"source": "36", "target": "65", "source_name": "music industry", "target_name": "country music", "weight": 2.0, "year": 2008}, {"source": "36", "target": "66", "source_name": "music industry", "target_name": "hong kong", "weight": 1.0, "year": 2008}, {"source": "36", "target": "67", "source_name": "music industry", "target_name": "rock art", "weight": 1.0, "year": 2008}, {"source": "36", "target": "68", "source_name": "music industry", "target_name": "hearing loss", "weight": 1.0, "year": 2008}, {"source": "36", "target": "69", "source_name": "music industry", "target_name": "classical music", "weight": 4.0, "year": 2008}, {"source": "36", "target": "70", "source_name": "music industry", "target_name": "world war", "weight": 1.0, "year": 2008}, {"source": "36", "target": "72", "source_name": "music industry", "target_name": "jimi hendrix", "weight": 3.0, "year": 2008}, {"source": "36", "target": "74", "source_name": "music industry", "target_name": "united states", "weight": 3.0, "year": 2008}, {"source": "36", "target": "75", "source_name": "music industry", "target_name": "world war ii", "weight": 1.0, "year": 2008}, {"source": "36", "target": "76", "source_name": "music industry", "target_name": "los angeles", "weight": 2.0, "year": 2008}, {"source": "36", "target": "77", "source_name": "music industry", "target_name": "rock music", "weight": 11.0, "year": 2008}, {"source": "36", "target": "78", "source_name": "music industry", "target_name": "hip hop", "weight": 5.0, "year": 2008}, {"source": "36", "target": "79", "source_name": "music industry", "target_name": "popular culture", "weight": 4.0, "year": 2008}, {"source": "36", "target": "80", "source_name": "music industry", "target_name": "folk music", "weight": 3.0, "year": 2008}, {"source": "36", "target": "82", "source_name": "music industry", "target_name": "heavy metal", "weight": 2.0, "year": 2008}, {"source": "36", "target": "83", "source_name": "music industry", "target_name": "folk rock", "weight": 1.0, "year": 2008}, {"source": "36", "target": "88", "source_name": "music industry", "target_name": "oxford university press", "weight": 1.0, "year": 2008}, {"source": "36", "target": "89", "source_name": "music industry", "target_name": "electronic music", "weight": 1.0, "year": 2008}, {"source": "37", "target": "44", "source_name": "middle ages", "target_name": "alternative rock", "weight": 1.0, "year": 2008}, {"source": "37", "target": "58", "source_name": "middle ages", "target_name": "music therapy", "weight": 1.0, "year": 2008}, {"source": "37", "target": "61", "source_name": "middle ages", "target_name": "progressive rock", "weight": 1.0, "year": 2008}, {"source": "37", "target": "69", "source_name": "middle ages", "target_name": "classical music", "weight": 1.0, "year": 2008}, {"source": "37", "target": "77", "source_name": "middle ages", "target_name": "rock music", "weight": 2.0, "year": 2008}, {"source": "37", "target": "80", "source_name": "middle ages", "target_name": "folk music", "weight": 2.0, "year": 2008}, {"source": "38", "target": "40", "source_name": "summary additional listening", "target_name": "musical instruments", "weight": 1.0, "year": 2008}, {"source": "38", "target": "52", "source_name": "summary additional listening", "target_name": "folk song", "weight": 1.0, "year": 2008}, {"source": "38", "target": "53", "source_name": "summary additional listening", "target_name": "popular music", "weight": 1.0, "year": 2008}, {"source": "38", "target": "54", "source_name": "summary additional listening", "target_name": "american popular music", "weight": 1.0, "year": 2008}, {"source": "38", "target": "65", "source_name": "summary additional listening", "target_name": "country music", "weight": 1.0, "year": 2008}, {"source": "38", "target": "69", "source_name": "summary additional listening", "target_name": "classical music", "weight": 1.0, "year": 2008}, {"source": "38", "target": "74", "source_name": "summary additional listening", "target_name": "united states", "weight": 1.0, "year": 2008}, {"source": "38", "target": "80", "source_name": "summary additional listening", "target_name": "folk music", "weight": 1.0, "year": 2008}, {"source": "38", "target": "89", "source_name": "summary additional listening", "target_name": "electronic music", "weight": 1.0, "year": 2008}, {"source": "40", "target": "43", "source_name": "musical instruments", "target_name": "music education", "weight": 1.0, "year": 2008}, {"source": "40", "target": "49", "source_name": "musical instruments", "target_name": "music theory", "weight": 1.0, "year": 2008}, {"source": "40", "target": "52", "source_name": "musical instruments", "target_name": "folk song", "weight": 1.0, "year": 2008}, {"source": "40", "target": "53", "source_name": "musical instruments", "target_name": "popular music", "weight": 2.0, "year": 2008}, {"source": "40", "target": "54", "source_name": "musical instruments", "target_name": "american popular music", "weight": 2.0, "year": 2008}, {"source": "40", "target": "65", "source_name": "musical instruments", "target_name": "country music", "weight": 1.0, "year": 2008}, {"source": "40", "target": "69", "source_name": "musical instruments", "target_name": "classical music", "weight": 1.0, "year": 2008}, {"source": "40", "target": "70", "source_name": "musical instruments", "target_name": "world war", "weight": 1.0, "year": 2008}, {"source": "40", "target": "74", "source_name": "musical instruments", "target_name": "united states", "weight": 2.0, "year": 2008}, {"source": "40", "target": "75", "source_name": "musical instruments", "target_name": "world war ii", "weight": 1.0, "year": 2008}, {"source": "40", "target": "80", "source_name": "musical instruments", "target_name": "folk music", "weight": 1.0, "year": 2008}, {"source": "40", "target": "89", "source_name": "musical instruments", "target_name": "electronic music", "weight": 2.0, "year": 2008}, {"source": "41", "target": "48", "source_name": "youth culture", "target_name": "pop music", "weight": 4.0, "year": 2008}, {"source": "41", "target": "51", "source_name": "youth culture", "target_name": "cultural identity", "weight": 2.0, "year": 2008}, {"source": "41", "target": "53", "source_name": "youth culture", "target_name": "popular music", "weight": 2.0, "year": 2008}, {"source": "41", "target": "60", "source_name": "youth culture", "target_name": "cultural studies", "weight": 2.0, "year": 2008}, {"source": "41", "target": "66", "source_name": "youth culture", "target_name": "hong kong", "weight": 1.0, "year": 2008}, {"source": "41", "target": "74", "source_name": "youth culture", "target_name": "united states", "weight": 1.0, "year": 2008}, {"source": "41", "target": "75", "source_name": "youth culture", "target_name": "world war ii", "weight": 1.0, "year": 2008}, {"source": "41", "target": "77", "source_name": "youth culture", "target_name": "rock music", "weight": 4.0, "year": 2008}, {"source": "42", "target": "47", "source_name": "simon frith", "target_name": "hard rock", "weight": 1.0, "year": 2008}, {"source": "42", "target": "48", "source_name": "simon frith", "target_name": "pop music", "weight": 6.0, "year": 2008}, {"source": "42", "target": "51", "source_name": "simon frith", "target_name": "cultural identity", "weight": 1.0, "year": 2008}, {"source": "42", "target": "53", "source_name": "simon frith", "target_name": "popular music", "weight": 4.0, "year": 2008}, {"source": "42", "target": "55", "source_name": "simon frith", "target_name": "rock criticism", "weight": 2.0, "year": 2008}, {"source": "42", "target": "56", "source_name": "simon frith", "target_name": "bruce springsteen", "weight": 1.0, "year": 2008}, {"source": "42", "target": "57", "source_name": "simon frith", "target_name": "north america", "weight": 1.0, "year": 2008}, {"source": "42", "target": "60", "source_name": "simon frith", "target_name": "cultural studies", "weight": 1.0, "year": 2008}, {"source": "42", "target": "65", "source_name": "simon frith", "target_name": "country music", "weight": 1.0, "year": 2008}, {"source": "42", "target": "72", "source_name": "simon frith", "target_name": "jimi hendrix", "weight": 1.0, "year": 2008}, {"source": "42", "target": "76", "source_name": "simon frith", "target_name": "los angeles", "weight": 1.0, "year": 2008}, {"source": "42", "target": "77", "source_name": "simon frith", "target_name": "rock music", "weight": 2.0, "year": 2008}, {"source": "42", "target": "78", "source_name": "simon frith", "target_name": "hip hop", "weight": 1.0, "year": 2008}, {"source": "42", "target": "79", "source_name": "simon frith", "target_name": "popular culture", "weight": 1.0, "year": 2008}, {"source": "42", "target": "82", "source_name": "simon frith", "target_name": "heavy metal", "weight": 1.0, "year": 2008}, {"source": "43", "target": "49", "source_name": "music education", "target_name": "music theory", "weight": 2.0, "year": 2008}, {"source": "43", "target": "53", "source_name": "music education", "target_name": "popular music", "weight": 4.0, "year": 2008}, {"source": "43", "target": "57", "source_name": "music education", "target_name": "north america", "weight": 1.0, "year": 2008}, {"source": "43", "target": "60", "source_name": "music education", "target_name": "cultural studies", "weight": 1.0, "year": 2008}, {"source": "43", "target": "69", "source_name": "music education", "target_name": "classical music", "weight": 2.0, "year": 2008}, {"source": "43", "target": "74", "source_name": "music education", "target_name": "united states", "weight": 1.0, "year": 2008}, {"source": "43", "target": "77", "source_name": "music education", "target_name": "rock music", "weight": 2.0, "year": 2008}, {"source": "43", "target": "80", "source_name": "music education", "target_name": "folk music", "weight": 3.0, "year": 2008}, {"source": "44", "target": "48", "source_name": "alternative rock", "target_name": "pop music", "weight": 1.0, "year": 2008}, {"source": "44", "target": "53", "source_name": "alternative rock", "target_name": "popular music", "weight": 7.0, "year": 2008}, {"source": "44", "target": "57", "source_name": "alternative rock", "target_name": "north america", "weight": 3.0, "year": 2008}, {"source": "44", "target": "61", "source_name": "alternative rock", "target_name": "progressive rock", "weight": 1.0, "year": 2008}, {"source": "44", "target": "65", "source_name": "alternative rock", "target_name": "country music", "weight": 2.0, "year": 2008}, {"source": "44", "target": "67", "source_name": "alternative rock", "target_name": "rock art", "weight": 1.0, "year": 2008}, {"source": "44", "target": "73", "source_name": "alternative rock", "target_name": "southern rock", "weight": 1.0, "year": 2008}, {"source": "44", "target": "74", "source_name": "alternative rock", "target_name": "united states", "weight": 2.0, "year": 2008}, {"source": "44", "target": "77", "source_name": "alternative rock", "target_name": "rock music", "weight": 5.0, "year": 2008}, {"source": "44", "target": "78", "source_name": "alternative rock", "target_name": "hip hop", "weight": 1.0, "year": 2008}, {"source": "44", "target": "80", "source_name": "alternative rock", "target_name": "folk music", "weight": 1.0, "year": 2008}, {"source": "46", "target": "48", "source_name": "music festival", "target_name": "pop music", "weight": 2.0, "year": 2008}, {"source": "46", "target": "77", "source_name": "music festival", "target_name": "rock music", "weight": 1.0, "year": 2008}, {"source": "46", "target": "80", "source_name": "music festival", "target_name": "folk music", "weight": 1.0, "year": 2008}, {"source": "47", "target": "48", "source_name": "hard rock", "target_name": "pop music", "weight": 1.0, "year": 2008}, {"source": "47", "target": "53", "source_name": "hard rock", "target_name": "popular music", "weight": 4.0, "year": 2008}, {"source": "47", "target": "56", "source_name": "hard rock", "target_name": "bruce springsteen", "weight": 1.0, "year": 2008}, {"source": "47", "target": "57", "source_name": "hard rock", "target_name": "north america", "weight": 1.0, "year": 2008}, {"source": "47", "target": "65", "source_name": "hard rock", "target_name": "country music", "weight": 1.0, "year": 2008}, {"source": "47", "target": "69", "source_name": "hard rock", "target_name": "classical music", "weight": 2.0, "year": 2008}, {"source": "47", "target": "77", "source_name": "hard rock", "target_name": "rock music", "weight": 8.0, "year": 2008}, {"source": "47", "target": "78", "source_name": "hard rock", "target_name": "hip hop", "weight": 1.0, "year": 2008}, {"source": "47", "target": "79", "source_name": "hard rock", "target_name": "popular culture", "weight": 2.0, "year": 2008}, {"source": "47", "target": "82", "source_name": "hard rock", "target_name": "heavy metal", "weight": 3.0, "year": 2008}, {"source": "47", "target": "89", "source_name": "hard rock", "target_name": "electronic music", "weight": 1.0, "year": 2008}, {"source": "48", "target": "51", "source_name": "pop music", "target_name": "cultural identity", "weight": 3.0, "year": 2008}, {"source": "48", "target": "52", "source_name": "pop music", "target_name": "folk song", "weight": 1.0, "year": 2008}, {"source": "48", "target": "53", "source_name": "pop music", "target_name": "popular music", "weight": 19.0, "year": 2008}, {"source": "48", "target": "55", "source_name": "pop music", "target_name": "rock criticism", "weight": 2.0, "year": 2008}, {"source": "48", "target": "57", "source_name": "pop music", "target_name": "north america", "weight": 2.0, "year": 2008}, {"source": "48", "target": "60", "source_name": "pop music", "target_name": "cultural studies", "weight": 1.0, "year": 2008}, {"source": "48", "target": "64", "source_name": "pop music", "target_name": "english language", "weight": 1.0, "year": 2008}, {"source": "48", "target": "65", "source_name": "pop music", "target_name": "country music", "weight": 1.0, "year": 2008}, {"source": "48", "target": "66", "source_name": "pop music", "target_name": "hong kong", "weight": 2.0, "year": 2008}, {"source": "48", "target": "67", "source_name": "pop music", "target_name": "rock art", "weight": 1.0, "year": 2008}, {"source": "48", "target": "69", "source_name": "pop music", "target_name": "classical music", "weight": 1.0, "year": 2008}, {"source": "48", "target": "70", "source_name": "pop music", "target_name": "world war", "weight": 2.0, "year": 2008}, {"source": "48", "target": "71", "source_name": "pop music", "target_name": "latin american", "weight": 1.0, "year": 2008}, {"source": "48", "target": "72", "source_name": "pop music", "target_name": "jimi hendrix", "weight": 2.0, "year": 2008}, {"source": "48", "target": "74", "source_name": "pop music", "target_name": "united states", "weight": 4.0, "year": 2008}, {"source": "48", "target": "77", "source_name": "pop music", "target_name": "rock music", "weight": 19.0, "year": 2008}, {"source": "48", "target": "78", "source_name": "pop music", "target_name": "hip hop", "weight": 1.0, "year": 2008}, {"source": "48", "target": "79", "source_name": "pop music", "target_name": "popular culture", "weight": 2.0, "year": 2008}, {"source": "48", "target": "80", "source_name": "pop music", "target_name": "folk music", "weight": 2.0, "year": 2008}, {"source": "48", "target": "82", "source_name": "pop music", "target_name": "heavy metal", "weight": 1.0, "year": 2008}, {"source": "48", "target": "83", "source_name": "pop music", "target_name": "folk rock", "weight": 1.0, "year": 2008}, {"source": "49", "target": "53", "source_name": "music theory", "target_name": "popular music", "weight": 4.0, "year": 2008}, {"source": "49", "target": "54", "source_name": "music theory", "target_name": "american popular music", "weight": 1.0, "year": 2008}, {"source": "49", "target": "55", "source_name": "music theory", "target_name": "rock criticism", "weight": 1.0, "year": 2008}, {"source": "49", "target": "57", "source_name": "music theory", "target_name": "north america", "weight": 2.0, "year": 2008}, {"source": "49", "target": "69", "source_name": "music theory", "target_name": "classical music", "weight": 1.0, "year": 2008}, {"source": "49", "target": "72", "source_name": "music theory", "target_name": "jimi hendrix", "weight": 1.0, "year": 2008}, {"source": "49", "target": "77", "source_name": "music theory", "target_name": "rock music", "weight": 2.0, "year": 2008}, {"source": "49", "target": "78", "source_name": "music theory", "target_name": "hip hop", "weight": 1.0, "year": 2008}, {"source": "49", "target": "88", "source_name": "music theory", "target_name": "oxford university press", "weight": 1.0, "year": 2008}, {"source": "49", "target": "89", "source_name": "music theory", "target_name": "electronic music", "weight": 1.0, "year": 2008}, {"source": "50", "target": "53", "source_name": "hollywood film", "target_name": "popular music", "weight": 1.0, "year": 2008}, {"source": "50", "target": "79", "source_name": "hollywood film", "target_name": "popular culture", "weight": 1.0, "year": 2008}, {"source": "51", "target": "52", "source_name": "cultural identity", "target_name": "folk song", "weight": 1.0, "year": 2008}, {"source": "51", "target": "53", "source_name": "cultural identity", "target_name": "popular music", "weight": 2.0, "year": 2008}, {"source": "51", "target": "60", "source_name": "cultural identity", "target_name": "cultural studies", "weight": 2.0, "year": 2008}, {"source": "51", "target": "65", "source_name": "cultural identity", "target_name": "country music", "weight": 1.0, "year": 2008}, {"source": "51", "target": "66", "source_name": "cultural identity", "target_name": "hong kong", "weight": 1.0, "year": 2008}, {"source": "51", "target": "72", "source_name": "cultural identity", "target_name": "jimi hendrix", "weight": 2.0, "year": 2008}, {"source": "51", "target": "74", "source_name": "cultural identity", "target_name": "united states", "weight": 2.0, "year": 2008}, {"source": "51", "target": "77", "source_name": "cultural identity", "target_name": "rock music", "weight": 6.0, "year": 2008}, {"source": "51", "target": "79", "source_name": "cultural identity", "target_name": "popular culture", "weight": 2.0, "year": 2008}, {"source": "52", "target": "53", "source_name": "folk song", "target_name": "popular music", "weight": 6.0, "year": 2008}, {"source": "52", "target": "54", "source_name": "folk song", "target_name": "american popular music", "weight": 1.0, "year": 2008}, {"source": "52", "target": "65", "source_name": "folk song", "target_name": "country music", "weight": 1.0, "year": 2008}, {"source": "52", "target": "66", "source_name": "folk song", "target_name": "hong kong", "weight": 1.0, "year": 2008}, {"source": "52", "target": "69", "source_name": "folk song", "target_name": "classical music", "weight": 2.0, "year": 2008}, {"source": "52", "target": "74", "source_name": "folk song", "target_name": "united states", "weight": 1.0, "year": 2008}, {"source": "52", "target": "77", "source_name": "folk song", "target_name": "rock music", "weight": 3.0, "year": 2008}, {"source": "52", "target": "80", "source_name": "folk song", "target_name": "folk music", "weight": 4.0, "year": 2008}, {"source": "52", "target": "87", "source_name": "folk song", "target_name": "music hall", "weight": 1.0, "year": 2008}, {"source": "52", "target": "89", "source_name": "folk song", "target_name": "electronic music", "weight": 1.0, "year": 2008}, {"source": "53", "target": "54", "source_name": "popular music", "target_name": "american popular music", "weight": 8.0, "year": 2008}, {"source": "53", "target": "55", "source_name": "popular music", "target_name": "rock criticism", "weight": 3.0, "year": 2008}, {"source": "53", "target": "56", "source_name": "popular music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2008}, {"source": "53", "target": "57", "source_name": "popular music", "target_name": "north america", "weight": 6.0, "year": 2008}, {"source": "53", "target": "58", "source_name": "popular music", "target_name": "music therapy", "weight": 1.0, "year": 2008}, {"source": "53", "target": "59", "source_name": "popular music", "target_name": "college students", "weight": 3.0, "year": 2008}, {"source": "53", "target": "60", "source_name": "popular music", "target_name": "cultural studies", "weight": 5.0, "year": 2008}, {"source": "53", "target": "61", "source_name": "popular music", "target_name": "progressive rock", "weight": 5.0, "year": 2008}, {"source": "53", "target": "62", "source_name": "popular music", "target_name": "led zeppelin", "weight": 2.0, "year": 2008}, {"source": "53", "target": "65", "source_name": "popular music", "target_name": "country music", "weight": 9.0, "year": 2008}, {"source": "53", "target": "66", "source_name": "popular music", "target_name": "hong kong", "weight": 2.0, "year": 2008}, {"source": "53", "target": "67", "source_name": "popular music", "target_name": "rock art", "weight": 2.0, "year": 2008}, {"source": "53", "target": "69", "source_name": "popular music", "target_name": "classical music", "weight": 9.0, "year": 2008}, {"source": "53", "target": "70", "source_name": "popular music", "target_name": "world war", "weight": 5.0, "year": 2008}, {"source": "53", "target": "71", "source_name": "popular music", "target_name": "latin american", "weight": 2.0, "year": 2008}, {"source": "53", "target": "72", "source_name": "popular music", "target_name": "jimi hendrix", "weight": 4.0, "year": 2008}, {"source": "53", "target": "73", "source_name": "popular music", "target_name": "southern rock", "weight": 2.0, "year": 2008}, {"source": "53", "target": "74", "source_name": "popular music", "target_name": "united states", "weight": 12.0, "year": 2008}, {"source": "53", "target": "75", "source_name": "popular music", "target_name": "world war ii", "weight": 3.0, "year": 2008}, {"source": "53", "target": "76", "source_name": "popular music", "target_name": "los angeles", "weight": 5.0, "year": 2008}, {"source": "53", "target": "77", "source_name": "popular music", "target_name": "rock music", "weight": 74.0, "year": 2008}, {"source": "53", "target": "78", "source_name": "popular music", "target_name": "hip hop", "weight": 8.0, "year": 2008}, {"source": "53", "target": "79", "source_name": "popular music", "target_name": "popular culture", "weight": 13.0, "year": 2008}, {"source": "53", "target": "80", "source_name": "popular music", "target_name": "folk music", "weight": 12.0, "year": 2008}, {"source": "53", "target": "82", "source_name": "popular music", "target_name": "heavy metal", "weight": 8.0, "year": 2008}, {"source": "53", "target": "83", "source_name": "popular music", "target_name": "folk rock", "weight": 1.0, "year": 2008}, {"source": "53", "target": "85", "source_name": "popular music", "target_name": "jewish music", "weight": 1.0, "year": 2008}, {"source": "53", "target": "87", "source_name": "popular music", "target_name": "music hall", "weight": 2.0, "year": 2008}, {"source": "53", "target": "88", "source_name": "popular music", "target_name": "oxford university press", "weight": 3.0, "year": 2008}, {"source": "53", "target": "89", "source_name": "popular music", "target_name": "electronic music", "weight": 3.0, "year": 2008}, {"source": "54", "target": "55", "source_name": "american popular music", "target_name": "rock criticism", "weight": 1.0, "year": 2008}, {"source": "54", "target": "65", "source_name": "american popular music", "target_name": "country music", "weight": 3.0, "year": 2008}, {"source": "54", "target": "69", "source_name": "american popular music", "target_name": "classical music", "weight": 3.0, "year": 2008}, {"source": "54", "target": "71", "source_name": "american popular music", "target_name": "latin american", "weight": 1.0, "year": 2008}, {"source": "54", "target": "74", "source_name": "american popular music", "target_name": "united states", "weight": 3.0, "year": 2008}, {"source": "54", "target": "76", "source_name": "american popular music", "target_name": "los angeles", "weight": 1.0, "year": 2008}, {"source": "54", "target": "77", "source_name": "american popular music", "target_name": "rock music", "weight": 1.0, "year": 2008}, {"source": "54", "target": "78", "source_name": "american popular music", "target_name": "hip hop", "weight": 1.0, "year": 2008}, {"source": "54", "target": "79", "source_name": "american popular music", "target_name": "popular culture", "weight": 1.0, "year": 2008}, {"source": "54", "target": "80", "source_name": "american popular music", "target_name": "folk music", "weight": 1.0, "year": 2008}, {"source": "54", "target": "88", "source_name": "american popular music", "target_name": "oxford university press", "weight": 1.0, "year": 2008}, {"source": "54", "target": "89", "source_name": "american popular music", "target_name": "electronic music", "weight": 1.0, "year": 2008}, {"source": "55", "target": "57", "source_name": "rock criticism", "target_name": "north america", "weight": 1.0, "year": 2008}, {"source": "55", "target": "61", "source_name": "rock criticism", "target_name": "progressive rock", "weight": 2.0, "year": 2008}, {"source": "55", "target": "65", "source_name": "rock criticism", "target_name": "country music", "weight": 1.0, "year": 2008}, {"source": "55", "target": "69", "source_name": "rock criticism", "target_name": "classical music", "weight": 1.0, "year": 2008}, {"source": "55", "target": "74", "source_name": "rock criticism", "target_name": "united states", "weight": 1.0, "year": 2008}, {"source": "55", "target": "77", "source_name": "rock criticism", "target_name": "rock music", "weight": 3.0, "year": 2008}, {"source": "55", "target": "78", "source_name": "rock criticism", "target_name": "hip hop", "weight": 1.0, "year": 2008}, {"source": "55", "target": "88", "source_name": "rock criticism", "target_name": "oxford university press", "weight": 1.0, "year": 2008}, {"source": "56", "target": "72", "source_name": "bruce springsteen", "target_name": "jimi hendrix", "weight": 1.0, "year": 2008}, {"source": "56", "target": "77", "source_name": "bruce springsteen", "target_name": "rock music", "weight": 2.0, "year": 2008}, {"source": "56", "target": "78", "source_name": "bruce springsteen", "target_name": "hip hop", "weight": 1.0, "year": 2008}, {"source": "56", "target": "79", "source_name": "bruce springsteen", "target_name": "popular culture", "weight": 1.0, "year": 2008}, {"source": "56", "target": "82", "source_name": "bruce springsteen", "target_name": "heavy metal", "weight": 1.0, "year": 2008}, {"source": "57", "target": "61", "source_name": "north america", "target_name": "progressive rock", "weight": 1.0, "year": 2008}, {"source": "57", "target": "65", "source_name": "north america", "target_name": "country music", "weight": 2.0, "year": 2008}, {"source": "57", "target": "71", "source_name": "north america", "target_name": "latin american", "weight": 1.0, "year": 2008}, {"source": "57", "target": "73", "source_name": "north america", "target_name": "southern rock", "weight": 1.0, "year": 2008}, {"source": "57", "target": "74", "source_name": "north america", "target_name": "united states", "weight": 3.0, "year": 2008}, {"source": "57", "target": "77", "source_name": "north america", "target_name": "rock music", "weight": 4.0, "year": 2008}, {"source": "57", "target": "78", "source_name": "north america", "target_name": "hip hop", "weight": 1.0, "year": 2008}, {"source": "57", "target": "80", "source_name": "north america", "target_name": "folk music", "weight": 2.0, "year": 2008}, {"source": "58", "target": "64", "source_name": "music therapy", "target_name": "english language", "weight": 1.0, "year": 2008}, {"source": "58", "target": "77", "source_name": "music therapy", "target_name": "rock music", "weight": 3.0, "year": 2008}, {"source": "59", "target": "74", "source_name": "college students", "target_name": "united states", "weight": 1.0, "year": 2008}, {"source": "59", "target": "77", "source_name": "college students", "target_name": "rock music", "weight": 1.0, "year": 2008}, {"source": "59", "target": "82", "source_name": "college students", "target_name": "heavy metal", "weight": 1.0, "year": 2008}, {"source": "60", "target": "62", "source_name": "cultural studies", "target_name": "led zeppelin", "weight": 1.0, "year": 2008}, {"source": "60", "target": "71", "source_name": "cultural studies", "target_name": "latin american", "weight": 1.0, "year": 2008}, {"source": "60", "target": "76", "source_name": "cultural studies", "target_name": "los angeles", "weight": 1.0, "year": 2008}, {"source": "60", "target": "77", "source_name": "cultural studies", "target_name": "rock music", "weight": 5.0, "year": 2008}, {"source": "60", "target": "79", "source_name": "cultural studies", "target_name": "popular culture", "weight": 4.0, "year": 2008}, {"source": "60", "target": "80", "source_name": "cultural studies", "target_name": "folk music", "weight": 1.0, "year": 2008}, {"source": "60", "target": "85", "source_name": "cultural studies", "target_name": "jewish music", "weight": 1.0, "year": 2008}, {"source": "60", "target": "87", "source_name": "cultural studies", "target_name": "music hall", "weight": 1.0, "year": 2008}, {"source": "60", "target": "88", "source_name": "cultural studies", "target_name": "oxford university press", "weight": 2.0, "year": 2008}, {"source": "61", "target": "69", "source_name": "progressive rock", "target_name": "classical music", "weight": 2.0, "year": 2008}, {"source": "61", "target": "72", "source_name": "progressive rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2008}, {"source": "61", "target": "74", "source_name": "progressive rock", "target_name": "united states", "weight": 1.0, "year": 2008}, {"source": "61", "target": "77", "source_name": "progressive rock", "target_name": "rock music", "weight": 13.0, "year": 2008}, {"source": "61", "target": "80", "source_name": "progressive rock", "target_name": "folk music", "weight": 1.0, "year": 2008}, {"source": "61", "target": "82", "source_name": "progressive rock", "target_name": "heavy metal", "weight": 1.0, "year": 2008}, {"source": "61", "target": "89", "source_name": "progressive rock", "target_name": "electronic music", "weight": 1.0, "year": 2008}, {"source": "62", "target": "77", "source_name": "led zeppelin", "target_name": "rock music", "weight": 1.0, "year": 2008}, {"source": "62", "target": "88", "source_name": "led zeppelin", "target_name": "oxford university press", "weight": 1.0, "year": 2008}, {"source": "64", "target": "70", "source_name": "english language", "target_name": "world war", "weight": 1.0, "year": 2008}, {"source": "64", "target": "74", "source_name": "english language", "target_name": "united states", "weight": 1.0, "year": 2008}, {"source": "64", "target": "77", "source_name": "english language", "target_name": "rock music", "weight": 2.0, "year": 2008}, {"source": "64", "target": "79", "source_name": "english language", "target_name": "popular culture", "weight": 1.0, "year": 2008}, {"source": "65", "target": "69", "source_name": "country music", "target_name": "classical music", "weight": 3.0, "year": 2008}, {"source": "65", "target": "72", "source_name": "country music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2008}, {"source": "65", "target": "73", "source_name": "country music", "target_name": "southern rock", "weight": 2.0, "year": 2008}, {"source": "65", "target": "74", "source_name": "country music", "target_name": "united states", "weight": 2.0, "year": 2008}, {"source": "65", "target": "77", "source_name": "country music", "target_name": "rock music", "weight": 4.0, "year": 2008}, {"source": "65", "target": "79", "source_name": "country music", "target_name": "popular culture", "weight": 2.0, "year": 2008}, {"source": "65", "target": "80", "source_name": "country music", "target_name": "folk music", "weight": 3.0, "year": 2008}, {"source": "65", "target": "82", "source_name": "country music", "target_name": "heavy metal", "weight": 1.0, "year": 2008}, {"source": "65", "target": "89", "source_name": "country music", "target_name": "electronic music", "weight": 2.0, "year": 2008}, {"source": "66", "target": "77", "source_name": "hong kong", "target_name": "rock music", "weight": 2.0, "year": 2008}, {"source": "67", "target": "77", "source_name": "rock art", "target_name": "rock music", "weight": 3.0, "year": 2008}, {"source": "67", "target": "79", "source_name": "rock art", "target_name": "popular culture", "weight": 1.0, "year": 2008}, {"source": "68", "target": "77", "source_name": "hearing loss", "target_name": "rock music", "weight": 3.0, "year": 2008}, {"source": "69", "target": "71", "source_name": "classical music", "target_name": "latin american", "weight": 1.0, "year": 2008}, {"source": "69", "target": "72", "source_name": "classical music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2008}, {"source": "69", "target": "74", "source_name": "classical music", "target_name": "united states", "weight": 4.0, "year": 2008}, {"source": "69", "target": "76", "source_name": "classical music", "target_name": "los angeles", "weight": 1.0, "year": 2008}, {"source": "69", "target": "77", "source_name": "classical music", "target_name": "rock music", "weight": 19.0, "year": 2008}, {"source": "69", "target": "78", "source_name": "classical music", "target_name": "hip hop", "weight": 2.0, "year": 2008}, {"source": "69", "target": "79", "source_name": "classical music", "target_name": "popular culture", "weight": 2.0, "year": 2008}, {"source": "69", "target": "80", "source_name": "classical music", "target_name": "folk music", "weight": 3.0, "year": 2008}, {"source": "69", "target": "82", "source_name": "classical music", "target_name": "heavy metal", "weight": 3.0, "year": 2008}, {"source": "69", "target": "87", "source_name": "classical music", "target_name": "music hall", "weight": 1.0, "year": 2008}, {"source": "69", "target": "88", "source_name": "classical music", "target_name": "oxford university press", "weight": 1.0, "year": 2008}, {"source": "69", "target": "89", "source_name": "classical music", "target_name": "electronic music", "weight": 2.0, "year": 2008}, {"source": "70", "target": "74", "source_name": "world war", "target_name": "united states", "weight": 2.0, "year": 2008}, {"source": "70", "target": "75", "source_name": "world war", "target_name": "world war ii", "weight": 3.0, "year": 2008}, {"source": "70", "target": "77", "source_name": "world war", "target_name": "rock music", "weight": 5.0, "year": 2008}, {"source": "70", "target": "79", "source_name": "world war", "target_name": "popular culture", "weight": 1.0, "year": 2008}, {"source": "70", "target": "80", "source_name": "world war", "target_name": "folk music", "weight": 1.0, "year": 2008}, {"source": "70", "target": "87", "source_name": "world war", "target_name": "music hall", "weight": 1.0, "year": 2008}, {"source": "70", "target": "89", "source_name": "world war", "target_name": "electronic music", "weight": 1.0, "year": 2008}, {"source": "71", "target": "74", "source_name": "latin american", "target_name": "united states", "weight": 3.0, "year": 2008}, {"source": "71", "target": "76", "source_name": "latin american", "target_name": "los angeles", "weight": 2.0, "year": 2008}, {"source": "71", "target": "77", "source_name": "latin american", "target_name": "rock music", "weight": 4.0, "year": 2008}, {"source": "71", "target": "79", "source_name": "latin american", "target_name": "popular culture", "weight": 1.0, "year": 2008}, {"source": "72", "target": "74", "source_name": "jimi hendrix", "target_name": "united states", "weight": 1.0, "year": 2008}, {"source": "72", "target": "77", "source_name": "jimi hendrix", "target_name": "rock music", "weight": 5.0, "year": 2008}, {"source": "72", "target": "79", "source_name": "jimi hendrix", "target_name": "popular culture", "weight": 2.0, "year": 2008}, {"source": "72", "target": "80", "source_name": "jimi hendrix", "target_name": "folk music", "weight": 1.0, "year": 2008}, {"source": "72", "target": "89", "source_name": "jimi hendrix", "target_name": "electronic music", "weight": 1.0, "year": 2008}, {"source": "73", "target": "77", "source_name": "southern rock", "target_name": "rock music", "weight": 1.0, "year": 2008}, {"source": "73", "target": "80", "source_name": "southern rock", "target_name": "folk music", "weight": 1.0, "year": 2008}, {"source": "74", "target": "76", "source_name": "united states", "target_name": "los angeles", "weight": 1.0, "year": 2008}, {"source": "74", "target": "77", "source_name": "united states", "target_name": "rock music", "weight": 9.0, "year": 2008}, {"source": "74", "target": "78", "source_name": "united states", "target_name": "hip hop", "weight": 1.0, "year": 2008}, {"source": "74", "target": "79", "source_name": "united states", "target_name": "popular culture", "weight": 3.0, "year": 2008}, {"source": "74", "target": "80", "source_name": "united states", "target_name": "folk music", "weight": 3.0, "year": 2008}, {"source": "74", "target": "89", "source_name": "united states", "target_name": "electronic music", "weight": 1.0, "year": 2008}, {"source": "75", "target": "77", "source_name": "world war ii", "target_name": "rock music", "weight": 1.0, "year": 2008}, {"source": "76", "target": "77", "source_name": "los angeles", "target_name": "rock music", "weight": 5.0, "year": 2008}, {"source": "76", "target": "79", "source_name": "los angeles", "target_name": "popular culture", "weight": 1.0, "year": 2008}, {"source": "77", "target": "78", "source_name": "rock music", "target_name": "hip hop", "weight": 3.0, "year": 2008}, {"source": "77", "target": "79", "source_name": "rock music", "target_name": "popular culture", "weight": 12.0, "year": 2008}, {"source": "77", "target": "80", "source_name": "rock music", "target_name": "folk music", "weight": 8.0, "year": 2008}, {"source": "77", "target": "82", "source_name": "rock music", "target_name": "heavy metal", "weight": 9.0, "year": 2008}, {"source": "77", "target": "87", "source_name": "rock music", "target_name": "music hall", "weight": 3.0, "year": 2008}, {"source": "77", "target": "88", "source_name": "rock music", "target_name": "oxford university press", "weight": 1.0, "year": 2008}, {"source": "77", "target": "89", "source_name": "rock music", "target_name": "electronic music", "weight": 3.0, "year": 2008}, {"source": "78", "target": "79", "source_name": "hip hop", "target_name": "popular culture", "weight": 2.0, "year": 2008}, {"source": "78", "target": "80", "source_name": "hip hop", "target_name": "folk music", "weight": 2.0, "year": 2008}, {"source": "78", "target": "82", "source_name": "hip hop", "target_name": "heavy metal", "weight": 2.0, "year": 2008}, {"source": "78", "target": "88", "source_name": "hip hop", "target_name": "oxford university press", "weight": 1.0, "year": 2008}, {"source": "79", "target": "80", "source_name": "popular culture", "target_name": "folk music", "weight": 2.0, "year": 2008}, {"source": "79", "target": "82", "source_name": "popular culture", "target_name": "heavy metal", "weight": 2.0, "year": 2008}, {"source": "79", "target": "85", "source_name": "popular culture", "target_name": "jewish music", "weight": 1.0, "year": 2008}, {"source": "79", "target": "87", "source_name": "popular culture", "target_name": "music hall", "weight": 2.0, "year": 2008}, {"source": "79", "target": "88", "source_name": "popular culture", "target_name": "oxford university press", "weight": 1.0, "year": 2008}, {"source": "80", "target": "85", "source_name": "folk music", "target_name": "jewish music", "weight": 1.0, "year": 2008}, {"source": "80", "target": "87", "source_name": "folk music", "target_name": "music hall", "weight": 1.0, "year": 2008}, {"source": "80", "target": "88", "source_name": "folk music", "target_name": "oxford university press", "weight": 1.0, "year": 2008}, {"source": "80", "target": "89", "source_name": "folk music", "target_name": "electronic music", "weight": 3.0, "year": 2008}, {"source": "85", "target": "88", "source_name": "jewish music", "target_name": "oxford university press", "weight": 1.0, "year": 2008}]}, {"2009": [{"source": "1", "target": "7", "source_name": "rock star", "target_name": "nineteenth century", "weight": 1.0, "year": 2009}, {"source": "1", "target": "9", "source_name": "rock star", "target_name": "compact disc", "weight": 1.0, "year": 2009}, {"source": "1", "target": "28", "source_name": "rock star", "target_name": "high school", "weight": 1.0, "year": 2009}, {"source": "1", "target": "29", "source_name": "rock star", "target_name": "rolling stone", "weight": 1.0, "year": 2009}, {"source": "1", "target": "36", "source_name": "rock star", "target_name": "music industry", "weight": 2.0, "year": 2009}, {"source": "1", "target": "41", "source_name": "rock star", "target_name": "youth culture", "weight": 2.0, "year": 2009}, {"source": "1", "target": "48", "source_name": "rock star", "target_name": "pop music", "weight": 4.0, "year": 2009}, {"source": "1", "target": "51", "source_name": "rock star", "target_name": "cultural identity", "weight": 1.0, "year": 2009}, {"source": "1", "target": "53", "source_name": "rock star", "target_name": "popular music", "weight": 2.0, "year": 2009}, {"source": "1", "target": "69", "source_name": "rock star", "target_name": "classical music", "weight": 1.0, "year": 2009}, {"source": "1", "target": "74", "source_name": "rock star", "target_name": "united states", "weight": 1.0, "year": 2009}, {"source": "1", "target": "77", "source_name": "rock star", "target_name": "rock music", "weight": 7.0, "year": 2009}, {"source": "1", "target": "82", "source_name": "rock star", "target_name": "heavy metal", "weight": 2.0, "year": 2009}, {"source": "2", "target": "19", "source_name": "indie rock", "target_name": "music video", "weight": 1.0, "year": 2009}, {"source": "2", "target": "36", "source_name": "indie rock", "target_name": "music industry", "weight": 1.0, "year": 2009}, {"source": "2", "target": "48", "source_name": "indie rock", "target_name": "pop music", "weight": 2.0, "year": 2009}, {"source": "2", "target": "51", "source_name": "indie rock", "target_name": "cultural identity", "weight": 1.0, "year": 2009}, {"source": "2", "target": "53", "source_name": "indie rock", "target_name": "popular music", "weight": 2.0, "year": 2009}, {"source": "2", "target": "67", "source_name": "indie rock", "target_name": "rock art", "weight": 1.0, "year": 2009}, {"source": "2", "target": "72", "source_name": "indie rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2009}, {"source": "2", "target": "74", "source_name": "indie rock", "target_name": "united states", "weight": 1.0, "year": 2009}, {"source": "2", "target": "77", "source_name": "indie rock", "target_name": "rock music", "weight": 4.0, "year": 2009}, {"source": "2", "target": "78", "source_name": "indie rock", "target_name": "hip hop", "weight": 1.0, "year": 2009}, {"source": "2", "target": "80", "source_name": "indie rock", "target_name": "folk music", "weight": 1.0, "year": 2009}, {"source": "3", "target": "79", "source_name": "glam rock", "target_name": "popular culture", "weight": 1.0, "year": 2009}, {"source": "4", "target": "7", "source_name": "gregorian chant", "target_name": "nineteenth century", "weight": 1.0, "year": 2009}, {"source": "4", "target": "9", "source_name": "gregorian chant", "target_name": "compact disc", "weight": 1.0, "year": 2009}, {"source": "4", "target": "10", "source_name": "gregorian chant", "target_name": "african american", "weight": 1.0, "year": 2009}, {"source": "4", "target": "19", "source_name": "gregorian chant", "target_name": "music video", "weight": 1.0, "year": 2009}, {"source": "4", "target": "22", "source_name": "gregorian chant", "target_name": "chamber music", "weight": 1.0, "year": 2009}, {"source": "4", "target": "36", "source_name": "gregorian chant", "target_name": "music industry", "weight": 1.0, "year": 2009}, {"source": "4", "target": "37", "source_name": "gregorian chant", "target_name": "middle ages", "weight": 1.0, "year": 2009}, {"source": "4", "target": "38", "source_name": "gregorian chant", "target_name": "summary additional listening", "weight": 1.0, "year": 2009}, {"source": "4", "target": "40", "source_name": "gregorian chant", "target_name": "musical instruments", "weight": 1.0, "year": 2009}, {"source": "4", "target": "48", "source_name": "gregorian chant", "target_name": "pop music", "weight": 1.0, "year": 2009}, {"source": "4", "target": "52", "source_name": "gregorian chant", "target_name": "folk song", "weight": 1.0, "year": 2009}, {"source": "4", "target": "53", "source_name": "gregorian chant", "target_name": "popular music", "weight": 1.0, "year": 2009}, {"source": "4", "target": "54", "source_name": "gregorian chant", "target_name": "american popular music", "weight": 1.0, "year": 2009}, {"source": "4", "target": "65", "source_name": "gregorian chant", "target_name": "country music", "weight": 1.0, "year": 2009}, {"source": "4", "target": "69", "source_name": "gregorian chant", "target_name": "classical music", "weight": 1.0, "year": 2009}, {"source": "4", "target": "74", "source_name": "gregorian chant", "target_name": "united states", "weight": 1.0, "year": 2009}, {"source": "4", "target": "80", "source_name": "gregorian chant", "target_name": "folk music", "weight": 1.0, "year": 2009}, {"source": "4", "target": "89", "source_name": "gregorian chant", "target_name": "electronic music", "weight": 1.0, "year": 2009}, {"source": "5", "target": "12", "source_name": "jesus christ superstar", "target_name": "rock opera", "weight": 1.0, "year": 2009}, {"source": "5", "target": "15", "source_name": "jesus christ superstar", "target_name": "musical theatre", "weight": 2.0, "year": 2009}, {"source": "5", "target": "33", "source_name": "jesus christ superstar", "target_name": "jesus christ", "weight": 2.0, "year": 2009}, {"source": "5", "target": "34", "source_name": "jesus christ superstar", "target_name": "mass media", "weight": 1.0, "year": 2009}, {"source": "5", "target": "53", "source_name": "jesus christ superstar", "target_name": "popular music", "weight": 1.0, "year": 2009}, {"source": "5", "target": "77", "source_name": "jesus christ superstar", "target_name": "rock music", "weight": 3.0, "year": 2009}, {"source": "6", "target": "10", "source_name": "elvis presley", "target_name": "african american", "weight": 1.0, "year": 2009}, {"source": "6", "target": "16", "source_name": "elvis presley", "target_name": "bob dylan", "weight": 1.0, "year": 2009}, {"source": "6", "target": "17", "source_name": "elvis presley", "target_name": "civil rights", "weight": 1.0, "year": 2009}, {"source": "6", "target": "23", "source_name": "elvis presley", "target_name": "electronic dance music", "weight": 1.0, "year": 2009}, {"source": "6", "target": "29", "source_name": "elvis presley", "target_name": "rolling stone", "weight": 1.0, "year": 2009}, {"source": "6", "target": "36", "source_name": "elvis presley", "target_name": "music industry", "weight": 2.0, "year": 2009}, {"source": "6", "target": "40", "source_name": "elvis presley", "target_name": "musical instruments", "weight": 1.0, "year": 2009}, {"source": "6", "target": "41", "source_name": "elvis presley", "target_name": "youth culture", "weight": 1.0, "year": 2009}, {"source": "6", "target": "42", "source_name": "elvis presley", "target_name": "simon frith", "weight": 2.0, "year": 2009}, {"source": "6", "target": "47", "source_name": "elvis presley", "target_name": "hard rock", "weight": 1.0, "year": 2009}, {"source": "6", "target": "48", "source_name": "elvis presley", "target_name": "pop music", "weight": 1.0, "year": 2009}, {"source": "6", "target": "51", "source_name": "elvis presley", "target_name": "cultural identity", "weight": 1.0, "year": 2009}, {"source": "6", "target": "53", "source_name": "elvis presley", "target_name": "popular music", "weight": 4.0, "year": 2009}, {"source": "6", "target": "54", "source_name": "elvis presley", "target_name": "american popular music", "weight": 2.0, "year": 2009}, {"source": "6", "target": "56", "source_name": "elvis presley", "target_name": "bruce springsteen", "weight": 1.0, "year": 2009}, {"source": "6", "target": "60", "source_name": "elvis presley", "target_name": "cultural studies", "weight": 1.0, "year": 2009}, {"source": "6", "target": "67", "source_name": "elvis presley", "target_name": "rock art", "weight": 1.0, "year": 2009}, {"source": "6", "target": "72", "source_name": "elvis presley", "target_name": "jimi hendrix", "weight": 1.0, "year": 2009}, {"source": "6", "target": "74", "source_name": "elvis presley", "target_name": "united states", "weight": 2.0, "year": 2009}, {"source": "6", "target": "77", "source_name": "elvis presley", "target_name": "rock music", "weight": 2.0, "year": 2009}, {"source": "6", "target": "78", "source_name": "elvis presley", "target_name": "hip hop", "weight": 1.0, "year": 2009}, {"source": "6", "target": "79", "source_name": "elvis presley", "target_name": "popular culture", "weight": 1.0, "year": 2009}, {"source": "6", "target": "80", "source_name": "elvis presley", "target_name": "folk music", "weight": 1.0, "year": 2009}, {"source": "6", "target": "82", "source_name": "elvis presley", "target_name": "heavy metal", "weight": 1.0, "year": 2009}, {"source": "7", "target": "9", "source_name": "nineteenth century", "target_name": "compact disc", "weight": 1.0, "year": 2009}, {"source": "7", "target": "10", "source_name": "nineteenth century", "target_name": "african american", "weight": 1.0, "year": 2009}, {"source": "7", "target": "19", "source_name": "nineteenth century", "target_name": "music video", "weight": 1.0, "year": 2009}, {"source": "7", "target": "22", "source_name": "nineteenth century", "target_name": "chamber music", "weight": 1.0, "year": 2009}, {"source": "7", "target": "34", "source_name": "nineteenth century", "target_name": "mass media", "weight": 1.0, "year": 2009}, {"source": "7", "target": "36", "source_name": "nineteenth century", "target_name": "music industry", "weight": 1.0, "year": 2009}, {"source": "7", "target": "38", "source_name": "nineteenth century", "target_name": "summary additional listening", "weight": 1.0, "year": 2009}, {"source": "7", "target": "40", "source_name": "nineteenth century", "target_name": "musical instruments", "weight": 1.0, "year": 2009}, {"source": "7", "target": "43", "source_name": "nineteenth century", "target_name": "music education", "weight": 1.0, "year": 2009}, {"source": "7", "target": "52", "source_name": "nineteenth century", "target_name": "folk song", "weight": 2.0, "year": 2009}, {"source": "7", "target": "53", "source_name": "nineteenth century", "target_name": "popular music", "weight": 2.0, "year": 2009}, {"source": "7", "target": "54", "source_name": "nineteenth century", "target_name": "american popular music", "weight": 1.0, "year": 2009}, {"source": "7", "target": "65", "source_name": "nineteenth century", "target_name": "country music", "weight": 1.0, "year": 2009}, {"source": "7", "target": "69", "source_name": "nineteenth century", "target_name": "classical music", "weight": 2.0, "year": 2009}, {"source": "7", "target": "70", "source_name": "nineteenth century", "target_name": "world war", "weight": 2.0, "year": 2009}, {"source": "7", "target": "74", "source_name": "nineteenth century", "target_name": "united states", "weight": 2.0, "year": 2009}, {"source": "7", "target": "79", "source_name": "nineteenth century", "target_name": "popular culture", "weight": 1.0, "year": 2009}, {"source": "7", "target": "80", "source_name": "nineteenth century", "target_name": "folk music", "weight": 1.0, "year": 2009}, {"source": "7", "target": "85", "source_name": "nineteenth century", "target_name": "jewish music", "weight": 1.0, "year": 2009}, {"source": "7", "target": "89", "source_name": "nineteenth century", "target_name": "electronic music", "weight": 1.0, "year": 2009}, {"source": "8", "target": "20", "source_name": "christian rock", "target_name": "garage rock", "weight": 1.0, "year": 2009}, {"source": "8", "target": "36", "source_name": "christian rock", "target_name": "music industry", "weight": 1.0, "year": 2009}, {"source": "8", "target": "44", "source_name": "christian rock", "target_name": "alternative rock", "weight": 1.0, "year": 2009}, {"source": "8", "target": "53", "source_name": "christian rock", "target_name": "popular music", "weight": 2.0, "year": 2009}, {"source": "8", "target": "57", "source_name": "christian rock", "target_name": "north america", "weight": 1.0, "year": 2009}, {"source": "8", "target": "65", "source_name": "christian rock", "target_name": "country music", "weight": 1.0, "year": 2009}, {"source": "8", "target": "73", "source_name": "christian rock", "target_name": "southern rock", "weight": 1.0, "year": 2009}, {"source": "8", "target": "77", "source_name": "christian rock", "target_name": "rock music", "weight": 1.0, "year": 2009}, {"source": "8", "target": "79", "source_name": "christian rock", "target_name": "popular culture", "weight": 1.0, "year": 2009}, {"source": "8", "target": "80", "source_name": "christian rock", "target_name": "folk music", "weight": 1.0, "year": 2009}, {"source": "9", "target": "10", "source_name": "compact disc", "target_name": "african american", "weight": 1.0, "year": 2009}, {"source": "9", "target": "24", "source_name": "compact disc", "target_name": "punk rock", "weight": 1.0, "year": 2009}, {"source": "9", "target": "29", "source_name": "compact disc", "target_name": "rolling stone", "weight": 1.0, "year": 2009}, {"source": "9", "target": "36", "source_name": "compact disc", "target_name": "music industry", "weight": 1.0, "year": 2009}, {"source": "9", "target": "37", "source_name": "compact disc", "target_name": "middle ages", "weight": 1.0, "year": 2009}, {"source": "9", "target": "48", "source_name": "compact disc", "target_name": "pop music", "weight": 1.0, "year": 2009}, {"source": "9", "target": "53", "source_name": "compact disc", "target_name": "popular music", "weight": 3.0, "year": 2009}, {"source": "9", "target": "74", "source_name": "compact disc", "target_name": "united states", "weight": 1.0, "year": 2009}, {"source": "9", "target": "77", "source_name": "compact disc", "target_name": "rock music", "weight": 1.0, "year": 2009}, {"source": "9", "target": "79", "source_name": "compact disc", "target_name": "popular culture", "weight": 1.0, "year": 2009}, {"source": "9", "target": "80", "source_name": "compact disc", "target_name": "folk music", "weight": 2.0, "year": 2009}, {"source": "9", "target": "85", "source_name": "compact disc", "target_name": "jewish music", "weight": 1.0, "year": 2009}, {"source": "9", "target": "89", "source_name": "compact disc", "target_name": "electronic music", "weight": 1.0, "year": 2009}, {"source": "10", "target": "15", "source_name": "african american", "target_name": "musical theatre", "weight": 1.0, "year": 2009}, {"source": "10", "target": "17", "source_name": "african american", "target_name": "civil rights", "weight": 1.0, "year": 2009}, {"source": "10", "target": "19", "source_name": "african american", "target_name": "music video", "weight": 1.0, "year": 2009}, {"source": "10", "target": "22", "source_name": "african american", "target_name": "chamber music", "weight": 1.0, "year": 2009}, {"source": "10", "target": "24", "source_name": "african american", "target_name": "punk rock", "weight": 1.0, "year": 2009}, {"source": "10", "target": "36", "source_name": "african american", "target_name": "music industry", "weight": 2.0, "year": 2009}, {"source": "10", "target": "38", "source_name": "african american", "target_name": "summary additional listening", "weight": 1.0, "year": 2009}, {"source": "10", "target": "40", "source_name": "african american", "target_name": "musical instruments", "weight": 1.0, "year": 2009}, {"source": "10", "target": "52", "source_name": "african american", "target_name": "folk song", "weight": 1.0, "year": 2009}, {"source": "10", "target": "53", "source_name": "african american", "target_name": "popular music", "weight": 5.0, "year": 2009}, {"source": "10", "target": "54", "source_name": "african american", "target_name": "american popular music", "weight": 1.0, "year": 2009}, {"source": "10", "target": "65", "source_name": "african american", "target_name": "country music", "weight": 1.0, "year": 2009}, {"source": "10", "target": "69", "source_name": "african american", "target_name": "classical music", "weight": 1.0, "year": 2009}, {"source": "10", "target": "74", "source_name": "african american", "target_name": "united states", "weight": 3.0, "year": 2009}, {"source": "10", "target": "75", "source_name": "african american", "target_name": "world war ii", "weight": 1.0, "year": 2009}, {"source": "10", "target": "78", "source_name": "african american", "target_name": "hip hop", "weight": 1.0, "year": 2009}, {"source": "10", "target": "79", "source_name": "african american", "target_name": "popular culture", "weight": 2.0, "year": 2009}, {"source": "10", "target": "80", "source_name": "african american", "target_name": "folk music", "weight": 2.0, "year": 2009}, {"source": "10", "target": "89", "source_name": "african american", "target_name": "electronic music", "weight": 1.0, "year": 2009}, {"source": "11", "target": "23", "source_name": "south africa", "target_name": "electronic dance music", "weight": 1.0, "year": 2009}, {"source": "11", "target": "36", "source_name": "south africa", "target_name": "music industry", "weight": 1.0, "year": 2009}, {"source": "11", "target": "53", "source_name": "south africa", "target_name": "popular music", "weight": 1.0, "year": 2009}, {"source": "11", "target": "74", "source_name": "south africa", "target_name": "united states", "weight": 2.0, "year": 2009}, {"source": "11", "target": "88", "source_name": "south africa", "target_name": "oxford university press", "weight": 1.0, "year": 2009}, {"source": "12", "target": "15", "source_name": "rock opera", "target_name": "musical theatre", "weight": 3.0, "year": 2009}, {"source": "12", "target": "33", "source_name": "rock opera", "target_name": "jesus christ", "weight": 1.0, "year": 2009}, {"source": "12", "target": "53", "source_name": "rock opera", "target_name": "popular music", "weight": 1.0, "year": 2009}, {"source": "12", "target": "57", "source_name": "rock opera", "target_name": "north america", "weight": 1.0, "year": 2009}, {"source": "12", "target": "77", "source_name": "rock opera", "target_name": "rock music", "weight": 1.0, "year": 2009}, {"source": "12", "target": "79", "source_name": "rock opera", "target_name": "popular culture", "weight": 1.0, "year": 2009}, {"source": "15", "target": "33", "source_name": "musical theatre", "target_name": "jesus christ", "weight": 2.0, "year": 2009}, {"source": "15", "target": "53", "source_name": "musical theatre", "target_name": "popular music", "weight": 1.0, "year": 2009}, {"source": "15", "target": "70", "source_name": "musical theatre", "target_name": "world war", "weight": 1.0, "year": 2009}, {"source": "15", "target": "74", "source_name": "musical theatre", "target_name": "united states", "weight": 1.0, "year": 2009}, {"source": "15", "target": "77", "source_name": "musical theatre", "target_name": "rock music", "weight": 3.0, "year": 2009}, {"source": "15", "target": "87", "source_name": "musical theatre", "target_name": "music hall", "weight": 1.0, "year": 2009}, {"source": "16", "target": "29", "source_name": "bob dylan", "target_name": "rolling stone", "weight": 1.0, "year": 2009}, {"source": "16", "target": "30", "source_name": "bob dylan", "target_name": "rock band", "weight": 2.0, "year": 2009}, {"source": "16", "target": "36", "source_name": "bob dylan", "target_name": "music industry", "weight": 1.0, "year": 2009}, {"source": "16", "target": "42", "source_name": "bob dylan", "target_name": "simon frith", "weight": 1.0, "year": 2009}, {"source": "16", "target": "48", "source_name": "bob dylan", "target_name": "pop music", "weight": 2.0, "year": 2009}, {"source": "16", "target": "52", "source_name": "bob dylan", "target_name": "folk song", "weight": 1.0, "year": 2009}, {"source": "16", "target": "53", "source_name": "bob dylan", "target_name": "popular music", "weight": 7.0, "year": 2009}, {"source": "16", "target": "69", "source_name": "bob dylan", "target_name": "classical music", "weight": 1.0, "year": 2009}, {"source": "16", "target": "72", "source_name": "bob dylan", "target_name": "jimi hendrix", "weight": 2.0, "year": 2009}, {"source": "16", "target": "77", "source_name": "bob dylan", "target_name": "rock music", "weight": 5.0, "year": 2009}, {"source": "16", "target": "80", "source_name": "bob dylan", "target_name": "folk music", "weight": 4.0, "year": 2009}, {"source": "17", "target": "30", "source_name": "civil rights", "target_name": "rock band", "weight": 1.0, "year": 2009}, {"source": "17", "target": "41", "source_name": "civil rights", "target_name": "youth culture", "weight": 1.0, "year": 2009}, {"source": "17", "target": "53", "source_name": "civil rights", "target_name": "popular music", "weight": 2.0, "year": 2009}, {"source": "17", "target": "73", "source_name": "civil rights", "target_name": "southern rock", "weight": 1.0, "year": 2009}, {"source": "17", "target": "74", "source_name": "civil rights", "target_name": "united states", "weight": 1.0, "year": 2009}, {"source": "17", "target": "75", "source_name": "civil rights", "target_name": "world war ii", "weight": 1.0, "year": 2009}, {"source": "17", "target": "77", "source_name": "civil rights", "target_name": "rock music", "weight": 1.0, "year": 2009}, {"source": "17", "target": "79", "source_name": "civil rights", "target_name": "popular culture", "weight": 1.0, "year": 2009}, {"source": "18", "target": "30", "source_name": "middle class", "target_name": "rock band", "weight": 1.0, "year": 2009}, {"source": "18", "target": "53", "source_name": "middle class", "target_name": "popular music", "weight": 1.0, "year": 2009}, {"source": "18", "target": "61", "source_name": "middle class", "target_name": "progressive rock", "weight": 1.0, "year": 2009}, {"source": "18", "target": "77", "source_name": "middle class", "target_name": "rock music", "weight": 1.0, "year": 2009}, {"source": "19", "target": "22", "source_name": "music video", "target_name": "chamber music", "weight": 1.0, "year": 2009}, {"source": "19", "target": "30", "source_name": "music video", "target_name": "rock band", "weight": 1.0, "year": 2009}, {"source": "19", "target": "36", "source_name": "music video", "target_name": "music industry", "weight": 2.0, "year": 2009}, {"source": "19", "target": "38", "source_name": "music video", "target_name": "summary additional listening", "weight": 1.0, "year": 2009}, {"source": "19", "target": "40", "source_name": "music video", "target_name": "musical instruments", "weight": 1.0, "year": 2009}, {"source": "19", "target": "47", "source_name": "music video", "target_name": "hard rock", "weight": 1.0, "year": 2009}, {"source": "19", "target": "48", "source_name": "music video", "target_name": "pop music", "weight": 3.0, "year": 2009}, {"source": "19", "target": "49", "source_name": "music video", "target_name": "music theory", "weight": 1.0, "year": 2009}, {"source": "19", "target": "51", "source_name": "music video", "target_name": "cultural identity", "weight": 2.0, "year": 2009}, {"source": "19", "target": "52", "source_name": "music video", "target_name": "folk song", "weight": 1.0, "year": 2009}, {"source": "19", "target": "53", "source_name": "music video", "target_name": "popular music", "weight": 5.0, "year": 2009}, {"source": "19", "target": "54", "source_name": "music video", "target_name": "american popular music", "weight": 1.0, "year": 2009}, {"source": "19", "target": "65", "source_name": "music video", "target_name": "country music", "weight": 4.0, "year": 2009}, {"source": "19", "target": "69", "source_name": "music video", "target_name": "classical music", "weight": 1.0, "year": 2009}, {"source": "19", "target": "72", "source_name": "music video", "target_name": "jimi hendrix", "weight": 1.0, "year": 2009}, {"source": "19", "target": "74", "source_name": "music video", "target_name": "united states", "weight": 2.0, "year": 2009}, {"source": "19", "target": "76", "source_name": "music video", "target_name": "los angeles", "weight": 1.0, "year": 2009}, {"source": "19", "target": "77", "source_name": "music video", "target_name": "rock music", "weight": 8.0, "year": 2009}, {"source": "19", "target": "78", "source_name": "music video", "target_name": "hip hop", "weight": 1.0, "year": 2009}, {"source": "19", "target": "80", "source_name": "music video", "target_name": "folk music", "weight": 1.0, "year": 2009}, {"source": "19", "target": "82", "source_name": "music video", "target_name": "heavy metal", "weight": 1.0, "year": 2009}, {"source": "19", "target": "89", "source_name": "music video", "target_name": "electronic music", "weight": 1.0, "year": 2009}, {"source": "20", "target": "29", "source_name": "garage rock", "target_name": "rolling stone", "weight": 1.0, "year": 2009}, {"source": "20", "target": "30", "source_name": "garage rock", "target_name": "rock band", "weight": 2.0, "year": 2009}, {"source": "20", "target": "43", "source_name": "garage rock", "target_name": "music education", "weight": 1.0, "year": 2009}, {"source": "20", "target": "44", "source_name": "garage rock", "target_name": "alternative rock", "weight": 1.0, "year": 2009}, {"source": "20", "target": "48", "source_name": "garage rock", "target_name": "pop music", "weight": 1.0, "year": 2009}, {"source": "20", "target": "53", "source_name": "garage rock", "target_name": "popular music", "weight": 3.0, "year": 2009}, {"source": "20", "target": "57", "source_name": "garage rock", "target_name": "north america", "weight": 1.0, "year": 2009}, {"source": "20", "target": "65", "source_name": "garage rock", "target_name": "country music", "weight": 1.0, "year": 2009}, {"source": "20", "target": "73", "source_name": "garage rock", "target_name": "southern rock", "weight": 1.0, "year": 2009}, {"source": "20", "target": "77", "source_name": "garage rock", "target_name": "rock music", "weight": 2.0, "year": 2009}, {"source": "20", "target": "80", "source_name": "garage rock", "target_name": "folk music", "weight": 1.0, "year": 2009}, {"source": "21", "target": "47", "source_name": "social protest", "target_name": "hard rock", "weight": 1.0, "year": 2009}, {"source": "21", "target": "48", "source_name": "social protest", "target_name": "pop music", "weight": 1.0, "year": 2009}, {"source": "21", "target": "53", "source_name": "social protest", "target_name": "popular music", "weight": 2.0, "year": 2009}, {"source": "21", "target": "57", "source_name": "social protest", "target_name": "north america", "weight": 2.0, "year": 2009}, {"source": "21", "target": "71", "source_name": "social protest", "target_name": "latin american", "weight": 1.0, "year": 2009}, {"source": "21", "target": "74", "source_name": "social protest", "target_name": "united states", "weight": 1.0, "year": 2009}, {"source": "21", "target": "77", "source_name": "social protest", "target_name": "rock music", "weight": 1.0, "year": 2009}, {"source": "21", "target": "82", "source_name": "social protest", "target_name": "heavy metal", "weight": 1.0, "year": 2009}, {"source": "22", "target": "35", "source_name": "chamber music", "target_name": "ancient greek", "weight": 1.0, "year": 2009}, {"source": "22", "target": "36", "source_name": "chamber music", "target_name": "music industry", "weight": 1.0, "year": 2009}, {"source": "22", "target": "38", "source_name": "chamber music", "target_name": "summary additional listening", "weight": 1.0, "year": 2009}, {"source": "22", "target": "40", "source_name": "chamber music", "target_name": "musical instruments", "weight": 1.0, "year": 2009}, {"source": "22", "target": "52", "source_name": "chamber music", "target_name": "folk song", "weight": 1.0, "year": 2009}, {"source": "22", "target": "53", "source_name": "chamber music", "target_name": "popular music", "weight": 1.0, "year": 2009}, {"source": "22", "target": "54", "source_name": "chamber music", "target_name": "american popular music", "weight": 1.0, "year": 2009}, {"source": "22", "target": "65", "source_name": "chamber music", "target_name": "country music", "weight": 2.0, "year": 2009}, {"source": "22", "target": "69", "source_name": "chamber music", "target_name": "classical music", "weight": 2.0, "year": 2009}, {"source": "22", "target": "74", "source_name": "chamber music", "target_name": "united states", "weight": 1.0, "year": 2009}, {"source": "22", "target": "77", "source_name": "chamber music", "target_name": "rock music", "weight": 1.0, "year": 2009}, {"source": "22", "target": "80", "source_name": "chamber music", "target_name": "folk music", "weight": 2.0, "year": 2009}, {"source": "22", "target": "89", "source_name": "chamber music", "target_name": "electronic music", "weight": 3.0, "year": 2009}, {"source": "23", "target": "36", "source_name": "electronic dance music", "target_name": "music industry", "weight": 1.0, "year": 2009}, {"source": "23", "target": "42", "source_name": "electronic dance music", "target_name": "simon frith", "weight": 2.0, "year": 2009}, {"source": "23", "target": "47", "source_name": "electronic dance music", "target_name": "hard rock", "weight": 1.0, "year": 2009}, {"source": "23", "target": "53", "source_name": "electronic dance music", "target_name": "popular music", "weight": 3.0, "year": 2009}, {"source": "23", "target": "56", "source_name": "electronic dance music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2009}, {"source": "23", "target": "60", "source_name": "electronic dance music", "target_name": "cultural studies", "weight": 1.0, "year": 2009}, {"source": "23", "target": "76", "source_name": "electronic dance music", "target_name": "los angeles", "weight": 1.0, "year": 2009}, {"source": "23", "target": "78", "source_name": "electronic dance music", "target_name": "hip hop", "weight": 1.0, "year": 2009}, {"source": "23", "target": "79", "source_name": "electronic dance music", "target_name": "popular culture", "weight": 1.0, "year": 2009}, {"source": "23", "target": "82", "source_name": "electronic dance music", "target_name": "heavy metal", "weight": 1.0, "year": 2009}, {"source": "24", "target": "36", "source_name": "punk rock", "target_name": "music industry", "weight": 1.0, "year": 2009}, {"source": "24", "target": "42", "source_name": "punk rock", "target_name": "simon frith", "weight": 1.0, "year": 2009}, {"source": "24", "target": "44", "source_name": "punk rock", "target_name": "alternative rock", "weight": 1.0, "year": 2009}, {"source": "24", "target": "47", "source_name": "punk rock", "target_name": "hard rock", "weight": 2.0, "year": 2009}, {"source": "24", "target": "48", "source_name": "punk rock", "target_name": "pop music", "weight": 4.0, "year": 2009}, {"source": "24", "target": "53", "source_name": "punk rock", "target_name": "popular music", "weight": 5.0, "year": 2009}, {"source": "24", "target": "65", "source_name": "punk rock", "target_name": "country music", "weight": 1.0, "year": 2009}, {"source": "24", "target": "69", "source_name": "punk rock", "target_name": "classical music", "weight": 1.0, "year": 2009}, {"source": "24", "target": "74", "source_name": "punk rock", "target_name": "united states", "weight": 1.0, "year": 2009}, {"source": "24", "target": "77", "source_name": "punk rock", "target_name": "rock music", "weight": 5.0, "year": 2009}, {"source": "24", "target": "78", "source_name": "punk rock", "target_name": "hip hop", "weight": 1.0, "year": 2009}, {"source": "24", "target": "79", "source_name": "punk rock", "target_name": "popular culture", "weight": 1.0, "year": 2009}, {"source": "24", "target": "80", "source_name": "punk rock", "target_name": "folk music", "weight": 1.0, "year": 2009}, {"source": "24", "target": "82", "source_name": "punk rock", "target_name": "heavy metal", "weight": 3.0, "year": 2009}, {"source": "25", "target": "53", "source_name": "russian rock", "target_name": "popular music", "weight": 1.0, "year": 2009}, {"source": "25", "target": "77", "source_name": "russian rock", "target_name": "rock music", "weight": 1.0, "year": 2009}, {"source": "28", "target": "37", "source_name": "high school", "target_name": "middle ages", "weight": 1.0, "year": 2009}, {"source": "28", "target": "48", "source_name": "high school", "target_name": "pop music", "weight": 1.0, "year": 2009}, {"source": "28", "target": "77", "source_name": "high school", "target_name": "rock music", "weight": 2.0, "year": 2009}, {"source": "28", "target": "82", "source_name": "high school", "target_name": "heavy metal", "weight": 1.0, "year": 2009}, {"source": "29", "target": "36", "source_name": "rolling stone", "target_name": "music industry", "weight": 1.0, "year": 2009}, {"source": "29", "target": "42", "source_name": "rolling stone", "target_name": "simon frith", "weight": 1.0, "year": 2009}, {"source": "29", "target": "48", "source_name": "rolling stone", "target_name": "pop music", "weight": 2.0, "year": 2009}, {"source": "29", "target": "53", "source_name": "rolling stone", "target_name": "popular music", "weight": 4.0, "year": 2009}, {"source": "29", "target": "55", "source_name": "rolling stone", "target_name": "rock criticism", "weight": 2.0, "year": 2009}, {"source": "29", "target": "56", "source_name": "rolling stone", "target_name": "bruce springsteen", "weight": 1.0, "year": 2009}, {"source": "29", "target": "62", "source_name": "rolling stone", "target_name": "led zeppelin", "weight": 1.0, "year": 2009}, {"source": "29", "target": "72", "source_name": "rolling stone", "target_name": "jimi hendrix", "weight": 1.0, "year": 2009}, {"source": "29", "target": "74", "source_name": "rolling stone", "target_name": "united states", "weight": 1.0, "year": 2009}, {"source": "29", "target": "77", "source_name": "rolling stone", "target_name": "rock music", "weight": 5.0, "year": 2009}, {"source": "30", "target": "36", "source_name": "rock band", "target_name": "music industry", "weight": 1.0, "year": 2009}, {"source": "30", "target": "37", "source_name": "rock band", "target_name": "middle ages", "weight": 1.0, "year": 2009}, {"source": "30", "target": "43", "source_name": "rock band", "target_name": "music education", "weight": 1.0, "year": 2009}, {"source": "30", "target": "44", "source_name": "rock band", "target_name": "alternative rock", "weight": 1.0, "year": 2009}, {"source": "30", "target": "48", "source_name": "rock band", "target_name": "pop music", "weight": 1.0, "year": 2009}, {"source": "30", "target": "52", "source_name": "rock band", "target_name": "folk song", "weight": 1.0, "year": 2009}, {"source": "30", "target": "53", "source_name": "rock band", "target_name": "popular music", "weight": 13.0, "year": 2009}, {"source": "30", "target": "61", "source_name": "rock band", "target_name": "progressive rock", "weight": 6.0, "year": 2009}, {"source": "30", "target": "65", "source_name": "rock band", "target_name": "country music", "weight": 1.0, "year": 2009}, {"source": "30", "target": "69", "source_name": "rock band", "target_name": "classical music", "weight": 2.0, "year": 2009}, {"source": "30", "target": "72", "source_name": "rock band", "target_name": "jimi hendrix", "weight": 1.0, "year": 2009}, {"source": "30", "target": "73", "source_name": "rock band", "target_name": "southern rock", "weight": 2.0, "year": 2009}, {"source": "30", "target": "74", "source_name": "rock band", "target_name": "united states", "weight": 1.0, "year": 2009}, {"source": "30", "target": "76", "source_name": "rock band", "target_name": "los angeles", "weight": 1.0, "year": 2009}, {"source": "30", "target": "77", "source_name": "rock band", "target_name": "rock music", "weight": 17.0, "year": 2009}, {"source": "30", "target": "80", "source_name": "rock band", "target_name": "folk music", "weight": 2.0, "year": 2009}, {"source": "30", "target": "82", "source_name": "rock band", "target_name": "heavy metal", "weight": 1.0, "year": 2009}, {"source": "32", "target": "43", "source_name": "higher education", "target_name": "music education", "weight": 1.0, "year": 2009}, {"source": "33", "target": "53", "source_name": "jesus christ", "target_name": "popular music", "weight": 1.0, "year": 2009}, {"source": "33", "target": "70", "source_name": "jesus christ", "target_name": "world war", "weight": 1.0, "year": 2009}, {"source": "33", "target": "77", "source_name": "jesus christ", "target_name": "rock music", "weight": 2.0, "year": 2009}, {"source": "34", "target": "36", "source_name": "mass media", "target_name": "music industry", "weight": 1.0, "year": 2009}, {"source": "34", "target": "40", "source_name": "mass media", "target_name": "musical instruments", "weight": 1.0, "year": 2009}, {"source": "34", "target": "41", "source_name": "mass media", "target_name": "youth culture", "weight": 1.0, "year": 2009}, {"source": "34", "target": "46", "source_name": "mass media", "target_name": "music festival", "weight": 1.0, "year": 2009}, {"source": "34", "target": "48", "source_name": "mass media", "target_name": "pop music", "weight": 2.0, "year": 2009}, {"source": "34", "target": "51", "source_name": "mass media", "target_name": "cultural identity", "weight": 1.0, "year": 2009}, {"source": "34", "target": "52", "source_name": "mass media", "target_name": "folk song", "weight": 2.0, "year": 2009}, {"source": "34", "target": "53", "source_name": "mass media", "target_name": "popular music", "weight": 6.0, "year": 2009}, {"source": "34", "target": "65", "source_name": "mass media", "target_name": "country music", "weight": 1.0, "year": 2009}, {"source": "34", "target": "66", "source_name": "mass media", "target_name": "hong kong", "weight": 1.0, "year": 2009}, {"source": "34", "target": "67", "source_name": "mass media", "target_name": "rock art", "weight": 1.0, "year": 2009}, {"source": "34", "target": "69", "source_name": "mass media", "target_name": "classical music", "weight": 1.0, "year": 2009}, {"source": "34", "target": "77", "source_name": "mass media", "target_name": "rock music", "weight": 4.0, "year": 2009}, {"source": "34", "target": "79", "source_name": "mass media", "target_name": "popular culture", "weight": 1.0, "year": 2009}, {"source": "35", "target": "43", "source_name": "ancient greek", "target_name": "music education", "weight": 1.0, "year": 2009}, {"source": "35", "target": "65", "source_name": "ancient greek", "target_name": "country music", "weight": 1.0, "year": 2009}, {"source": "35", "target": "77", "source_name": "ancient greek", "target_name": "rock music", "weight": 1.0, "year": 2009}, {"source": "35", "target": "80", "source_name": "ancient greek", "target_name": "folk music", "weight": 1.0, "year": 2009}, {"source": "35", "target": "89", "source_name": "ancient greek", "target_name": "electronic music", "weight": 1.0, "year": 2009}, {"source": "36", "target": "38", "source_name": "music industry", "target_name": "summary additional listening", "weight": 1.0, "year": 2009}, {"source": "36", "target": "40", "source_name": "music industry", "target_name": "musical instruments", "weight": 1.0, "year": 2009}, {"source": "36", "target": "41", "source_name": "music industry", "target_name": "youth culture", "weight": 2.0, "year": 2009}, {"source": "36", "target": "42", "source_name": "music industry", "target_name": "simon frith", "weight": 2.0, "year": 2009}, {"source": "36", "target": "43", "source_name": "music industry", "target_name": "music education", "weight": 2.0, "year": 2009}, {"source": "36", "target": "46", "source_name": "music industry", "target_name": "music festival", "weight": 1.0, "year": 2009}, {"source": "36", "target": "47", "source_name": "music industry", "target_name": "hard rock", "weight": 3.0, "year": 2009}, {"source": "36", "target": "48", "source_name": "music industry", "target_name": "pop music", "weight": 7.0, "year": 2009}, {"source": "36", "target": "49", "source_name": "music industry", "target_name": "music theory", "weight": 1.0, "year": 2009}, {"source": "36", "target": "50", "source_name": "music industry", "target_name": "hollywood film", "weight": 1.0, "year": 2009}, {"source": "36", "target": "51", "source_name": "music industry", "target_name": "cultural identity", "weight": 1.0, "year": 2009}, {"source": "36", "target": "52", "source_name": "music industry", "target_name": "folk song", "weight": 1.0, "year": 2009}, {"source": "36", "target": "53", "source_name": "music industry", "target_name": "popular music", "weight": 25.0, "year": 2009}, {"source": "36", "target": "54", "source_name": "music industry", "target_name": "american popular music", "weight": 2.0, "year": 2009}, {"source": "36", "target": "55", "source_name": "music industry", "target_name": "rock criticism", "weight": 1.0, "year": 2009}, {"source": "36", "target": "56", "source_name": "music industry", "target_name": "bruce springsteen", "weight": 1.0, "year": 2009}, {"source": "36", "target": "61", "source_name": "music industry", "target_name": "progressive rock", "weight": 1.0, "year": 2009}, {"source": "36", "target": "65", "source_name": "music industry", "target_name": "country music", "weight": 2.0, "year": 2009}, {"source": "36", "target": "66", "source_name": "music industry", "target_name": "hong kong", "weight": 1.0, "year": 2009}, {"source": "36", "target": "67", "source_name": "music industry", "target_name": "rock art", "weight": 1.0, "year": 2009}, {"source": "36", "target": "68", "source_name": "music industry", "target_name": "hearing loss", "weight": 1.0, "year": 2009}, {"source": "36", "target": "69", "source_name": "music industry", "target_name": "classical music", "weight": 4.0, "year": 2009}, {"source": "36", "target": "70", "source_name": "music industry", "target_name": "world war", "weight": 1.0, "year": 2009}, {"source": "36", "target": "72", "source_name": "music industry", "target_name": "jimi hendrix", "weight": 3.0, "year": 2009}, {"source": "36", "target": "74", "source_name": "music industry", "target_name": "united states", "weight": 3.0, "year": 2009}, {"source": "36", "target": "75", "source_name": "music industry", "target_name": "world war ii", "weight": 2.0, "year": 2009}, {"source": "36", "target": "76", "source_name": "music industry", "target_name": "los angeles", "weight": 2.0, "year": 2009}, {"source": "36", "target": "77", "source_name": "music industry", "target_name": "rock music", "weight": 12.0, "year": 2009}, {"source": "36", "target": "78", "source_name": "music industry", "target_name": "hip hop", "weight": 5.0, "year": 2009}, {"source": "36", "target": "79", "source_name": "music industry", "target_name": "popular culture", "weight": 4.0, "year": 2009}, {"source": "36", "target": "80", "source_name": "music industry", "target_name": "folk music", "weight": 3.0, "year": 2009}, {"source": "36", "target": "82", "source_name": "music industry", "target_name": "heavy metal", "weight": 2.0, "year": 2009}, {"source": "36", "target": "83", "source_name": "music industry", "target_name": "folk rock", "weight": 1.0, "year": 2009}, {"source": "36", "target": "88", "source_name": "music industry", "target_name": "oxford university press", "weight": 1.0, "year": 2009}, {"source": "36", "target": "89", "source_name": "music industry", "target_name": "electronic music", "weight": 1.0, "year": 2009}, {"source": "37", "target": "44", "source_name": "middle ages", "target_name": "alternative rock", "weight": 1.0, "year": 2009}, {"source": "37", "target": "58", "source_name": "middle ages", "target_name": "music therapy", "weight": 1.0, "year": 2009}, {"source": "37", "target": "61", "source_name": "middle ages", "target_name": "progressive rock", "weight": 1.0, "year": 2009}, {"source": "37", "target": "69", "source_name": "middle ages", "target_name": "classical music", "weight": 1.0, "year": 2009}, {"source": "37", "target": "77", "source_name": "middle ages", "target_name": "rock music", "weight": 2.0, "year": 2009}, {"source": "37", "target": "80", "source_name": "middle ages", "target_name": "folk music", "weight": 2.0, "year": 2009}, {"source": "38", "target": "40", "source_name": "summary additional listening", "target_name": "musical instruments", "weight": 1.0, "year": 2009}, {"source": "38", "target": "52", "source_name": "summary additional listening", "target_name": "folk song", "weight": 1.0, "year": 2009}, {"source": "38", "target": "53", "source_name": "summary additional listening", "target_name": "popular music", "weight": 1.0, "year": 2009}, {"source": "38", "target": "54", "source_name": "summary additional listening", "target_name": "american popular music", "weight": 1.0, "year": 2009}, {"source": "38", "target": "65", "source_name": "summary additional listening", "target_name": "country music", "weight": 1.0, "year": 2009}, {"source": "38", "target": "69", "source_name": "summary additional listening", "target_name": "classical music", "weight": 1.0, "year": 2009}, {"source": "38", "target": "74", "source_name": "summary additional listening", "target_name": "united states", "weight": 1.0, "year": 2009}, {"source": "38", "target": "80", "source_name": "summary additional listening", "target_name": "folk music", "weight": 1.0, "year": 2009}, {"source": "38", "target": "89", "source_name": "summary additional listening", "target_name": "electronic music", "weight": 1.0, "year": 2009}, {"source": "40", "target": "43", "source_name": "musical instruments", "target_name": "music education", "weight": 1.0, "year": 2009}, {"source": "40", "target": "49", "source_name": "musical instruments", "target_name": "music theory", "weight": 1.0, "year": 2009}, {"source": "40", "target": "52", "source_name": "musical instruments", "target_name": "folk song", "weight": 1.0, "year": 2009}, {"source": "40", "target": "53", "source_name": "musical instruments", "target_name": "popular music", "weight": 2.0, "year": 2009}, {"source": "40", "target": "54", "source_name": "musical instruments", "target_name": "american popular music", "weight": 2.0, "year": 2009}, {"source": "40", "target": "65", "source_name": "musical instruments", "target_name": "country music", "weight": 1.0, "year": 2009}, {"source": "40", "target": "69", "source_name": "musical instruments", "target_name": "classical music", "weight": 1.0, "year": 2009}, {"source": "40", "target": "70", "source_name": "musical instruments", "target_name": "world war", "weight": 1.0, "year": 2009}, {"source": "40", "target": "74", "source_name": "musical instruments", "target_name": "united states", "weight": 2.0, "year": 2009}, {"source": "40", "target": "75", "source_name": "musical instruments", "target_name": "world war ii", "weight": 1.0, "year": 2009}, {"source": "40", "target": "80", "source_name": "musical instruments", "target_name": "folk music", "weight": 1.0, "year": 2009}, {"source": "40", "target": "89", "source_name": "musical instruments", "target_name": "electronic music", "weight": 2.0, "year": 2009}, {"source": "41", "target": "48", "source_name": "youth culture", "target_name": "pop music", "weight": 4.0, "year": 2009}, {"source": "41", "target": "51", "source_name": "youth culture", "target_name": "cultural identity", "weight": 2.0, "year": 2009}, {"source": "41", "target": "53", "source_name": "youth culture", "target_name": "popular music", "weight": 3.0, "year": 2009}, {"source": "41", "target": "60", "source_name": "youth culture", "target_name": "cultural studies", "weight": 2.0, "year": 2009}, {"source": "41", "target": "66", "source_name": "youth culture", "target_name": "hong kong", "weight": 1.0, "year": 2009}, {"source": "41", "target": "74", "source_name": "youth culture", "target_name": "united states", "weight": 1.0, "year": 2009}, {"source": "41", "target": "75", "source_name": "youth culture", "target_name": "world war ii", "weight": 1.0, "year": 2009}, {"source": "41", "target": "77", "source_name": "youth culture", "target_name": "rock music", "weight": 5.0, "year": 2009}, {"source": "42", "target": "47", "source_name": "simon frith", "target_name": "hard rock", "weight": 1.0, "year": 2009}, {"source": "42", "target": "48", "source_name": "simon frith", "target_name": "pop music", "weight": 6.0, "year": 2009}, {"source": "42", "target": "51", "source_name": "simon frith", "target_name": "cultural identity", "weight": 1.0, "year": 2009}, {"source": "42", "target": "53", "source_name": "simon frith", "target_name": "popular music", "weight": 4.0, "year": 2009}, {"source": "42", "target": "55", "source_name": "simon frith", "target_name": "rock criticism", "weight": 2.0, "year": 2009}, {"source": "42", "target": "56", "source_name": "simon frith", "target_name": "bruce springsteen", "weight": 1.0, "year": 2009}, {"source": "42", "target": "57", "source_name": "simon frith", "target_name": "north america", "weight": 1.0, "year": 2009}, {"source": "42", "target": "60", "source_name": "simon frith", "target_name": "cultural studies", "weight": 1.0, "year": 2009}, {"source": "42", "target": "65", "source_name": "simon frith", "target_name": "country music", "weight": 1.0, "year": 2009}, {"source": "42", "target": "72", "source_name": "simon frith", "target_name": "jimi hendrix", "weight": 1.0, "year": 2009}, {"source": "42", "target": "76", "source_name": "simon frith", "target_name": "los angeles", "weight": 1.0, "year": 2009}, {"source": "42", "target": "77", "source_name": "simon frith", "target_name": "rock music", "weight": 2.0, "year": 2009}, {"source": "42", "target": "78", "source_name": "simon frith", "target_name": "hip hop", "weight": 1.0, "year": 2009}, {"source": "42", "target": "79", "source_name": "simon frith", "target_name": "popular culture", "weight": 1.0, "year": 2009}, {"source": "42", "target": "82", "source_name": "simon frith", "target_name": "heavy metal", "weight": 1.0, "year": 2009}, {"source": "43", "target": "48", "source_name": "music education", "target_name": "pop music", "weight": 2.0, "year": 2009}, {"source": "43", "target": "49", "source_name": "music education", "target_name": "music theory", "weight": 2.0, "year": 2009}, {"source": "43", "target": "52", "source_name": "music education", "target_name": "folk song", "weight": 1.0, "year": 2009}, {"source": "43", "target": "53", "source_name": "music education", "target_name": "popular music", "weight": 4.0, "year": 2009}, {"source": "43", "target": "57", "source_name": "music education", "target_name": "north america", "weight": 1.0, "year": 2009}, {"source": "43", "target": "60", "source_name": "music education", "target_name": "cultural studies", "weight": 1.0, "year": 2009}, {"source": "43", "target": "66", "source_name": "music education", "target_name": "hong kong", "weight": 1.0, "year": 2009}, {"source": "43", "target": "69", "source_name": "music education", "target_name": "classical music", "weight": 2.0, "year": 2009}, {"source": "43", "target": "74", "source_name": "music education", "target_name": "united states", "weight": 1.0, "year": 2009}, {"source": "43", "target": "77", "source_name": "music education", "target_name": "rock music", "weight": 2.0, "year": 2009}, {"source": "43", "target": "80", "source_name": "music education", "target_name": "folk music", "weight": 4.0, "year": 2009}, {"source": "44", "target": "48", "source_name": "alternative rock", "target_name": "pop music", "weight": 1.0, "year": 2009}, {"source": "44", "target": "53", "source_name": "alternative rock", "target_name": "popular music", "weight": 7.0, "year": 2009}, {"source": "44", "target": "57", "source_name": "alternative rock", "target_name": "north america", "weight": 3.0, "year": 2009}, {"source": "44", "target": "61", "source_name": "alternative rock", "target_name": "progressive rock", "weight": 1.0, "year": 2009}, {"source": "44", "target": "65", "source_name": "alternative rock", "target_name": "country music", "weight": 2.0, "year": 2009}, {"source": "44", "target": "67", "source_name": "alternative rock", "target_name": "rock art", "weight": 1.0, "year": 2009}, {"source": "44", "target": "73", "source_name": "alternative rock", "target_name": "southern rock", "weight": 1.0, "year": 2009}, {"source": "44", "target": "74", "source_name": "alternative rock", "target_name": "united states", "weight": 2.0, "year": 2009}, {"source": "44", "target": "77", "source_name": "alternative rock", "target_name": "rock music", "weight": 5.0, "year": 2009}, {"source": "44", "target": "78", "source_name": "alternative rock", "target_name": "hip hop", "weight": 1.0, "year": 2009}, {"source": "44", "target": "80", "source_name": "alternative rock", "target_name": "folk music", "weight": 1.0, "year": 2009}, {"source": "46", "target": "48", "source_name": "music festival", "target_name": "pop music", "weight": 2.0, "year": 2009}, {"source": "46", "target": "77", "source_name": "music festival", "target_name": "rock music", "weight": 1.0, "year": 2009}, {"source": "46", "target": "80", "source_name": "music festival", "target_name": "folk music", "weight": 1.0, "year": 2009}, {"source": "47", "target": "48", "source_name": "hard rock", "target_name": "pop music", "weight": 2.0, "year": 2009}, {"source": "47", "target": "53", "source_name": "hard rock", "target_name": "popular music", "weight": 4.0, "year": 2009}, {"source": "47", "target": "56", "source_name": "hard rock", "target_name": "bruce springsteen", "weight": 1.0, "year": 2009}, {"source": "47", "target": "57", "source_name": "hard rock", "target_name": "north america", "weight": 1.0, "year": 2009}, {"source": "47", "target": "65", "source_name": "hard rock", "target_name": "country music", "weight": 1.0, "year": 2009}, {"source": "47", "target": "69", "source_name": "hard rock", "target_name": "classical music", "weight": 2.0, "year": 2009}, {"source": "47", "target": "77", "source_name": "hard rock", "target_name": "rock music", "weight": 8.0, "year": 2009}, {"source": "47", "target": "78", "source_name": "hard rock", "target_name": "hip hop", "weight": 1.0, "year": 2009}, {"source": "47", "target": "79", "source_name": "hard rock", "target_name": "popular culture", "weight": 2.0, "year": 2009}, {"source": "47", "target": "82", "source_name": "hard rock", "target_name": "heavy metal", "weight": 4.0, "year": 2009}, {"source": "47", "target": "89", "source_name": "hard rock", "target_name": "electronic music", "weight": 1.0, "year": 2009}, {"source": "48", "target": "51", "source_name": "pop music", "target_name": "cultural identity", "weight": 3.0, "year": 2009}, {"source": "48", "target": "52", "source_name": "pop music", "target_name": "folk song", "weight": 2.0, "year": 2009}, {"source": "48", "target": "53", "source_name": "pop music", "target_name": "popular music", "weight": 23.0, "year": 2009}, {"source": "48", "target": "55", "source_name": "pop music", "target_name": "rock criticism", "weight": 2.0, "year": 2009}, {"source": "48", "target": "57", "source_name": "pop music", "target_name": "north america", "weight": 2.0, "year": 2009}, {"source": "48", "target": "60", "source_name": "pop music", "target_name": "cultural studies", "weight": 1.0, "year": 2009}, {"source": "48", "target": "64", "source_name": "pop music", "target_name": "english language", "weight": 1.0, "year": 2009}, {"source": "48", "target": "65", "source_name": "pop music", "target_name": "country music", "weight": 1.0, "year": 2009}, {"source": "48", "target": "66", "source_name": "pop music", "target_name": "hong kong", "weight": 3.0, "year": 2009}, {"source": "48", "target": "67", "source_name": "pop music", "target_name": "rock art", "weight": 2.0, "year": 2009}, {"source": "48", "target": "69", "source_name": "pop music", "target_name": "classical music", "weight": 2.0, "year": 2009}, {"source": "48", "target": "70", "source_name": "pop music", "target_name": "world war", "weight": 2.0, "year": 2009}, {"source": "48", "target": "71", "source_name": "pop music", "target_name": "latin american", "weight": 1.0, "year": 2009}, {"source": "48", "target": "72", "source_name": "pop music", "target_name": "jimi hendrix", "weight": 2.0, "year": 2009}, {"source": "48", "target": "74", "source_name": "pop music", "target_name": "united states", "weight": 4.0, "year": 2009}, {"source": "48", "target": "76", "source_name": "pop music", "target_name": "los angeles", "weight": 1.0, "year": 2009}, {"source": "48", "target": "77", "source_name": "pop music", "target_name": "rock music", "weight": 22.0, "year": 2009}, {"source": "48", "target": "78", "source_name": "pop music", "target_name": "hip hop", "weight": 1.0, "year": 2009}, {"source": "48", "target": "79", "source_name": "pop music", "target_name": "popular culture", "weight": 2.0, "year": 2009}, {"source": "48", "target": "80", "source_name": "pop music", "target_name": "folk music", "weight": 3.0, "year": 2009}, {"source": "48", "target": "82", "source_name": "pop music", "target_name": "heavy metal", "weight": 2.0, "year": 2009}, {"source": "48", "target": "83", "source_name": "pop music", "target_name": "folk rock", "weight": 1.0, "year": 2009}, {"source": "49", "target": "53", "source_name": "music theory", "target_name": "popular music", "weight": 4.0, "year": 2009}, {"source": "49", "target": "54", "source_name": "music theory", "target_name": "american popular music", "weight": 1.0, "year": 2009}, {"source": "49", "target": "55", "source_name": "music theory", "target_name": "rock criticism", "weight": 1.0, "year": 2009}, {"source": "49", "target": "57", "source_name": "music theory", "target_name": "north america", "weight": 2.0, "year": 2009}, {"source": "49", "target": "69", "source_name": "music theory", "target_name": "classical music", "weight": 1.0, "year": 2009}, {"source": "49", "target": "72", "source_name": "music theory", "target_name": "jimi hendrix", "weight": 1.0, "year": 2009}, {"source": "49", "target": "77", "source_name": "music theory", "target_name": "rock music", "weight": 2.0, "year": 2009}, {"source": "49", "target": "78", "source_name": "music theory", "target_name": "hip hop", "weight": 1.0, "year": 2009}, {"source": "49", "target": "88", "source_name": "music theory", "target_name": "oxford university press", "weight": 1.0, "year": 2009}, {"source": "49", "target": "89", "source_name": "music theory", "target_name": "electronic music", "weight": 1.0, "year": 2009}, {"source": "50", "target": "53", "source_name": "hollywood film", "target_name": "popular music", "weight": 1.0, "year": 2009}, {"source": "50", "target": "79", "source_name": "hollywood film", "target_name": "popular culture", "weight": 1.0, "year": 2009}, {"source": "51", "target": "52", "source_name": "cultural identity", "target_name": "folk song", "weight": 1.0, "year": 2009}, {"source": "51", "target": "53", "source_name": "cultural identity", "target_name": "popular music", "weight": 2.0, "year": 2009}, {"source": "51", "target": "60", "source_name": "cultural identity", "target_name": "cultural studies", "weight": 2.0, "year": 2009}, {"source": "51", "target": "65", "source_name": "cultural identity", "target_name": "country music", "weight": 1.0, "year": 2009}, {"source": "51", "target": "66", "source_name": "cultural identity", "target_name": "hong kong", "weight": 1.0, "year": 2009}, {"source": "51", "target": "72", "source_name": "cultural identity", "target_name": "jimi hendrix", "weight": 2.0, "year": 2009}, {"source": "51", "target": "74", "source_name": "cultural identity", "target_name": "united states", "weight": 2.0, "year": 2009}, {"source": "51", "target": "77", "source_name": "cultural identity", "target_name": "rock music", "weight": 6.0, "year": 2009}, {"source": "51", "target": "79", "source_name": "cultural identity", "target_name": "popular culture", "weight": 2.0, "year": 2009}, {"source": "52", "target": "53", "source_name": "folk song", "target_name": "popular music", "weight": 7.0, "year": 2009}, {"source": "52", "target": "54", "source_name": "folk song", "target_name": "american popular music", "weight": 1.0, "year": 2009}, {"source": "52", "target": "65", "source_name": "folk song", "target_name": "country music", "weight": 1.0, "year": 2009}, {"source": "52", "target": "66", "source_name": "folk song", "target_name": "hong kong", "weight": 1.0, "year": 2009}, {"source": "52", "target": "69", "source_name": "folk song", "target_name": "classical music", "weight": 2.0, "year": 2009}, {"source": "52", "target": "74", "source_name": "folk song", "target_name": "united states", "weight": 1.0, "year": 2009}, {"source": "52", "target": "77", "source_name": "folk song", "target_name": "rock music", "weight": 3.0, "year": 2009}, {"source": "52", "target": "80", "source_name": "folk song", "target_name": "folk music", "weight": 6.0, "year": 2009}, {"source": "52", "target": "87", "source_name": "folk song", "target_name": "music hall", "weight": 1.0, "year": 2009}, {"source": "52", "target": "89", "source_name": "folk song", "target_name": "electronic music", "weight": 1.0, "year": 2009}, {"source": "53", "target": "54", "source_name": "popular music", "target_name": "american popular music", "weight": 9.0, "year": 2009}, {"source": "53", "target": "55", "source_name": "popular music", "target_name": "rock criticism", "weight": 3.0, "year": 2009}, {"source": "53", "target": "56", "source_name": "popular music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2009}, {"source": "53", "target": "57", "source_name": "popular music", "target_name": "north america", "weight": 6.0, "year": 2009}, {"source": "53", "target": "58", "source_name": "popular music", "target_name": "music therapy", "weight": 1.0, "year": 2009}, {"source": "53", "target": "59", "source_name": "popular music", "target_name": "college students", "weight": 3.0, "year": 2009}, {"source": "53", "target": "60", "source_name": "popular music", "target_name": "cultural studies", "weight": 5.0, "year": 2009}, {"source": "53", "target": "61", "source_name": "popular music", "target_name": "progressive rock", "weight": 6.0, "year": 2009}, {"source": "53", "target": "62", "source_name": "popular music", "target_name": "led zeppelin", "weight": 2.0, "year": 2009}, {"source": "53", "target": "65", "source_name": "popular music", "target_name": "country music", "weight": 10.0, "year": 2009}, {"source": "53", "target": "66", "source_name": "popular music", "target_name": "hong kong", "weight": 2.0, "year": 2009}, {"source": "53", "target": "67", "source_name": "popular music", "target_name": "rock art", "weight": 4.0, "year": 2009}, {"source": "53", "target": "69", "source_name": "popular music", "target_name": "classical music", "weight": 9.0, "year": 2009}, {"source": "53", "target": "70", "source_name": "popular music", "target_name": "world war", "weight": 5.0, "year": 2009}, {"source": "53", "target": "71", "source_name": "popular music", "target_name": "latin american", "weight": 2.0, "year": 2009}, {"source": "53", "target": "72", "source_name": "popular music", "target_name": "jimi hendrix", "weight": 4.0, "year": 2009}, {"source": "53", "target": "73", "source_name": "popular music", "target_name": "southern rock", "weight": 2.0, "year": 2009}, {"source": "53", "target": "74", "source_name": "popular music", "target_name": "united states", "weight": 13.0, "year": 2009}, {"source": "53", "target": "75", "source_name": "popular music", "target_name": "world war ii", "weight": 3.0, "year": 2009}, {"source": "53", "target": "76", "source_name": "popular music", "target_name": "los angeles", "weight": 6.0, "year": 2009}, {"source": "53", "target": "77", "source_name": "popular music", "target_name": "rock music", "weight": 81.0, "year": 2009}, {"source": "53", "target": "78", "source_name": "popular music", "target_name": "hip hop", "weight": 8.0, "year": 2009}, {"source": "53", "target": "79", "source_name": "popular music", "target_name": "popular culture", "weight": 14.0, "year": 2009}, {"source": "53", "target": "80", "source_name": "popular music", "target_name": "folk music", "weight": 13.0, "year": 2009}, {"source": "53", "target": "82", "source_name": "popular music", "target_name": "heavy metal", "weight": 8.0, "year": 2009}, {"source": "53", "target": "83", "source_name": "popular music", "target_name": "folk rock", "weight": 1.0, "year": 2009}, {"source": "53", "target": "85", "source_name": "popular music", "target_name": "jewish music", "weight": 1.0, "year": 2009}, {"source": "53", "target": "87", "source_name": "popular music", "target_name": "music hall", "weight": 2.0, "year": 2009}, {"source": "53", "target": "88", "source_name": "popular music", "target_name": "oxford university press", "weight": 3.0, "year": 2009}, {"source": "53", "target": "89", "source_name": "popular music", "target_name": "electronic music", "weight": 3.0, "year": 2009}, {"source": "54", "target": "55", "source_name": "american popular music", "target_name": "rock criticism", "weight": 1.0, "year": 2009}, {"source": "54", "target": "65", "source_name": "american popular music", "target_name": "country music", "weight": 4.0, "year": 2009}, {"source": "54", "target": "69", "source_name": "american popular music", "target_name": "classical music", "weight": 3.0, "year": 2009}, {"source": "54", "target": "71", "source_name": "american popular music", "target_name": "latin american", "weight": 1.0, "year": 2009}, {"source": "54", "target": "74", "source_name": "american popular music", "target_name": "united states", "weight": 4.0, "year": 2009}, {"source": "54", "target": "76", "source_name": "american popular music", "target_name": "los angeles", "weight": 1.0, "year": 2009}, {"source": "54", "target": "77", "source_name": "american popular music", "target_name": "rock music", "weight": 1.0, "year": 2009}, {"source": "54", "target": "78", "source_name": "american popular music", "target_name": "hip hop", "weight": 1.0, "year": 2009}, {"source": "54", "target": "79", "source_name": "american popular music", "target_name": "popular culture", "weight": 1.0, "year": 2009}, {"source": "54", "target": "80", "source_name": "american popular music", "target_name": "folk music", "weight": 1.0, "year": 2009}, {"source": "54", "target": "88", "source_name": "american popular music", "target_name": "oxford university press", "weight": 1.0, "year": 2009}, {"source": "54", "target": "89", "source_name": "american popular music", "target_name": "electronic music", "weight": 1.0, "year": 2009}, {"source": "55", "target": "57", "source_name": "rock criticism", "target_name": "north america", "weight": 1.0, "year": 2009}, {"source": "55", "target": "61", "source_name": "rock criticism", "target_name": "progressive rock", "weight": 2.0, "year": 2009}, {"source": "55", "target": "65", "source_name": "rock criticism", "target_name": "country music", "weight": 1.0, "year": 2009}, {"source": "55", "target": "69", "source_name": "rock criticism", "target_name": "classical music", "weight": 1.0, "year": 2009}, {"source": "55", "target": "74", "source_name": "rock criticism", "target_name": "united states", "weight": 1.0, "year": 2009}, {"source": "55", "target": "77", "source_name": "rock criticism", "target_name": "rock music", "weight": 3.0, "year": 2009}, {"source": "55", "target": "78", "source_name": "rock criticism", "target_name": "hip hop", "weight": 1.0, "year": 2009}, {"source": "55", "target": "88", "source_name": "rock criticism", "target_name": "oxford university press", "weight": 1.0, "year": 2009}, {"source": "56", "target": "72", "source_name": "bruce springsteen", "target_name": "jimi hendrix", "weight": 1.0, "year": 2009}, {"source": "56", "target": "77", "source_name": "bruce springsteen", "target_name": "rock music", "weight": 2.0, "year": 2009}, {"source": "56", "target": "78", "source_name": "bruce springsteen", "target_name": "hip hop", "weight": 1.0, "year": 2009}, {"source": "56", "target": "79", "source_name": "bruce springsteen", "target_name": "popular culture", "weight": 1.0, "year": 2009}, {"source": "56", "target": "82", "source_name": "bruce springsteen", "target_name": "heavy metal", "weight": 1.0, "year": 2009}, {"source": "57", "target": "61", "source_name": "north america", "target_name": "progressive rock", "weight": 1.0, "year": 2009}, {"source": "57", "target": "65", "source_name": "north america", "target_name": "country music", "weight": 2.0, "year": 2009}, {"source": "57", "target": "71", "source_name": "north america", "target_name": "latin american", "weight": 1.0, "year": 2009}, {"source": "57", "target": "73", "source_name": "north america", "target_name": "southern rock", "weight": 1.0, "year": 2009}, {"source": "57", "target": "74", "source_name": "north america", "target_name": "united states", "weight": 3.0, "year": 2009}, {"source": "57", "target": "77", "source_name": "north america", "target_name": "rock music", "weight": 4.0, "year": 2009}, {"source": "57", "target": "78", "source_name": "north america", "target_name": "hip hop", "weight": 1.0, "year": 2009}, {"source": "57", "target": "80", "source_name": "north america", "target_name": "folk music", "weight": 2.0, "year": 2009}, {"source": "58", "target": "64", "source_name": "music therapy", "target_name": "english language", "weight": 1.0, "year": 2009}, {"source": "58", "target": "77", "source_name": "music therapy", "target_name": "rock music", "weight": 3.0, "year": 2009}, {"source": "59", "target": "74", "source_name": "college students", "target_name": "united states", "weight": 1.0, "year": 2009}, {"source": "59", "target": "77", "source_name": "college students", "target_name": "rock music", "weight": 1.0, "year": 2009}, {"source": "59", "target": "82", "source_name": "college students", "target_name": "heavy metal", "weight": 1.0, "year": 2009}, {"source": "60", "target": "62", "source_name": "cultural studies", "target_name": "led zeppelin", "weight": 1.0, "year": 2009}, {"source": "60", "target": "71", "source_name": "cultural studies", "target_name": "latin american", "weight": 1.0, "year": 2009}, {"source": "60", "target": "76", "source_name": "cultural studies", "target_name": "los angeles", "weight": 1.0, "year": 2009}, {"source": "60", "target": "77", "source_name": "cultural studies", "target_name": "rock music", "weight": 5.0, "year": 2009}, {"source": "60", "target": "79", "source_name": "cultural studies", "target_name": "popular culture", "weight": 4.0, "year": 2009}, {"source": "60", "target": "80", "source_name": "cultural studies", "target_name": "folk music", "weight": 1.0, "year": 2009}, {"source": "60", "target": "85", "source_name": "cultural studies", "target_name": "jewish music", "weight": 1.0, "year": 2009}, {"source": "60", "target": "87", "source_name": "cultural studies", "target_name": "music hall", "weight": 1.0, "year": 2009}, {"source": "60", "target": "88", "source_name": "cultural studies", "target_name": "oxford university press", "weight": 2.0, "year": 2009}, {"source": "61", "target": "69", "source_name": "progressive rock", "target_name": "classical music", "weight": 2.0, "year": 2009}, {"source": "61", "target": "72", "source_name": "progressive rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2009}, {"source": "61", "target": "74", "source_name": "progressive rock", "target_name": "united states", "weight": 1.0, "year": 2009}, {"source": "61", "target": "77", "source_name": "progressive rock", "target_name": "rock music", "weight": 14.0, "year": 2009}, {"source": "61", "target": "80", "source_name": "progressive rock", "target_name": "folk music", "weight": 1.0, "year": 2009}, {"source": "61", "target": "82", "source_name": "progressive rock", "target_name": "heavy metal", "weight": 1.0, "year": 2009}, {"source": "61", "target": "89", "source_name": "progressive rock", "target_name": "electronic music", "weight": 1.0, "year": 2009}, {"source": "62", "target": "77", "source_name": "led zeppelin", "target_name": "rock music", "weight": 1.0, "year": 2009}, {"source": "62", "target": "88", "source_name": "led zeppelin", "target_name": "oxford university press", "weight": 1.0, "year": 2009}, {"source": "64", "target": "70", "source_name": "english language", "target_name": "world war", "weight": 1.0, "year": 2009}, {"source": "64", "target": "74", "source_name": "english language", "target_name": "united states", "weight": 1.0, "year": 2009}, {"source": "64", "target": "77", "source_name": "english language", "target_name": "rock music", "weight": 2.0, "year": 2009}, {"source": "64", "target": "79", "source_name": "english language", "target_name": "popular culture", "weight": 1.0, "year": 2009}, {"source": "65", "target": "69", "source_name": "country music", "target_name": "classical music", "weight": 3.0, "year": 2009}, {"source": "65", "target": "72", "source_name": "country music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2009}, {"source": "65", "target": "73", "source_name": "country music", "target_name": "southern rock", "weight": 2.0, "year": 2009}, {"source": "65", "target": "74", "source_name": "country music", "target_name": "united states", "weight": 3.0, "year": 2009}, {"source": "65", "target": "77", "source_name": "country music", "target_name": "rock music", "weight": 4.0, "year": 2009}, {"source": "65", "target": "79", "source_name": "country music", "target_name": "popular culture", "weight": 2.0, "year": 2009}, {"source": "65", "target": "80", "source_name": "country music", "target_name": "folk music", "weight": 3.0, "year": 2009}, {"source": "65", "target": "82", "source_name": "country music", "target_name": "heavy metal", "weight": 1.0, "year": 2009}, {"source": "65", "target": "89", "source_name": "country music", "target_name": "electronic music", "weight": 2.0, "year": 2009}, {"source": "66", "target": "77", "source_name": "hong kong", "target_name": "rock music", "weight": 2.0, "year": 2009}, {"source": "67", "target": "77", "source_name": "rock art", "target_name": "rock music", "weight": 4.0, "year": 2009}, {"source": "67", "target": "79", "source_name": "rock art", "target_name": "popular culture", "weight": 1.0, "year": 2009}, {"source": "68", "target": "77", "source_name": "hearing loss", "target_name": "rock music", "weight": 3.0, "year": 2009}, {"source": "69", "target": "71", "source_name": "classical music", "target_name": "latin american", "weight": 1.0, "year": 2009}, {"source": "69", "target": "72", "source_name": "classical music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2009}, {"source": "69", "target": "74", "source_name": "classical music", "target_name": "united states", "weight": 4.0, "year": 2009}, {"source": "69", "target": "76", "source_name": "classical music", "target_name": "los angeles", "weight": 1.0, "year": 2009}, {"source": "69", "target": "77", "source_name": "classical music", "target_name": "rock music", "weight": 22.0, "year": 2009}, {"source": "69", "target": "78", "source_name": "classical music", "target_name": "hip hop", "weight": 2.0, "year": 2009}, {"source": "69", "target": "79", "source_name": "classical music", "target_name": "popular culture", "weight": 2.0, "year": 2009}, {"source": "69", "target": "80", "source_name": "classical music", "target_name": "folk music", "weight": 3.0, "year": 2009}, {"source": "69", "target": "82", "source_name": "classical music", "target_name": "heavy metal", "weight": 3.0, "year": 2009}, {"source": "69", "target": "87", "source_name": "classical music", "target_name": "music hall", "weight": 1.0, "year": 2009}, {"source": "69", "target": "88", "source_name": "classical music", "target_name": "oxford university press", "weight": 1.0, "year": 2009}, {"source": "69", "target": "89", "source_name": "classical music", "target_name": "electronic music", "weight": 2.0, "year": 2009}, {"source": "70", "target": "74", "source_name": "world war", "target_name": "united states", "weight": 2.0, "year": 2009}, {"source": "70", "target": "75", "source_name": "world war", "target_name": "world war ii", "weight": 3.0, "year": 2009}, {"source": "70", "target": "77", "source_name": "world war", "target_name": "rock music", "weight": 5.0, "year": 2009}, {"source": "70", "target": "79", "source_name": "world war", "target_name": "popular culture", "weight": 1.0, "year": 2009}, {"source": "70", "target": "80", "source_name": "world war", "target_name": "folk music", "weight": 1.0, "year": 2009}, {"source": "70", "target": "87", "source_name": "world war", "target_name": "music hall", "weight": 1.0, "year": 2009}, {"source": "70", "target": "89", "source_name": "world war", "target_name": "electronic music", "weight": 1.0, "year": 2009}, {"source": "71", "target": "74", "source_name": "latin american", "target_name": "united states", "weight": 3.0, "year": 2009}, {"source": "71", "target": "76", "source_name": "latin american", "target_name": "los angeles", "weight": 2.0, "year": 2009}, {"source": "71", "target": "77", "source_name": "latin american", "target_name": "rock music", "weight": 4.0, "year": 2009}, {"source": "71", "target": "79", "source_name": "latin american", "target_name": "popular culture", "weight": 1.0, "year": 2009}, {"source": "72", "target": "74", "source_name": "jimi hendrix", "target_name": "united states", "weight": 1.0, "year": 2009}, {"source": "72", "target": "77", "source_name": "jimi hendrix", "target_name": "rock music", "weight": 5.0, "year": 2009}, {"source": "72", "target": "79", "source_name": "jimi hendrix", "target_name": "popular culture", "weight": 2.0, "year": 2009}, {"source": "72", "target": "80", "source_name": "jimi hendrix", "target_name": "folk music", "weight": 1.0, "year": 2009}, {"source": "72", "target": "89", "source_name": "jimi hendrix", "target_name": "electronic music", "weight": 1.0, "year": 2009}, {"source": "73", "target": "77", "source_name": "southern rock", "target_name": "rock music", "weight": 1.0, "year": 2009}, {"source": "73", "target": "80", "source_name": "southern rock", "target_name": "folk music", "weight": 1.0, "year": 2009}, {"source": "74", "target": "76", "source_name": "united states", "target_name": "los angeles", "weight": 1.0, "year": 2009}, {"source": "74", "target": "77", "source_name": "united states", "target_name": "rock music", "weight": 9.0, "year": 2009}, {"source": "74", "target": "78", "source_name": "united states", "target_name": "hip hop", "weight": 1.0, "year": 2009}, {"source": "74", "target": "79", "source_name": "united states", "target_name": "popular culture", "weight": 3.0, "year": 2009}, {"source": "74", "target": "80", "source_name": "united states", "target_name": "folk music", "weight": 3.0, "year": 2009}, {"source": "74", "target": "89", "source_name": "united states", "target_name": "electronic music", "weight": 1.0, "year": 2009}, {"source": "75", "target": "77", "source_name": "world war ii", "target_name": "rock music", "weight": 1.0, "year": 2009}, {"source": "76", "target": "77", "source_name": "los angeles", "target_name": "rock music", "weight": 6.0, "year": 2009}, {"source": "76", "target": "79", "source_name": "los angeles", "target_name": "popular culture", "weight": 1.0, "year": 2009}, {"source": "77", "target": "78", "source_name": "rock music", "target_name": "hip hop", "weight": 3.0, "year": 2009}, {"source": "77", "target": "79", "source_name": "rock music", "target_name": "popular culture", "weight": 13.0, "year": 2009}, {"source": "77", "target": "80", "source_name": "rock music", "target_name": "folk music", "weight": 8.0, "year": 2009}, {"source": "77", "target": "82", "source_name": "rock music", "target_name": "heavy metal", "weight": 9.0, "year": 2009}, {"source": "77", "target": "87", "source_name": "rock music", "target_name": "music hall", "weight": 3.0, "year": 2009}, {"source": "77", "target": "88", "source_name": "rock music", "target_name": "oxford university press", "weight": 1.0, "year": 2009}, {"source": "77", "target": "89", "source_name": "rock music", "target_name": "electronic music", "weight": 3.0, "year": 2009}, {"source": "78", "target": "79", "source_name": "hip hop", "target_name": "popular culture", "weight": 2.0, "year": 2009}, {"source": "78", "target": "80", "source_name": "hip hop", "target_name": "folk music", "weight": 2.0, "year": 2009}, {"source": "78", "target": "82", "source_name": "hip hop", "target_name": "heavy metal", "weight": 2.0, "year": 2009}, {"source": "78", "target": "88", "source_name": "hip hop", "target_name": "oxford university press", "weight": 1.0, "year": 2009}, {"source": "79", "target": "80", "source_name": "popular culture", "target_name": "folk music", "weight": 2.0, "year": 2009}, {"source": "79", "target": "82", "source_name": "popular culture", "target_name": "heavy metal", "weight": 2.0, "year": 2009}, {"source": "79", "target": "85", "source_name": "popular culture", "target_name": "jewish music", "weight": 1.0, "year": 2009}, {"source": "79", "target": "87", "source_name": "popular culture", "target_name": "music hall", "weight": 2.0, "year": 2009}, {"source": "79", "target": "88", "source_name": "popular culture", "target_name": "oxford university press", "weight": 1.0, "year": 2009}, {"source": "80", "target": "85", "source_name": "folk music", "target_name": "jewish music", "weight": 1.0, "year": 2009}, {"source": "80", "target": "87", "source_name": "folk music", "target_name": "music hall", "weight": 1.0, "year": 2009}, {"source": "80", "target": "88", "source_name": "folk music", "target_name": "oxford university press", "weight": 1.0, "year": 2009}, {"source": "80", "target": "89", "source_name": "folk music", "target_name": "electronic music", "weight": 3.0, "year": 2009}, {"source": "85", "target": "88", "source_name": "jewish music", "target_name": "oxford university press", "weight": 1.0, "year": 2009}]}, {"2010": [{"source": "1", "target": "7", "source_name": "rock star", "target_name": "nineteenth century", "weight": 1.0, "year": 2010}, {"source": "1", "target": "9", "source_name": "rock star", "target_name": "compact disc", "weight": 1.0, "year": 2010}, {"source": "1", "target": "19", "source_name": "rock star", "target_name": "music video", "weight": 1.0, "year": 2010}, {"source": "1", "target": "28", "source_name": "rock star", "target_name": "high school", "weight": 1.0, "year": 2010}, {"source": "1", "target": "29", "source_name": "rock star", "target_name": "rolling stone", "weight": 1.0, "year": 2010}, {"source": "1", "target": "36", "source_name": "rock star", "target_name": "music industry", "weight": 2.0, "year": 2010}, {"source": "1", "target": "41", "source_name": "rock star", "target_name": "youth culture", "weight": 2.0, "year": 2010}, {"source": "1", "target": "48", "source_name": "rock star", "target_name": "pop music", "weight": 4.0, "year": 2010}, {"source": "1", "target": "51", "source_name": "rock star", "target_name": "cultural identity", "weight": 1.0, "year": 2010}, {"source": "1", "target": "53", "source_name": "rock star", "target_name": "popular music", "weight": 3.0, "year": 2010}, {"source": "1", "target": "69", "source_name": "rock star", "target_name": "classical music", "weight": 1.0, "year": 2010}, {"source": "1", "target": "74", "source_name": "rock star", "target_name": "united states", "weight": 1.0, "year": 2010}, {"source": "1", "target": "77", "source_name": "rock star", "target_name": "rock music", "weight": 7.0, "year": 2010}, {"source": "1", "target": "82", "source_name": "rock star", "target_name": "heavy metal", "weight": 2.0, "year": 2010}, {"source": "2", "target": "19", "source_name": "indie rock", "target_name": "music video", "weight": 1.0, "year": 2010}, {"source": "2", "target": "36", "source_name": "indie rock", "target_name": "music industry", "weight": 1.0, "year": 2010}, {"source": "2", "target": "48", "source_name": "indie rock", "target_name": "pop music", "weight": 2.0, "year": 2010}, {"source": "2", "target": "51", "source_name": "indie rock", "target_name": "cultural identity", "weight": 1.0, "year": 2010}, {"source": "2", "target": "53", "source_name": "indie rock", "target_name": "popular music", "weight": 2.0, "year": 2010}, {"source": "2", "target": "67", "source_name": "indie rock", "target_name": "rock art", "weight": 1.0, "year": 2010}, {"source": "2", "target": "72", "source_name": "indie rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2010}, {"source": "2", "target": "74", "source_name": "indie rock", "target_name": "united states", "weight": 1.0, "year": 2010}, {"source": "2", "target": "77", "source_name": "indie rock", "target_name": "rock music", "weight": 4.0, "year": 2010}, {"source": "2", "target": "78", "source_name": "indie rock", "target_name": "hip hop", "weight": 1.0, "year": 2010}, {"source": "2", "target": "80", "source_name": "indie rock", "target_name": "folk music", "weight": 1.0, "year": 2010}, {"source": "3", "target": "79", "source_name": "glam rock", "target_name": "popular culture", "weight": 1.0, "year": 2010}, {"source": "4", "target": "7", "source_name": "gregorian chant", "target_name": "nineteenth century", "weight": 1.0, "year": 2010}, {"source": "4", "target": "9", "source_name": "gregorian chant", "target_name": "compact disc", "weight": 1.0, "year": 2010}, {"source": "4", "target": "10", "source_name": "gregorian chant", "target_name": "african american", "weight": 1.0, "year": 2010}, {"source": "4", "target": "19", "source_name": "gregorian chant", "target_name": "music video", "weight": 1.0, "year": 2010}, {"source": "4", "target": "22", "source_name": "gregorian chant", "target_name": "chamber music", "weight": 1.0, "year": 2010}, {"source": "4", "target": "36", "source_name": "gregorian chant", "target_name": "music industry", "weight": 1.0, "year": 2010}, {"source": "4", "target": "37", "source_name": "gregorian chant", "target_name": "middle ages", "weight": 1.0, "year": 2010}, {"source": "4", "target": "38", "source_name": "gregorian chant", "target_name": "summary additional listening", "weight": 1.0, "year": 2010}, {"source": "4", "target": "40", "source_name": "gregorian chant", "target_name": "musical instruments", "weight": 1.0, "year": 2010}, {"source": "4", "target": "48", "source_name": "gregorian chant", "target_name": "pop music", "weight": 1.0, "year": 2010}, {"source": "4", "target": "52", "source_name": "gregorian chant", "target_name": "folk song", "weight": 1.0, "year": 2010}, {"source": "4", "target": "53", "source_name": "gregorian chant", "target_name": "popular music", "weight": 1.0, "year": 2010}, {"source": "4", "target": "54", "source_name": "gregorian chant", "target_name": "american popular music", "weight": 1.0, "year": 2010}, {"source": "4", "target": "65", "source_name": "gregorian chant", "target_name": "country music", "weight": 1.0, "year": 2010}, {"source": "4", "target": "69", "source_name": "gregorian chant", "target_name": "classical music", "weight": 1.0, "year": 2010}, {"source": "4", "target": "74", "source_name": "gregorian chant", "target_name": "united states", "weight": 1.0, "year": 2010}, {"source": "4", "target": "80", "source_name": "gregorian chant", "target_name": "folk music", "weight": 1.0, "year": 2010}, {"source": "4", "target": "89", "source_name": "gregorian chant", "target_name": "electronic music", "weight": 1.0, "year": 2010}, {"source": "5", "target": "12", "source_name": "jesus christ superstar", "target_name": "rock opera", "weight": 2.0, "year": 2010}, {"source": "5", "target": "15", "source_name": "jesus christ superstar", "target_name": "musical theatre", "weight": 2.0, "year": 2010}, {"source": "5", "target": "33", "source_name": "jesus christ superstar", "target_name": "jesus christ", "weight": 3.0, "year": 2010}, {"source": "5", "target": "34", "source_name": "jesus christ superstar", "target_name": "mass media", "weight": 1.0, "year": 2010}, {"source": "5", "target": "41", "source_name": "jesus christ superstar", "target_name": "youth culture", "weight": 1.0, "year": 2010}, {"source": "5", "target": "53", "source_name": "jesus christ superstar", "target_name": "popular music", "weight": 1.0, "year": 2010}, {"source": "5", "target": "77", "source_name": "jesus christ superstar", "target_name": "rock music", "weight": 5.0, "year": 2010}, {"source": "6", "target": "10", "source_name": "elvis presley", "target_name": "african american", "weight": 1.0, "year": 2010}, {"source": "6", "target": "16", "source_name": "elvis presley", "target_name": "bob dylan", "weight": 3.0, "year": 2010}, {"source": "6", "target": "17", "source_name": "elvis presley", "target_name": "civil rights", "weight": 1.0, "year": 2010}, {"source": "6", "target": "23", "source_name": "elvis presley", "target_name": "electronic dance music", "weight": 1.0, "year": 2010}, {"source": "6", "target": "29", "source_name": "elvis presley", "target_name": "rolling stone", "weight": 1.0, "year": 2010}, {"source": "6", "target": "36", "source_name": "elvis presley", "target_name": "music industry", "weight": 3.0, "year": 2010}, {"source": "6", "target": "40", "source_name": "elvis presley", "target_name": "musical instruments", "weight": 1.0, "year": 2010}, {"source": "6", "target": "41", "source_name": "elvis presley", "target_name": "youth culture", "weight": 1.0, "year": 2010}, {"source": "6", "target": "42", "source_name": "elvis presley", "target_name": "simon frith", "weight": 2.0, "year": 2010}, {"source": "6", "target": "47", "source_name": "elvis presley", "target_name": "hard rock", "weight": 1.0, "year": 2010}, {"source": "6", "target": "48", "source_name": "elvis presley", "target_name": "pop music", "weight": 1.0, "year": 2010}, {"source": "6", "target": "51", "source_name": "elvis presley", "target_name": "cultural identity", "weight": 1.0, "year": 2010}, {"source": "6", "target": "53", "source_name": "elvis presley", "target_name": "popular music", "weight": 6.0, "year": 2010}, {"source": "6", "target": "54", "source_name": "elvis presley", "target_name": "american popular music", "weight": 3.0, "year": 2010}, {"source": "6", "target": "56", "source_name": "elvis presley", "target_name": "bruce springsteen", "weight": 1.0, "year": 2010}, {"source": "6", "target": "60", "source_name": "elvis presley", "target_name": "cultural studies", "weight": 1.0, "year": 2010}, {"source": "6", "target": "67", "source_name": "elvis presley", "target_name": "rock art", "weight": 1.0, "year": 2010}, {"source": "6", "target": "70", "source_name": "elvis presley", "target_name": "world war", "weight": 1.0, "year": 2010}, {"source": "6", "target": "72", "source_name": "elvis presley", "target_name": "jimi hendrix", "weight": 1.0, "year": 2010}, {"source": "6", "target": "74", "source_name": "elvis presley", "target_name": "united states", "weight": 2.0, "year": 2010}, {"source": "6", "target": "75", "source_name": "elvis presley", "target_name": "world war ii", "weight": 1.0, "year": 2010}, {"source": "6", "target": "77", "source_name": "elvis presley", "target_name": "rock music", "weight": 3.0, "year": 2010}, {"source": "6", "target": "78", "source_name": "elvis presley", "target_name": "hip hop", "weight": 1.0, "year": 2010}, {"source": "6", "target": "79", "source_name": "elvis presley", "target_name": "popular culture", "weight": 1.0, "year": 2010}, {"source": "6", "target": "80", "source_name": "elvis presley", "target_name": "folk music", "weight": 1.0, "year": 2010}, {"source": "6", "target": "82", "source_name": "elvis presley", "target_name": "heavy metal", "weight": 1.0, "year": 2010}, {"source": "7", "target": "9", "source_name": "nineteenth century", "target_name": "compact disc", "weight": 1.0, "year": 2010}, {"source": "7", "target": "10", "source_name": "nineteenth century", "target_name": "african american", "weight": 1.0, "year": 2010}, {"source": "7", "target": "19", "source_name": "nineteenth century", "target_name": "music video", "weight": 1.0, "year": 2010}, {"source": "7", "target": "22", "source_name": "nineteenth century", "target_name": "chamber music", "weight": 1.0, "year": 2010}, {"source": "7", "target": "34", "source_name": "nineteenth century", "target_name": "mass media", "weight": 1.0, "year": 2010}, {"source": "7", "target": "36", "source_name": "nineteenth century", "target_name": "music industry", "weight": 1.0, "year": 2010}, {"source": "7", "target": "38", "source_name": "nineteenth century", "target_name": "summary additional listening", "weight": 1.0, "year": 2010}, {"source": "7", "target": "40", "source_name": "nineteenth century", "target_name": "musical instruments", "weight": 1.0, "year": 2010}, {"source": "7", "target": "43", "source_name": "nineteenth century", "target_name": "music education", "weight": 1.0, "year": 2010}, {"source": "7", "target": "52", "source_name": "nineteenth century", "target_name": "folk song", "weight": 2.0, "year": 2010}, {"source": "7", "target": "53", "source_name": "nineteenth century", "target_name": "popular music", "weight": 2.0, "year": 2010}, {"source": "7", "target": "54", "source_name": "nineteenth century", "target_name": "american popular music", "weight": 1.0, "year": 2010}, {"source": "7", "target": "65", "source_name": "nineteenth century", "target_name": "country music", "weight": 1.0, "year": 2010}, {"source": "7", "target": "69", "source_name": "nineteenth century", "target_name": "classical music", "weight": 2.0, "year": 2010}, {"source": "7", "target": "70", "source_name": "nineteenth century", "target_name": "world war", "weight": 2.0, "year": 2010}, {"source": "7", "target": "74", "source_name": "nineteenth century", "target_name": "united states", "weight": 2.0, "year": 2010}, {"source": "7", "target": "79", "source_name": "nineteenth century", "target_name": "popular culture", "weight": 1.0, "year": 2010}, {"source": "7", "target": "80", "source_name": "nineteenth century", "target_name": "folk music", "weight": 1.0, "year": 2010}, {"source": "7", "target": "85", "source_name": "nineteenth century", "target_name": "jewish music", "weight": 1.0, "year": 2010}, {"source": "7", "target": "89", "source_name": "nineteenth century", "target_name": "electronic music", "weight": 1.0, "year": 2010}, {"source": "8", "target": "20", "source_name": "christian rock", "target_name": "garage rock", "weight": 1.0, "year": 2010}, {"source": "8", "target": "36", "source_name": "christian rock", "target_name": "music industry", "weight": 1.0, "year": 2010}, {"source": "8", "target": "44", "source_name": "christian rock", "target_name": "alternative rock", "weight": 1.0, "year": 2010}, {"source": "8", "target": "53", "source_name": "christian rock", "target_name": "popular music", "weight": 2.0, "year": 2010}, {"source": "8", "target": "57", "source_name": "christian rock", "target_name": "north america", "weight": 1.0, "year": 2010}, {"source": "8", "target": "65", "source_name": "christian rock", "target_name": "country music", "weight": 1.0, "year": 2010}, {"source": "8", "target": "73", "source_name": "christian rock", "target_name": "southern rock", "weight": 1.0, "year": 2010}, {"source": "8", "target": "77", "source_name": "christian rock", "target_name": "rock music", "weight": 1.0, "year": 2010}, {"source": "8", "target": "79", "source_name": "christian rock", "target_name": "popular culture", "weight": 1.0, "year": 2010}, {"source": "8", "target": "80", "source_name": "christian rock", "target_name": "folk music", "weight": 1.0, "year": 2010}, {"source": "9", "target": "10", "source_name": "compact disc", "target_name": "african american", "weight": 1.0, "year": 2010}, {"source": "9", "target": "24", "source_name": "compact disc", "target_name": "punk rock", "weight": 1.0, "year": 2010}, {"source": "9", "target": "29", "source_name": "compact disc", "target_name": "rolling stone", "weight": 1.0, "year": 2010}, {"source": "9", "target": "36", "source_name": "compact disc", "target_name": "music industry", "weight": 1.0, "year": 2010}, {"source": "9", "target": "37", "source_name": "compact disc", "target_name": "middle ages", "weight": 1.0, "year": 2010}, {"source": "9", "target": "48", "source_name": "compact disc", "target_name": "pop music", "weight": 1.0, "year": 2010}, {"source": "9", "target": "53", "source_name": "compact disc", "target_name": "popular music", "weight": 3.0, "year": 2010}, {"source": "9", "target": "74", "source_name": "compact disc", "target_name": "united states", "weight": 1.0, "year": 2010}, {"source": "9", "target": "77", "source_name": "compact disc", "target_name": "rock music", "weight": 1.0, "year": 2010}, {"source": "9", "target": "79", "source_name": "compact disc", "target_name": "popular culture", "weight": 1.0, "year": 2010}, {"source": "9", "target": "80", "source_name": "compact disc", "target_name": "folk music", "weight": 2.0, "year": 2010}, {"source": "9", "target": "85", "source_name": "compact disc", "target_name": "jewish music", "weight": 1.0, "year": 2010}, {"source": "9", "target": "89", "source_name": "compact disc", "target_name": "electronic music", "weight": 1.0, "year": 2010}, {"source": "10", "target": "15", "source_name": "african american", "target_name": "musical theatre", "weight": 1.0, "year": 2010}, {"source": "10", "target": "17", "source_name": "african american", "target_name": "civil rights", "weight": 1.0, "year": 2010}, {"source": "10", "target": "19", "source_name": "african american", "target_name": "music video", "weight": 1.0, "year": 2010}, {"source": "10", "target": "22", "source_name": "african american", "target_name": "chamber music", "weight": 1.0, "year": 2010}, {"source": "10", "target": "24", "source_name": "african american", "target_name": "punk rock", "weight": 2.0, "year": 2010}, {"source": "10", "target": "36", "source_name": "african american", "target_name": "music industry", "weight": 2.0, "year": 2010}, {"source": "10", "target": "38", "source_name": "african american", "target_name": "summary additional listening", "weight": 1.0, "year": 2010}, {"source": "10", "target": "40", "source_name": "african american", "target_name": "musical instruments", "weight": 1.0, "year": 2010}, {"source": "10", "target": "52", "source_name": "african american", "target_name": "folk song", "weight": 1.0, "year": 2010}, {"source": "10", "target": "53", "source_name": "african american", "target_name": "popular music", "weight": 5.0, "year": 2010}, {"source": "10", "target": "54", "source_name": "african american", "target_name": "american popular music", "weight": 1.0, "year": 2010}, {"source": "10", "target": "65", "source_name": "african american", "target_name": "country music", "weight": 1.0, "year": 2010}, {"source": "10", "target": "69", "source_name": "african american", "target_name": "classical music", "weight": 1.0, "year": 2010}, {"source": "10", "target": "74", "source_name": "african american", "target_name": "united states", "weight": 4.0, "year": 2010}, {"source": "10", "target": "75", "source_name": "african american", "target_name": "world war ii", "weight": 1.0, "year": 2010}, {"source": "10", "target": "77", "source_name": "african american", "target_name": "rock music", "weight": 1.0, "year": 2010}, {"source": "10", "target": "78", "source_name": "african american", "target_name": "hip hop", "weight": 1.0, "year": 2010}, {"source": "10", "target": "79", "source_name": "african american", "target_name": "popular culture", "weight": 2.0, "year": 2010}, {"source": "10", "target": "80", "source_name": "african american", "target_name": "folk music", "weight": 2.0, "year": 2010}, {"source": "10", "target": "89", "source_name": "african american", "target_name": "electronic music", "weight": 1.0, "year": 2010}, {"source": "11", "target": "23", "source_name": "south africa", "target_name": "electronic dance music", "weight": 1.0, "year": 2010}, {"source": "11", "target": "36", "source_name": "south africa", "target_name": "music industry", "weight": 1.0, "year": 2010}, {"source": "11", "target": "46", "source_name": "south africa", "target_name": "music festival", "weight": 2.0, "year": 2010}, {"source": "11", "target": "53", "source_name": "south africa", "target_name": "popular music", "weight": 1.0, "year": 2010}, {"source": "11", "target": "74", "source_name": "south africa", "target_name": "united states", "weight": 2.0, "year": 2010}, {"source": "11", "target": "88", "source_name": "south africa", "target_name": "oxford university press", "weight": 1.0, "year": 2010}, {"source": "12", "target": "15", "source_name": "rock opera", "target_name": "musical theatre", "weight": 3.0, "year": 2010}, {"source": "12", "target": "33", "source_name": "rock opera", "target_name": "jesus christ", "weight": 1.0, "year": 2010}, {"source": "12", "target": "41", "source_name": "rock opera", "target_name": "youth culture", "weight": 1.0, "year": 2010}, {"source": "12", "target": "53", "source_name": "rock opera", "target_name": "popular music", "weight": 1.0, "year": 2010}, {"source": "12", "target": "57", "source_name": "rock opera", "target_name": "north america", "weight": 1.0, "year": 2010}, {"source": "12", "target": "77", "source_name": "rock opera", "target_name": "rock music", "weight": 2.0, "year": 2010}, {"source": "12", "target": "79", "source_name": "rock opera", "target_name": "popular culture", "weight": 1.0, "year": 2010}, {"source": "15", "target": "33", "source_name": "musical theatre", "target_name": "jesus christ", "weight": 2.0, "year": 2010}, {"source": "15", "target": "53", "source_name": "musical theatre", "target_name": "popular music", "weight": 1.0, "year": 2010}, {"source": "15", "target": "70", "source_name": "musical theatre", "target_name": "world war", "weight": 1.0, "year": 2010}, {"source": "15", "target": "74", "source_name": "musical theatre", "target_name": "united states", "weight": 1.0, "year": 2010}, {"source": "15", "target": "77", "source_name": "musical theatre", "target_name": "rock music", "weight": 3.0, "year": 2010}, {"source": "15", "target": "87", "source_name": "musical theatre", "target_name": "music hall", "weight": 1.0, "year": 2010}, {"source": "16", "target": "29", "source_name": "bob dylan", "target_name": "rolling stone", "weight": 1.0, "year": 2010}, {"source": "16", "target": "30", "source_name": "bob dylan", "target_name": "rock band", "weight": 2.0, "year": 2010}, {"source": "16", "target": "36", "source_name": "bob dylan", "target_name": "music industry", "weight": 2.0, "year": 2010}, {"source": "16", "target": "42", "source_name": "bob dylan", "target_name": "simon frith", "weight": 1.0, "year": 2010}, {"source": "16", "target": "48", "source_name": "bob dylan", "target_name": "pop music", "weight": 2.0, "year": 2010}, {"source": "16", "target": "52", "source_name": "bob dylan", "target_name": "folk song", "weight": 1.0, "year": 2010}, {"source": "16", "target": "53", "source_name": "bob dylan", "target_name": "popular music", "weight": 9.0, "year": 2010}, {"source": "16", "target": "54", "source_name": "bob dylan", "target_name": "american popular music", "weight": 1.0, "year": 2010}, {"source": "16", "target": "69", "source_name": "bob dylan", "target_name": "classical music", "weight": 1.0, "year": 2010}, {"source": "16", "target": "70", "source_name": "bob dylan", "target_name": "world war", "weight": 1.0, "year": 2010}, {"source": "16", "target": "72", "source_name": "bob dylan", "target_name": "jimi hendrix", "weight": 2.0, "year": 2010}, {"source": "16", "target": "75", "source_name": "bob dylan", "target_name": "world war ii", "weight": 1.0, "year": 2010}, {"source": "16", "target": "77", "source_name": "bob dylan", "target_name": "rock music", "weight": 6.0, "year": 2010}, {"source": "16", "target": "80", "source_name": "bob dylan", "target_name": "folk music", "weight": 4.0, "year": 2010}, {"source": "17", "target": "30", "source_name": "civil rights", "target_name": "rock band", "weight": 1.0, "year": 2010}, {"source": "17", "target": "41", "source_name": "civil rights", "target_name": "youth culture", "weight": 1.0, "year": 2010}, {"source": "17", "target": "53", "source_name": "civil rights", "target_name": "popular music", "weight": 2.0, "year": 2010}, {"source": "17", "target": "70", "source_name": "civil rights", "target_name": "world war", "weight": 1.0, "year": 2010}, {"source": "17", "target": "73", "source_name": "civil rights", "target_name": "southern rock", "weight": 1.0, "year": 2010}, {"source": "17", "target": "74", "source_name": "civil rights", "target_name": "united states", "weight": 1.0, "year": 2010}, {"source": "17", "target": "75", "source_name": "civil rights", "target_name": "world war ii", "weight": 1.0, "year": 2010}, {"source": "17", "target": "77", "source_name": "civil rights", "target_name": "rock music", "weight": 2.0, "year": 2010}, {"source": "17", "target": "79", "source_name": "civil rights", "target_name": "popular culture", "weight": 1.0, "year": 2010}, {"source": "17", "target": "80", "source_name": "civil rights", "target_name": "folk music", "weight": 1.0, "year": 2010}, {"source": "18", "target": "30", "source_name": "middle class", "target_name": "rock band", "weight": 1.0, "year": 2010}, {"source": "18", "target": "53", "source_name": "middle class", "target_name": "popular music", "weight": 1.0, "year": 2010}, {"source": "18", "target": "61", "source_name": "middle class", "target_name": "progressive rock", "weight": 1.0, "year": 2010}, {"source": "18", "target": "77", "source_name": "middle class", "target_name": "rock music", "weight": 1.0, "year": 2010}, {"source": "19", "target": "22", "source_name": "music video", "target_name": "chamber music", "weight": 1.0, "year": 2010}, {"source": "19", "target": "30", "source_name": "music video", "target_name": "rock band", "weight": 2.0, "year": 2010}, {"source": "19", "target": "36", "source_name": "music video", "target_name": "music industry", "weight": 2.0, "year": 2010}, {"source": "19", "target": "38", "source_name": "music video", "target_name": "summary additional listening", "weight": 1.0, "year": 2010}, {"source": "19", "target": "40", "source_name": "music video", "target_name": "musical instruments", "weight": 1.0, "year": 2010}, {"source": "19", "target": "47", "source_name": "music video", "target_name": "hard rock", "weight": 1.0, "year": 2010}, {"source": "19", "target": "48", "source_name": "music video", "target_name": "pop music", "weight": 3.0, "year": 2010}, {"source": "19", "target": "49", "source_name": "music video", "target_name": "music theory", "weight": 1.0, "year": 2010}, {"source": "19", "target": "51", "source_name": "music video", "target_name": "cultural identity", "weight": 2.0, "year": 2010}, {"source": "19", "target": "52", "source_name": "music video", "target_name": "folk song", "weight": 1.0, "year": 2010}, {"source": "19", "target": "53", "source_name": "music video", "target_name": "popular music", "weight": 7.0, "year": 2010}, {"source": "19", "target": "54", "source_name": "music video", "target_name": "american popular music", "weight": 1.0, "year": 2010}, {"source": "19", "target": "65", "source_name": "music video", "target_name": "country music", "weight": 4.0, "year": 2010}, {"source": "19", "target": "69", "source_name": "music video", "target_name": "classical music", "weight": 1.0, "year": 2010}, {"source": "19", "target": "72", "source_name": "music video", "target_name": "jimi hendrix", "weight": 1.0, "year": 2010}, {"source": "19", "target": "74", "source_name": "music video", "target_name": "united states", "weight": 2.0, "year": 2010}, {"source": "19", "target": "76", "source_name": "music video", "target_name": "los angeles", "weight": 1.0, "year": 2010}, {"source": "19", "target": "77", "source_name": "music video", "target_name": "rock music", "weight": 8.0, "year": 2010}, {"source": "19", "target": "78", "source_name": "music video", "target_name": "hip hop", "weight": 1.0, "year": 2010}, {"source": "19", "target": "80", "source_name": "music video", "target_name": "folk music", "weight": 1.0, "year": 2010}, {"source": "19", "target": "82", "source_name": "music video", "target_name": "heavy metal", "weight": 1.0, "year": 2010}, {"source": "19", "target": "89", "source_name": "music video", "target_name": "electronic music", "weight": 1.0, "year": 2010}, {"source": "20", "target": "29", "source_name": "garage rock", "target_name": "rolling stone", "weight": 1.0, "year": 2010}, {"source": "20", "target": "30", "source_name": "garage rock", "target_name": "rock band", "weight": 2.0, "year": 2010}, {"source": "20", "target": "43", "source_name": "garage rock", "target_name": "music education", "weight": 1.0, "year": 2010}, {"source": "20", "target": "44", "source_name": "garage rock", "target_name": "alternative rock", "weight": 1.0, "year": 2010}, {"source": "20", "target": "48", "source_name": "garage rock", "target_name": "pop music", "weight": 1.0, "year": 2010}, {"source": "20", "target": "53", "source_name": "garage rock", "target_name": "popular music", "weight": 3.0, "year": 2010}, {"source": "20", "target": "57", "source_name": "garage rock", "target_name": "north america", "weight": 1.0, "year": 2010}, {"source": "20", "target": "65", "source_name": "garage rock", "target_name": "country music", "weight": 1.0, "year": 2010}, {"source": "20", "target": "73", "source_name": "garage rock", "target_name": "southern rock", "weight": 1.0, "year": 2010}, {"source": "20", "target": "77", "source_name": "garage rock", "target_name": "rock music", "weight": 3.0, "year": 2010}, {"source": "20", "target": "80", "source_name": "garage rock", "target_name": "folk music", "weight": 1.0, "year": 2010}, {"source": "21", "target": "47", "source_name": "social protest", "target_name": "hard rock", "weight": 1.0, "year": 2010}, {"source": "21", "target": "48", "source_name": "social protest", "target_name": "pop music", "weight": 1.0, "year": 2010}, {"source": "21", "target": "53", "source_name": "social protest", "target_name": "popular music", "weight": 2.0, "year": 2010}, {"source": "21", "target": "57", "source_name": "social protest", "target_name": "north america", "weight": 2.0, "year": 2010}, {"source": "21", "target": "71", "source_name": "social protest", "target_name": "latin american", "weight": 1.0, "year": 2010}, {"source": "21", "target": "74", "source_name": "social protest", "target_name": "united states", "weight": 1.0, "year": 2010}, {"source": "21", "target": "77", "source_name": "social protest", "target_name": "rock music", "weight": 1.0, "year": 2010}, {"source": "21", "target": "82", "source_name": "social protest", "target_name": "heavy metal", "weight": 1.0, "year": 2010}, {"source": "22", "target": "35", "source_name": "chamber music", "target_name": "ancient greek", "weight": 1.0, "year": 2010}, {"source": "22", "target": "36", "source_name": "chamber music", "target_name": "music industry", "weight": 1.0, "year": 2010}, {"source": "22", "target": "38", "source_name": "chamber music", "target_name": "summary additional listening", "weight": 1.0, "year": 2010}, {"source": "22", "target": "40", "source_name": "chamber music", "target_name": "musical instruments", "weight": 1.0, "year": 2010}, {"source": "22", "target": "52", "source_name": "chamber music", "target_name": "folk song", "weight": 1.0, "year": 2010}, {"source": "22", "target": "53", "source_name": "chamber music", "target_name": "popular music", "weight": 1.0, "year": 2010}, {"source": "22", "target": "54", "source_name": "chamber music", "target_name": "american popular music", "weight": 1.0, "year": 2010}, {"source": "22", "target": "65", "source_name": "chamber music", "target_name": "country music", "weight": 2.0, "year": 2010}, {"source": "22", "target": "69", "source_name": "chamber music", "target_name": "classical music", "weight": 2.0, "year": 2010}, {"source": "22", "target": "74", "source_name": "chamber music", "target_name": "united states", "weight": 1.0, "year": 2010}, {"source": "22", "target": "77", "source_name": "chamber music", "target_name": "rock music", "weight": 1.0, "year": 2010}, {"source": "22", "target": "80", "source_name": "chamber music", "target_name": "folk music", "weight": 2.0, "year": 2010}, {"source": "22", "target": "89", "source_name": "chamber music", "target_name": "electronic music", "weight": 3.0, "year": 2010}, {"source": "23", "target": "36", "source_name": "electronic dance music", "target_name": "music industry", "weight": 2.0, "year": 2010}, {"source": "23", "target": "42", "source_name": "electronic dance music", "target_name": "simon frith", "weight": 2.0, "year": 2010}, {"source": "23", "target": "47", "source_name": "electronic dance music", "target_name": "hard rock", "weight": 1.0, "year": 2010}, {"source": "23", "target": "53", "source_name": "electronic dance music", "target_name": "popular music", "weight": 4.0, "year": 2010}, {"source": "23", "target": "56", "source_name": "electronic dance music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2010}, {"source": "23", "target": "60", "source_name": "electronic dance music", "target_name": "cultural studies", "weight": 2.0, "year": 2010}, {"source": "23", "target": "74", "source_name": "electronic dance music", "target_name": "united states", "weight": 1.0, "year": 2010}, {"source": "23", "target": "76", "source_name": "electronic dance music", "target_name": "los angeles", "weight": 1.0, "year": 2010}, {"source": "23", "target": "78", "source_name": "electronic dance music", "target_name": "hip hop", "weight": 1.0, "year": 2010}, {"source": "23", "target": "79", "source_name": "electronic dance music", "target_name": "popular culture", "weight": 1.0, "year": 2010}, {"source": "23", "target": "82", "source_name": "electronic dance music", "target_name": "heavy metal", "weight": 1.0, "year": 2010}, {"source": "23", "target": "88", "source_name": "electronic dance music", "target_name": "oxford university press", "weight": 1.0, "year": 2010}, {"source": "23", "target": "89", "source_name": "electronic dance music", "target_name": "electronic music", "weight": 1.0, "year": 2010}, {"source": "24", "target": "36", "source_name": "punk rock", "target_name": "music industry", "weight": 1.0, "year": 2010}, {"source": "24", "target": "42", "source_name": "punk rock", "target_name": "simon frith", "weight": 1.0, "year": 2010}, {"source": "24", "target": "44", "source_name": "punk rock", "target_name": "alternative rock", "weight": 1.0, "year": 2010}, {"source": "24", "target": "47", "source_name": "punk rock", "target_name": "hard rock", "weight": 2.0, "year": 2010}, {"source": "24", "target": "48", "source_name": "punk rock", "target_name": "pop music", "weight": 4.0, "year": 2010}, {"source": "24", "target": "53", "source_name": "punk rock", "target_name": "popular music", "weight": 6.0, "year": 2010}, {"source": "24", "target": "65", "source_name": "punk rock", "target_name": "country music", "weight": 1.0, "year": 2010}, {"source": "24", "target": "69", "source_name": "punk rock", "target_name": "classical music", "weight": 1.0, "year": 2010}, {"source": "24", "target": "74", "source_name": "punk rock", "target_name": "united states", "weight": 2.0, "year": 2010}, {"source": "24", "target": "77", "source_name": "punk rock", "target_name": "rock music", "weight": 6.0, "year": 2010}, {"source": "24", "target": "78", "source_name": "punk rock", "target_name": "hip hop", "weight": 1.0, "year": 2010}, {"source": "24", "target": "79", "source_name": "punk rock", "target_name": "popular culture", "weight": 1.0, "year": 2010}, {"source": "24", "target": "80", "source_name": "punk rock", "target_name": "folk music", "weight": 1.0, "year": 2010}, {"source": "24", "target": "82", "source_name": "punk rock", "target_name": "heavy metal", "weight": 3.0, "year": 2010}, {"source": "25", "target": "53", "source_name": "russian rock", "target_name": "popular music", "weight": 1.0, "year": 2010}, {"source": "25", "target": "77", "source_name": "russian rock", "target_name": "rock music", "weight": 1.0, "year": 2010}, {"source": "27", "target": "48", "source_name": "pop rock", "target_name": "pop music", "weight": 1.0, "year": 2010}, {"source": "27", "target": "53", "source_name": "pop rock", "target_name": "popular music", "weight": 1.0, "year": 2010}, {"source": "27", "target": "64", "source_name": "pop rock", "target_name": "english language", "weight": 1.0, "year": 2010}, {"source": "27", "target": "66", "source_name": "pop rock", "target_name": "hong kong", "weight": 1.0, "year": 2010}, {"source": "27", "target": "67", "source_name": "pop rock", "target_name": "rock art", "weight": 1.0, "year": 2010}, {"source": "27", "target": "83", "source_name": "pop rock", "target_name": "folk rock", "weight": 1.0, "year": 2010}, {"source": "28", "target": "37", "source_name": "high school", "target_name": "middle ages", "weight": 1.0, "year": 2010}, {"source": "28", "target": "48", "source_name": "high school", "target_name": "pop music", "weight": 1.0, "year": 2010}, {"source": "28", "target": "77", "source_name": "high school", "target_name": "rock music", "weight": 2.0, "year": 2010}, {"source": "28", "target": "82", "source_name": "high school", "target_name": "heavy metal", "weight": 1.0, "year": 2010}, {"source": "29", "target": "36", "source_name": "rolling stone", "target_name": "music industry", "weight": 1.0, "year": 2010}, {"source": "29", "target": "42", "source_name": "rolling stone", "target_name": "simon frith", "weight": 1.0, "year": 2010}, {"source": "29", "target": "48", "source_name": "rolling stone", "target_name": "pop music", "weight": 3.0, "year": 2010}, {"source": "29", "target": "53", "source_name": "rolling stone", "target_name": "popular music", "weight": 5.0, "year": 2010}, {"source": "29", "target": "55", "source_name": "rolling stone", "target_name": "rock criticism", "weight": 3.0, "year": 2010}, {"source": "29", "target": "56", "source_name": "rolling stone", "target_name": "bruce springsteen", "weight": 1.0, "year": 2010}, {"source": "29", "target": "62", "source_name": "rolling stone", "target_name": "led zeppelin", "weight": 1.0, "year": 2010}, {"source": "29", "target": "72", "source_name": "rolling stone", "target_name": "jimi hendrix", "weight": 2.0, "year": 2010}, {"source": "29", "target": "74", "source_name": "rolling stone", "target_name": "united states", "weight": 1.0, "year": 2010}, {"source": "29", "target": "77", "source_name": "rolling stone", "target_name": "rock music", "weight": 7.0, "year": 2010}, {"source": "29", "target": "87", "source_name": "rolling stone", "target_name": "music hall", "weight": 1.0, "year": 2010}, {"source": "30", "target": "36", "source_name": "rock band", "target_name": "music industry", "weight": 1.0, "year": 2010}, {"source": "30", "target": "37", "source_name": "rock band", "target_name": "middle ages", "weight": 1.0, "year": 2010}, {"source": "30", "target": "43", "source_name": "rock band", "target_name": "music education", "weight": 1.0, "year": 2010}, {"source": "30", "target": "44", "source_name": "rock band", "target_name": "alternative rock", "weight": 1.0, "year": 2010}, {"source": "30", "target": "48", "source_name": "rock band", "target_name": "pop music", "weight": 1.0, "year": 2010}, {"source": "30", "target": "52", "source_name": "rock band", "target_name": "folk song", "weight": 1.0, "year": 2010}, {"source": "30", "target": "53", "source_name": "rock band", "target_name": "popular music", "weight": 15.0, "year": 2010}, {"source": "30", "target": "61", "source_name": "rock band", "target_name": "progressive rock", "weight": 6.0, "year": 2010}, {"source": "30", "target": "65", "source_name": "rock band", "target_name": "country music", "weight": 1.0, "year": 2010}, {"source": "30", "target": "69", "source_name": "rock band", "target_name": "classical music", "weight": 2.0, "year": 2010}, {"source": "30", "target": "72", "source_name": "rock band", "target_name": "jimi hendrix", "weight": 1.0, "year": 2010}, {"source": "30", "target": "73", "source_name": "rock band", "target_name": "southern rock", "weight": 2.0, "year": 2010}, {"source": "30", "target": "74", "source_name": "rock band", "target_name": "united states", "weight": 1.0, "year": 2010}, {"source": "30", "target": "76", "source_name": "rock band", "target_name": "los angeles", "weight": 1.0, "year": 2010}, {"source": "30", "target": "77", "source_name": "rock band", "target_name": "rock music", "weight": 19.0, "year": 2010}, {"source": "30", "target": "79", "source_name": "rock band", "target_name": "popular culture", "weight": 1.0, "year": 2010}, {"source": "30", "target": "80", "source_name": "rock band", "target_name": "folk music", "weight": 2.0, "year": 2010}, {"source": "30", "target": "82", "source_name": "rock band", "target_name": "heavy metal", "weight": 1.0, "year": 2010}, {"source": "32", "target": "43", "source_name": "higher education", "target_name": "music education", "weight": 1.0, "year": 2010}, {"source": "33", "target": "53", "source_name": "jesus christ", "target_name": "popular music", "weight": 1.0, "year": 2010}, {"source": "33", "target": "70", "source_name": "jesus christ", "target_name": "world war", "weight": 1.0, "year": 2010}, {"source": "33", "target": "77", "source_name": "jesus christ", "target_name": "rock music", "weight": 3.0, "year": 2010}, {"source": "34", "target": "36", "source_name": "mass media", "target_name": "music industry", "weight": 1.0, "year": 2010}, {"source": "34", "target": "40", "source_name": "mass media", "target_name": "musical instruments", "weight": 1.0, "year": 2010}, {"source": "34", "target": "41", "source_name": "mass media", "target_name": "youth culture", "weight": 1.0, "year": 2010}, {"source": "34", "target": "43", "source_name": "mass media", "target_name": "music education", "weight": 1.0, "year": 2010}, {"source": "34", "target": "46", "source_name": "mass media", "target_name": "music festival", "weight": 1.0, "year": 2010}, {"source": "34", "target": "48", "source_name": "mass media", "target_name": "pop music", "weight": 2.0, "year": 2010}, {"source": "34", "target": "51", "source_name": "mass media", "target_name": "cultural identity", "weight": 1.0, "year": 2010}, {"source": "34", "target": "52", "source_name": "mass media", "target_name": "folk song", "weight": 2.0, "year": 2010}, {"source": "34", "target": "53", "source_name": "mass media", "target_name": "popular music", "weight": 6.0, "year": 2010}, {"source": "34", "target": "65", "source_name": "mass media", "target_name": "country music", "weight": 1.0, "year": 2010}, {"source": "34", "target": "66", "source_name": "mass media", "target_name": "hong kong", "weight": 1.0, "year": 2010}, {"source": "34", "target": "67", "source_name": "mass media", "target_name": "rock art", "weight": 1.0, "year": 2010}, {"source": "34", "target": "69", "source_name": "mass media", "target_name": "classical music", "weight": 1.0, "year": 2010}, {"source": "34", "target": "77", "source_name": "mass media", "target_name": "rock music", "weight": 4.0, "year": 2010}, {"source": "34", "target": "79", "source_name": "mass media", "target_name": "popular culture", "weight": 1.0, "year": 2010}, {"source": "35", "target": "43", "source_name": "ancient greek", "target_name": "music education", "weight": 1.0, "year": 2010}, {"source": "35", "target": "65", "source_name": "ancient greek", "target_name": "country music", "weight": 1.0, "year": 2010}, {"source": "35", "target": "77", "source_name": "ancient greek", "target_name": "rock music", "weight": 1.0, "year": 2010}, {"source": "35", "target": "80", "source_name": "ancient greek", "target_name": "folk music", "weight": 1.0, "year": 2010}, {"source": "35", "target": "89", "source_name": "ancient greek", "target_name": "electronic music", "weight": 1.0, "year": 2010}, {"source": "36", "target": "38", "source_name": "music industry", "target_name": "summary additional listening", "weight": 1.0, "year": 2010}, {"source": "36", "target": "40", "source_name": "music industry", "target_name": "musical instruments", "weight": 1.0, "year": 2010}, {"source": "36", "target": "41", "source_name": "music industry", "target_name": "youth culture", "weight": 2.0, "year": 2010}, {"source": "36", "target": "42", "source_name": "music industry", "target_name": "simon frith", "weight": 2.0, "year": 2010}, {"source": "36", "target": "43", "source_name": "music industry", "target_name": "music education", "weight": 2.0, "year": 2010}, {"source": "36", "target": "46", "source_name": "music industry", "target_name": "music festival", "weight": 1.0, "year": 2010}, {"source": "36", "target": "47", "source_name": "music industry", "target_name": "hard rock", "weight": 3.0, "year": 2010}, {"source": "36", "target": "48", "source_name": "music industry", "target_name": "pop music", "weight": 8.0, "year": 2010}, {"source": "36", "target": "49", "source_name": "music industry", "target_name": "music theory", "weight": 1.0, "year": 2010}, {"source": "36", "target": "50", "source_name": "music industry", "target_name": "hollywood film", "weight": 1.0, "year": 2010}, {"source": "36", "target": "51", "source_name": "music industry", "target_name": "cultural identity", "weight": 1.0, "year": 2010}, {"source": "36", "target": "52", "source_name": "music industry", "target_name": "folk song", "weight": 1.0, "year": 2010}, {"source": "36", "target": "53", "source_name": "music industry", "target_name": "popular music", "weight": 27.0, "year": 2010}, {"source": "36", "target": "54", "source_name": "music industry", "target_name": "american popular music", "weight": 3.0, "year": 2010}, {"source": "36", "target": "55", "source_name": "music industry", "target_name": "rock criticism", "weight": 2.0, "year": 2010}, {"source": "36", "target": "56", "source_name": "music industry", "target_name": "bruce springsteen", "weight": 1.0, "year": 2010}, {"source": "36", "target": "60", "source_name": "music industry", "target_name": "cultural studies", "weight": 1.0, "year": 2010}, {"source": "36", "target": "61", "source_name": "music industry", "target_name": "progressive rock", "weight": 1.0, "year": 2010}, {"source": "36", "target": "62", "source_name": "music industry", "target_name": "led zeppelin", "weight": 1.0, "year": 2010}, {"source": "36", "target": "65", "source_name": "music industry", "target_name": "country music", "weight": 2.0, "year": 2010}, {"source": "36", "target": "66", "source_name": "music industry", "target_name": "hong kong", "weight": 1.0, "year": 2010}, {"source": "36", "target": "67", "source_name": "music industry", "target_name": "rock art", "weight": 1.0, "year": 2010}, {"source": "36", "target": "68", "source_name": "music industry", "target_name": "hearing loss", "weight": 1.0, "year": 2010}, {"source": "36", "target": "69", "source_name": "music industry", "target_name": "classical music", "weight": 5.0, "year": 2010}, {"source": "36", "target": "70", "source_name": "music industry", "target_name": "world war", "weight": 2.0, "year": 2010}, {"source": "36", "target": "72", "source_name": "music industry", "target_name": "jimi hendrix", "weight": 3.0, "year": 2010}, {"source": "36", "target": "74", "source_name": "music industry", "target_name": "united states", "weight": 4.0, "year": 2010}, {"source": "36", "target": "75", "source_name": "music industry", "target_name": "world war ii", "weight": 3.0, "year": 2010}, {"source": "36", "target": "76", "source_name": "music industry", "target_name": "los angeles", "weight": 2.0, "year": 2010}, {"source": "36", "target": "77", "source_name": "music industry", "target_name": "rock music", "weight": 13.0, "year": 2010}, {"source": "36", "target": "78", "source_name": "music industry", "target_name": "hip hop", "weight": 5.0, "year": 2010}, {"source": "36", "target": "79", "source_name": "music industry", "target_name": "popular culture", "weight": 4.0, "year": 2010}, {"source": "36", "target": "80", "source_name": "music industry", "target_name": "folk music", "weight": 3.0, "year": 2010}, {"source": "36", "target": "82", "source_name": "music industry", "target_name": "heavy metal", "weight": 2.0, "year": 2010}, {"source": "36", "target": "83", "source_name": "music industry", "target_name": "folk rock", "weight": 1.0, "year": 2010}, {"source": "36", "target": "88", "source_name": "music industry", "target_name": "oxford university press", "weight": 2.0, "year": 2010}, {"source": "36", "target": "89", "source_name": "music industry", "target_name": "electronic music", "weight": 2.0, "year": 2010}, {"source": "37", "target": "44", "source_name": "middle ages", "target_name": "alternative rock", "weight": 1.0, "year": 2010}, {"source": "37", "target": "58", "source_name": "middle ages", "target_name": "music therapy", "weight": 1.0, "year": 2010}, {"source": "37", "target": "61", "source_name": "middle ages", "target_name": "progressive rock", "weight": 1.0, "year": 2010}, {"source": "37", "target": "69", "source_name": "middle ages", "target_name": "classical music", "weight": 1.0, "year": 2010}, {"source": "37", "target": "77", "source_name": "middle ages", "target_name": "rock music", "weight": 2.0, "year": 2010}, {"source": "37", "target": "80", "source_name": "middle ages", "target_name": "folk music", "weight": 2.0, "year": 2010}, {"source": "38", "target": "40", "source_name": "summary additional listening", "target_name": "musical instruments", "weight": 1.0, "year": 2010}, {"source": "38", "target": "52", "source_name": "summary additional listening", "target_name": "folk song", "weight": 1.0, "year": 2010}, {"source": "38", "target": "53", "source_name": "summary additional listening", "target_name": "popular music", "weight": 1.0, "year": 2010}, {"source": "38", "target": "54", "source_name": "summary additional listening", "target_name": "american popular music", "weight": 1.0, "year": 2010}, {"source": "38", "target": "65", "source_name": "summary additional listening", "target_name": "country music", "weight": 1.0, "year": 2010}, {"source": "38", "target": "69", "source_name": "summary additional listening", "target_name": "classical music", "weight": 1.0, "year": 2010}, {"source": "38", "target": "74", "source_name": "summary additional listening", "target_name": "united states", "weight": 1.0, "year": 2010}, {"source": "38", "target": "80", "source_name": "summary additional listening", "target_name": "folk music", "weight": 1.0, "year": 2010}, {"source": "38", "target": "89", "source_name": "summary additional listening", "target_name": "electronic music", "weight": 1.0, "year": 2010}, {"source": "40", "target": "43", "source_name": "musical instruments", "target_name": "music education", "weight": 1.0, "year": 2010}, {"source": "40", "target": "49", "source_name": "musical instruments", "target_name": "music theory", "weight": 1.0, "year": 2010}, {"source": "40", "target": "52", "source_name": "musical instruments", "target_name": "folk song", "weight": 1.0, "year": 2010}, {"source": "40", "target": "53", "source_name": "musical instruments", "target_name": "popular music", "weight": 2.0, "year": 2010}, {"source": "40", "target": "54", "source_name": "musical instruments", "target_name": "american popular music", "weight": 2.0, "year": 2010}, {"source": "40", "target": "65", "source_name": "musical instruments", "target_name": "country music", "weight": 1.0, "year": 2010}, {"source": "40", "target": "69", "source_name": "musical instruments", "target_name": "classical music", "weight": 1.0, "year": 2010}, {"source": "40", "target": "70", "source_name": "musical instruments", "target_name": "world war", "weight": 1.0, "year": 2010}, {"source": "40", "target": "74", "source_name": "musical instruments", "target_name": "united states", "weight": 2.0, "year": 2010}, {"source": "40", "target": "75", "source_name": "musical instruments", "target_name": "world war ii", "weight": 1.0, "year": 2010}, {"source": "40", "target": "80", "source_name": "musical instruments", "target_name": "folk music", "weight": 1.0, "year": 2010}, {"source": "40", "target": "89", "source_name": "musical instruments", "target_name": "electronic music", "weight": 2.0, "year": 2010}, {"source": "41", "target": "48", "source_name": "youth culture", "target_name": "pop music", "weight": 4.0, "year": 2010}, {"source": "41", "target": "51", "source_name": "youth culture", "target_name": "cultural identity", "weight": 2.0, "year": 2010}, {"source": "41", "target": "53", "source_name": "youth culture", "target_name": "popular music", "weight": 3.0, "year": 2010}, {"source": "41", "target": "60", "source_name": "youth culture", "target_name": "cultural studies", "weight": 2.0, "year": 2010}, {"source": "41", "target": "66", "source_name": "youth culture", "target_name": "hong kong", "weight": 1.0, "year": 2010}, {"source": "41", "target": "74", "source_name": "youth culture", "target_name": "united states", "weight": 1.0, "year": 2010}, {"source": "41", "target": "75", "source_name": "youth culture", "target_name": "world war ii", "weight": 1.0, "year": 2010}, {"source": "41", "target": "77", "source_name": "youth culture", "target_name": "rock music", "weight": 6.0, "year": 2010}, {"source": "41", "target": "80", "source_name": "youth culture", "target_name": "folk music", "weight": 1.0, "year": 2010}, {"source": "42", "target": "47", "source_name": "simon frith", "target_name": "hard rock", "weight": 1.0, "year": 2010}, {"source": "42", "target": "48", "source_name": "simon frith", "target_name": "pop music", "weight": 6.0, "year": 2010}, {"source": "42", "target": "49", "source_name": "simon frith", "target_name": "music theory", "weight": 1.0, "year": 2010}, {"source": "42", "target": "51", "source_name": "simon frith", "target_name": "cultural identity", "weight": 1.0, "year": 2010}, {"source": "42", "target": "53", "source_name": "simon frith", "target_name": "popular music", "weight": 4.0, "year": 2010}, {"source": "42", "target": "55", "source_name": "simon frith", "target_name": "rock criticism", "weight": 2.0, "year": 2010}, {"source": "42", "target": "56", "source_name": "simon frith", "target_name": "bruce springsteen", "weight": 1.0, "year": 2010}, {"source": "42", "target": "57", "source_name": "simon frith", "target_name": "north america", "weight": 1.0, "year": 2010}, {"source": "42", "target": "60", "source_name": "simon frith", "target_name": "cultural studies", "weight": 1.0, "year": 2010}, {"source": "42", "target": "61", "source_name": "simon frith", "target_name": "progressive rock", "weight": 1.0, "year": 2010}, {"source": "42", "target": "65", "source_name": "simon frith", "target_name": "country music", "weight": 1.0, "year": 2010}, {"source": "42", "target": "72", "source_name": "simon frith", "target_name": "jimi hendrix", "weight": 1.0, "year": 2010}, {"source": "42", "target": "76", "source_name": "simon frith", "target_name": "los angeles", "weight": 1.0, "year": 2010}, {"source": "42", "target": "77", "source_name": "simon frith", "target_name": "rock music", "weight": 3.0, "year": 2010}, {"source": "42", "target": "78", "source_name": "simon frith", "target_name": "hip hop", "weight": 1.0, "year": 2010}, {"source": "42", "target": "79", "source_name": "simon frith", "target_name": "popular culture", "weight": 1.0, "year": 2010}, {"source": "42", "target": "82", "source_name": "simon frith", "target_name": "heavy metal", "weight": 1.0, "year": 2010}, {"source": "42", "target": "88", "source_name": "simon frith", "target_name": "oxford university press", "weight": 1.0, "year": 2010}, {"source": "43", "target": "48", "source_name": "music education", "target_name": "pop music", "weight": 2.0, "year": 2010}, {"source": "43", "target": "49", "source_name": "music education", "target_name": "music theory", "weight": 2.0, "year": 2010}, {"source": "43", "target": "52", "source_name": "music education", "target_name": "folk song", "weight": 1.0, "year": 2010}, {"source": "43", "target": "53", "source_name": "music education", "target_name": "popular music", "weight": 5.0, "year": 2010}, {"source": "43", "target": "57", "source_name": "music education", "target_name": "north america", "weight": 1.0, "year": 2010}, {"source": "43", "target": "60", "source_name": "music education", "target_name": "cultural studies", "weight": 1.0, "year": 2010}, {"source": "43", "target": "66", "source_name": "music education", "target_name": "hong kong", "weight": 1.0, "year": 2010}, {"source": "43", "target": "69", "source_name": "music education", "target_name": "classical music", "weight": 3.0, "year": 2010}, {"source": "43", "target": "74", "source_name": "music education", "target_name": "united states", "weight": 1.0, "year": 2010}, {"source": "43", "target": "77", "source_name": "music education", "target_name": "rock music", "weight": 3.0, "year": 2010}, {"source": "43", "target": "80", "source_name": "music education", "target_name": "folk music", "weight": 5.0, "year": 2010}, {"source": "44", "target": "48", "source_name": "alternative rock", "target_name": "pop music", "weight": 1.0, "year": 2010}, {"source": "44", "target": "53", "source_name": "alternative rock", "target_name": "popular music", "weight": 7.0, "year": 2010}, {"source": "44", "target": "57", "source_name": "alternative rock", "target_name": "north america", "weight": 3.0, "year": 2010}, {"source": "44", "target": "61", "source_name": "alternative rock", "target_name": "progressive rock", "weight": 1.0, "year": 2010}, {"source": "44", "target": "65", "source_name": "alternative rock", "target_name": "country music", "weight": 2.0, "year": 2010}, {"source": "44", "target": "67", "source_name": "alternative rock", "target_name": "rock art", "weight": 1.0, "year": 2010}, {"source": "44", "target": "73", "source_name": "alternative rock", "target_name": "southern rock", "weight": 1.0, "year": 2010}, {"source": "44", "target": "74", "source_name": "alternative rock", "target_name": "united states", "weight": 2.0, "year": 2010}, {"source": "44", "target": "77", "source_name": "alternative rock", "target_name": "rock music", "weight": 5.0, "year": 2010}, {"source": "44", "target": "78", "source_name": "alternative rock", "target_name": "hip hop", "weight": 1.0, "year": 2010}, {"source": "44", "target": "80", "source_name": "alternative rock", "target_name": "folk music", "weight": 1.0, "year": 2010}, {"source": "46", "target": "48", "source_name": "music festival", "target_name": "pop music", "weight": 2.0, "year": 2010}, {"source": "46", "target": "69", "source_name": "music festival", "target_name": "classical music", "weight": 2.0, "year": 2010}, {"source": "46", "target": "77", "source_name": "music festival", "target_name": "rock music", "weight": 1.0, "year": 2010}, {"source": "46", "target": "80", "source_name": "music festival", "target_name": "folk music", "weight": 1.0, "year": 2010}, {"source": "47", "target": "48", "source_name": "hard rock", "target_name": "pop music", "weight": 2.0, "year": 2010}, {"source": "47", "target": "53", "source_name": "hard rock", "target_name": "popular music", "weight": 4.0, "year": 2010}, {"source": "47", "target": "56", "source_name": "hard rock", "target_name": "bruce springsteen", "weight": 1.0, "year": 2010}, {"source": "47", "target": "57", "source_name": "hard rock", "target_name": "north america", "weight": 1.0, "year": 2010}, {"source": "47", "target": "65", "source_name": "hard rock", "target_name": "country music", "weight": 1.0, "year": 2010}, {"source": "47", "target": "69", "source_name": "hard rock", "target_name": "classical music", "weight": 2.0, "year": 2010}, {"source": "47", "target": "77", "source_name": "hard rock", "target_name": "rock music", "weight": 8.0, "year": 2010}, {"source": "47", "target": "78", "source_name": "hard rock", "target_name": "hip hop", "weight": 1.0, "year": 2010}, {"source": "47", "target": "79", "source_name": "hard rock", "target_name": "popular culture", "weight": 2.0, "year": 2010}, {"source": "47", "target": "82", "source_name": "hard rock", "target_name": "heavy metal", "weight": 4.0, "year": 2010}, {"source": "47", "target": "89", "source_name": "hard rock", "target_name": "electronic music", "weight": 1.0, "year": 2010}, {"source": "48", "target": "51", "source_name": "pop music", "target_name": "cultural identity", "weight": 3.0, "year": 2010}, {"source": "48", "target": "52", "source_name": "pop music", "target_name": "folk song", "weight": 2.0, "year": 2010}, {"source": "48", "target": "53", "source_name": "pop music", "target_name": "popular music", "weight": 26.0, "year": 2010}, {"source": "48", "target": "55", "source_name": "pop music", "target_name": "rock criticism", "weight": 2.0, "year": 2010}, {"source": "48", "target": "57", "source_name": "pop music", "target_name": "north america", "weight": 2.0, "year": 2010}, {"source": "48", "target": "59", "source_name": "pop music", "target_name": "college students", "weight": 2.0, "year": 2010}, {"source": "48", "target": "60", "source_name": "pop music", "target_name": "cultural studies", "weight": 1.0, "year": 2010}, {"source": "48", "target": "62", "source_name": "pop music", "target_name": "led zeppelin", "weight": 1.0, "year": 2010}, {"source": "48", "target": "64", "source_name": "pop music", "target_name": "english language", "weight": 2.0, "year": 2010}, {"source": "48", "target": "65", "source_name": "pop music", "target_name": "country music", "weight": 1.0, "year": 2010}, {"source": "48", "target": "66", "source_name": "pop music", "target_name": "hong kong", "weight": 4.0, "year": 2010}, {"source": "48", "target": "67", "source_name": "pop music", "target_name": "rock art", "weight": 3.0, "year": 2010}, {"source": "48", "target": "69", "source_name": "pop music", "target_name": "classical music", "weight": 5.0, "year": 2010}, {"source": "48", "target": "70", "source_name": "pop music", "target_name": "world war", "weight": 2.0, "year": 2010}, {"source": "48", "target": "71", "source_name": "pop music", "target_name": "latin american", "weight": 1.0, "year": 2010}, {"source": "48", "target": "72", "source_name": "pop music", "target_name": "jimi hendrix", "weight": 3.0, "year": 2010}, {"source": "48", "target": "74", "source_name": "pop music", "target_name": "united states", "weight": 4.0, "year": 2010}, {"source": "48", "target": "76", "source_name": "pop music", "target_name": "los angeles", "weight": 1.0, "year": 2010}, {"source": "48", "target": "77", "source_name": "pop music", "target_name": "rock music", "weight": 26.0, "year": 2010}, {"source": "48", "target": "78", "source_name": "pop music", "target_name": "hip hop", "weight": 2.0, "year": 2010}, {"source": "48", "target": "79", "source_name": "pop music", "target_name": "popular culture", "weight": 2.0, "year": 2010}, {"source": "48", "target": "80", "source_name": "pop music", "target_name": "folk music", "weight": 3.0, "year": 2010}, {"source": "48", "target": "82", "source_name": "pop music", "target_name": "heavy metal", "weight": 2.0, "year": 2010}, {"source": "48", "target": "83", "source_name": "pop music", "target_name": "folk rock", "weight": 2.0, "year": 2010}, {"source": "49", "target": "53", "source_name": "music theory", "target_name": "popular music", "weight": 4.0, "year": 2010}, {"source": "49", "target": "54", "source_name": "music theory", "target_name": "american popular music", "weight": 1.0, "year": 2010}, {"source": "49", "target": "55", "source_name": "music theory", "target_name": "rock criticism", "weight": 1.0, "year": 2010}, {"source": "49", "target": "57", "source_name": "music theory", "target_name": "north america", "weight": 2.0, "year": 2010}, {"source": "49", "target": "61", "source_name": "music theory", "target_name": "progressive rock", "weight": 1.0, "year": 2010}, {"source": "49", "target": "69", "source_name": "music theory", "target_name": "classical music", "weight": 1.0, "year": 2010}, {"source": "49", "target": "72", "source_name": "music theory", "target_name": "jimi hendrix", "weight": 1.0, "year": 2010}, {"source": "49", "target": "77", "source_name": "music theory", "target_name": "rock music", "weight": 3.0, "year": 2010}, {"source": "49", "target": "78", "source_name": "music theory", "target_name": "hip hop", "weight": 1.0, "year": 2010}, {"source": "49", "target": "88", "source_name": "music theory", "target_name": "oxford university press", "weight": 2.0, "year": 2010}, {"source": "49", "target": "89", "source_name": "music theory", "target_name": "electronic music", "weight": 1.0, "year": 2010}, {"source": "50", "target": "53", "source_name": "hollywood film", "target_name": "popular music", "weight": 1.0, "year": 2010}, {"source": "50", "target": "79", "source_name": "hollywood film", "target_name": "popular culture", "weight": 1.0, "year": 2010}, {"source": "51", "target": "52", "source_name": "cultural identity", "target_name": "folk song", "weight": 1.0, "year": 2010}, {"source": "51", "target": "53", "source_name": "cultural identity", "target_name": "popular music", "weight": 2.0, "year": 2010}, {"source": "51", "target": "60", "source_name": "cultural identity", "target_name": "cultural studies", "weight": 2.0, "year": 2010}, {"source": "51", "target": "65", "source_name": "cultural identity", "target_name": "country music", "weight": 1.0, "year": 2010}, {"source": "51", "target": "66", "source_name": "cultural identity", "target_name": "hong kong", "weight": 1.0, "year": 2010}, {"source": "51", "target": "72", "source_name": "cultural identity", "target_name": "jimi hendrix", "weight": 2.0, "year": 2010}, {"source": "51", "target": "74", "source_name": "cultural identity", "target_name": "united states", "weight": 2.0, "year": 2010}, {"source": "51", "target": "77", "source_name": "cultural identity", "target_name": "rock music", "weight": 6.0, "year": 2010}, {"source": "51", "target": "79", "source_name": "cultural identity", "target_name": "popular culture", "weight": 2.0, "year": 2010}, {"source": "51", "target": "80", "source_name": "cultural identity", "target_name": "folk music", "weight": 1.0, "year": 2010}, {"source": "52", "target": "53", "source_name": "folk song", "target_name": "popular music", "weight": 7.0, "year": 2010}, {"source": "52", "target": "54", "source_name": "folk song", "target_name": "american popular music", "weight": 1.0, "year": 2010}, {"source": "52", "target": "65", "source_name": "folk song", "target_name": "country music", "weight": 1.0, "year": 2010}, {"source": "52", "target": "66", "source_name": "folk song", "target_name": "hong kong", "weight": 1.0, "year": 2010}, {"source": "52", "target": "69", "source_name": "folk song", "target_name": "classical music", "weight": 2.0, "year": 2010}, {"source": "52", "target": "74", "source_name": "folk song", "target_name": "united states", "weight": 1.0, "year": 2010}, {"source": "52", "target": "77", "source_name": "folk song", "target_name": "rock music", "weight": 3.0, "year": 2010}, {"source": "52", "target": "80", "source_name": "folk song", "target_name": "folk music", "weight": 6.0, "year": 2010}, {"source": "52", "target": "87", "source_name": "folk song", "target_name": "music hall", "weight": 1.0, "year": 2010}, {"source": "52", "target": "89", "source_name": "folk song", "target_name": "electronic music", "weight": 1.0, "year": 2010}, {"source": "53", "target": "54", "source_name": "popular music", "target_name": "american popular music", "weight": 12.0, "year": 2010}, {"source": "53", "target": "55", "source_name": "popular music", "target_name": "rock criticism", "weight": 4.0, "year": 2010}, {"source": "53", "target": "56", "source_name": "popular music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2010}, {"source": "53", "target": "57", "source_name": "popular music", "target_name": "north america", "weight": 6.0, "year": 2010}, {"source": "53", "target": "58", "source_name": "popular music", "target_name": "music therapy", "weight": 1.0, "year": 2010}, {"source": "53", "target": "59", "source_name": "popular music", "target_name": "college students", "weight": 3.0, "year": 2010}, {"source": "53", "target": "60", "source_name": "popular music", "target_name": "cultural studies", "weight": 6.0, "year": 2010}, {"source": "53", "target": "61", "source_name": "popular music", "target_name": "progressive rock", "weight": 6.0, "year": 2010}, {"source": "53", "target": "62", "source_name": "popular music", "target_name": "led zeppelin", "weight": 2.0, "year": 2010}, {"source": "53", "target": "64", "source_name": "popular music", "target_name": "english language", "weight": 1.0, "year": 2010}, {"source": "53", "target": "65", "source_name": "popular music", "target_name": "country music", "weight": 11.0, "year": 2010}, {"source": "53", "target": "66", "source_name": "popular music", "target_name": "hong kong", "weight": 3.0, "year": 2010}, {"source": "53", "target": "67", "source_name": "popular music", "target_name": "rock art", "weight": 5.0, "year": 2010}, {"source": "53", "target": "69", "source_name": "popular music", "target_name": "classical music", "weight": 10.0, "year": 2010}, {"source": "53", "target": "70", "source_name": "popular music", "target_name": "world war", "weight": 6.0, "year": 2010}, {"source": "53", "target": "71", "source_name": "popular music", "target_name": "latin american", "weight": 2.0, "year": 2010}, {"source": "53", "target": "72", "source_name": "popular music", "target_name": "jimi hendrix", "weight": 5.0, "year": 2010}, {"source": "53", "target": "73", "source_name": "popular music", "target_name": "southern rock", "weight": 2.0, "year": 2010}, {"source": "53", "target": "74", "source_name": "popular music", "target_name": "united states", "weight": 16.0, "year": 2010}, {"source": "53", "target": "75", "source_name": "popular music", "target_name": "world war ii", "weight": 4.0, "year": 2010}, {"source": "53", "target": "76", "source_name": "popular music", "target_name": "los angeles", "weight": 6.0, "year": 2010}, {"source": "53", "target": "77", "source_name": "popular music", "target_name": "rock music", "weight": 88.0, "year": 2010}, {"source": "53", "target": "78", "source_name": "popular music", "target_name": "hip hop", "weight": 9.0, "year": 2010}, {"source": "53", "target": "79", "source_name": "popular music", "target_name": "popular culture", "weight": 17.0, "year": 2010}, {"source": "53", "target": "80", "source_name": "popular music", "target_name": "folk music", "weight": 13.0, "year": 2010}, {"source": "53", "target": "82", "source_name": "popular music", "target_name": "heavy metal", "weight": 8.0, "year": 2010}, {"source": "53", "target": "83", "source_name": "popular music", "target_name": "folk rock", "weight": 2.0, "year": 2010}, {"source": "53", "target": "85", "source_name": "popular music", "target_name": "jewish music", "weight": 1.0, "year": 2010}, {"source": "53", "target": "87", "source_name": "popular music", "target_name": "music hall", "weight": 2.0, "year": 2010}, {"source": "53", "target": "88", "source_name": "popular music", "target_name": "oxford university press", "weight": 4.0, "year": 2010}, {"source": "53", "target": "89", "source_name": "popular music", "target_name": "electronic music", "weight": 5.0, "year": 2010}, {"source": "54", "target": "55", "source_name": "american popular music", "target_name": "rock criticism", "weight": 1.0, "year": 2010}, {"source": "54", "target": "65", "source_name": "american popular music", "target_name": "country music", "weight": 5.0, "year": 2010}, {"source": "54", "target": "69", "source_name": "american popular music", "target_name": "classical music", "weight": 3.0, "year": 2010}, {"source": "54", "target": "70", "source_name": "american popular music", "target_name": "world war", "weight": 1.0, "year": 2010}, {"source": "54", "target": "71", "source_name": "american popular music", "target_name": "latin american", "weight": 1.0, "year": 2010}, {"source": "54", "target": "74", "source_name": "american popular music", "target_name": "united states", "weight": 4.0, "year": 2010}, {"source": "54", "target": "75", "source_name": "american popular music", "target_name": "world war ii", "weight": 1.0, "year": 2010}, {"source": "54", "target": "76", "source_name": "american popular music", "target_name": "los angeles", "weight": 1.0, "year": 2010}, {"source": "54", "target": "77", "source_name": "american popular music", "target_name": "rock music", "weight": 2.0, "year": 2010}, {"source": "54", "target": "78", "source_name": "american popular music", "target_name": "hip hop", "weight": 2.0, "year": 2010}, {"source": "54", "target": "79", "source_name": "american popular music", "target_name": "popular culture", "weight": 1.0, "year": 2010}, {"source": "54", "target": "80", "source_name": "american popular music", "target_name": "folk music", "weight": 1.0, "year": 2010}, {"source": "54", "target": "88", "source_name": "american popular music", "target_name": "oxford university press", "weight": 1.0, "year": 2010}, {"source": "54", "target": "89", "source_name": "american popular music", "target_name": "electronic music", "weight": 1.0, "year": 2010}, {"source": "55", "target": "57", "source_name": "rock criticism", "target_name": "north america", "weight": 1.0, "year": 2010}, {"source": "55", "target": "61", "source_name": "rock criticism", "target_name": "progressive rock", "weight": 2.0, "year": 2010}, {"source": "55", "target": "65", "source_name": "rock criticism", "target_name": "country music", "weight": 1.0, "year": 2010}, {"source": "55", "target": "69", "source_name": "rock criticism", "target_name": "classical music", "weight": 1.0, "year": 2010}, {"source": "55", "target": "74", "source_name": "rock criticism", "target_name": "united states", "weight": 2.0, "year": 2010}, {"source": "55", "target": "77", "source_name": "rock criticism", "target_name": "rock music", "weight": 4.0, "year": 2010}, {"source": "55", "target": "78", "source_name": "rock criticism", "target_name": "hip hop", "weight": 1.0, "year": 2010}, {"source": "55", "target": "88", "source_name": "rock criticism", "target_name": "oxford university press", "weight": 1.0, "year": 2010}, {"source": "56", "target": "72", "source_name": "bruce springsteen", "target_name": "jimi hendrix", "weight": 1.0, "year": 2010}, {"source": "56", "target": "77", "source_name": "bruce springsteen", "target_name": "rock music", "weight": 2.0, "year": 2010}, {"source": "56", "target": "78", "source_name": "bruce springsteen", "target_name": "hip hop", "weight": 1.0, "year": 2010}, {"source": "56", "target": "79", "source_name": "bruce springsteen", "target_name": "popular culture", "weight": 1.0, "year": 2010}, {"source": "56", "target": "82", "source_name": "bruce springsteen", "target_name": "heavy metal", "weight": 1.0, "year": 2010}, {"source": "57", "target": "61", "source_name": "north america", "target_name": "progressive rock", "weight": 1.0, "year": 2010}, {"source": "57", "target": "65", "source_name": "north america", "target_name": "country music", "weight": 2.0, "year": 2010}, {"source": "57", "target": "71", "source_name": "north america", "target_name": "latin american", "weight": 1.0, "year": 2010}, {"source": "57", "target": "73", "source_name": "north america", "target_name": "southern rock", "weight": 1.0, "year": 2010}, {"source": "57", "target": "74", "source_name": "north america", "target_name": "united states", "weight": 3.0, "year": 2010}, {"source": "57", "target": "77", "source_name": "north america", "target_name": "rock music", "weight": 4.0, "year": 2010}, {"source": "57", "target": "78", "source_name": "north america", "target_name": "hip hop", "weight": 1.0, "year": 2010}, {"source": "57", "target": "80", "source_name": "north america", "target_name": "folk music", "weight": 2.0, "year": 2010}, {"source": "58", "target": "64", "source_name": "music therapy", "target_name": "english language", "weight": 1.0, "year": 2010}, {"source": "58", "target": "77", "source_name": "music therapy", "target_name": "rock music", "weight": 3.0, "year": 2010}, {"source": "59", "target": "69", "source_name": "college students", "target_name": "classical music", "weight": 1.0, "year": 2010}, {"source": "59", "target": "74", "source_name": "college students", "target_name": "united states", "weight": 1.0, "year": 2010}, {"source": "59", "target": "77", "source_name": "college students", "target_name": "rock music", "weight": 2.0, "year": 2010}, {"source": "59", "target": "82", "source_name": "college students", "target_name": "heavy metal", "weight": 1.0, "year": 2010}, {"source": "60", "target": "62", "source_name": "cultural studies", "target_name": "led zeppelin", "weight": 1.0, "year": 2010}, {"source": "60", "target": "71", "source_name": "cultural studies", "target_name": "latin american", "weight": 1.0, "year": 2010}, {"source": "60", "target": "74", "source_name": "cultural studies", "target_name": "united states", "weight": 1.0, "year": 2010}, {"source": "60", "target": "76", "source_name": "cultural studies", "target_name": "los angeles", "weight": 1.0, "year": 2010}, {"source": "60", "target": "77", "source_name": "cultural studies", "target_name": "rock music", "weight": 5.0, "year": 2010}, {"source": "60", "target": "79", "source_name": "cultural studies", "target_name": "popular culture", "weight": 4.0, "year": 2010}, {"source": "60", "target": "80", "source_name": "cultural studies", "target_name": "folk music", "weight": 1.0, "year": 2010}, {"source": "60", "target": "85", "source_name": "cultural studies", "target_name": "jewish music", "weight": 1.0, "year": 2010}, {"source": "60", "target": "87", "source_name": "cultural studies", "target_name": "music hall", "weight": 1.0, "year": 2010}, {"source": "60", "target": "88", "source_name": "cultural studies", "target_name": "oxford university press", "weight": 3.0, "year": 2010}, {"source": "60", "target": "89", "source_name": "cultural studies", "target_name": "electronic music", "weight": 1.0, "year": 2010}, {"source": "61", "target": "69", "source_name": "progressive rock", "target_name": "classical music", "weight": 2.0, "year": 2010}, {"source": "61", "target": "72", "source_name": "progressive rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2010}, {"source": "61", "target": "74", "source_name": "progressive rock", "target_name": "united states", "weight": 1.0, "year": 2010}, {"source": "61", "target": "77", "source_name": "progressive rock", "target_name": "rock music", "weight": 16.0, "year": 2010}, {"source": "61", "target": "80", "source_name": "progressive rock", "target_name": "folk music", "weight": 1.0, "year": 2010}, {"source": "61", "target": "82", "source_name": "progressive rock", "target_name": "heavy metal", "weight": 1.0, "year": 2010}, {"source": "61", "target": "88", "source_name": "progressive rock", "target_name": "oxford university press", "weight": 1.0, "year": 2010}, {"source": "61", "target": "89", "source_name": "progressive rock", "target_name": "electronic music", "weight": 1.0, "year": 2010}, {"source": "62", "target": "69", "source_name": "led zeppelin", "target_name": "classical music", "weight": 1.0, "year": 2010}, {"source": "62", "target": "77", "source_name": "led zeppelin", "target_name": "rock music", "weight": 1.0, "year": 2010}, {"source": "62", "target": "88", "source_name": "led zeppelin", "target_name": "oxford university press", "weight": 1.0, "year": 2010}, {"source": "64", "target": "66", "source_name": "english language", "target_name": "hong kong", "weight": 1.0, "year": 2010}, {"source": "64", "target": "67", "source_name": "english language", "target_name": "rock art", "weight": 1.0, "year": 2010}, {"source": "64", "target": "70", "source_name": "english language", "target_name": "world war", "weight": 1.0, "year": 2010}, {"source": "64", "target": "74", "source_name": "english language", "target_name": "united states", "weight": 1.0, "year": 2010}, {"source": "64", "target": "77", "source_name": "english language", "target_name": "rock music", "weight": 2.0, "year": 2010}, {"source": "64", "target": "79", "source_name": "english language", "target_name": "popular culture", "weight": 1.0, "year": 2010}, {"source": "64", "target": "83", "source_name": "english language", "target_name": "folk rock", "weight": 1.0, "year": 2010}, {"source": "65", "target": "69", "source_name": "country music", "target_name": "classical music", "weight": 3.0, "year": 2010}, {"source": "65", "target": "72", "source_name": "country music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2010}, {"source": "65", "target": "73", "source_name": "country music", "target_name": "southern rock", "weight": 2.0, "year": 2010}, {"source": "65", "target": "74", "source_name": "country music", "target_name": "united states", "weight": 3.0, "year": 2010}, {"source": "65", "target": "77", "source_name": "country music", "target_name": "rock music", "weight": 4.0, "year": 2010}, {"source": "65", "target": "78", "source_name": "country music", "target_name": "hip hop", "weight": 1.0, "year": 2010}, {"source": "65", "target": "79", "source_name": "country music", "target_name": "popular culture", "weight": 2.0, "year": 2010}, {"source": "65", "target": "80", "source_name": "country music", "target_name": "folk music", "weight": 3.0, "year": 2010}, {"source": "65", "target": "82", "source_name": "country music", "target_name": "heavy metal", "weight": 1.0, "year": 2010}, {"source": "65", "target": "89", "source_name": "country music", "target_name": "electronic music", "weight": 2.0, "year": 2010}, {"source": "66", "target": "67", "source_name": "hong kong", "target_name": "rock art", "weight": 1.0, "year": 2010}, {"source": "66", "target": "77", "source_name": "hong kong", "target_name": "rock music", "weight": 2.0, "year": 2010}, {"source": "66", "target": "83", "source_name": "hong kong", "target_name": "folk rock", "weight": 1.0, "year": 2010}, {"source": "67", "target": "77", "source_name": "rock art", "target_name": "rock music", "weight": 4.0, "year": 2010}, {"source": "67", "target": "79", "source_name": "rock art", "target_name": "popular culture", "weight": 1.0, "year": 2010}, {"source": "67", "target": "83", "source_name": "rock art", "target_name": "folk rock", "weight": 1.0, "year": 2010}, {"source": "68", "target": "77", "source_name": "hearing loss", "target_name": "rock music", "weight": 3.0, "year": 2010}, {"source": "69", "target": "71", "source_name": "classical music", "target_name": "latin american", "weight": 1.0, "year": 2010}, {"source": "69", "target": "72", "source_name": "classical music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2010}, {"source": "69", "target": "74", "source_name": "classical music", "target_name": "united states", "weight": 4.0, "year": 2010}, {"source": "69", "target": "76", "source_name": "classical music", "target_name": "los angeles", "weight": 1.0, "year": 2010}, {"source": "69", "target": "77", "source_name": "classical music", "target_name": "rock music", "weight": 25.0, "year": 2010}, {"source": "69", "target": "78", "source_name": "classical music", "target_name": "hip hop", "weight": 2.0, "year": 2010}, {"source": "69", "target": "79", "source_name": "classical music", "target_name": "popular culture", "weight": 2.0, "year": 2010}, {"source": "69", "target": "80", "source_name": "classical music", "target_name": "folk music", "weight": 4.0, "year": 2010}, {"source": "69", "target": "82", "source_name": "classical music", "target_name": "heavy metal", "weight": 3.0, "year": 2010}, {"source": "69", "target": "87", "source_name": "classical music", "target_name": "music hall", "weight": 1.0, "year": 2010}, {"source": "69", "target": "88", "source_name": "classical music", "target_name": "oxford university press", "weight": 1.0, "year": 2010}, {"source": "69", "target": "89", "source_name": "classical music", "target_name": "electronic music", "weight": 2.0, "year": 2010}, {"source": "70", "target": "74", "source_name": "world war", "target_name": "united states", "weight": 2.0, "year": 2010}, {"source": "70", "target": "75", "source_name": "world war", "target_name": "world war ii", "weight": 4.0, "year": 2010}, {"source": "70", "target": "77", "source_name": "world war", "target_name": "rock music", "weight": 6.0, "year": 2010}, {"source": "70", "target": "79", "source_name": "world war", "target_name": "popular culture", "weight": 1.0, "year": 2010}, {"source": "70", "target": "80", "source_name": "world war", "target_name": "folk music", "weight": 1.0, "year": 2010}, {"source": "70", "target": "87", "source_name": "world war", "target_name": "music hall", "weight": 1.0, "year": 2010}, {"source": "70", "target": "89", "source_name": "world war", "target_name": "electronic music", "weight": 1.0, "year": 2010}, {"source": "71", "target": "74", "source_name": "latin american", "target_name": "united states", "weight": 3.0, "year": 2010}, {"source": "71", "target": "76", "source_name": "latin american", "target_name": "los angeles", "weight": 2.0, "year": 2010}, {"source": "71", "target": "77", "source_name": "latin american", "target_name": "rock music", "weight": 4.0, "year": 2010}, {"source": "71", "target": "79", "source_name": "latin american", "target_name": "popular culture", "weight": 1.0, "year": 2010}, {"source": "72", "target": "74", "source_name": "jimi hendrix", "target_name": "united states", "weight": 1.0, "year": 2010}, {"source": "72", "target": "77", "source_name": "jimi hendrix", "target_name": "rock music", "weight": 6.0, "year": 2010}, {"source": "72", "target": "79", "source_name": "jimi hendrix", "target_name": "popular culture", "weight": 2.0, "year": 2010}, {"source": "72", "target": "80", "source_name": "jimi hendrix", "target_name": "folk music", "weight": 1.0, "year": 2010}, {"source": "72", "target": "89", "source_name": "jimi hendrix", "target_name": "electronic music", "weight": 1.0, "year": 2010}, {"source": "73", "target": "77", "source_name": "southern rock", "target_name": "rock music", "weight": 1.0, "year": 2010}, {"source": "73", "target": "80", "source_name": "southern rock", "target_name": "folk music", "weight": 1.0, "year": 2010}, {"source": "74", "target": "76", "source_name": "united states", "target_name": "los angeles", "weight": 1.0, "year": 2010}, {"source": "74", "target": "77", "source_name": "united states", "target_name": "rock music", "weight": 10.0, "year": 2010}, {"source": "74", "target": "78", "source_name": "united states", "target_name": "hip hop", "weight": 1.0, "year": 2010}, {"source": "74", "target": "79", "source_name": "united states", "target_name": "popular culture", "weight": 3.0, "year": 2010}, {"source": "74", "target": "80", "source_name": "united states", "target_name": "folk music", "weight": 3.0, "year": 2010}, {"source": "74", "target": "88", "source_name": "united states", "target_name": "oxford university press", "weight": 1.0, "year": 2010}, {"source": "74", "target": "89", "source_name": "united states", "target_name": "electronic music", "weight": 2.0, "year": 2010}, {"source": "75", "target": "77", "source_name": "world war ii", "target_name": "rock music", "weight": 2.0, "year": 2010}, {"source": "76", "target": "77", "source_name": "los angeles", "target_name": "rock music", "weight": 6.0, "year": 2010}, {"source": "76", "target": "79", "source_name": "los angeles", "target_name": "popular culture", "weight": 1.0, "year": 2010}, {"source": "77", "target": "78", "source_name": "rock music", "target_name": "hip hop", "weight": 3.0, "year": 2010}, {"source": "77", "target": "79", "source_name": "rock music", "target_name": "popular culture", "weight": 15.0, "year": 2010}, {"source": "77", "target": "80", "source_name": "rock music", "target_name": "folk music", "weight": 8.0, "year": 2010}, {"source": "77", "target": "82", "source_name": "rock music", "target_name": "heavy metal", "weight": 9.0, "year": 2010}, {"source": "77", "target": "87", "source_name": "rock music", "target_name": "music hall", "weight": 3.0, "year": 2010}, {"source": "77", "target": "88", "source_name": "rock music", "target_name": "oxford university press", "weight": 2.0, "year": 2010}, {"source": "77", "target": "89", "source_name": "rock music", "target_name": "electronic music", "weight": 4.0, "year": 2010}, {"source": "78", "target": "79", "source_name": "hip hop", "target_name": "popular culture", "weight": 2.0, "year": 2010}, {"source": "78", "target": "80", "source_name": "hip hop", "target_name": "folk music", "weight": 2.0, "year": 2010}, {"source": "78", "target": "82", "source_name": "hip hop", "target_name": "heavy metal", "weight": 2.0, "year": 2010}, {"source": "78", "target": "88", "source_name": "hip hop", "target_name": "oxford university press", "weight": 1.0, "year": 2010}, {"source": "79", "target": "80", "source_name": "popular culture", "target_name": "folk music", "weight": 2.0, "year": 2010}, {"source": "79", "target": "82", "source_name": "popular culture", "target_name": "heavy metal", "weight": 2.0, "year": 2010}, {"source": "79", "target": "85", "source_name": "popular culture", "target_name": "jewish music", "weight": 1.0, "year": 2010}, {"source": "79", "target": "87", "source_name": "popular culture", "target_name": "music hall", "weight": 2.0, "year": 2010}, {"source": "79", "target": "88", "source_name": "popular culture", "target_name": "oxford university press", "weight": 1.0, "year": 2010}, {"source": "79", "target": "89", "source_name": "popular culture", "target_name": "electronic music", "weight": 1.0, "year": 2010}, {"source": "80", "target": "85", "source_name": "folk music", "target_name": "jewish music", "weight": 1.0, "year": 2010}, {"source": "80", "target": "87", "source_name": "folk music", "target_name": "music hall", "weight": 1.0, "year": 2010}, {"source": "80", "target": "88", "source_name": "folk music", "target_name": "oxford university press", "weight": 1.0, "year": 2010}, {"source": "80", "target": "89", "source_name": "folk music", "target_name": "electronic music", "weight": 3.0, "year": 2010}, {"source": "85", "target": "88", "source_name": "jewish music", "target_name": "oxford university press", "weight": 1.0, "year": 2010}, {"source": "88", "target": "89", "source_name": "oxford university press", "target_name": "electronic music", "weight": 1.0, "year": 2010}]}, {"2011": [{"source": "1", "target": "7", "source_name": "rock star", "target_name": "nineteenth century", "weight": 1.0, "year": 2011}, {"source": "1", "target": "9", "source_name": "rock star", "target_name": "compact disc", "weight": 1.0, "year": 2011}, {"source": "1", "target": "19", "source_name": "rock star", "target_name": "music video", "weight": 1.0, "year": 2011}, {"source": "1", "target": "28", "source_name": "rock star", "target_name": "high school", "weight": 1.0, "year": 2011}, {"source": "1", "target": "29", "source_name": "rock star", "target_name": "rolling stone", "weight": 1.0, "year": 2011}, {"source": "1", "target": "36", "source_name": "rock star", "target_name": "music industry", "weight": 2.0, "year": 2011}, {"source": "1", "target": "41", "source_name": "rock star", "target_name": "youth culture", "weight": 2.0, "year": 2011}, {"source": "1", "target": "48", "source_name": "rock star", "target_name": "pop music", "weight": 4.0, "year": 2011}, {"source": "1", "target": "51", "source_name": "rock star", "target_name": "cultural identity", "weight": 1.0, "year": 2011}, {"source": "1", "target": "53", "source_name": "rock star", "target_name": "popular music", "weight": 3.0, "year": 2011}, {"source": "1", "target": "69", "source_name": "rock star", "target_name": "classical music", "weight": 1.0, "year": 2011}, {"source": "1", "target": "74", "source_name": "rock star", "target_name": "united states", "weight": 1.0, "year": 2011}, {"source": "1", "target": "77", "source_name": "rock star", "target_name": "rock music", "weight": 7.0, "year": 2011}, {"source": "1", "target": "82", "source_name": "rock star", "target_name": "heavy metal", "weight": 2.0, "year": 2011}, {"source": "2", "target": "3", "source_name": "indie rock", "target_name": "glam rock", "weight": 1.0, "year": 2011}, {"source": "2", "target": "19", "source_name": "indie rock", "target_name": "music video", "weight": 1.0, "year": 2011}, {"source": "2", "target": "20", "source_name": "indie rock", "target_name": "garage rock", "weight": 1.0, "year": 2011}, {"source": "2", "target": "24", "source_name": "indie rock", "target_name": "punk rock", "weight": 1.0, "year": 2011}, {"source": "2", "target": "27", "source_name": "indie rock", "target_name": "pop rock", "weight": 1.0, "year": 2011}, {"source": "2", "target": "36", "source_name": "indie rock", "target_name": "music industry", "weight": 1.0, "year": 2011}, {"source": "2", "target": "44", "source_name": "indie rock", "target_name": "alternative rock", "weight": 1.0, "year": 2011}, {"source": "2", "target": "47", "source_name": "indie rock", "target_name": "hard rock", "weight": 1.0, "year": 2011}, {"source": "2", "target": "48", "source_name": "indie rock", "target_name": "pop music", "weight": 2.0, "year": 2011}, {"source": "2", "target": "51", "source_name": "indie rock", "target_name": "cultural identity", "weight": 1.0, "year": 2011}, {"source": "2", "target": "53", "source_name": "indie rock", "target_name": "popular music", "weight": 2.0, "year": 2011}, {"source": "2", "target": "67", "source_name": "indie rock", "target_name": "rock art", "weight": 1.0, "year": 2011}, {"source": "2", "target": "72", "source_name": "indie rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2011}, {"source": "2", "target": "74", "source_name": "indie rock", "target_name": "united states", "weight": 1.0, "year": 2011}, {"source": "2", "target": "77", "source_name": "indie rock", "target_name": "rock music", "weight": 5.0, "year": 2011}, {"source": "2", "target": "78", "source_name": "indie rock", "target_name": "hip hop", "weight": 1.0, "year": 2011}, {"source": "2", "target": "80", "source_name": "indie rock", "target_name": "folk music", "weight": 1.0, "year": 2011}, {"source": "3", "target": "20", "source_name": "glam rock", "target_name": "garage rock", "weight": 1.0, "year": 2011}, {"source": "3", "target": "24", "source_name": "glam rock", "target_name": "punk rock", "weight": 1.0, "year": 2011}, {"source": "3", "target": "27", "source_name": "glam rock", "target_name": "pop rock", "weight": 1.0, "year": 2011}, {"source": "3", "target": "44", "source_name": "glam rock", "target_name": "alternative rock", "weight": 1.0, "year": 2011}, {"source": "3", "target": "47", "source_name": "glam rock", "target_name": "hard rock", "weight": 1.0, "year": 2011}, {"source": "3", "target": "77", "source_name": "glam rock", "target_name": "rock music", "weight": 1.0, "year": 2011}, {"source": "3", "target": "79", "source_name": "glam rock", "target_name": "popular culture", "weight": 1.0, "year": 2011}, {"source": "4", "target": "7", "source_name": "gregorian chant", "target_name": "nineteenth century", "weight": 1.0, "year": 2011}, {"source": "4", "target": "9", "source_name": "gregorian chant", "target_name": "compact disc", "weight": 1.0, "year": 2011}, {"source": "4", "target": "10", "source_name": "gregorian chant", "target_name": "african american", "weight": 1.0, "year": 2011}, {"source": "4", "target": "19", "source_name": "gregorian chant", "target_name": "music video", "weight": 1.0, "year": 2011}, {"source": "4", "target": "22", "source_name": "gregorian chant", "target_name": "chamber music", "weight": 1.0, "year": 2011}, {"source": "4", "target": "36", "source_name": "gregorian chant", "target_name": "music industry", "weight": 1.0, "year": 2011}, {"source": "4", "target": "37", "source_name": "gregorian chant", "target_name": "middle ages", "weight": 1.0, "year": 2011}, {"source": "4", "target": "38", "source_name": "gregorian chant", "target_name": "summary additional listening", "weight": 1.0, "year": 2011}, {"source": "4", "target": "40", "source_name": "gregorian chant", "target_name": "musical instruments", "weight": 1.0, "year": 2011}, {"source": "4", "target": "48", "source_name": "gregorian chant", "target_name": "pop music", "weight": 1.0, "year": 2011}, {"source": "4", "target": "52", "source_name": "gregorian chant", "target_name": "folk song", "weight": 1.0, "year": 2011}, {"source": "4", "target": "53", "source_name": "gregorian chant", "target_name": "popular music", "weight": 1.0, "year": 2011}, {"source": "4", "target": "54", "source_name": "gregorian chant", "target_name": "american popular music", "weight": 1.0, "year": 2011}, {"source": "4", "target": "65", "source_name": "gregorian chant", "target_name": "country music", "weight": 1.0, "year": 2011}, {"source": "4", "target": "69", "source_name": "gregorian chant", "target_name": "classical music", "weight": 1.0, "year": 2011}, {"source": "4", "target": "74", "source_name": "gregorian chant", "target_name": "united states", "weight": 1.0, "year": 2011}, {"source": "4", "target": "80", "source_name": "gregorian chant", "target_name": "folk music", "weight": 1.0, "year": 2011}, {"source": "4", "target": "89", "source_name": "gregorian chant", "target_name": "electronic music", "weight": 1.0, "year": 2011}, {"source": "5", "target": "12", "source_name": "jesus christ superstar", "target_name": "rock opera", "weight": 2.0, "year": 2011}, {"source": "5", "target": "15", "source_name": "jesus christ superstar", "target_name": "musical theatre", "weight": 2.0, "year": 2011}, {"source": "5", "target": "33", "source_name": "jesus christ superstar", "target_name": "jesus christ", "weight": 3.0, "year": 2011}, {"source": "5", "target": "34", "source_name": "jesus christ superstar", "target_name": "mass media", "weight": 1.0, "year": 2011}, {"source": "5", "target": "41", "source_name": "jesus christ superstar", "target_name": "youth culture", "weight": 1.0, "year": 2011}, {"source": "5", "target": "53", "source_name": "jesus christ superstar", "target_name": "popular music", "weight": 1.0, "year": 2011}, {"source": "5", "target": "77", "source_name": "jesus christ superstar", "target_name": "rock music", "weight": 5.0, "year": 2011}, {"source": "6", "target": "10", "source_name": "elvis presley", "target_name": "african american", "weight": 1.0, "year": 2011}, {"source": "6", "target": "16", "source_name": "elvis presley", "target_name": "bob dylan", "weight": 3.0, "year": 2011}, {"source": "6", "target": "17", "source_name": "elvis presley", "target_name": "civil rights", "weight": 1.0, "year": 2011}, {"source": "6", "target": "23", "source_name": "elvis presley", "target_name": "electronic dance music", "weight": 1.0, "year": 2011}, {"source": "6", "target": "29", "source_name": "elvis presley", "target_name": "rolling stone", "weight": 1.0, "year": 2011}, {"source": "6", "target": "36", "source_name": "elvis presley", "target_name": "music industry", "weight": 3.0, "year": 2011}, {"source": "6", "target": "40", "source_name": "elvis presley", "target_name": "musical instruments", "weight": 1.0, "year": 2011}, {"source": "6", "target": "41", "source_name": "elvis presley", "target_name": "youth culture", "weight": 1.0, "year": 2011}, {"source": "6", "target": "42", "source_name": "elvis presley", "target_name": "simon frith", "weight": 2.0, "year": 2011}, {"source": "6", "target": "47", "source_name": "elvis presley", "target_name": "hard rock", "weight": 1.0, "year": 2011}, {"source": "6", "target": "48", "source_name": "elvis presley", "target_name": "pop music", "weight": 1.0, "year": 2011}, {"source": "6", "target": "51", "source_name": "elvis presley", "target_name": "cultural identity", "weight": 1.0, "year": 2011}, {"source": "6", "target": "53", "source_name": "elvis presley", "target_name": "popular music", "weight": 6.0, "year": 2011}, {"source": "6", "target": "54", "source_name": "elvis presley", "target_name": "american popular music", "weight": 3.0, "year": 2011}, {"source": "6", "target": "56", "source_name": "elvis presley", "target_name": "bruce springsteen", "weight": 1.0, "year": 2011}, {"source": "6", "target": "60", "source_name": "elvis presley", "target_name": "cultural studies", "weight": 1.0, "year": 2011}, {"source": "6", "target": "67", "source_name": "elvis presley", "target_name": "rock art", "weight": 1.0, "year": 2011}, {"source": "6", "target": "70", "source_name": "elvis presley", "target_name": "world war", "weight": 1.0, "year": 2011}, {"source": "6", "target": "72", "source_name": "elvis presley", "target_name": "jimi hendrix", "weight": 1.0, "year": 2011}, {"source": "6", "target": "74", "source_name": "elvis presley", "target_name": "united states", "weight": 2.0, "year": 2011}, {"source": "6", "target": "75", "source_name": "elvis presley", "target_name": "world war ii", "weight": 1.0, "year": 2011}, {"source": "6", "target": "77", "source_name": "elvis presley", "target_name": "rock music", "weight": 3.0, "year": 2011}, {"source": "6", "target": "78", "source_name": "elvis presley", "target_name": "hip hop", "weight": 1.0, "year": 2011}, {"source": "6", "target": "79", "source_name": "elvis presley", "target_name": "popular culture", "weight": 1.0, "year": 2011}, {"source": "6", "target": "80", "source_name": "elvis presley", "target_name": "folk music", "weight": 1.0, "year": 2011}, {"source": "6", "target": "82", "source_name": "elvis presley", "target_name": "heavy metal", "weight": 1.0, "year": 2011}, {"source": "7", "target": "9", "source_name": "nineteenth century", "target_name": "compact disc", "weight": 1.0, "year": 2011}, {"source": "7", "target": "10", "source_name": "nineteenth century", "target_name": "african american", "weight": 1.0, "year": 2011}, {"source": "7", "target": "19", "source_name": "nineteenth century", "target_name": "music video", "weight": 1.0, "year": 2011}, {"source": "7", "target": "22", "source_name": "nineteenth century", "target_name": "chamber music", "weight": 1.0, "year": 2011}, {"source": "7", "target": "34", "source_name": "nineteenth century", "target_name": "mass media", "weight": 1.0, "year": 2011}, {"source": "7", "target": "36", "source_name": "nineteenth century", "target_name": "music industry", "weight": 1.0, "year": 2011}, {"source": "7", "target": "38", "source_name": "nineteenth century", "target_name": "summary additional listening", "weight": 1.0, "year": 2011}, {"source": "7", "target": "40", "source_name": "nineteenth century", "target_name": "musical instruments", "weight": 1.0, "year": 2011}, {"source": "7", "target": "43", "source_name": "nineteenth century", "target_name": "music education", "weight": 1.0, "year": 2011}, {"source": "7", "target": "50", "source_name": "nineteenth century", "target_name": "hollywood film", "weight": 1.0, "year": 2011}, {"source": "7", "target": "52", "source_name": "nineteenth century", "target_name": "folk song", "weight": 2.0, "year": 2011}, {"source": "7", "target": "53", "source_name": "nineteenth century", "target_name": "popular music", "weight": 3.0, "year": 2011}, {"source": "7", "target": "54", "source_name": "nineteenth century", "target_name": "american popular music", "weight": 1.0, "year": 2011}, {"source": "7", "target": "65", "source_name": "nineteenth century", "target_name": "country music", "weight": 1.0, "year": 2011}, {"source": "7", "target": "67", "source_name": "nineteenth century", "target_name": "rock art", "weight": 1.0, "year": 2011}, {"source": "7", "target": "69", "source_name": "nineteenth century", "target_name": "classical music", "weight": 2.0, "year": 2011}, {"source": "7", "target": "70", "source_name": "nineteenth century", "target_name": "world war", "weight": 2.0, "year": 2011}, {"source": "7", "target": "74", "source_name": "nineteenth century", "target_name": "united states", "weight": 2.0, "year": 2011}, {"source": "7", "target": "77", "source_name": "nineteenth century", "target_name": "rock music", "weight": 1.0, "year": 2011}, {"source": "7", "target": "79", "source_name": "nineteenth century", "target_name": "popular culture", "weight": 1.0, "year": 2011}, {"source": "7", "target": "80", "source_name": "nineteenth century", "target_name": "folk music", "weight": 1.0, "year": 2011}, {"source": "7", "target": "85", "source_name": "nineteenth century", "target_name": "jewish music", "weight": 1.0, "year": 2011}, {"source": "7", "target": "89", "source_name": "nineteenth century", "target_name": "electronic music", "weight": 1.0, "year": 2011}, {"source": "8", "target": "20", "source_name": "christian rock", "target_name": "garage rock", "weight": 1.0, "year": 2011}, {"source": "8", "target": "36", "source_name": "christian rock", "target_name": "music industry", "weight": 1.0, "year": 2011}, {"source": "8", "target": "44", "source_name": "christian rock", "target_name": "alternative rock", "weight": 1.0, "year": 2011}, {"source": "8", "target": "53", "source_name": "christian rock", "target_name": "popular music", "weight": 2.0, "year": 2011}, {"source": "8", "target": "57", "source_name": "christian rock", "target_name": "north america", "weight": 1.0, "year": 2011}, {"source": "8", "target": "65", "source_name": "christian rock", "target_name": "country music", "weight": 1.0, "year": 2011}, {"source": "8", "target": "73", "source_name": "christian rock", "target_name": "southern rock", "weight": 1.0, "year": 2011}, {"source": "8", "target": "77", "source_name": "christian rock", "target_name": "rock music", "weight": 1.0, "year": 2011}, {"source": "8", "target": "79", "source_name": "christian rock", "target_name": "popular culture", "weight": 1.0, "year": 2011}, {"source": "8", "target": "80", "source_name": "christian rock", "target_name": "folk music", "weight": 1.0, "year": 2011}, {"source": "9", "target": "10", "source_name": "compact disc", "target_name": "african american", "weight": 1.0, "year": 2011}, {"source": "9", "target": "11", "source_name": "compact disc", "target_name": "south africa", "weight": 1.0, "year": 2011}, {"source": "9", "target": "18", "source_name": "compact disc", "target_name": "middle class", "weight": 1.0, "year": 2011}, {"source": "9", "target": "19", "source_name": "compact disc", "target_name": "music video", "weight": 1.0, "year": 2011}, {"source": "9", "target": "24", "source_name": "compact disc", "target_name": "punk rock", "weight": 1.0, "year": 2011}, {"source": "9", "target": "25", "source_name": "compact disc", "target_name": "russian rock", "weight": 1.0, "year": 2011}, {"source": "9", "target": "28", "source_name": "compact disc", "target_name": "high school", "weight": 1.0, "year": 2011}, {"source": "9", "target": "29", "source_name": "compact disc", "target_name": "rolling stone", "weight": 1.0, "year": 2011}, {"source": "9", "target": "30", "source_name": "compact disc", "target_name": "rock band", "weight": 1.0, "year": 2011}, {"source": "9", "target": "36", "source_name": "compact disc", "target_name": "music industry", "weight": 1.0, "year": 2011}, {"source": "9", "target": "37", "source_name": "compact disc", "target_name": "middle ages", "weight": 1.0, "year": 2011}, {"source": "9", "target": "46", "source_name": "compact disc", "target_name": "music festival", "weight": 1.0, "year": 2011}, {"source": "9", "target": "48", "source_name": "compact disc", "target_name": "pop music", "weight": 1.0, "year": 2011}, {"source": "9", "target": "53", "source_name": "compact disc", "target_name": "popular music", "weight": 4.0, "year": 2011}, {"source": "9", "target": "61", "source_name": "compact disc", "target_name": "progressive rock", "weight": 1.0, "year": 2011}, {"source": "9", "target": "66", "source_name": "compact disc", "target_name": "hong kong", "weight": 1.0, "year": 2011}, {"source": "9", "target": "74", "source_name": "compact disc", "target_name": "united states", "weight": 1.0, "year": 2011}, {"source": "9", "target": "77", "source_name": "compact disc", "target_name": "rock music", "weight": 2.0, "year": 2011}, {"source": "9", "target": "78", "source_name": "compact disc", "target_name": "hip hop", "weight": 1.0, "year": 2011}, {"source": "9", "target": "79", "source_name": "compact disc", "target_name": "popular culture", "weight": 1.0, "year": 2011}, {"source": "9", "target": "80", "source_name": "compact disc", "target_name": "folk music", "weight": 3.0, "year": 2011}, {"source": "9", "target": "85", "source_name": "compact disc", "target_name": "jewish music", "weight": 2.0, "year": 2011}, {"source": "9", "target": "89", "source_name": "compact disc", "target_name": "electronic music", "weight": 1.0, "year": 2011}, {"source": "10", "target": "15", "source_name": "african american", "target_name": "musical theatre", "weight": 1.0, "year": 2011}, {"source": "10", "target": "17", "source_name": "african american", "target_name": "civil rights", "weight": 1.0, "year": 2011}, {"source": "10", "target": "19", "source_name": "african american", "target_name": "music video", "weight": 1.0, "year": 2011}, {"source": "10", "target": "22", "source_name": "african american", "target_name": "chamber music", "weight": 1.0, "year": 2011}, {"source": "10", "target": "24", "source_name": "african american", "target_name": "punk rock", "weight": 2.0, "year": 2011}, {"source": "10", "target": "36", "source_name": "african american", "target_name": "music industry", "weight": 2.0, "year": 2011}, {"source": "10", "target": "38", "source_name": "african american", "target_name": "summary additional listening", "weight": 1.0, "year": 2011}, {"source": "10", "target": "40", "source_name": "african american", "target_name": "musical instruments", "weight": 1.0, "year": 2011}, {"source": "10", "target": "52", "source_name": "african american", "target_name": "folk song", "weight": 1.0, "year": 2011}, {"source": "10", "target": "53", "source_name": "african american", "target_name": "popular music", "weight": 5.0, "year": 2011}, {"source": "10", "target": "54", "source_name": "african american", "target_name": "american popular music", "weight": 1.0, "year": 2011}, {"source": "10", "target": "65", "source_name": "african american", "target_name": "country music", "weight": 1.0, "year": 2011}, {"source": "10", "target": "69", "source_name": "african american", "target_name": "classical music", "weight": 1.0, "year": 2011}, {"source": "10", "target": "74", "source_name": "african american", "target_name": "united states", "weight": 4.0, "year": 2011}, {"source": "10", "target": "75", "source_name": "african american", "target_name": "world war ii", "weight": 1.0, "year": 2011}, {"source": "10", "target": "77", "source_name": "african american", "target_name": "rock music", "weight": 1.0, "year": 2011}, {"source": "10", "target": "78", "source_name": "african american", "target_name": "hip hop", "weight": 1.0, "year": 2011}, {"source": "10", "target": "79", "source_name": "african american", "target_name": "popular culture", "weight": 2.0, "year": 2011}, {"source": "10", "target": "80", "source_name": "african american", "target_name": "folk music", "weight": 2.0, "year": 2011}, {"source": "10", "target": "89", "source_name": "african american", "target_name": "electronic music", "weight": 1.0, "year": 2011}, {"source": "11", "target": "23", "source_name": "south africa", "target_name": "electronic dance music", "weight": 1.0, "year": 2011}, {"source": "11", "target": "25", "source_name": "south africa", "target_name": "russian rock", "weight": 1.0, "year": 2011}, {"source": "11", "target": "36", "source_name": "south africa", "target_name": "music industry", "weight": 1.0, "year": 2011}, {"source": "11", "target": "46", "source_name": "south africa", "target_name": "music festival", "weight": 3.0, "year": 2011}, {"source": "11", "target": "53", "source_name": "south africa", "target_name": "popular music", "weight": 2.0, "year": 2011}, {"source": "11", "target": "66", "source_name": "south africa", "target_name": "hong kong", "weight": 1.0, "year": 2011}, {"source": "11", "target": "74", "source_name": "south africa", "target_name": "united states", "weight": 2.0, "year": 2011}, {"source": "11", "target": "78", "source_name": "south africa", "target_name": "hip hop", "weight": 1.0, "year": 2011}, {"source": "11", "target": "80", "source_name": "south africa", "target_name": "folk music", "weight": 1.0, "year": 2011}, {"source": "11", "target": "85", "source_name": "south africa", "target_name": "jewish music", "weight": 1.0, "year": 2011}, {"source": "11", "target": "88", "source_name": "south africa", "target_name": "oxford university press", "weight": 1.0, "year": 2011}, {"source": "12", "target": "15", "source_name": "rock opera", "target_name": "musical theatre", "weight": 3.0, "year": 2011}, {"source": "12", "target": "33", "source_name": "rock opera", "target_name": "jesus christ", "weight": 1.0, "year": 2011}, {"source": "12", "target": "41", "source_name": "rock opera", "target_name": "youth culture", "weight": 1.0, "year": 2011}, {"source": "12", "target": "53", "source_name": "rock opera", "target_name": "popular music", "weight": 1.0, "year": 2011}, {"source": "12", "target": "57", "source_name": "rock opera", "target_name": "north america", "weight": 1.0, "year": 2011}, {"source": "12", "target": "77", "source_name": "rock opera", "target_name": "rock music", "weight": 2.0, "year": 2011}, {"source": "12", "target": "79", "source_name": "rock opera", "target_name": "popular culture", "weight": 1.0, "year": 2011}, {"source": "15", "target": "33", "source_name": "musical theatre", "target_name": "jesus christ", "weight": 2.0, "year": 2011}, {"source": "15", "target": "53", "source_name": "musical theatre", "target_name": "popular music", "weight": 1.0, "year": 2011}, {"source": "15", "target": "70", "source_name": "musical theatre", "target_name": "world war", "weight": 1.0, "year": 2011}, {"source": "15", "target": "74", "source_name": "musical theatre", "target_name": "united states", "weight": 1.0, "year": 2011}, {"source": "15", "target": "77", "source_name": "musical theatre", "target_name": "rock music", "weight": 3.0, "year": 2011}, {"source": "15", "target": "87", "source_name": "musical theatre", "target_name": "music hall", "weight": 1.0, "year": 2011}, {"source": "16", "target": "29", "source_name": "bob dylan", "target_name": "rolling stone", "weight": 1.0, "year": 2011}, {"source": "16", "target": "30", "source_name": "bob dylan", "target_name": "rock band", "weight": 2.0, "year": 2011}, {"source": "16", "target": "36", "source_name": "bob dylan", "target_name": "music industry", "weight": 2.0, "year": 2011}, {"source": "16", "target": "42", "source_name": "bob dylan", "target_name": "simon frith", "weight": 1.0, "year": 2011}, {"source": "16", "target": "48", "source_name": "bob dylan", "target_name": "pop music", "weight": 2.0, "year": 2011}, {"source": "16", "target": "52", "source_name": "bob dylan", "target_name": "folk song", "weight": 1.0, "year": 2011}, {"source": "16", "target": "53", "source_name": "bob dylan", "target_name": "popular music", "weight": 9.0, "year": 2011}, {"source": "16", "target": "54", "source_name": "bob dylan", "target_name": "american popular music", "weight": 1.0, "year": 2011}, {"source": "16", "target": "69", "source_name": "bob dylan", "target_name": "classical music", "weight": 1.0, "year": 2011}, {"source": "16", "target": "70", "source_name": "bob dylan", "target_name": "world war", "weight": 1.0, "year": 2011}, {"source": "16", "target": "72", "source_name": "bob dylan", "target_name": "jimi hendrix", "weight": 2.0, "year": 2011}, {"source": "16", "target": "75", "source_name": "bob dylan", "target_name": "world war ii", "weight": 1.0, "year": 2011}, {"source": "16", "target": "77", "source_name": "bob dylan", "target_name": "rock music", "weight": 6.0, "year": 2011}, {"source": "16", "target": "80", "source_name": "bob dylan", "target_name": "folk music", "weight": 4.0, "year": 2011}, {"source": "17", "target": "30", "source_name": "civil rights", "target_name": "rock band", "weight": 1.0, "year": 2011}, {"source": "17", "target": "41", "source_name": "civil rights", "target_name": "youth culture", "weight": 1.0, "year": 2011}, {"source": "17", "target": "53", "source_name": "civil rights", "target_name": "popular music", "weight": 3.0, "year": 2011}, {"source": "17", "target": "54", "source_name": "civil rights", "target_name": "american popular music", "weight": 1.0, "year": 2011}, {"source": "17", "target": "70", "source_name": "civil rights", "target_name": "world war", "weight": 1.0, "year": 2011}, {"source": "17", "target": "73", "source_name": "civil rights", "target_name": "southern rock", "weight": 1.0, "year": 2011}, {"source": "17", "target": "74", "source_name": "civil rights", "target_name": "united states", "weight": 2.0, "year": 2011}, {"source": "17", "target": "75", "source_name": "civil rights", "target_name": "world war ii", "weight": 1.0, "year": 2011}, {"source": "17", "target": "77", "source_name": "civil rights", "target_name": "rock music", "weight": 3.0, "year": 2011}, {"source": "17", "target": "79", "source_name": "civil rights", "target_name": "popular culture", "weight": 1.0, "year": 2011}, {"source": "17", "target": "80", "source_name": "civil rights", "target_name": "folk music", "weight": 1.0, "year": 2011}, {"source": "18", "target": "19", "source_name": "middle class", "target_name": "music video", "weight": 1.0, "year": 2011}, {"source": "18", "target": "28", "source_name": "middle class", "target_name": "high school", "weight": 1.0, "year": 2011}, {"source": "18", "target": "30", "source_name": "middle class", "target_name": "rock band", "weight": 2.0, "year": 2011}, {"source": "18", "target": "53", "source_name": "middle class", "target_name": "popular music", "weight": 1.0, "year": 2011}, {"source": "18", "target": "61", "source_name": "middle class", "target_name": "progressive rock", "weight": 2.0, "year": 2011}, {"source": "18", "target": "77", "source_name": "middle class", "target_name": "rock music", "weight": 2.0, "year": 2011}, {"source": "19", "target": "22", "source_name": "music video", "target_name": "chamber music", "weight": 1.0, "year": 2011}, {"source": "19", "target": "28", "source_name": "music video", "target_name": "high school", "weight": 1.0, "year": 2011}, {"source": "19", "target": "30", "source_name": "music video", "target_name": "rock band", "weight": 3.0, "year": 2011}, {"source": "19", "target": "36", "source_name": "music video", "target_name": "music industry", "weight": 2.0, "year": 2011}, {"source": "19", "target": "38", "source_name": "music video", "target_name": "summary additional listening", "weight": 1.0, "year": 2011}, {"source": "19", "target": "40", "source_name": "music video", "target_name": "musical instruments", "weight": 1.0, "year": 2011}, {"source": "19", "target": "47", "source_name": "music video", "target_name": "hard rock", "weight": 1.0, "year": 2011}, {"source": "19", "target": "48", "source_name": "music video", "target_name": "pop music", "weight": 3.0, "year": 2011}, {"source": "19", "target": "49", "source_name": "music video", "target_name": "music theory", "weight": 1.0, "year": 2011}, {"source": "19", "target": "51", "source_name": "music video", "target_name": "cultural identity", "weight": 2.0, "year": 2011}, {"source": "19", "target": "52", "source_name": "music video", "target_name": "folk song", "weight": 1.0, "year": 2011}, {"source": "19", "target": "53", "source_name": "music video", "target_name": "popular music", "weight": 7.0, "year": 2011}, {"source": "19", "target": "54", "source_name": "music video", "target_name": "american popular music", "weight": 1.0, "year": 2011}, {"source": "19", "target": "61", "source_name": "music video", "target_name": "progressive rock", "weight": 1.0, "year": 2011}, {"source": "19", "target": "65", "source_name": "music video", "target_name": "country music", "weight": 4.0, "year": 2011}, {"source": "19", "target": "69", "source_name": "music video", "target_name": "classical music", "weight": 1.0, "year": 2011}, {"source": "19", "target": "72", "source_name": "music video", "target_name": "jimi hendrix", "weight": 1.0, "year": 2011}, {"source": "19", "target": "74", "source_name": "music video", "target_name": "united states", "weight": 2.0, "year": 2011}, {"source": "19", "target": "76", "source_name": "music video", "target_name": "los angeles", "weight": 1.0, "year": 2011}, {"source": "19", "target": "77", "source_name": "music video", "target_name": "rock music", "weight": 9.0, "year": 2011}, {"source": "19", "target": "78", "source_name": "music video", "target_name": "hip hop", "weight": 1.0, "year": 2011}, {"source": "19", "target": "80", "source_name": "music video", "target_name": "folk music", "weight": 1.0, "year": 2011}, {"source": "19", "target": "82", "source_name": "music video", "target_name": "heavy metal", "weight": 1.0, "year": 2011}, {"source": "19", "target": "89", "source_name": "music video", "target_name": "electronic music", "weight": 1.0, "year": 2011}, {"source": "20", "target": "24", "source_name": "garage rock", "target_name": "punk rock", "weight": 1.0, "year": 2011}, {"source": "20", "target": "27", "source_name": "garage rock", "target_name": "pop rock", "weight": 1.0, "year": 2011}, {"source": "20", "target": "29", "source_name": "garage rock", "target_name": "rolling stone", "weight": 1.0, "year": 2011}, {"source": "20", "target": "30", "source_name": "garage rock", "target_name": "rock band", "weight": 2.0, "year": 2011}, {"source": "20", "target": "43", "source_name": "garage rock", "target_name": "music education", "weight": 1.0, "year": 2011}, {"source": "20", "target": "44", "source_name": "garage rock", "target_name": "alternative rock", "weight": 2.0, "year": 2011}, {"source": "20", "target": "47", "source_name": "garage rock", "target_name": "hard rock", "weight": 1.0, "year": 2011}, {"source": "20", "target": "48", "source_name": "garage rock", "target_name": "pop music", "weight": 1.0, "year": 2011}, {"source": "20", "target": "53", "source_name": "garage rock", "target_name": "popular music", "weight": 3.0, "year": 2011}, {"source": "20", "target": "57", "source_name": "garage rock", "target_name": "north america", "weight": 1.0, "year": 2011}, {"source": "20", "target": "65", "source_name": "garage rock", "target_name": "country music", "weight": 1.0, "year": 2011}, {"source": "20", "target": "73", "source_name": "garage rock", "target_name": "southern rock", "weight": 1.0, "year": 2011}, {"source": "20", "target": "77", "source_name": "garage rock", "target_name": "rock music", "weight": 4.0, "year": 2011}, {"source": "20", "target": "80", "source_name": "garage rock", "target_name": "folk music", "weight": 1.0, "year": 2011}, {"source": "21", "target": "47", "source_name": "social protest", "target_name": "hard rock", "weight": 1.0, "year": 2011}, {"source": "21", "target": "48", "source_name": "social protest", "target_name": "pop music", "weight": 1.0, "year": 2011}, {"source": "21", "target": "53", "source_name": "social protest", "target_name": "popular music", "weight": 2.0, "year": 2011}, {"source": "21", "target": "57", "source_name": "social protest", "target_name": "north america", "weight": 2.0, "year": 2011}, {"source": "21", "target": "71", "source_name": "social protest", "target_name": "latin american", "weight": 1.0, "year": 2011}, {"source": "21", "target": "74", "source_name": "social protest", "target_name": "united states", "weight": 1.0, "year": 2011}, {"source": "21", "target": "77", "source_name": "social protest", "target_name": "rock music", "weight": 1.0, "year": 2011}, {"source": "21", "target": "82", "source_name": "social protest", "target_name": "heavy metal", "weight": 1.0, "year": 2011}, {"source": "22", "target": "35", "source_name": "chamber music", "target_name": "ancient greek", "weight": 1.0, "year": 2011}, {"source": "22", "target": "36", "source_name": "chamber music", "target_name": "music industry", "weight": 1.0, "year": 2011}, {"source": "22", "target": "38", "source_name": "chamber music", "target_name": "summary additional listening", "weight": 1.0, "year": 2011}, {"source": "22", "target": "40", "source_name": "chamber music", "target_name": "musical instruments", "weight": 1.0, "year": 2011}, {"source": "22", "target": "52", "source_name": "chamber music", "target_name": "folk song", "weight": 1.0, "year": 2011}, {"source": "22", "target": "53", "source_name": "chamber music", "target_name": "popular music", "weight": 1.0, "year": 2011}, {"source": "22", "target": "54", "source_name": "chamber music", "target_name": "american popular music", "weight": 1.0, "year": 2011}, {"source": "22", "target": "65", "source_name": "chamber music", "target_name": "country music", "weight": 2.0, "year": 2011}, {"source": "22", "target": "69", "source_name": "chamber music", "target_name": "classical music", "weight": 2.0, "year": 2011}, {"source": "22", "target": "74", "source_name": "chamber music", "target_name": "united states", "weight": 1.0, "year": 2011}, {"source": "22", "target": "77", "source_name": "chamber music", "target_name": "rock music", "weight": 1.0, "year": 2011}, {"source": "22", "target": "80", "source_name": "chamber music", "target_name": "folk music", "weight": 2.0, "year": 2011}, {"source": "22", "target": "89", "source_name": "chamber music", "target_name": "electronic music", "weight": 3.0, "year": 2011}, {"source": "23", "target": "36", "source_name": "electronic dance music", "target_name": "music industry", "weight": 2.0, "year": 2011}, {"source": "23", "target": "42", "source_name": "electronic dance music", "target_name": "simon frith", "weight": 2.0, "year": 2011}, {"source": "23", "target": "47", "source_name": "electronic dance music", "target_name": "hard rock", "weight": 1.0, "year": 2011}, {"source": "23", "target": "53", "source_name": "electronic dance music", "target_name": "popular music", "weight": 5.0, "year": 2011}, {"source": "23", "target": "56", "source_name": "electronic dance music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2011}, {"source": "23", "target": "60", "source_name": "electronic dance music", "target_name": "cultural studies", "weight": 2.0, "year": 2011}, {"source": "23", "target": "67", "source_name": "electronic dance music", "target_name": "rock art", "weight": 1.0, "year": 2011}, {"source": "23", "target": "74", "source_name": "electronic dance music", "target_name": "united states", "weight": 2.0, "year": 2011}, {"source": "23", "target": "76", "source_name": "electronic dance music", "target_name": "los angeles", "weight": 1.0, "year": 2011}, {"source": "23", "target": "78", "source_name": "electronic dance music", "target_name": "hip hop", "weight": 1.0, "year": 2011}, {"source": "23", "target": "79", "source_name": "electronic dance music", "target_name": "popular culture", "weight": 1.0, "year": 2011}, {"source": "23", "target": "82", "source_name": "electronic dance music", "target_name": "heavy metal", "weight": 1.0, "year": 2011}, {"source": "23", "target": "88", "source_name": "electronic dance music", "target_name": "oxford university press", "weight": 1.0, "year": 2011}, {"source": "23", "target": "89", "source_name": "electronic dance music", "target_name": "electronic music", "weight": 2.0, "year": 2011}, {"source": "24", "target": "27", "source_name": "punk rock", "target_name": "pop rock", "weight": 1.0, "year": 2011}, {"source": "24", "target": "36", "source_name": "punk rock", "target_name": "music industry", "weight": 1.0, "year": 2011}, {"source": "24", "target": "42", "source_name": "punk rock", "target_name": "simon frith", "weight": 1.0, "year": 2011}, {"source": "24", "target": "44", "source_name": "punk rock", "target_name": "alternative rock", "weight": 2.0, "year": 2011}, {"source": "24", "target": "47", "source_name": "punk rock", "target_name": "hard rock", "weight": 3.0, "year": 2011}, {"source": "24", "target": "48", "source_name": "punk rock", "target_name": "pop music", "weight": 4.0, "year": 2011}, {"source": "24", "target": "53", "source_name": "punk rock", "target_name": "popular music", "weight": 6.0, "year": 2011}, {"source": "24", "target": "65", "source_name": "punk rock", "target_name": "country music", "weight": 1.0, "year": 2011}, {"source": "24", "target": "69", "source_name": "punk rock", "target_name": "classical music", "weight": 1.0, "year": 2011}, {"source": "24", "target": "74", "source_name": "punk rock", "target_name": "united states", "weight": 2.0, "year": 2011}, {"source": "24", "target": "77", "source_name": "punk rock", "target_name": "rock music", "weight": 8.0, "year": 2011}, {"source": "24", "target": "78", "source_name": "punk rock", "target_name": "hip hop", "weight": 1.0, "year": 2011}, {"source": "24", "target": "79", "source_name": "punk rock", "target_name": "popular culture", "weight": 1.0, "year": 2011}, {"source": "24", "target": "80", "source_name": "punk rock", "target_name": "folk music", "weight": 1.0, "year": 2011}, {"source": "24", "target": "82", "source_name": "punk rock", "target_name": "heavy metal", "weight": 3.0, "year": 2011}, {"source": "25", "target": "46", "source_name": "russian rock", "target_name": "music festival", "weight": 1.0, "year": 2011}, {"source": "25", "target": "53", "source_name": "russian rock", "target_name": "popular music", "weight": 2.0, "year": 2011}, {"source": "25", "target": "66", "source_name": "russian rock", "target_name": "hong kong", "weight": 1.0, "year": 2011}, {"source": "25", "target": "77", "source_name": "russian rock", "target_name": "rock music", "weight": 1.0, "year": 2011}, {"source": "25", "target": "78", "source_name": "russian rock", "target_name": "hip hop", "weight": 1.0, "year": 2011}, {"source": "25", "target": "80", "source_name": "russian rock", "target_name": "folk music", "weight": 1.0, "year": 2011}, {"source": "25", "target": "85", "source_name": "russian rock", "target_name": "jewish music", "weight": 1.0, "year": 2011}, {"source": "27", "target": "44", "source_name": "pop rock", "target_name": "alternative rock", "weight": 1.0, "year": 2011}, {"source": "27", "target": "47", "source_name": "pop rock", "target_name": "hard rock", "weight": 1.0, "year": 2011}, {"source": "27", "target": "48", "source_name": "pop rock", "target_name": "pop music", "weight": 1.0, "year": 2011}, {"source": "27", "target": "53", "source_name": "pop rock", "target_name": "popular music", "weight": 1.0, "year": 2011}, {"source": "27", "target": "64", "source_name": "pop rock", "target_name": "english language", "weight": 1.0, "year": 2011}, {"source": "27", "target": "66", "source_name": "pop rock", "target_name": "hong kong", "weight": 1.0, "year": 2011}, {"source": "27", "target": "67", "source_name": "pop rock", "target_name": "rock art", "weight": 1.0, "year": 2011}, {"source": "27", "target": "77", "source_name": "pop rock", "target_name": "rock music", "weight": 1.0, "year": 2011}, {"source": "27", "target": "83", "source_name": "pop rock", "target_name": "folk rock", "weight": 1.0, "year": 2011}, {"source": "28", "target": "30", "source_name": "high school", "target_name": "rock band", "weight": 1.0, "year": 2011}, {"source": "28", "target": "37", "source_name": "high school", "target_name": "middle ages", "weight": 1.0, "year": 2011}, {"source": "28", "target": "48", "source_name": "high school", "target_name": "pop music", "weight": 1.0, "year": 2011}, {"source": "28", "target": "61", "source_name": "high school", "target_name": "progressive rock", "weight": 1.0, "year": 2011}, {"source": "28", "target": "77", "source_name": "high school", "target_name": "rock music", "weight": 3.0, "year": 2011}, {"source": "28", "target": "82", "source_name": "high school", "target_name": "heavy metal", "weight": 1.0, "year": 2011}, {"source": "29", "target": "36", "source_name": "rolling stone", "target_name": "music industry", "weight": 1.0, "year": 2011}, {"source": "29", "target": "42", "source_name": "rolling stone", "target_name": "simon frith", "weight": 1.0, "year": 2011}, {"source": "29", "target": "48", "source_name": "rolling stone", "target_name": "pop music", "weight": 3.0, "year": 2011}, {"source": "29", "target": "53", "source_name": "rolling stone", "target_name": "popular music", "weight": 6.0, "year": 2011}, {"source": "29", "target": "55", "source_name": "rolling stone", "target_name": "rock criticism", "weight": 4.0, "year": 2011}, {"source": "29", "target": "56", "source_name": "rolling stone", "target_name": "bruce springsteen", "weight": 1.0, "year": 2011}, {"source": "29", "target": "62", "source_name": "rolling stone", "target_name": "led zeppelin", "weight": 1.0, "year": 2011}, {"source": "29", "target": "72", "source_name": "rolling stone", "target_name": "jimi hendrix", "weight": 2.0, "year": 2011}, {"source": "29", "target": "74", "source_name": "rolling stone", "target_name": "united states", "weight": 1.0, "year": 2011}, {"source": "29", "target": "77", "source_name": "rolling stone", "target_name": "rock music", "weight": 8.0, "year": 2011}, {"source": "29", "target": "87", "source_name": "rolling stone", "target_name": "music hall", "weight": 1.0, "year": 2011}, {"source": "30", "target": "36", "source_name": "rock band", "target_name": "music industry", "weight": 1.0, "year": 2011}, {"source": "30", "target": "37", "source_name": "rock band", "target_name": "middle ages", "weight": 1.0, "year": 2011}, {"source": "30", "target": "43", "source_name": "rock band", "target_name": "music education", "weight": 2.0, "year": 2011}, {"source": "30", "target": "44", "source_name": "rock band", "target_name": "alternative rock", "weight": 1.0, "year": 2011}, {"source": "30", "target": "48", "source_name": "rock band", "target_name": "pop music", "weight": 1.0, "year": 2011}, {"source": "30", "target": "52", "source_name": "rock band", "target_name": "folk song", "weight": 1.0, "year": 2011}, {"source": "30", "target": "53", "source_name": "rock band", "target_name": "popular music", "weight": 16.0, "year": 2011}, {"source": "30", "target": "61", "source_name": "rock band", "target_name": "progressive rock", "weight": 8.0, "year": 2011}, {"source": "30", "target": "65", "source_name": "rock band", "target_name": "country music", "weight": 1.0, "year": 2011}, {"source": "30", "target": "69", "source_name": "rock band", "target_name": "classical music", "weight": 2.0, "year": 2011}, {"source": "30", "target": "72", "source_name": "rock band", "target_name": "jimi hendrix", "weight": 1.0, "year": 2011}, {"source": "30", "target": "73", "source_name": "rock band", "target_name": "southern rock", "weight": 2.0, "year": 2011}, {"source": "30", "target": "74", "source_name": "rock band", "target_name": "united states", "weight": 1.0, "year": 2011}, {"source": "30", "target": "76", "source_name": "rock band", "target_name": "los angeles", "weight": 1.0, "year": 2011}, {"source": "30", "target": "77", "source_name": "rock band", "target_name": "rock music", "weight": 22.0, "year": 2011}, {"source": "30", "target": "79", "source_name": "rock band", "target_name": "popular culture", "weight": 1.0, "year": 2011}, {"source": "30", "target": "80", "source_name": "rock band", "target_name": "folk music", "weight": 2.0, "year": 2011}, {"source": "30", "target": "82", "source_name": "rock band", "target_name": "heavy metal", "weight": 1.0, "year": 2011}, {"source": "32", "target": "43", "source_name": "higher education", "target_name": "music education", "weight": 1.0, "year": 2011}, {"source": "33", "target": "53", "source_name": "jesus christ", "target_name": "popular music", "weight": 1.0, "year": 2011}, {"source": "33", "target": "70", "source_name": "jesus christ", "target_name": "world war", "weight": 1.0, "year": 2011}, {"source": "33", "target": "77", "source_name": "jesus christ", "target_name": "rock music", "weight": 3.0, "year": 2011}, {"source": "34", "target": "36", "source_name": "mass media", "target_name": "music industry", "weight": 1.0, "year": 2011}, {"source": "34", "target": "40", "source_name": "mass media", "target_name": "musical instruments", "weight": 1.0, "year": 2011}, {"source": "34", "target": "41", "source_name": "mass media", "target_name": "youth culture", "weight": 1.0, "year": 2011}, {"source": "34", "target": "43", "source_name": "mass media", "target_name": "music education", "weight": 1.0, "year": 2011}, {"source": "34", "target": "46", "source_name": "mass media", "target_name": "music festival", "weight": 1.0, "year": 2011}, {"source": "34", "target": "48", "source_name": "mass media", "target_name": "pop music", "weight": 2.0, "year": 2011}, {"source": "34", "target": "51", "source_name": "mass media", "target_name": "cultural identity", "weight": 1.0, "year": 2011}, {"source": "34", "target": "52", "source_name": "mass media", "target_name": "folk song", "weight": 2.0, "year": 2011}, {"source": "34", "target": "53", "source_name": "mass media", "target_name": "popular music", "weight": 6.0, "year": 2011}, {"source": "34", "target": "65", "source_name": "mass media", "target_name": "country music", "weight": 1.0, "year": 2011}, {"source": "34", "target": "66", "source_name": "mass media", "target_name": "hong kong", "weight": 1.0, "year": 2011}, {"source": "34", "target": "67", "source_name": "mass media", "target_name": "rock art", "weight": 1.0, "year": 2011}, {"source": "34", "target": "69", "source_name": "mass media", "target_name": "classical music", "weight": 1.0, "year": 2011}, {"source": "34", "target": "77", "source_name": "mass media", "target_name": "rock music", "weight": 4.0, "year": 2011}, {"source": "34", "target": "79", "source_name": "mass media", "target_name": "popular culture", "weight": 1.0, "year": 2011}, {"source": "35", "target": "43", "source_name": "ancient greek", "target_name": "music education", "weight": 1.0, "year": 2011}, {"source": "35", "target": "65", "source_name": "ancient greek", "target_name": "country music", "weight": 1.0, "year": 2011}, {"source": "35", "target": "77", "source_name": "ancient greek", "target_name": "rock music", "weight": 1.0, "year": 2011}, {"source": "35", "target": "80", "source_name": "ancient greek", "target_name": "folk music", "weight": 1.0, "year": 2011}, {"source": "35", "target": "89", "source_name": "ancient greek", "target_name": "electronic music", "weight": 1.0, "year": 2011}, {"source": "36", "target": "38", "source_name": "music industry", "target_name": "summary additional listening", "weight": 1.0, "year": 2011}, {"source": "36", "target": "40", "source_name": "music industry", "target_name": "musical instruments", "weight": 1.0, "year": 2011}, {"source": "36", "target": "41", "source_name": "music industry", "target_name": "youth culture", "weight": 2.0, "year": 2011}, {"source": "36", "target": "42", "source_name": "music industry", "target_name": "simon frith", "weight": 2.0, "year": 2011}, {"source": "36", "target": "43", "source_name": "music industry", "target_name": "music education", "weight": 2.0, "year": 2011}, {"source": "36", "target": "46", "source_name": "music industry", "target_name": "music festival", "weight": 1.0, "year": 2011}, {"source": "36", "target": "47", "source_name": "music industry", "target_name": "hard rock", "weight": 3.0, "year": 2011}, {"source": "36", "target": "48", "source_name": "music industry", "target_name": "pop music", "weight": 8.0, "year": 2011}, {"source": "36", "target": "49", "source_name": "music industry", "target_name": "music theory", "weight": 1.0, "year": 2011}, {"source": "36", "target": "50", "source_name": "music industry", "target_name": "hollywood film", "weight": 1.0, "year": 2011}, {"source": "36", "target": "51", "source_name": "music industry", "target_name": "cultural identity", "weight": 1.0, "year": 2011}, {"source": "36", "target": "52", "source_name": "music industry", "target_name": "folk song", "weight": 1.0, "year": 2011}, {"source": "36", "target": "53", "source_name": "music industry", "target_name": "popular music", "weight": 27.0, "year": 2011}, {"source": "36", "target": "54", "source_name": "music industry", "target_name": "american popular music", "weight": 3.0, "year": 2011}, {"source": "36", "target": "55", "source_name": "music industry", "target_name": "rock criticism", "weight": 3.0, "year": 2011}, {"source": "36", "target": "56", "source_name": "music industry", "target_name": "bruce springsteen", "weight": 2.0, "year": 2011}, {"source": "36", "target": "60", "source_name": "music industry", "target_name": "cultural studies", "weight": 1.0, "year": 2011}, {"source": "36", "target": "61", "source_name": "music industry", "target_name": "progressive rock", "weight": 1.0, "year": 2011}, {"source": "36", "target": "62", "source_name": "music industry", "target_name": "led zeppelin", "weight": 1.0, "year": 2011}, {"source": "36", "target": "65", "source_name": "music industry", "target_name": "country music", "weight": 2.0, "year": 2011}, {"source": "36", "target": "66", "source_name": "music industry", "target_name": "hong kong", "weight": 1.0, "year": 2011}, {"source": "36", "target": "67", "source_name": "music industry", "target_name": "rock art", "weight": 1.0, "year": 2011}, {"source": "36", "target": "68", "source_name": "music industry", "target_name": "hearing loss", "weight": 1.0, "year": 2011}, {"source": "36", "target": "69", "source_name": "music industry", "target_name": "classical music", "weight": 5.0, "year": 2011}, {"source": "36", "target": "70", "source_name": "music industry", "target_name": "world war", "weight": 2.0, "year": 2011}, {"source": "36", "target": "72", "source_name": "music industry", "target_name": "jimi hendrix", "weight": 3.0, "year": 2011}, {"source": "36", "target": "74", "source_name": "music industry", "target_name": "united states", "weight": 4.0, "year": 2011}, {"source": "36", "target": "75", "source_name": "music industry", "target_name": "world war ii", "weight": 3.0, "year": 2011}, {"source": "36", "target": "76", "source_name": "music industry", "target_name": "los angeles", "weight": 2.0, "year": 2011}, {"source": "36", "target": "77", "source_name": "music industry", "target_name": "rock music", "weight": 14.0, "year": 2011}, {"source": "36", "target": "78", "source_name": "music industry", "target_name": "hip hop", "weight": 5.0, "year": 2011}, {"source": "36", "target": "79", "source_name": "music industry", "target_name": "popular culture", "weight": 4.0, "year": 2011}, {"source": "36", "target": "80", "source_name": "music industry", "target_name": "folk music", "weight": 3.0, "year": 2011}, {"source": "36", "target": "82", "source_name": "music industry", "target_name": "heavy metal", "weight": 2.0, "year": 2011}, {"source": "36", "target": "83", "source_name": "music industry", "target_name": "folk rock", "weight": 1.0, "year": 2011}, {"source": "36", "target": "88", "source_name": "music industry", "target_name": "oxford university press", "weight": 2.0, "year": 2011}, {"source": "36", "target": "89", "source_name": "music industry", "target_name": "electronic music", "weight": 2.0, "year": 2011}, {"source": "37", "target": "44", "source_name": "middle ages", "target_name": "alternative rock", "weight": 1.0, "year": 2011}, {"source": "37", "target": "58", "source_name": "middle ages", "target_name": "music therapy", "weight": 1.0, "year": 2011}, {"source": "37", "target": "61", "source_name": "middle ages", "target_name": "progressive rock", "weight": 1.0, "year": 2011}, {"source": "37", "target": "69", "source_name": "middle ages", "target_name": "classical music", "weight": 1.0, "year": 2011}, {"source": "37", "target": "77", "source_name": "middle ages", "target_name": "rock music", "weight": 2.0, "year": 2011}, {"source": "37", "target": "80", "source_name": "middle ages", "target_name": "folk music", "weight": 2.0, "year": 2011}, {"source": "38", "target": "40", "source_name": "summary additional listening", "target_name": "musical instruments", "weight": 1.0, "year": 2011}, {"source": "38", "target": "52", "source_name": "summary additional listening", "target_name": "folk song", "weight": 1.0, "year": 2011}, {"source": "38", "target": "53", "source_name": "summary additional listening", "target_name": "popular music", "weight": 1.0, "year": 2011}, {"source": "38", "target": "54", "source_name": "summary additional listening", "target_name": "american popular music", "weight": 1.0, "year": 2011}, {"source": "38", "target": "65", "source_name": "summary additional listening", "target_name": "country music", "weight": 1.0, "year": 2011}, {"source": "38", "target": "69", "source_name": "summary additional listening", "target_name": "classical music", "weight": 1.0, "year": 2011}, {"source": "38", "target": "74", "source_name": "summary additional listening", "target_name": "united states", "weight": 1.0, "year": 2011}, {"source": "38", "target": "80", "source_name": "summary additional listening", "target_name": "folk music", "weight": 1.0, "year": 2011}, {"source": "38", "target": "89", "source_name": "summary additional listening", "target_name": "electronic music", "weight": 1.0, "year": 2011}, {"source": "40", "target": "43", "source_name": "musical instruments", "target_name": "music education", "weight": 1.0, "year": 2011}, {"source": "40", "target": "49", "source_name": "musical instruments", "target_name": "music theory", "weight": 1.0, "year": 2011}, {"source": "40", "target": "52", "source_name": "musical instruments", "target_name": "folk song", "weight": 1.0, "year": 2011}, {"source": "40", "target": "53", "source_name": "musical instruments", "target_name": "popular music", "weight": 2.0, "year": 2011}, {"source": "40", "target": "54", "source_name": "musical instruments", "target_name": "american popular music", "weight": 2.0, "year": 2011}, {"source": "40", "target": "65", "source_name": "musical instruments", "target_name": "country music", "weight": 1.0, "year": 2011}, {"source": "40", "target": "69", "source_name": "musical instruments", "target_name": "classical music", "weight": 1.0, "year": 2011}, {"source": "40", "target": "70", "source_name": "musical instruments", "target_name": "world war", "weight": 1.0, "year": 2011}, {"source": "40", "target": "74", "source_name": "musical instruments", "target_name": "united states", "weight": 2.0, "year": 2011}, {"source": "40", "target": "75", "source_name": "musical instruments", "target_name": "world war ii", "weight": 1.0, "year": 2011}, {"source": "40", "target": "80", "source_name": "musical instruments", "target_name": "folk music", "weight": 1.0, "year": 2011}, {"source": "40", "target": "89", "source_name": "musical instruments", "target_name": "electronic music", "weight": 2.0, "year": 2011}, {"source": "41", "target": "48", "source_name": "youth culture", "target_name": "pop music", "weight": 4.0, "year": 2011}, {"source": "41", "target": "51", "source_name": "youth culture", "target_name": "cultural identity", "weight": 2.0, "year": 2011}, {"source": "41", "target": "53", "source_name": "youth culture", "target_name": "popular music", "weight": 3.0, "year": 2011}, {"source": "41", "target": "60", "source_name": "youth culture", "target_name": "cultural studies", "weight": 2.0, "year": 2011}, {"source": "41", "target": "66", "source_name": "youth culture", "target_name": "hong kong", "weight": 1.0, "year": 2011}, {"source": "41", "target": "74", "source_name": "youth culture", "target_name": "united states", "weight": 1.0, "year": 2011}, {"source": "41", "target": "75", "source_name": "youth culture", "target_name": "world war ii", "weight": 1.0, "year": 2011}, {"source": "41", "target": "77", "source_name": "youth culture", "target_name": "rock music", "weight": 6.0, "year": 2011}, {"source": "41", "target": "80", "source_name": "youth culture", "target_name": "folk music", "weight": 1.0, "year": 2011}, {"source": "42", "target": "47", "source_name": "simon frith", "target_name": "hard rock", "weight": 1.0, "year": 2011}, {"source": "42", "target": "48", "source_name": "simon frith", "target_name": "pop music", "weight": 6.0, "year": 2011}, {"source": "42", "target": "49", "source_name": "simon frith", "target_name": "music theory", "weight": 1.0, "year": 2011}, {"source": "42", "target": "51", "source_name": "simon frith", "target_name": "cultural identity", "weight": 1.0, "year": 2011}, {"source": "42", "target": "53", "source_name": "simon frith", "target_name": "popular music", "weight": 4.0, "year": 2011}, {"source": "42", "target": "55", "source_name": "simon frith", "target_name": "rock criticism", "weight": 2.0, "year": 2011}, {"source": "42", "target": "56", "source_name": "simon frith", "target_name": "bruce springsteen", "weight": 1.0, "year": 2011}, {"source": "42", "target": "57", "source_name": "simon frith", "target_name": "north america", "weight": 1.0, "year": 2011}, {"source": "42", "target": "60", "source_name": "simon frith", "target_name": "cultural studies", "weight": 1.0, "year": 2011}, {"source": "42", "target": "61", "source_name": "simon frith", "target_name": "progressive rock", "weight": 1.0, "year": 2011}, {"source": "42", "target": "65", "source_name": "simon frith", "target_name": "country music", "weight": 1.0, "year": 2011}, {"source": "42", "target": "72", "source_name": "simon frith", "target_name": "jimi hendrix", "weight": 1.0, "year": 2011}, {"source": "42", "target": "76", "source_name": "simon frith", "target_name": "los angeles", "weight": 1.0, "year": 2011}, {"source": "42", "target": "77", "source_name": "simon frith", "target_name": "rock music", "weight": 3.0, "year": 2011}, {"source": "42", "target": "78", "source_name": "simon frith", "target_name": "hip hop", "weight": 1.0, "year": 2011}, {"source": "42", "target": "79", "source_name": "simon frith", "target_name": "popular culture", "weight": 1.0, "year": 2011}, {"source": "42", "target": "82", "source_name": "simon frith", "target_name": "heavy metal", "weight": 1.0, "year": 2011}, {"source": "42", "target": "88", "source_name": "simon frith", "target_name": "oxford university press", "weight": 1.0, "year": 2011}, {"source": "43", "target": "48", "source_name": "music education", "target_name": "pop music", "weight": 2.0, "year": 2011}, {"source": "43", "target": "49", "source_name": "music education", "target_name": "music theory", "weight": 3.0, "year": 2011}, {"source": "43", "target": "52", "source_name": "music education", "target_name": "folk song", "weight": 1.0, "year": 2011}, {"source": "43", "target": "53", "source_name": "music education", "target_name": "popular music", "weight": 6.0, "year": 2011}, {"source": "43", "target": "57", "source_name": "music education", "target_name": "north america", "weight": 1.0, "year": 2011}, {"source": "43", "target": "60", "source_name": "music education", "target_name": "cultural studies", "weight": 1.0, "year": 2011}, {"source": "43", "target": "66", "source_name": "music education", "target_name": "hong kong", "weight": 1.0, "year": 2011}, {"source": "43", "target": "69", "source_name": "music education", "target_name": "classical music", "weight": 3.0, "year": 2011}, {"source": "43", "target": "74", "source_name": "music education", "target_name": "united states", "weight": 1.0, "year": 2011}, {"source": "43", "target": "77", "source_name": "music education", "target_name": "rock music", "weight": 3.0, "year": 2011}, {"source": "43", "target": "80", "source_name": "music education", "target_name": "folk music", "weight": 5.0, "year": 2011}, {"source": "44", "target": "47", "source_name": "alternative rock", "target_name": "hard rock", "weight": 1.0, "year": 2011}, {"source": "44", "target": "48", "source_name": "alternative rock", "target_name": "pop music", "weight": 1.0, "year": 2011}, {"source": "44", "target": "53", "source_name": "alternative rock", "target_name": "popular music", "weight": 7.0, "year": 2011}, {"source": "44", "target": "57", "source_name": "alternative rock", "target_name": "north america", "weight": 3.0, "year": 2011}, {"source": "44", "target": "61", "source_name": "alternative rock", "target_name": "progressive rock", "weight": 1.0, "year": 2011}, {"source": "44", "target": "65", "source_name": "alternative rock", "target_name": "country music", "weight": 2.0, "year": 2011}, {"source": "44", "target": "67", "source_name": "alternative rock", "target_name": "rock art", "weight": 1.0, "year": 2011}, {"source": "44", "target": "73", "source_name": "alternative rock", "target_name": "southern rock", "weight": 1.0, "year": 2011}, {"source": "44", "target": "74", "source_name": "alternative rock", "target_name": "united states", "weight": 2.0, "year": 2011}, {"source": "44", "target": "77", "source_name": "alternative rock", "target_name": "rock music", "weight": 6.0, "year": 2011}, {"source": "44", "target": "78", "source_name": "alternative rock", "target_name": "hip hop", "weight": 1.0, "year": 2011}, {"source": "44", "target": "80", "source_name": "alternative rock", "target_name": "folk music", "weight": 1.0, "year": 2011}, {"source": "46", "target": "48", "source_name": "music festival", "target_name": "pop music", "weight": 2.0, "year": 2011}, {"source": "46", "target": "53", "source_name": "music festival", "target_name": "popular music", "weight": 1.0, "year": 2011}, {"source": "46", "target": "66", "source_name": "music festival", "target_name": "hong kong", "weight": 1.0, "year": 2011}, {"source": "46", "target": "69", "source_name": "music festival", "target_name": "classical music", "weight": 2.0, "year": 2011}, {"source": "46", "target": "77", "source_name": "music festival", "target_name": "rock music", "weight": 1.0, "year": 2011}, {"source": "46", "target": "78", "source_name": "music festival", "target_name": "hip hop", "weight": 1.0, "year": 2011}, {"source": "46", "target": "80", "source_name": "music festival", "target_name": "folk music", "weight": 2.0, "year": 2011}, {"source": "46", "target": "85", "source_name": "music festival", "target_name": "jewish music", "weight": 1.0, "year": 2011}, {"source": "47", "target": "48", "source_name": "hard rock", "target_name": "pop music", "weight": 2.0, "year": 2011}, {"source": "47", "target": "53", "source_name": "hard rock", "target_name": "popular music", "weight": 4.0, "year": 2011}, {"source": "47", "target": "56", "source_name": "hard rock", "target_name": "bruce springsteen", "weight": 1.0, "year": 2011}, {"source": "47", "target": "57", "source_name": "hard rock", "target_name": "north america", "weight": 1.0, "year": 2011}, {"source": "47", "target": "65", "source_name": "hard rock", "target_name": "country music", "weight": 1.0, "year": 2011}, {"source": "47", "target": "69", "source_name": "hard rock", "target_name": "classical music", "weight": 2.0, "year": 2011}, {"source": "47", "target": "77", "source_name": "hard rock", "target_name": "rock music", "weight": 9.0, "year": 2011}, {"source": "47", "target": "78", "source_name": "hard rock", "target_name": "hip hop", "weight": 1.0, "year": 2011}, {"source": "47", "target": "79", "source_name": "hard rock", "target_name": "popular culture", "weight": 2.0, "year": 2011}, {"source": "47", "target": "82", "source_name": "hard rock", "target_name": "heavy metal", "weight": 4.0, "year": 2011}, {"source": "47", "target": "89", "source_name": "hard rock", "target_name": "electronic music", "weight": 1.0, "year": 2011}, {"source": "48", "target": "49", "source_name": "pop music", "target_name": "music theory", "weight": 1.0, "year": 2011}, {"source": "48", "target": "51", "source_name": "pop music", "target_name": "cultural identity", "weight": 3.0, "year": 2011}, {"source": "48", "target": "52", "source_name": "pop music", "target_name": "folk song", "weight": 2.0, "year": 2011}, {"source": "48", "target": "53", "source_name": "pop music", "target_name": "popular music", "weight": 30.0, "year": 2011}, {"source": "48", "target": "55", "source_name": "pop music", "target_name": "rock criticism", "weight": 2.0, "year": 2011}, {"source": "48", "target": "57", "source_name": "pop music", "target_name": "north america", "weight": 2.0, "year": 2011}, {"source": "48", "target": "59", "source_name": "pop music", "target_name": "college students", "weight": 2.0, "year": 2011}, {"source": "48", "target": "60", "source_name": "pop music", "target_name": "cultural studies", "weight": 1.0, "year": 2011}, {"source": "48", "target": "62", "source_name": "pop music", "target_name": "led zeppelin", "weight": 1.0, "year": 2011}, {"source": "48", "target": "64", "source_name": "pop music", "target_name": "english language", "weight": 2.0, "year": 2011}, {"source": "48", "target": "65", "source_name": "pop music", "target_name": "country music", "weight": 1.0, "year": 2011}, {"source": "48", "target": "66", "source_name": "pop music", "target_name": "hong kong", "weight": 4.0, "year": 2011}, {"source": "48", "target": "67", "source_name": "pop music", "target_name": "rock art", "weight": 3.0, "year": 2011}, {"source": "48", "target": "69", "source_name": "pop music", "target_name": "classical music", "weight": 5.0, "year": 2011}, {"source": "48", "target": "70", "source_name": "pop music", "target_name": "world war", "weight": 2.0, "year": 2011}, {"source": "48", "target": "71", "source_name": "pop music", "target_name": "latin american", "weight": 1.0, "year": 2011}, {"source": "48", "target": "72", "source_name": "pop music", "target_name": "jimi hendrix", "weight": 3.0, "year": 2011}, {"source": "48", "target": "74", "source_name": "pop music", "target_name": "united states", "weight": 4.0, "year": 2011}, {"source": "48", "target": "76", "source_name": "pop music", "target_name": "los angeles", "weight": 1.0, "year": 2011}, {"source": "48", "target": "77", "source_name": "pop music", "target_name": "rock music", "weight": 28.0, "year": 2011}, {"source": "48", "target": "78", "source_name": "pop music", "target_name": "hip hop", "weight": 2.0, "year": 2011}, {"source": "48", "target": "79", "source_name": "pop music", "target_name": "popular culture", "weight": 3.0, "year": 2011}, {"source": "48", "target": "80", "source_name": "pop music", "target_name": "folk music", "weight": 4.0, "year": 2011}, {"source": "48", "target": "82", "source_name": "pop music", "target_name": "heavy metal", "weight": 2.0, "year": 2011}, {"source": "48", "target": "83", "source_name": "pop music", "target_name": "folk rock", "weight": 2.0, "year": 2011}, {"source": "49", "target": "53", "source_name": "music theory", "target_name": "popular music", "weight": 4.0, "year": 2011}, {"source": "49", "target": "54", "source_name": "music theory", "target_name": "american popular music", "weight": 1.0, "year": 2011}, {"source": "49", "target": "55", "source_name": "music theory", "target_name": "rock criticism", "weight": 1.0, "year": 2011}, {"source": "49", "target": "57", "source_name": "music theory", "target_name": "north america", "weight": 2.0, "year": 2011}, {"source": "49", "target": "61", "source_name": "music theory", "target_name": "progressive rock", "weight": 1.0, "year": 2011}, {"source": "49", "target": "69", "source_name": "music theory", "target_name": "classical music", "weight": 1.0, "year": 2011}, {"source": "49", "target": "72", "source_name": "music theory", "target_name": "jimi hendrix", "weight": 1.0, "year": 2011}, {"source": "49", "target": "77", "source_name": "music theory", "target_name": "rock music", "weight": 3.0, "year": 2011}, {"source": "49", "target": "78", "source_name": "music theory", "target_name": "hip hop", "weight": 1.0, "year": 2011}, {"source": "49", "target": "88", "source_name": "music theory", "target_name": "oxford university press", "weight": 2.0, "year": 2011}, {"source": "49", "target": "89", "source_name": "music theory", "target_name": "electronic music", "weight": 1.0, "year": 2011}, {"source": "50", "target": "53", "source_name": "hollywood film", "target_name": "popular music", "weight": 1.0, "year": 2011}, {"source": "50", "target": "79", "source_name": "hollywood film", "target_name": "popular culture", "weight": 1.0, "year": 2011}, {"source": "51", "target": "52", "source_name": "cultural identity", "target_name": "folk song", "weight": 1.0, "year": 2011}, {"source": "51", "target": "53", "source_name": "cultural identity", "target_name": "popular music", "weight": 2.0, "year": 2011}, {"source": "51", "target": "60", "source_name": "cultural identity", "target_name": "cultural studies", "weight": 2.0, "year": 2011}, {"source": "51", "target": "65", "source_name": "cultural identity", "target_name": "country music", "weight": 1.0, "year": 2011}, {"source": "51", "target": "66", "source_name": "cultural identity", "target_name": "hong kong", "weight": 1.0, "year": 2011}, {"source": "51", "target": "72", "source_name": "cultural identity", "target_name": "jimi hendrix", "weight": 2.0, "year": 2011}, {"source": "51", "target": "74", "source_name": "cultural identity", "target_name": "united states", "weight": 2.0, "year": 2011}, {"source": "51", "target": "77", "source_name": "cultural identity", "target_name": "rock music", "weight": 6.0, "year": 2011}, {"source": "51", "target": "79", "source_name": "cultural identity", "target_name": "popular culture", "weight": 2.0, "year": 2011}, {"source": "51", "target": "80", "source_name": "cultural identity", "target_name": "folk music", "weight": 1.0, "year": 2011}, {"source": "52", "target": "53", "source_name": "folk song", "target_name": "popular music", "weight": 7.0, "year": 2011}, {"source": "52", "target": "54", "source_name": "folk song", "target_name": "american popular music", "weight": 1.0, "year": 2011}, {"source": "52", "target": "65", "source_name": "folk song", "target_name": "country music", "weight": 1.0, "year": 2011}, {"source": "52", "target": "66", "source_name": "folk song", "target_name": "hong kong", "weight": 1.0, "year": 2011}, {"source": "52", "target": "69", "source_name": "folk song", "target_name": "classical music", "weight": 2.0, "year": 2011}, {"source": "52", "target": "74", "source_name": "folk song", "target_name": "united states", "weight": 1.0, "year": 2011}, {"source": "52", "target": "77", "source_name": "folk song", "target_name": "rock music", "weight": 3.0, "year": 2011}, {"source": "52", "target": "80", "source_name": "folk song", "target_name": "folk music", "weight": 6.0, "year": 2011}, {"source": "52", "target": "87", "source_name": "folk song", "target_name": "music hall", "weight": 1.0, "year": 2011}, {"source": "52", "target": "89", "source_name": "folk song", "target_name": "electronic music", "weight": 1.0, "year": 2011}, {"source": "53", "target": "54", "source_name": "popular music", "target_name": "american popular music", "weight": 13.0, "year": 2011}, {"source": "53", "target": "55", "source_name": "popular music", "target_name": "rock criticism", "weight": 4.0, "year": 2011}, {"source": "53", "target": "56", "source_name": "popular music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2011}, {"source": "53", "target": "57", "source_name": "popular music", "target_name": "north america", "weight": 6.0, "year": 2011}, {"source": "53", "target": "58", "source_name": "popular music", "target_name": "music therapy", "weight": 1.0, "year": 2011}, {"source": "53", "target": "59", "source_name": "popular music", "target_name": "college students", "weight": 3.0, "year": 2011}, {"source": "53", "target": "60", "source_name": "popular music", "target_name": "cultural studies", "weight": 6.0, "year": 2011}, {"source": "53", "target": "61", "source_name": "popular music", "target_name": "progressive rock", "weight": 6.0, "year": 2011}, {"source": "53", "target": "62", "source_name": "popular music", "target_name": "led zeppelin", "weight": 2.0, "year": 2011}, {"source": "53", "target": "64", "source_name": "popular music", "target_name": "english language", "weight": 1.0, "year": 2011}, {"source": "53", "target": "65", "source_name": "popular music", "target_name": "country music", "weight": 11.0, "year": 2011}, {"source": "53", "target": "66", "source_name": "popular music", "target_name": "hong kong", "weight": 4.0, "year": 2011}, {"source": "53", "target": "67", "source_name": "popular music", "target_name": "rock art", "weight": 7.0, "year": 2011}, {"source": "53", "target": "69", "source_name": "popular music", "target_name": "classical music", "weight": 11.0, "year": 2011}, {"source": "53", "target": "70", "source_name": "popular music", "target_name": "world war", "weight": 6.0, "year": 2011}, {"source": "53", "target": "71", "source_name": "popular music", "target_name": "latin american", "weight": 2.0, "year": 2011}, {"source": "53", "target": "72", "source_name": "popular music", "target_name": "jimi hendrix", "weight": 5.0, "year": 2011}, {"source": "53", "target": "73", "source_name": "popular music", "target_name": "southern rock", "weight": 2.0, "year": 2011}, {"source": "53", "target": "74", "source_name": "popular music", "target_name": "united states", "weight": 18.0, "year": 2011}, {"source": "53", "target": "75", "source_name": "popular music", "target_name": "world war ii", "weight": 4.0, "year": 2011}, {"source": "53", "target": "76", "source_name": "popular music", "target_name": "los angeles", "weight": 6.0, "year": 2011}, {"source": "53", "target": "77", "source_name": "popular music", "target_name": "rock music", "weight": 100.0, "year": 2011}, {"source": "53", "target": "78", "source_name": "popular music", "target_name": "hip hop", "weight": 10.0, "year": 2011}, {"source": "53", "target": "79", "source_name": "popular music", "target_name": "popular culture", "weight": 19.0, "year": 2011}, {"source": "53", "target": "80", "source_name": "popular music", "target_name": "folk music", "weight": 15.0, "year": 2011}, {"source": "53", "target": "82", "source_name": "popular music", "target_name": "heavy metal", "weight": 8.0, "year": 2011}, {"source": "53", "target": "83", "source_name": "popular music", "target_name": "folk rock", "weight": 2.0, "year": 2011}, {"source": "53", "target": "85", "source_name": "popular music", "target_name": "jewish music", "weight": 2.0, "year": 2011}, {"source": "53", "target": "87", "source_name": "popular music", "target_name": "music hall", "weight": 2.0, "year": 2011}, {"source": "53", "target": "88", "source_name": "popular music", "target_name": "oxford university press", "weight": 4.0, "year": 2011}, {"source": "53", "target": "89", "source_name": "popular music", "target_name": "electronic music", "weight": 7.0, "year": 2011}, {"source": "54", "target": "55", "source_name": "american popular music", "target_name": "rock criticism", "weight": 1.0, "year": 2011}, {"source": "54", "target": "65", "source_name": "american popular music", "target_name": "country music", "weight": 5.0, "year": 2011}, {"source": "54", "target": "69", "source_name": "american popular music", "target_name": "classical music", "weight": 3.0, "year": 2011}, {"source": "54", "target": "70", "source_name": "american popular music", "target_name": "world war", "weight": 1.0, "year": 2011}, {"source": "54", "target": "71", "source_name": "american popular music", "target_name": "latin american", "weight": 1.0, "year": 2011}, {"source": "54", "target": "74", "source_name": "american popular music", "target_name": "united states", "weight": 5.0, "year": 2011}, {"source": "54", "target": "75", "source_name": "american popular music", "target_name": "world war ii", "weight": 1.0, "year": 2011}, {"source": "54", "target": "76", "source_name": "american popular music", "target_name": "los angeles", "weight": 1.0, "year": 2011}, {"source": "54", "target": "77", "source_name": "american popular music", "target_name": "rock music", "weight": 3.0, "year": 2011}, {"source": "54", "target": "78", "source_name": "american popular music", "target_name": "hip hop", "weight": 2.0, "year": 2011}, {"source": "54", "target": "79", "source_name": "american popular music", "target_name": "popular culture", "weight": 1.0, "year": 2011}, {"source": "54", "target": "80", "source_name": "american popular music", "target_name": "folk music", "weight": 1.0, "year": 2011}, {"source": "54", "target": "88", "source_name": "american popular music", "target_name": "oxford university press", "weight": 1.0, "year": 2011}, {"source": "54", "target": "89", "source_name": "american popular music", "target_name": "electronic music", "weight": 1.0, "year": 2011}, {"source": "55", "target": "56", "source_name": "rock criticism", "target_name": "bruce springsteen", "weight": 1.0, "year": 2011}, {"source": "55", "target": "57", "source_name": "rock criticism", "target_name": "north america", "weight": 1.0, "year": 2011}, {"source": "55", "target": "61", "source_name": "rock criticism", "target_name": "progressive rock", "weight": 2.0, "year": 2011}, {"source": "55", "target": "65", "source_name": "rock criticism", "target_name": "country music", "weight": 1.0, "year": 2011}, {"source": "55", "target": "69", "source_name": "rock criticism", "target_name": "classical music", "weight": 1.0, "year": 2011}, {"source": "55", "target": "74", "source_name": "rock criticism", "target_name": "united states", "weight": 2.0, "year": 2011}, {"source": "55", "target": "77", "source_name": "rock criticism", "target_name": "rock music", "weight": 5.0, "year": 2011}, {"source": "55", "target": "78", "source_name": "rock criticism", "target_name": "hip hop", "weight": 1.0, "year": 2011}, {"source": "55", "target": "79", "source_name": "rock criticism", "target_name": "popular culture", "weight": 1.0, "year": 2011}, {"source": "55", "target": "88", "source_name": "rock criticism", "target_name": "oxford university press", "weight": 1.0, "year": 2011}, {"source": "56", "target": "72", "source_name": "bruce springsteen", "target_name": "jimi hendrix", "weight": 1.0, "year": 2011}, {"source": "56", "target": "77", "source_name": "bruce springsteen", "target_name": "rock music", "weight": 2.0, "year": 2011}, {"source": "56", "target": "78", "source_name": "bruce springsteen", "target_name": "hip hop", "weight": 1.0, "year": 2011}, {"source": "56", "target": "79", "source_name": "bruce springsteen", "target_name": "popular culture", "weight": 1.0, "year": 2011}, {"source": "56", "target": "82", "source_name": "bruce springsteen", "target_name": "heavy metal", "weight": 1.0, "year": 2011}, {"source": "57", "target": "61", "source_name": "north america", "target_name": "progressive rock", "weight": 1.0, "year": 2011}, {"source": "57", "target": "65", "source_name": "north america", "target_name": "country music", "weight": 2.0, "year": 2011}, {"source": "57", "target": "71", "source_name": "north america", "target_name": "latin american", "weight": 1.0, "year": 2011}, {"source": "57", "target": "73", "source_name": "north america", "target_name": "southern rock", "weight": 1.0, "year": 2011}, {"source": "57", "target": "74", "source_name": "north america", "target_name": "united states", "weight": 3.0, "year": 2011}, {"source": "57", "target": "77", "source_name": "north america", "target_name": "rock music", "weight": 4.0, "year": 2011}, {"source": "57", "target": "78", "source_name": "north america", "target_name": "hip hop", "weight": 1.0, "year": 2011}, {"source": "57", "target": "80", "source_name": "north america", "target_name": "folk music", "weight": 2.0, "year": 2011}, {"source": "58", "target": "64", "source_name": "music therapy", "target_name": "english language", "weight": 1.0, "year": 2011}, {"source": "58", "target": "77", "source_name": "music therapy", "target_name": "rock music", "weight": 3.0, "year": 2011}, {"source": "59", "target": "69", "source_name": "college students", "target_name": "classical music", "weight": 1.0, "year": 2011}, {"source": "59", "target": "74", "source_name": "college students", "target_name": "united states", "weight": 1.0, "year": 2011}, {"source": "59", "target": "77", "source_name": "college students", "target_name": "rock music", "weight": 2.0, "year": 2011}, {"source": "59", "target": "82", "source_name": "college students", "target_name": "heavy metal", "weight": 1.0, "year": 2011}, {"source": "60", "target": "62", "source_name": "cultural studies", "target_name": "led zeppelin", "weight": 1.0, "year": 2011}, {"source": "60", "target": "71", "source_name": "cultural studies", "target_name": "latin american", "weight": 1.0, "year": 2011}, {"source": "60", "target": "74", "source_name": "cultural studies", "target_name": "united states", "weight": 1.0, "year": 2011}, {"source": "60", "target": "76", "source_name": "cultural studies", "target_name": "los angeles", "weight": 1.0, "year": 2011}, {"source": "60", "target": "77", "source_name": "cultural studies", "target_name": "rock music", "weight": 5.0, "year": 2011}, {"source": "60", "target": "79", "source_name": "cultural studies", "target_name": "popular culture", "weight": 4.0, "year": 2011}, {"source": "60", "target": "80", "source_name": "cultural studies", "target_name": "folk music", "weight": 1.0, "year": 2011}, {"source": "60", "target": "85", "source_name": "cultural studies", "target_name": "jewish music", "weight": 1.0, "year": 2011}, {"source": "60", "target": "87", "source_name": "cultural studies", "target_name": "music hall", "weight": 1.0, "year": 2011}, {"source": "60", "target": "88", "source_name": "cultural studies", "target_name": "oxford university press", "weight": 3.0, "year": 2011}, {"source": "60", "target": "89", "source_name": "cultural studies", "target_name": "electronic music", "weight": 1.0, "year": 2011}, {"source": "61", "target": "69", "source_name": "progressive rock", "target_name": "classical music", "weight": 2.0, "year": 2011}, {"source": "61", "target": "72", "source_name": "progressive rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2011}, {"source": "61", "target": "74", "source_name": "progressive rock", "target_name": "united states", "weight": 1.0, "year": 2011}, {"source": "61", "target": "77", "source_name": "progressive rock", "target_name": "rock music", "weight": 19.0, "year": 2011}, {"source": "61", "target": "80", "source_name": "progressive rock", "target_name": "folk music", "weight": 1.0, "year": 2011}, {"source": "61", "target": "82", "source_name": "progressive rock", "target_name": "heavy metal", "weight": 1.0, "year": 2011}, {"source": "61", "target": "88", "source_name": "progressive rock", "target_name": "oxford university press", "weight": 1.0, "year": 2011}, {"source": "61", "target": "89", "source_name": "progressive rock", "target_name": "electronic music", "weight": 1.0, "year": 2011}, {"source": "62", "target": "69", "source_name": "led zeppelin", "target_name": "classical music", "weight": 1.0, "year": 2011}, {"source": "62", "target": "77", "source_name": "led zeppelin", "target_name": "rock music", "weight": 1.0, "year": 2011}, {"source": "62", "target": "88", "source_name": "led zeppelin", "target_name": "oxford university press", "weight": 1.0, "year": 2011}, {"source": "64", "target": "66", "source_name": "english language", "target_name": "hong kong", "weight": 1.0, "year": 2011}, {"source": "64", "target": "67", "source_name": "english language", "target_name": "rock art", "weight": 1.0, "year": 2011}, {"source": "64", "target": "70", "source_name": "english language", "target_name": "world war", "weight": 1.0, "year": 2011}, {"source": "64", "target": "74", "source_name": "english language", "target_name": "united states", "weight": 1.0, "year": 2011}, {"source": "64", "target": "77", "source_name": "english language", "target_name": "rock music", "weight": 2.0, "year": 2011}, {"source": "64", "target": "79", "source_name": "english language", "target_name": "popular culture", "weight": 1.0, "year": 2011}, {"source": "64", "target": "83", "source_name": "english language", "target_name": "folk rock", "weight": 1.0, "year": 2011}, {"source": "65", "target": "69", "source_name": "country music", "target_name": "classical music", "weight": 3.0, "year": 2011}, {"source": "65", "target": "72", "source_name": "country music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2011}, {"source": "65", "target": "73", "source_name": "country music", "target_name": "southern rock", "weight": 2.0, "year": 2011}, {"source": "65", "target": "74", "source_name": "country music", "target_name": "united states", "weight": 3.0, "year": 2011}, {"source": "65", "target": "77", "source_name": "country music", "target_name": "rock music", "weight": 4.0, "year": 2011}, {"source": "65", "target": "78", "source_name": "country music", "target_name": "hip hop", "weight": 1.0, "year": 2011}, {"source": "65", "target": "79", "source_name": "country music", "target_name": "popular culture", "weight": 2.0, "year": 2011}, {"source": "65", "target": "80", "source_name": "country music", "target_name": "folk music", "weight": 3.0, "year": 2011}, {"source": "65", "target": "82", "source_name": "country music", "target_name": "heavy metal", "weight": 1.0, "year": 2011}, {"source": "65", "target": "89", "source_name": "country music", "target_name": "electronic music", "weight": 2.0, "year": 2011}, {"source": "66", "target": "67", "source_name": "hong kong", "target_name": "rock art", "weight": 1.0, "year": 2011}, {"source": "66", "target": "77", "source_name": "hong kong", "target_name": "rock music", "weight": 2.0, "year": 2011}, {"source": "66", "target": "78", "source_name": "hong kong", "target_name": "hip hop", "weight": 1.0, "year": 2011}, {"source": "66", "target": "80", "source_name": "hong kong", "target_name": "folk music", "weight": 1.0, "year": 2011}, {"source": "66", "target": "83", "source_name": "hong kong", "target_name": "folk rock", "weight": 1.0, "year": 2011}, {"source": "66", "target": "85", "source_name": "hong kong", "target_name": "jewish music", "weight": 1.0, "year": 2011}, {"source": "67", "target": "74", "source_name": "rock art", "target_name": "united states", "weight": 1.0, "year": 2011}, {"source": "67", "target": "77", "source_name": "rock art", "target_name": "rock music", "weight": 5.0, "year": 2011}, {"source": "67", "target": "79", "source_name": "rock art", "target_name": "popular culture", "weight": 1.0, "year": 2011}, {"source": "67", "target": "83", "source_name": "rock art", "target_name": "folk rock", "weight": 1.0, "year": 2011}, {"source": "67", "target": "89", "source_name": "rock art", "target_name": "electronic music", "weight": 1.0, "year": 2011}, {"source": "68", "target": "77", "source_name": "hearing loss", "target_name": "rock music", "weight": 3.0, "year": 2011}, {"source": "69", "target": "70", "source_name": "classical music", "target_name": "world war", "weight": 1.0, "year": 2011}, {"source": "69", "target": "71", "source_name": "classical music", "target_name": "latin american", "weight": 1.0, "year": 2011}, {"source": "69", "target": "72", "source_name": "classical music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2011}, {"source": "69", "target": "74", "source_name": "classical music", "target_name": "united states", "weight": 4.0, "year": 2011}, {"source": "69", "target": "76", "source_name": "classical music", "target_name": "los angeles", "weight": 1.0, "year": 2011}, {"source": "69", "target": "77", "source_name": "classical music", "target_name": "rock music", "weight": 28.0, "year": 2011}, {"source": "69", "target": "78", "source_name": "classical music", "target_name": "hip hop", "weight": 2.0, "year": 2011}, {"source": "69", "target": "79", "source_name": "classical music", "target_name": "popular culture", "weight": 2.0, "year": 2011}, {"source": "69", "target": "80", "source_name": "classical music", "target_name": "folk music", "weight": 4.0, "year": 2011}, {"source": "69", "target": "82", "source_name": "classical music", "target_name": "heavy metal", "weight": 3.0, "year": 2011}, {"source": "69", "target": "87", "source_name": "classical music", "target_name": "music hall", "weight": 1.0, "year": 2011}, {"source": "69", "target": "88", "source_name": "classical music", "target_name": "oxford university press", "weight": 1.0, "year": 2011}, {"source": "69", "target": "89", "source_name": "classical music", "target_name": "electronic music", "weight": 2.0, "year": 2011}, {"source": "70", "target": "74", "source_name": "world war", "target_name": "united states", "weight": 2.0, "year": 2011}, {"source": "70", "target": "75", "source_name": "world war", "target_name": "world war ii", "weight": 4.0, "year": 2011}, {"source": "70", "target": "77", "source_name": "world war", "target_name": "rock music", "weight": 6.0, "year": 2011}, {"source": "70", "target": "79", "source_name": "world war", "target_name": "popular culture", "weight": 1.0, "year": 2011}, {"source": "70", "target": "80", "source_name": "world war", "target_name": "folk music", "weight": 1.0, "year": 2011}, {"source": "70", "target": "87", "source_name": "world war", "target_name": "music hall", "weight": 1.0, "year": 2011}, {"source": "70", "target": "89", "source_name": "world war", "target_name": "electronic music", "weight": 1.0, "year": 2011}, {"source": "71", "target": "74", "source_name": "latin american", "target_name": "united states", "weight": 3.0, "year": 2011}, {"source": "71", "target": "76", "source_name": "latin american", "target_name": "los angeles", "weight": 2.0, "year": 2011}, {"source": "71", "target": "77", "source_name": "latin american", "target_name": "rock music", "weight": 4.0, "year": 2011}, {"source": "71", "target": "79", "source_name": "latin american", "target_name": "popular culture", "weight": 1.0, "year": 2011}, {"source": "72", "target": "74", "source_name": "jimi hendrix", "target_name": "united states", "weight": 1.0, "year": 2011}, {"source": "72", "target": "77", "source_name": "jimi hendrix", "target_name": "rock music", "weight": 6.0, "year": 2011}, {"source": "72", "target": "79", "source_name": "jimi hendrix", "target_name": "popular culture", "weight": 2.0, "year": 2011}, {"source": "72", "target": "80", "source_name": "jimi hendrix", "target_name": "folk music", "weight": 1.0, "year": 2011}, {"source": "72", "target": "89", "source_name": "jimi hendrix", "target_name": "electronic music", "weight": 1.0, "year": 2011}, {"source": "73", "target": "77", "source_name": "southern rock", "target_name": "rock music", "weight": 1.0, "year": 2011}, {"source": "73", "target": "80", "source_name": "southern rock", "target_name": "folk music", "weight": 1.0, "year": 2011}, {"source": "74", "target": "76", "source_name": "united states", "target_name": "los angeles", "weight": 1.0, "year": 2011}, {"source": "74", "target": "77", "source_name": "united states", "target_name": "rock music", "weight": 11.0, "year": 2011}, {"source": "74", "target": "78", "source_name": "united states", "target_name": "hip hop", "weight": 1.0, "year": 2011}, {"source": "74", "target": "79", "source_name": "united states", "target_name": "popular culture", "weight": 3.0, "year": 2011}, {"source": "74", "target": "80", "source_name": "united states", "target_name": "folk music", "weight": 3.0, "year": 2011}, {"source": "74", "target": "88", "source_name": "united states", "target_name": "oxford university press", "weight": 1.0, "year": 2011}, {"source": "74", "target": "89", "source_name": "united states", "target_name": "electronic music", "weight": 3.0, "year": 2011}, {"source": "75", "target": "77", "source_name": "world war ii", "target_name": "rock music", "weight": 2.0, "year": 2011}, {"source": "76", "target": "77", "source_name": "los angeles", "target_name": "rock music", "weight": 6.0, "year": 2011}, {"source": "76", "target": "79", "source_name": "los angeles", "target_name": "popular culture", "weight": 1.0, "year": 2011}, {"source": "77", "target": "78", "source_name": "rock music", "target_name": "hip hop", "weight": 3.0, "year": 2011}, {"source": "77", "target": "79", "source_name": "rock music", "target_name": "popular culture", "weight": 16.0, "year": 2011}, {"source": "77", "target": "80", "source_name": "rock music", "target_name": "folk music", "weight": 8.0, "year": 2011}, {"source": "77", "target": "82", "source_name": "rock music", "target_name": "heavy metal", "weight": 9.0, "year": 2011}, {"source": "77", "target": "87", "source_name": "rock music", "target_name": "music hall", "weight": 3.0, "year": 2011}, {"source": "77", "target": "88", "source_name": "rock music", "target_name": "oxford university press", "weight": 2.0, "year": 2011}, {"source": "77", "target": "89", "source_name": "rock music", "target_name": "electronic music", "weight": 5.0, "year": 2011}, {"source": "78", "target": "79", "source_name": "hip hop", "target_name": "popular culture", "weight": 2.0, "year": 2011}, {"source": "78", "target": "80", "source_name": "hip hop", "target_name": "folk music", "weight": 3.0, "year": 2011}, {"source": "78", "target": "82", "source_name": "hip hop", "target_name": "heavy metal", "weight": 2.0, "year": 2011}, {"source": "78", "target": "85", "source_name": "hip hop", "target_name": "jewish music", "weight": 1.0, "year": 2011}, {"source": "78", "target": "88", "source_name": "hip hop", "target_name": "oxford university press", "weight": 1.0, "year": 2011}, {"source": "79", "target": "80", "source_name": "popular culture", "target_name": "folk music", "weight": 2.0, "year": 2011}, {"source": "79", "target": "82", "source_name": "popular culture", "target_name": "heavy metal", "weight": 2.0, "year": 2011}, {"source": "79", "target": "85", "source_name": "popular culture", "target_name": "jewish music", "weight": 1.0, "year": 2011}, {"source": "79", "target": "87", "source_name": "popular culture", "target_name": "music hall", "weight": 2.0, "year": 2011}, {"source": "79", "target": "88", "source_name": "popular culture", "target_name": "oxford university press", "weight": 1.0, "year": 2011}, {"source": "79", "target": "89", "source_name": "popular culture", "target_name": "electronic music", "weight": 1.0, "year": 2011}, {"source": "80", "target": "85", "source_name": "folk music", "target_name": "jewish music", "weight": 2.0, "year": 2011}, {"source": "80", "target": "87", "source_name": "folk music", "target_name": "music hall", "weight": 1.0, "year": 2011}, {"source": "80", "target": "88", "source_name": "folk music", "target_name": "oxford university press", "weight": 1.0, "year": 2011}, {"source": "80", "target": "89", "source_name": "folk music", "target_name": "electronic music", "weight": 3.0, "year": 2011}, {"source": "85", "target": "88", "source_name": "jewish music", "target_name": "oxford university press", "weight": 1.0, "year": 2011}, {"source": "88", "target": "89", "source_name": "oxford university press", "target_name": "electronic music", "weight": 1.0, "year": 2011}]}, {"2012": [{"source": "1", "target": "7", "source_name": "rock star", "target_name": "nineteenth century", "weight": 1.0, "year": 2012}, {"source": "1", "target": "9", "source_name": "rock star", "target_name": "compact disc", "weight": 1.0, "year": 2012}, {"source": "1", "target": "19", "source_name": "rock star", "target_name": "music video", "weight": 1.0, "year": 2012}, {"source": "1", "target": "28", "source_name": "rock star", "target_name": "high school", "weight": 1.0, "year": 2012}, {"source": "1", "target": "29", "source_name": "rock star", "target_name": "rolling stone", "weight": 1.0, "year": 2012}, {"source": "1", "target": "36", "source_name": "rock star", "target_name": "music industry", "weight": 3.0, "year": 2012}, {"source": "1", "target": "41", "source_name": "rock star", "target_name": "youth culture", "weight": 2.0, "year": 2012}, {"source": "1", "target": "42", "source_name": "rock star", "target_name": "simon frith", "weight": 1.0, "year": 2012}, {"source": "1", "target": "48", "source_name": "rock star", "target_name": "pop music", "weight": 4.0, "year": 2012}, {"source": "1", "target": "51", "source_name": "rock star", "target_name": "cultural identity", "weight": 1.0, "year": 2012}, {"source": "1", "target": "53", "source_name": "rock star", "target_name": "popular music", "weight": 4.0, "year": 2012}, {"source": "1", "target": "60", "source_name": "rock star", "target_name": "cultural studies", "weight": 1.0, "year": 2012}, {"source": "1", "target": "69", "source_name": "rock star", "target_name": "classical music", "weight": 1.0, "year": 2012}, {"source": "1", "target": "74", "source_name": "rock star", "target_name": "united states", "weight": 1.0, "year": 2012}, {"source": "1", "target": "77", "source_name": "rock star", "target_name": "rock music", "weight": 8.0, "year": 2012}, {"source": "1", "target": "82", "source_name": "rock star", "target_name": "heavy metal", "weight": 2.0, "year": 2012}, {"source": "2", "target": "3", "source_name": "indie rock", "target_name": "glam rock", "weight": 1.0, "year": 2012}, {"source": "2", "target": "19", "source_name": "indie rock", "target_name": "music video", "weight": 1.0, "year": 2012}, {"source": "2", "target": "20", "source_name": "indie rock", "target_name": "garage rock", "weight": 1.0, "year": 2012}, {"source": "2", "target": "24", "source_name": "indie rock", "target_name": "punk rock", "weight": 1.0, "year": 2012}, {"source": "2", "target": "27", "source_name": "indie rock", "target_name": "pop rock", "weight": 1.0, "year": 2012}, {"source": "2", "target": "36", "source_name": "indie rock", "target_name": "music industry", "weight": 1.0, "year": 2012}, {"source": "2", "target": "44", "source_name": "indie rock", "target_name": "alternative rock", "weight": 1.0, "year": 2012}, {"source": "2", "target": "47", "source_name": "indie rock", "target_name": "hard rock", "weight": 1.0, "year": 2012}, {"source": "2", "target": "48", "source_name": "indie rock", "target_name": "pop music", "weight": 2.0, "year": 2012}, {"source": "2", "target": "51", "source_name": "indie rock", "target_name": "cultural identity", "weight": 1.0, "year": 2012}, {"source": "2", "target": "53", "source_name": "indie rock", "target_name": "popular music", "weight": 2.0, "year": 2012}, {"source": "2", "target": "67", "source_name": "indie rock", "target_name": "rock art", "weight": 1.0, "year": 2012}, {"source": "2", "target": "72", "source_name": "indie rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2012}, {"source": "2", "target": "74", "source_name": "indie rock", "target_name": "united states", "weight": 1.0, "year": 2012}, {"source": "2", "target": "77", "source_name": "indie rock", "target_name": "rock music", "weight": 5.0, "year": 2012}, {"source": "2", "target": "78", "source_name": "indie rock", "target_name": "hip hop", "weight": 1.0, "year": 2012}, {"source": "2", "target": "80", "source_name": "indie rock", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "3", "target": "20", "source_name": "glam rock", "target_name": "garage rock", "weight": 1.0, "year": 2012}, {"source": "3", "target": "24", "source_name": "glam rock", "target_name": "punk rock", "weight": 1.0, "year": 2012}, {"source": "3", "target": "27", "source_name": "glam rock", "target_name": "pop rock", "weight": 1.0, "year": 2012}, {"source": "3", "target": "44", "source_name": "glam rock", "target_name": "alternative rock", "weight": 1.0, "year": 2012}, {"source": "3", "target": "47", "source_name": "glam rock", "target_name": "hard rock", "weight": 1.0, "year": 2012}, {"source": "3", "target": "77", "source_name": "glam rock", "target_name": "rock music", "weight": 2.0, "year": 2012}, {"source": "3", "target": "79", "source_name": "glam rock", "target_name": "popular culture", "weight": 1.0, "year": 2012}, {"source": "4", "target": "7", "source_name": "gregorian chant", "target_name": "nineteenth century", "weight": 1.0, "year": 2012}, {"source": "4", "target": "9", "source_name": "gregorian chant", "target_name": "compact disc", "weight": 1.0, "year": 2012}, {"source": "4", "target": "10", "source_name": "gregorian chant", "target_name": "african american", "weight": 1.0, "year": 2012}, {"source": "4", "target": "19", "source_name": "gregorian chant", "target_name": "music video", "weight": 1.0, "year": 2012}, {"source": "4", "target": "22", "source_name": "gregorian chant", "target_name": "chamber music", "weight": 1.0, "year": 2012}, {"source": "4", "target": "36", "source_name": "gregorian chant", "target_name": "music industry", "weight": 1.0, "year": 2012}, {"source": "4", "target": "37", "source_name": "gregorian chant", "target_name": "middle ages", "weight": 1.0, "year": 2012}, {"source": "4", "target": "38", "source_name": "gregorian chant", "target_name": "summary additional listening", "weight": 1.0, "year": 2012}, {"source": "4", "target": "40", "source_name": "gregorian chant", "target_name": "musical instruments", "weight": 1.0, "year": 2012}, {"source": "4", "target": "48", "source_name": "gregorian chant", "target_name": "pop music", "weight": 1.0, "year": 2012}, {"source": "4", "target": "52", "source_name": "gregorian chant", "target_name": "folk song", "weight": 1.0, "year": 2012}, {"source": "4", "target": "53", "source_name": "gregorian chant", "target_name": "popular music", "weight": 1.0, "year": 2012}, {"source": "4", "target": "54", "source_name": "gregorian chant", "target_name": "american popular music", "weight": 1.0, "year": 2012}, {"source": "4", "target": "65", "source_name": "gregorian chant", "target_name": "country music", "weight": 1.0, "year": 2012}, {"source": "4", "target": "69", "source_name": "gregorian chant", "target_name": "classical music", "weight": 1.0, "year": 2012}, {"source": "4", "target": "74", "source_name": "gregorian chant", "target_name": "united states", "weight": 1.0, "year": 2012}, {"source": "4", "target": "80", "source_name": "gregorian chant", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "4", "target": "89", "source_name": "gregorian chant", "target_name": "electronic music", "weight": 1.0, "year": 2012}, {"source": "5", "target": "12", "source_name": "jesus christ superstar", "target_name": "rock opera", "weight": 2.0, "year": 2012}, {"source": "5", "target": "15", "source_name": "jesus christ superstar", "target_name": "musical theatre", "weight": 3.0, "year": 2012}, {"source": "5", "target": "33", "source_name": "jesus christ superstar", "target_name": "jesus christ", "weight": 4.0, "year": 2012}, {"source": "5", "target": "34", "source_name": "jesus christ superstar", "target_name": "mass media", "weight": 1.0, "year": 2012}, {"source": "5", "target": "41", "source_name": "jesus christ superstar", "target_name": "youth culture", "weight": 1.0, "year": 2012}, {"source": "5", "target": "53", "source_name": "jesus christ superstar", "target_name": "popular music", "weight": 1.0, "year": 2012}, {"source": "5", "target": "77", "source_name": "jesus christ superstar", "target_name": "rock music", "weight": 6.0, "year": 2012}, {"source": "6", "target": "10", "source_name": "elvis presley", "target_name": "african american", "weight": 1.0, "year": 2012}, {"source": "6", "target": "16", "source_name": "elvis presley", "target_name": "bob dylan", "weight": 3.0, "year": 2012}, {"source": "6", "target": "17", "source_name": "elvis presley", "target_name": "civil rights", "weight": 1.0, "year": 2012}, {"source": "6", "target": "23", "source_name": "elvis presley", "target_name": "electronic dance music", "weight": 1.0, "year": 2012}, {"source": "6", "target": "29", "source_name": "elvis presley", "target_name": "rolling stone", "weight": 1.0, "year": 2012}, {"source": "6", "target": "36", "source_name": "elvis presley", "target_name": "music industry", "weight": 3.0, "year": 2012}, {"source": "6", "target": "40", "source_name": "elvis presley", "target_name": "musical instruments", "weight": 1.0, "year": 2012}, {"source": "6", "target": "41", "source_name": "elvis presley", "target_name": "youth culture", "weight": 1.0, "year": 2012}, {"source": "6", "target": "42", "source_name": "elvis presley", "target_name": "simon frith", "weight": 2.0, "year": 2012}, {"source": "6", "target": "47", "source_name": "elvis presley", "target_name": "hard rock", "weight": 1.0, "year": 2012}, {"source": "6", "target": "48", "source_name": "elvis presley", "target_name": "pop music", "weight": 1.0, "year": 2012}, {"source": "6", "target": "51", "source_name": "elvis presley", "target_name": "cultural identity", "weight": 1.0, "year": 2012}, {"source": "6", "target": "53", "source_name": "elvis presley", "target_name": "popular music", "weight": 6.0, "year": 2012}, {"source": "6", "target": "54", "source_name": "elvis presley", "target_name": "american popular music", "weight": 3.0, "year": 2012}, {"source": "6", "target": "56", "source_name": "elvis presley", "target_name": "bruce springsteen", "weight": 1.0, "year": 2012}, {"source": "6", "target": "60", "source_name": "elvis presley", "target_name": "cultural studies", "weight": 1.0, "year": 2012}, {"source": "6", "target": "67", "source_name": "elvis presley", "target_name": "rock art", "weight": 1.0, "year": 2012}, {"source": "6", "target": "70", "source_name": "elvis presley", "target_name": "world war", "weight": 1.0, "year": 2012}, {"source": "6", "target": "72", "source_name": "elvis presley", "target_name": "jimi hendrix", "weight": 1.0, "year": 2012}, {"source": "6", "target": "74", "source_name": "elvis presley", "target_name": "united states", "weight": 2.0, "year": 2012}, {"source": "6", "target": "75", "source_name": "elvis presley", "target_name": "world war ii", "weight": 1.0, "year": 2012}, {"source": "6", "target": "77", "source_name": "elvis presley", "target_name": "rock music", "weight": 4.0, "year": 2012}, {"source": "6", "target": "78", "source_name": "elvis presley", "target_name": "hip hop", "weight": 1.0, "year": 2012}, {"source": "6", "target": "79", "source_name": "elvis presley", "target_name": "popular culture", "weight": 1.0, "year": 2012}, {"source": "6", "target": "80", "source_name": "elvis presley", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "6", "target": "82", "source_name": "elvis presley", "target_name": "heavy metal", "weight": 1.0, "year": 2012}, {"source": "7", "target": "9", "source_name": "nineteenth century", "target_name": "compact disc", "weight": 1.0, "year": 2012}, {"source": "7", "target": "10", "source_name": "nineteenth century", "target_name": "african american", "weight": 1.0, "year": 2012}, {"source": "7", "target": "19", "source_name": "nineteenth century", "target_name": "music video", "weight": 1.0, "year": 2012}, {"source": "7", "target": "22", "source_name": "nineteenth century", "target_name": "chamber music", "weight": 1.0, "year": 2012}, {"source": "7", "target": "34", "source_name": "nineteenth century", "target_name": "mass media", "weight": 1.0, "year": 2012}, {"source": "7", "target": "36", "source_name": "nineteenth century", "target_name": "music industry", "weight": 1.0, "year": 2012}, {"source": "7", "target": "38", "source_name": "nineteenth century", "target_name": "summary additional listening", "weight": 1.0, "year": 2012}, {"source": "7", "target": "40", "source_name": "nineteenth century", "target_name": "musical instruments", "weight": 1.0, "year": 2012}, {"source": "7", "target": "43", "source_name": "nineteenth century", "target_name": "music education", "weight": 1.0, "year": 2012}, {"source": "7", "target": "45", "source_name": "nineteenth century", "target_name": "double bass", "weight": 2.0, "year": 2012}, {"source": "7", "target": "50", "source_name": "nineteenth century", "target_name": "hollywood film", "weight": 1.0, "year": 2012}, {"source": "7", "target": "52", "source_name": "nineteenth century", "target_name": "folk song", "weight": 2.0, "year": 2012}, {"source": "7", "target": "53", "source_name": "nineteenth century", "target_name": "popular music", "weight": 3.0, "year": 2012}, {"source": "7", "target": "54", "source_name": "nineteenth century", "target_name": "american popular music", "weight": 1.0, "year": 2012}, {"source": "7", "target": "65", "source_name": "nineteenth century", "target_name": "country music", "weight": 1.0, "year": 2012}, {"source": "7", "target": "67", "source_name": "nineteenth century", "target_name": "rock art", "weight": 1.0, "year": 2012}, {"source": "7", "target": "69", "source_name": "nineteenth century", "target_name": "classical music", "weight": 2.0, "year": 2012}, {"source": "7", "target": "70", "source_name": "nineteenth century", "target_name": "world war", "weight": 2.0, "year": 2012}, {"source": "7", "target": "74", "source_name": "nineteenth century", "target_name": "united states", "weight": 2.0, "year": 2012}, {"source": "7", "target": "77", "source_name": "nineteenth century", "target_name": "rock music", "weight": 3.0, "year": 2012}, {"source": "7", "target": "79", "source_name": "nineteenth century", "target_name": "popular culture", "weight": 1.0, "year": 2012}, {"source": "7", "target": "80", "source_name": "nineteenth century", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "7", "target": "85", "source_name": "nineteenth century", "target_name": "jewish music", "weight": 1.0, "year": 2012}, {"source": "7", "target": "89", "source_name": "nineteenth century", "target_name": "electronic music", "weight": 1.0, "year": 2012}, {"source": "8", "target": "20", "source_name": "christian rock", "target_name": "garage rock", "weight": 1.0, "year": 2012}, {"source": "8", "target": "36", "source_name": "christian rock", "target_name": "music industry", "weight": 1.0, "year": 2012}, {"source": "8", "target": "44", "source_name": "christian rock", "target_name": "alternative rock", "weight": 1.0, "year": 2012}, {"source": "8", "target": "53", "source_name": "christian rock", "target_name": "popular music", "weight": 2.0, "year": 2012}, {"source": "8", "target": "57", "source_name": "christian rock", "target_name": "north america", "weight": 1.0, "year": 2012}, {"source": "8", "target": "65", "source_name": "christian rock", "target_name": "country music", "weight": 1.0, "year": 2012}, {"source": "8", "target": "73", "source_name": "christian rock", "target_name": "southern rock", "weight": 1.0, "year": 2012}, {"source": "8", "target": "77", "source_name": "christian rock", "target_name": "rock music", "weight": 1.0, "year": 2012}, {"source": "8", "target": "79", "source_name": "christian rock", "target_name": "popular culture", "weight": 1.0, "year": 2012}, {"source": "8", "target": "80", "source_name": "christian rock", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "9", "target": "10", "source_name": "compact disc", "target_name": "african american", "weight": 1.0, "year": 2012}, {"source": "9", "target": "11", "source_name": "compact disc", "target_name": "south africa", "weight": 1.0, "year": 2012}, {"source": "9", "target": "18", "source_name": "compact disc", "target_name": "middle class", "weight": 1.0, "year": 2012}, {"source": "9", "target": "19", "source_name": "compact disc", "target_name": "music video", "weight": 1.0, "year": 2012}, {"source": "9", "target": "24", "source_name": "compact disc", "target_name": "punk rock", "weight": 1.0, "year": 2012}, {"source": "9", "target": "25", "source_name": "compact disc", "target_name": "russian rock", "weight": 1.0, "year": 2012}, {"source": "9", "target": "28", "source_name": "compact disc", "target_name": "high school", "weight": 1.0, "year": 2012}, {"source": "9", "target": "29", "source_name": "compact disc", "target_name": "rolling stone", "weight": 1.0, "year": 2012}, {"source": "9", "target": "30", "source_name": "compact disc", "target_name": "rock band", "weight": 1.0, "year": 2012}, {"source": "9", "target": "36", "source_name": "compact disc", "target_name": "music industry", "weight": 1.0, "year": 2012}, {"source": "9", "target": "37", "source_name": "compact disc", "target_name": "middle ages", "weight": 1.0, "year": 2012}, {"source": "9", "target": "46", "source_name": "compact disc", "target_name": "music festival", "weight": 1.0, "year": 2012}, {"source": "9", "target": "48", "source_name": "compact disc", "target_name": "pop music", "weight": 1.0, "year": 2012}, {"source": "9", "target": "53", "source_name": "compact disc", "target_name": "popular music", "weight": 4.0, "year": 2012}, {"source": "9", "target": "61", "source_name": "compact disc", "target_name": "progressive rock", "weight": 1.0, "year": 2012}, {"source": "9", "target": "66", "source_name": "compact disc", "target_name": "hong kong", "weight": 1.0, "year": 2012}, {"source": "9", "target": "74", "source_name": "compact disc", "target_name": "united states", "weight": 1.0, "year": 2012}, {"source": "9", "target": "77", "source_name": "compact disc", "target_name": "rock music", "weight": 2.0, "year": 2012}, {"source": "9", "target": "78", "source_name": "compact disc", "target_name": "hip hop", "weight": 1.0, "year": 2012}, {"source": "9", "target": "79", "source_name": "compact disc", "target_name": "popular culture", "weight": 1.0, "year": 2012}, {"source": "9", "target": "80", "source_name": "compact disc", "target_name": "folk music", "weight": 3.0, "year": 2012}, {"source": "9", "target": "85", "source_name": "compact disc", "target_name": "jewish music", "weight": 2.0, "year": 2012}, {"source": "9", "target": "89", "source_name": "compact disc", "target_name": "electronic music", "weight": 1.0, "year": 2012}, {"source": "10", "target": "15", "source_name": "african american", "target_name": "musical theatre", "weight": 1.0, "year": 2012}, {"source": "10", "target": "17", "source_name": "african american", "target_name": "civil rights", "weight": 1.0, "year": 2012}, {"source": "10", "target": "19", "source_name": "african american", "target_name": "music video", "weight": 1.0, "year": 2012}, {"source": "10", "target": "22", "source_name": "african american", "target_name": "chamber music", "weight": 1.0, "year": 2012}, {"source": "10", "target": "24", "source_name": "african american", "target_name": "punk rock", "weight": 2.0, "year": 2012}, {"source": "10", "target": "36", "source_name": "african american", "target_name": "music industry", "weight": 2.0, "year": 2012}, {"source": "10", "target": "38", "source_name": "african american", "target_name": "summary additional listening", "weight": 1.0, "year": 2012}, {"source": "10", "target": "40", "source_name": "african american", "target_name": "musical instruments", "weight": 1.0, "year": 2012}, {"source": "10", "target": "52", "source_name": "african american", "target_name": "folk song", "weight": 1.0, "year": 2012}, {"source": "10", "target": "53", "source_name": "african american", "target_name": "popular music", "weight": 5.0, "year": 2012}, {"source": "10", "target": "54", "source_name": "african american", "target_name": "american popular music", "weight": 1.0, "year": 2012}, {"source": "10", "target": "65", "source_name": "african american", "target_name": "country music", "weight": 1.0, "year": 2012}, {"source": "10", "target": "69", "source_name": "african american", "target_name": "classical music", "weight": 1.0, "year": 2012}, {"source": "10", "target": "74", "source_name": "african american", "target_name": "united states", "weight": 4.0, "year": 2012}, {"source": "10", "target": "75", "source_name": "african american", "target_name": "world war ii", "weight": 1.0, "year": 2012}, {"source": "10", "target": "77", "source_name": "african american", "target_name": "rock music", "weight": 2.0, "year": 2012}, {"source": "10", "target": "78", "source_name": "african american", "target_name": "hip hop", "weight": 1.0, "year": 2012}, {"source": "10", "target": "79", "source_name": "african american", "target_name": "popular culture", "weight": 2.0, "year": 2012}, {"source": "10", "target": "80", "source_name": "african american", "target_name": "folk music", "weight": 2.0, "year": 2012}, {"source": "10", "target": "89", "source_name": "african american", "target_name": "electronic music", "weight": 1.0, "year": 2012}, {"source": "11", "target": "21", "source_name": "south africa", "target_name": "social protest", "weight": 1.0, "year": 2012}, {"source": "11", "target": "23", "source_name": "south africa", "target_name": "electronic dance music", "weight": 1.0, "year": 2012}, {"source": "11", "target": "25", "source_name": "south africa", "target_name": "russian rock", "weight": 1.0, "year": 2012}, {"source": "11", "target": "36", "source_name": "south africa", "target_name": "music industry", "weight": 1.0, "year": 2012}, {"source": "11", "target": "46", "source_name": "south africa", "target_name": "music festival", "weight": 3.0, "year": 2012}, {"source": "11", "target": "53", "source_name": "south africa", "target_name": "popular music", "weight": 3.0, "year": 2012}, {"source": "11", "target": "66", "source_name": "south africa", "target_name": "hong kong", "weight": 1.0, "year": 2012}, {"source": "11", "target": "74", "source_name": "south africa", "target_name": "united states", "weight": 2.0, "year": 2012}, {"source": "11", "target": "78", "source_name": "south africa", "target_name": "hip hop", "weight": 1.0, "year": 2012}, {"source": "11", "target": "80", "source_name": "south africa", "target_name": "folk music", "weight": 2.0, "year": 2012}, {"source": "11", "target": "85", "source_name": "south africa", "target_name": "jewish music", "weight": 1.0, "year": 2012}, {"source": "11", "target": "87", "source_name": "south africa", "target_name": "music hall", "weight": 1.0, "year": 2012}, {"source": "11", "target": "88", "source_name": "south africa", "target_name": "oxford university press", "weight": 1.0, "year": 2012}, {"source": "12", "target": "15", "source_name": "rock opera", "target_name": "musical theatre", "weight": 3.0, "year": 2012}, {"source": "12", "target": "33", "source_name": "rock opera", "target_name": "jesus christ", "weight": 1.0, "year": 2012}, {"source": "12", "target": "41", "source_name": "rock opera", "target_name": "youth culture", "weight": 1.0, "year": 2012}, {"source": "12", "target": "53", "source_name": "rock opera", "target_name": "popular music", "weight": 1.0, "year": 2012}, {"source": "12", "target": "57", "source_name": "rock opera", "target_name": "north america", "weight": 1.0, "year": 2012}, {"source": "12", "target": "77", "source_name": "rock opera", "target_name": "rock music", "weight": 2.0, "year": 2012}, {"source": "12", "target": "79", "source_name": "rock opera", "target_name": "popular culture", "weight": 1.0, "year": 2012}, {"source": "15", "target": "33", "source_name": "musical theatre", "target_name": "jesus christ", "weight": 3.0, "year": 2012}, {"source": "15", "target": "53", "source_name": "musical theatre", "target_name": "popular music", "weight": 1.0, "year": 2012}, {"source": "15", "target": "70", "source_name": "musical theatre", "target_name": "world war", "weight": 1.0, "year": 2012}, {"source": "15", "target": "74", "source_name": "musical theatre", "target_name": "united states", "weight": 1.0, "year": 2012}, {"source": "15", "target": "77", "source_name": "musical theatre", "target_name": "rock music", "weight": 4.0, "year": 2012}, {"source": "15", "target": "87", "source_name": "musical theatre", "target_name": "music hall", "weight": 1.0, "year": 2012}, {"source": "16", "target": "29", "source_name": "bob dylan", "target_name": "rolling stone", "weight": 1.0, "year": 2012}, {"source": "16", "target": "30", "source_name": "bob dylan", "target_name": "rock band", "weight": 2.0, "year": 2012}, {"source": "16", "target": "36", "source_name": "bob dylan", "target_name": "music industry", "weight": 2.0, "year": 2012}, {"source": "16", "target": "42", "source_name": "bob dylan", "target_name": "simon frith", "weight": 1.0, "year": 2012}, {"source": "16", "target": "48", "source_name": "bob dylan", "target_name": "pop music", "weight": 2.0, "year": 2012}, {"source": "16", "target": "52", "source_name": "bob dylan", "target_name": "folk song", "weight": 1.0, "year": 2012}, {"source": "16", "target": "53", "source_name": "bob dylan", "target_name": "popular music", "weight": 9.0, "year": 2012}, {"source": "16", "target": "54", "source_name": "bob dylan", "target_name": "american popular music", "weight": 1.0, "year": 2012}, {"source": "16", "target": "69", "source_name": "bob dylan", "target_name": "classical music", "weight": 1.0, "year": 2012}, {"source": "16", "target": "70", "source_name": "bob dylan", "target_name": "world war", "weight": 1.0, "year": 2012}, {"source": "16", "target": "72", "source_name": "bob dylan", "target_name": "jimi hendrix", "weight": 2.0, "year": 2012}, {"source": "16", "target": "75", "source_name": "bob dylan", "target_name": "world war ii", "weight": 1.0, "year": 2012}, {"source": "16", "target": "77", "source_name": "bob dylan", "target_name": "rock music", "weight": 6.0, "year": 2012}, {"source": "16", "target": "80", "source_name": "bob dylan", "target_name": "folk music", "weight": 4.0, "year": 2012}, {"source": "17", "target": "30", "source_name": "civil rights", "target_name": "rock band", "weight": 1.0, "year": 2012}, {"source": "17", "target": "41", "source_name": "civil rights", "target_name": "youth culture", "weight": 1.0, "year": 2012}, {"source": "17", "target": "53", "source_name": "civil rights", "target_name": "popular music", "weight": 3.0, "year": 2012}, {"source": "17", "target": "54", "source_name": "civil rights", "target_name": "american popular music", "weight": 1.0, "year": 2012}, {"source": "17", "target": "70", "source_name": "civil rights", "target_name": "world war", "weight": 1.0, "year": 2012}, {"source": "17", "target": "73", "source_name": "civil rights", "target_name": "southern rock", "weight": 1.0, "year": 2012}, {"source": "17", "target": "74", "source_name": "civil rights", "target_name": "united states", "weight": 2.0, "year": 2012}, {"source": "17", "target": "75", "source_name": "civil rights", "target_name": "world war ii", "weight": 1.0, "year": 2012}, {"source": "17", "target": "77", "source_name": "civil rights", "target_name": "rock music", "weight": 3.0, "year": 2012}, {"source": "17", "target": "79", "source_name": "civil rights", "target_name": "popular culture", "weight": 1.0, "year": 2012}, {"source": "17", "target": "80", "source_name": "civil rights", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "18", "target": "19", "source_name": "middle class", "target_name": "music video", "weight": 1.0, "year": 2012}, {"source": "18", "target": "28", "source_name": "middle class", "target_name": "high school", "weight": 1.0, "year": 2012}, {"source": "18", "target": "30", "source_name": "middle class", "target_name": "rock band", "weight": 2.0, "year": 2012}, {"source": "18", "target": "53", "source_name": "middle class", "target_name": "popular music", "weight": 1.0, "year": 2012}, {"source": "18", "target": "61", "source_name": "middle class", "target_name": "progressive rock", "weight": 2.0, "year": 2012}, {"source": "18", "target": "77", "source_name": "middle class", "target_name": "rock music", "weight": 2.0, "year": 2012}, {"source": "19", "target": "22", "source_name": "music video", "target_name": "chamber music", "weight": 1.0, "year": 2012}, {"source": "19", "target": "28", "source_name": "music video", "target_name": "high school", "weight": 1.0, "year": 2012}, {"source": "19", "target": "30", "source_name": "music video", "target_name": "rock band", "weight": 3.0, "year": 2012}, {"source": "19", "target": "36", "source_name": "music video", "target_name": "music industry", "weight": 2.0, "year": 2012}, {"source": "19", "target": "38", "source_name": "music video", "target_name": "summary additional listening", "weight": 1.0, "year": 2012}, {"source": "19", "target": "40", "source_name": "music video", "target_name": "musical instruments", "weight": 1.0, "year": 2012}, {"source": "19", "target": "47", "source_name": "music video", "target_name": "hard rock", "weight": 1.0, "year": 2012}, {"source": "19", "target": "48", "source_name": "music video", "target_name": "pop music", "weight": 3.0, "year": 2012}, {"source": "19", "target": "49", "source_name": "music video", "target_name": "music theory", "weight": 1.0, "year": 2012}, {"source": "19", "target": "51", "source_name": "music video", "target_name": "cultural identity", "weight": 2.0, "year": 2012}, {"source": "19", "target": "52", "source_name": "music video", "target_name": "folk song", "weight": 1.0, "year": 2012}, {"source": "19", "target": "53", "source_name": "music video", "target_name": "popular music", "weight": 8.0, "year": 2012}, {"source": "19", "target": "54", "source_name": "music video", "target_name": "american popular music", "weight": 1.0, "year": 2012}, {"source": "19", "target": "61", "source_name": "music video", "target_name": "progressive rock", "weight": 1.0, "year": 2012}, {"source": "19", "target": "65", "source_name": "music video", "target_name": "country music", "weight": 4.0, "year": 2012}, {"source": "19", "target": "69", "source_name": "music video", "target_name": "classical music", "weight": 1.0, "year": 2012}, {"source": "19", "target": "72", "source_name": "music video", "target_name": "jimi hendrix", "weight": 1.0, "year": 2012}, {"source": "19", "target": "74", "source_name": "music video", "target_name": "united states", "weight": 2.0, "year": 2012}, {"source": "19", "target": "76", "source_name": "music video", "target_name": "los angeles", "weight": 1.0, "year": 2012}, {"source": "19", "target": "77", "source_name": "music video", "target_name": "rock music", "weight": 9.0, "year": 2012}, {"source": "19", "target": "78", "source_name": "music video", "target_name": "hip hop", "weight": 2.0, "year": 2012}, {"source": "19", "target": "80", "source_name": "music video", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "19", "target": "82", "source_name": "music video", "target_name": "heavy metal", "weight": 1.0, "year": 2012}, {"source": "19", "target": "89", "source_name": "music video", "target_name": "electronic music", "weight": 1.0, "year": 2012}, {"source": "19", "target": "90", "source_name": "music video", "target_name": "blues rock", "weight": 1.0, "year": 2012}, {"source": "20", "target": "24", "source_name": "garage rock", "target_name": "punk rock", "weight": 1.0, "year": 2012}, {"source": "20", "target": "27", "source_name": "garage rock", "target_name": "pop rock", "weight": 1.0, "year": 2012}, {"source": "20", "target": "29", "source_name": "garage rock", "target_name": "rolling stone", "weight": 1.0, "year": 2012}, {"source": "20", "target": "30", "source_name": "garage rock", "target_name": "rock band", "weight": 2.0, "year": 2012}, {"source": "20", "target": "43", "source_name": "garage rock", "target_name": "music education", "weight": 1.0, "year": 2012}, {"source": "20", "target": "44", "source_name": "garage rock", "target_name": "alternative rock", "weight": 2.0, "year": 2012}, {"source": "20", "target": "47", "source_name": "garage rock", "target_name": "hard rock", "weight": 1.0, "year": 2012}, {"source": "20", "target": "48", "source_name": "garage rock", "target_name": "pop music", "weight": 1.0, "year": 2012}, {"source": "20", "target": "53", "source_name": "garage rock", "target_name": "popular music", "weight": 3.0, "year": 2012}, {"source": "20", "target": "57", "source_name": "garage rock", "target_name": "north america", "weight": 1.0, "year": 2012}, {"source": "20", "target": "65", "source_name": "garage rock", "target_name": "country music", "weight": 1.0, "year": 2012}, {"source": "20", "target": "73", "source_name": "garage rock", "target_name": "southern rock", "weight": 1.0, "year": 2012}, {"source": "20", "target": "77", "source_name": "garage rock", "target_name": "rock music", "weight": 4.0, "year": 2012}, {"source": "20", "target": "80", "source_name": "garage rock", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "21", "target": "47", "source_name": "social protest", "target_name": "hard rock", "weight": 1.0, "year": 2012}, {"source": "21", "target": "48", "source_name": "social protest", "target_name": "pop music", "weight": 1.0, "year": 2012}, {"source": "21", "target": "53", "source_name": "social protest", "target_name": "popular music", "weight": 3.0, "year": 2012}, {"source": "21", "target": "57", "source_name": "social protest", "target_name": "north america", "weight": 2.0, "year": 2012}, {"source": "21", "target": "71", "source_name": "social protest", "target_name": "latin american", "weight": 1.0, "year": 2012}, {"source": "21", "target": "74", "source_name": "social protest", "target_name": "united states", "weight": 1.0, "year": 2012}, {"source": "21", "target": "77", "source_name": "social protest", "target_name": "rock music", "weight": 1.0, "year": 2012}, {"source": "21", "target": "80", "source_name": "social protest", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "21", "target": "82", "source_name": "social protest", "target_name": "heavy metal", "weight": 1.0, "year": 2012}, {"source": "21", "target": "87", "source_name": "social protest", "target_name": "music hall", "weight": 1.0, "year": 2012}, {"source": "22", "target": "35", "source_name": "chamber music", "target_name": "ancient greek", "weight": 1.0, "year": 2012}, {"source": "22", "target": "36", "source_name": "chamber music", "target_name": "music industry", "weight": 1.0, "year": 2012}, {"source": "22", "target": "38", "source_name": "chamber music", "target_name": "summary additional listening", "weight": 1.0, "year": 2012}, {"source": "22", "target": "40", "source_name": "chamber music", "target_name": "musical instruments", "weight": 1.0, "year": 2012}, {"source": "22", "target": "52", "source_name": "chamber music", "target_name": "folk song", "weight": 1.0, "year": 2012}, {"source": "22", "target": "53", "source_name": "chamber music", "target_name": "popular music", "weight": 1.0, "year": 2012}, {"source": "22", "target": "54", "source_name": "chamber music", "target_name": "american popular music", "weight": 1.0, "year": 2012}, {"source": "22", "target": "65", "source_name": "chamber music", "target_name": "country music", "weight": 2.0, "year": 2012}, {"source": "22", "target": "69", "source_name": "chamber music", "target_name": "classical music", "weight": 2.0, "year": 2012}, {"source": "22", "target": "74", "source_name": "chamber music", "target_name": "united states", "weight": 1.0, "year": 2012}, {"source": "22", "target": "77", "source_name": "chamber music", "target_name": "rock music", "weight": 1.0, "year": 2012}, {"source": "22", "target": "80", "source_name": "chamber music", "target_name": "folk music", "weight": 2.0, "year": 2012}, {"source": "22", "target": "89", "source_name": "chamber music", "target_name": "electronic music", "weight": 3.0, "year": 2012}, {"source": "23", "target": "36", "source_name": "electronic dance music", "target_name": "music industry", "weight": 2.0, "year": 2012}, {"source": "23", "target": "42", "source_name": "electronic dance music", "target_name": "simon frith", "weight": 2.0, "year": 2012}, {"source": "23", "target": "47", "source_name": "electronic dance music", "target_name": "hard rock", "weight": 1.0, "year": 2012}, {"source": "23", "target": "53", "source_name": "electronic dance music", "target_name": "popular music", "weight": 6.0, "year": 2012}, {"source": "23", "target": "56", "source_name": "electronic dance music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2012}, {"source": "23", "target": "60", "source_name": "electronic dance music", "target_name": "cultural studies", "weight": 2.0, "year": 2012}, {"source": "23", "target": "67", "source_name": "electronic dance music", "target_name": "rock art", "weight": 1.0, "year": 2012}, {"source": "23", "target": "74", "source_name": "electronic dance music", "target_name": "united states", "weight": 2.0, "year": 2012}, {"source": "23", "target": "76", "source_name": "electronic dance music", "target_name": "los angeles", "weight": 1.0, "year": 2012}, {"source": "23", "target": "77", "source_name": "electronic dance music", "target_name": "rock music", "weight": 1.0, "year": 2012}, {"source": "23", "target": "78", "source_name": "electronic dance music", "target_name": "hip hop", "weight": 1.0, "year": 2012}, {"source": "23", "target": "79", "source_name": "electronic dance music", "target_name": "popular culture", "weight": 1.0, "year": 2012}, {"source": "23", "target": "82", "source_name": "electronic dance music", "target_name": "heavy metal", "weight": 1.0, "year": 2012}, {"source": "23", "target": "88", "source_name": "electronic dance music", "target_name": "oxford university press", "weight": 1.0, "year": 2012}, {"source": "23", "target": "89", "source_name": "electronic dance music", "target_name": "electronic music", "weight": 3.0, "year": 2012}, {"source": "24", "target": "27", "source_name": "punk rock", "target_name": "pop rock", "weight": 1.0, "year": 2012}, {"source": "24", "target": "30", "source_name": "punk rock", "target_name": "rock band", "weight": 1.0, "year": 2012}, {"source": "24", "target": "36", "source_name": "punk rock", "target_name": "music industry", "weight": 1.0, "year": 2012}, {"source": "24", "target": "41", "source_name": "punk rock", "target_name": "youth culture", "weight": 1.0, "year": 2012}, {"source": "24", "target": "42", "source_name": "punk rock", "target_name": "simon frith", "weight": 1.0, "year": 2012}, {"source": "24", "target": "44", "source_name": "punk rock", "target_name": "alternative rock", "weight": 3.0, "year": 2012}, {"source": "24", "target": "47", "source_name": "punk rock", "target_name": "hard rock", "weight": 4.0, "year": 2012}, {"source": "24", "target": "48", "source_name": "punk rock", "target_name": "pop music", "weight": 4.0, "year": 2012}, {"source": "24", "target": "53", "source_name": "punk rock", "target_name": "popular music", "weight": 8.0, "year": 2012}, {"source": "24", "target": "61", "source_name": "punk rock", "target_name": "progressive rock", "weight": 1.0, "year": 2012}, {"source": "24", "target": "65", "source_name": "punk rock", "target_name": "country music", "weight": 1.0, "year": 2012}, {"source": "24", "target": "69", "source_name": "punk rock", "target_name": "classical music", "weight": 1.0, "year": 2012}, {"source": "24", "target": "74", "source_name": "punk rock", "target_name": "united states", "weight": 3.0, "year": 2012}, {"source": "24", "target": "77", "source_name": "punk rock", "target_name": "rock music", "weight": 9.0, "year": 2012}, {"source": "24", "target": "78", "source_name": "punk rock", "target_name": "hip hop", "weight": 1.0, "year": 2012}, {"source": "24", "target": "79", "source_name": "punk rock", "target_name": "popular culture", "weight": 1.0, "year": 2012}, {"source": "24", "target": "80", "source_name": "punk rock", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "24", "target": "82", "source_name": "punk rock", "target_name": "heavy metal", "weight": 3.0, "year": 2012}, {"source": "25", "target": "46", "source_name": "russian rock", "target_name": "music festival", "weight": 1.0, "year": 2012}, {"source": "25", "target": "53", "source_name": "russian rock", "target_name": "popular music", "weight": 2.0, "year": 2012}, {"source": "25", "target": "66", "source_name": "russian rock", "target_name": "hong kong", "weight": 1.0, "year": 2012}, {"source": "25", "target": "77", "source_name": "russian rock", "target_name": "rock music", "weight": 1.0, "year": 2012}, {"source": "25", "target": "78", "source_name": "russian rock", "target_name": "hip hop", "weight": 1.0, "year": 2012}, {"source": "25", "target": "80", "source_name": "russian rock", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "25", "target": "85", "source_name": "russian rock", "target_name": "jewish music", "weight": 1.0, "year": 2012}, {"source": "27", "target": "44", "source_name": "pop rock", "target_name": "alternative rock", "weight": 1.0, "year": 2012}, {"source": "27", "target": "47", "source_name": "pop rock", "target_name": "hard rock", "weight": 1.0, "year": 2012}, {"source": "27", "target": "48", "source_name": "pop rock", "target_name": "pop music", "weight": 1.0, "year": 2012}, {"source": "27", "target": "53", "source_name": "pop rock", "target_name": "popular music", "weight": 1.0, "year": 2012}, {"source": "27", "target": "64", "source_name": "pop rock", "target_name": "english language", "weight": 1.0, "year": 2012}, {"source": "27", "target": "65", "source_name": "pop rock", "target_name": "country music", "weight": 1.0, "year": 2012}, {"source": "27", "target": "66", "source_name": "pop rock", "target_name": "hong kong", "weight": 1.0, "year": 2012}, {"source": "27", "target": "67", "source_name": "pop rock", "target_name": "rock art", "weight": 1.0, "year": 2012}, {"source": "27", "target": "77", "source_name": "pop rock", "target_name": "rock music", "weight": 1.0, "year": 2012}, {"source": "27", "target": "83", "source_name": "pop rock", "target_name": "folk rock", "weight": 1.0, "year": 2012}, {"source": "28", "target": "30", "source_name": "high school", "target_name": "rock band", "weight": 1.0, "year": 2012}, {"source": "28", "target": "37", "source_name": "high school", "target_name": "middle ages", "weight": 1.0, "year": 2012}, {"source": "28", "target": "48", "source_name": "high school", "target_name": "pop music", "weight": 1.0, "year": 2012}, {"source": "28", "target": "61", "source_name": "high school", "target_name": "progressive rock", "weight": 1.0, "year": 2012}, {"source": "28", "target": "77", "source_name": "high school", "target_name": "rock music", "weight": 3.0, "year": 2012}, {"source": "28", "target": "82", "source_name": "high school", "target_name": "heavy metal", "weight": 1.0, "year": 2012}, {"source": "29", "target": "36", "source_name": "rolling stone", "target_name": "music industry", "weight": 1.0, "year": 2012}, {"source": "29", "target": "42", "source_name": "rolling stone", "target_name": "simon frith", "weight": 1.0, "year": 2012}, {"source": "29", "target": "48", "source_name": "rolling stone", "target_name": "pop music", "weight": 3.0, "year": 2012}, {"source": "29", "target": "53", "source_name": "rolling stone", "target_name": "popular music", "weight": 6.0, "year": 2012}, {"source": "29", "target": "55", "source_name": "rolling stone", "target_name": "rock criticism", "weight": 4.0, "year": 2012}, {"source": "29", "target": "56", "source_name": "rolling stone", "target_name": "bruce springsteen", "weight": 1.0, "year": 2012}, {"source": "29", "target": "62", "source_name": "rolling stone", "target_name": "led zeppelin", "weight": 1.0, "year": 2012}, {"source": "29", "target": "72", "source_name": "rolling stone", "target_name": "jimi hendrix", "weight": 2.0, "year": 2012}, {"source": "29", "target": "74", "source_name": "rolling stone", "target_name": "united states", "weight": 1.0, "year": 2012}, {"source": "29", "target": "77", "source_name": "rolling stone", "target_name": "rock music", "weight": 8.0, "year": 2012}, {"source": "29", "target": "87", "source_name": "rolling stone", "target_name": "music hall", "weight": 1.0, "year": 2012}, {"source": "30", "target": "36", "source_name": "rock band", "target_name": "music industry", "weight": 1.0, "year": 2012}, {"source": "30", "target": "37", "source_name": "rock band", "target_name": "middle ages", "weight": 1.0, "year": 2012}, {"source": "30", "target": "41", "source_name": "rock band", "target_name": "youth culture", "weight": 1.0, "year": 2012}, {"source": "30", "target": "43", "source_name": "rock band", "target_name": "music education", "weight": 2.0, "year": 2012}, {"source": "30", "target": "44", "source_name": "rock band", "target_name": "alternative rock", "weight": 1.0, "year": 2012}, {"source": "30", "target": "47", "source_name": "rock band", "target_name": "hard rock", "weight": 1.0, "year": 2012}, {"source": "30", "target": "48", "source_name": "rock band", "target_name": "pop music", "weight": 1.0, "year": 2012}, {"source": "30", "target": "52", "source_name": "rock band", "target_name": "folk song", "weight": 2.0, "year": 2012}, {"source": "30", "target": "53", "source_name": "rock band", "target_name": "popular music", "weight": 18.0, "year": 2012}, {"source": "30", "target": "54", "source_name": "rock band", "target_name": "american popular music", "weight": 1.0, "year": 2012}, {"source": "30", "target": "61", "source_name": "rock band", "target_name": "progressive rock", "weight": 9.0, "year": 2012}, {"source": "30", "target": "65", "source_name": "rock band", "target_name": "country music", "weight": 1.0, "year": 2012}, {"source": "30", "target": "69", "source_name": "rock band", "target_name": "classical music", "weight": 2.0, "year": 2012}, {"source": "30", "target": "72", "source_name": "rock band", "target_name": "jimi hendrix", "weight": 1.0, "year": 2012}, {"source": "30", "target": "73", "source_name": "rock band", "target_name": "southern rock", "weight": 2.0, "year": 2012}, {"source": "30", "target": "74", "source_name": "rock band", "target_name": "united states", "weight": 2.0, "year": 2012}, {"source": "30", "target": "76", "source_name": "rock band", "target_name": "los angeles", "weight": 1.0, "year": 2012}, {"source": "30", "target": "77", "source_name": "rock band", "target_name": "rock music", "weight": 25.0, "year": 2012}, {"source": "30", "target": "79", "source_name": "rock band", "target_name": "popular culture", "weight": 1.0, "year": 2012}, {"source": "30", "target": "80", "source_name": "rock band", "target_name": "folk music", "weight": 2.0, "year": 2012}, {"source": "30", "target": "82", "source_name": "rock band", "target_name": "heavy metal", "weight": 1.0, "year": 2012}, {"source": "32", "target": "43", "source_name": "higher education", "target_name": "music education", "weight": 1.0, "year": 2012}, {"source": "33", "target": "53", "source_name": "jesus christ", "target_name": "popular music", "weight": 1.0, "year": 2012}, {"source": "33", "target": "70", "source_name": "jesus christ", "target_name": "world war", "weight": 1.0, "year": 2012}, {"source": "33", "target": "77", "source_name": "jesus christ", "target_name": "rock music", "weight": 4.0, "year": 2012}, {"source": "34", "target": "36", "source_name": "mass media", "target_name": "music industry", "weight": 1.0, "year": 2012}, {"source": "34", "target": "40", "source_name": "mass media", "target_name": "musical instruments", "weight": 1.0, "year": 2012}, {"source": "34", "target": "41", "source_name": "mass media", "target_name": "youth culture", "weight": 1.0, "year": 2012}, {"source": "34", "target": "43", "source_name": "mass media", "target_name": "music education", "weight": 2.0, "year": 2012}, {"source": "34", "target": "46", "source_name": "mass media", "target_name": "music festival", "weight": 1.0, "year": 2012}, {"source": "34", "target": "48", "source_name": "mass media", "target_name": "pop music", "weight": 2.0, "year": 2012}, {"source": "34", "target": "51", "source_name": "mass media", "target_name": "cultural identity", "weight": 1.0, "year": 2012}, {"source": "34", "target": "52", "source_name": "mass media", "target_name": "folk song", "weight": 2.0, "year": 2012}, {"source": "34", "target": "53", "source_name": "mass media", "target_name": "popular music", "weight": 6.0, "year": 2012}, {"source": "34", "target": "65", "source_name": "mass media", "target_name": "country music", "weight": 1.0, "year": 2012}, {"source": "34", "target": "66", "source_name": "mass media", "target_name": "hong kong", "weight": 1.0, "year": 2012}, {"source": "34", "target": "67", "source_name": "mass media", "target_name": "rock art", "weight": 1.0, "year": 2012}, {"source": "34", "target": "69", "source_name": "mass media", "target_name": "classical music", "weight": 1.0, "year": 2012}, {"source": "34", "target": "77", "source_name": "mass media", "target_name": "rock music", "weight": 4.0, "year": 2012}, {"source": "34", "target": "79", "source_name": "mass media", "target_name": "popular culture", "weight": 1.0, "year": 2012}, {"source": "35", "target": "43", "source_name": "ancient greek", "target_name": "music education", "weight": 1.0, "year": 2012}, {"source": "35", "target": "65", "source_name": "ancient greek", "target_name": "country music", "weight": 1.0, "year": 2012}, {"source": "35", "target": "77", "source_name": "ancient greek", "target_name": "rock music", "weight": 1.0, "year": 2012}, {"source": "35", "target": "80", "source_name": "ancient greek", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "35", "target": "89", "source_name": "ancient greek", "target_name": "electronic music", "weight": 1.0, "year": 2012}, {"source": "36", "target": "38", "source_name": "music industry", "target_name": "summary additional listening", "weight": 1.0, "year": 2012}, {"source": "36", "target": "40", "source_name": "music industry", "target_name": "musical instruments", "weight": 1.0, "year": 2012}, {"source": "36", "target": "41", "source_name": "music industry", "target_name": "youth culture", "weight": 2.0, "year": 2012}, {"source": "36", "target": "42", "source_name": "music industry", "target_name": "simon frith", "weight": 2.0, "year": 2012}, {"source": "36", "target": "43", "source_name": "music industry", "target_name": "music education", "weight": 2.0, "year": 2012}, {"source": "36", "target": "46", "source_name": "music industry", "target_name": "music festival", "weight": 1.0, "year": 2012}, {"source": "36", "target": "47", "source_name": "music industry", "target_name": "hard rock", "weight": 3.0, "year": 2012}, {"source": "36", "target": "48", "source_name": "music industry", "target_name": "pop music", "weight": 9.0, "year": 2012}, {"source": "36", "target": "49", "source_name": "music industry", "target_name": "music theory", "weight": 1.0, "year": 2012}, {"source": "36", "target": "50", "source_name": "music industry", "target_name": "hollywood film", "weight": 1.0, "year": 2012}, {"source": "36", "target": "51", "source_name": "music industry", "target_name": "cultural identity", "weight": 1.0, "year": 2012}, {"source": "36", "target": "52", "source_name": "music industry", "target_name": "folk song", "weight": 1.0, "year": 2012}, {"source": "36", "target": "53", "source_name": "music industry", "target_name": "popular music", "weight": 28.0, "year": 2012}, {"source": "36", "target": "54", "source_name": "music industry", "target_name": "american popular music", "weight": 3.0, "year": 2012}, {"source": "36", "target": "55", "source_name": "music industry", "target_name": "rock criticism", "weight": 3.0, "year": 2012}, {"source": "36", "target": "56", "source_name": "music industry", "target_name": "bruce springsteen", "weight": 2.0, "year": 2012}, {"source": "36", "target": "60", "source_name": "music industry", "target_name": "cultural studies", "weight": 1.0, "year": 2012}, {"source": "36", "target": "61", "source_name": "music industry", "target_name": "progressive rock", "weight": 1.0, "year": 2012}, {"source": "36", "target": "62", "source_name": "music industry", "target_name": "led zeppelin", "weight": 1.0, "year": 2012}, {"source": "36", "target": "65", "source_name": "music industry", "target_name": "country music", "weight": 2.0, "year": 2012}, {"source": "36", "target": "66", "source_name": "music industry", "target_name": "hong kong", "weight": 1.0, "year": 2012}, {"source": "36", "target": "67", "source_name": "music industry", "target_name": "rock art", "weight": 1.0, "year": 2012}, {"source": "36", "target": "68", "source_name": "music industry", "target_name": "hearing loss", "weight": 1.0, "year": 2012}, {"source": "36", "target": "69", "source_name": "music industry", "target_name": "classical music", "weight": 5.0, "year": 2012}, {"source": "36", "target": "70", "source_name": "music industry", "target_name": "world war", "weight": 2.0, "year": 2012}, {"source": "36", "target": "72", "source_name": "music industry", "target_name": "jimi hendrix", "weight": 3.0, "year": 2012}, {"source": "36", "target": "74", "source_name": "music industry", "target_name": "united states", "weight": 4.0, "year": 2012}, {"source": "36", "target": "75", "source_name": "music industry", "target_name": "world war ii", "weight": 3.0, "year": 2012}, {"source": "36", "target": "76", "source_name": "music industry", "target_name": "los angeles", "weight": 2.0, "year": 2012}, {"source": "36", "target": "77", "source_name": "music industry", "target_name": "rock music", "weight": 16.0, "year": 2012}, {"source": "36", "target": "78", "source_name": "music industry", "target_name": "hip hop", "weight": 5.0, "year": 2012}, {"source": "36", "target": "79", "source_name": "music industry", "target_name": "popular culture", "weight": 4.0, "year": 2012}, {"source": "36", "target": "80", "source_name": "music industry", "target_name": "folk music", "weight": 3.0, "year": 2012}, {"source": "36", "target": "82", "source_name": "music industry", "target_name": "heavy metal", "weight": 2.0, "year": 2012}, {"source": "36", "target": "83", "source_name": "music industry", "target_name": "folk rock", "weight": 1.0, "year": 2012}, {"source": "36", "target": "88", "source_name": "music industry", "target_name": "oxford university press", "weight": 2.0, "year": 2012}, {"source": "36", "target": "89", "source_name": "music industry", "target_name": "electronic music", "weight": 2.0, "year": 2012}, {"source": "37", "target": "44", "source_name": "middle ages", "target_name": "alternative rock", "weight": 1.0, "year": 2012}, {"source": "37", "target": "58", "source_name": "middle ages", "target_name": "music therapy", "weight": 1.0, "year": 2012}, {"source": "37", "target": "61", "source_name": "middle ages", "target_name": "progressive rock", "weight": 1.0, "year": 2012}, {"source": "37", "target": "69", "source_name": "middle ages", "target_name": "classical music", "weight": 1.0, "year": 2012}, {"source": "37", "target": "77", "source_name": "middle ages", "target_name": "rock music", "weight": 2.0, "year": 2012}, {"source": "37", "target": "80", "source_name": "middle ages", "target_name": "folk music", "weight": 2.0, "year": 2012}, {"source": "38", "target": "40", "source_name": "summary additional listening", "target_name": "musical instruments", "weight": 1.0, "year": 2012}, {"source": "38", "target": "52", "source_name": "summary additional listening", "target_name": "folk song", "weight": 1.0, "year": 2012}, {"source": "38", "target": "53", "source_name": "summary additional listening", "target_name": "popular music", "weight": 1.0, "year": 2012}, {"source": "38", "target": "54", "source_name": "summary additional listening", "target_name": "american popular music", "weight": 1.0, "year": 2012}, {"source": "38", "target": "65", "source_name": "summary additional listening", "target_name": "country music", "weight": 1.0, "year": 2012}, {"source": "38", "target": "69", "source_name": "summary additional listening", "target_name": "classical music", "weight": 1.0, "year": 2012}, {"source": "38", "target": "74", "source_name": "summary additional listening", "target_name": "united states", "weight": 1.0, "year": 2012}, {"source": "38", "target": "80", "source_name": "summary additional listening", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "38", "target": "89", "source_name": "summary additional listening", "target_name": "electronic music", "weight": 1.0, "year": 2012}, {"source": "40", "target": "43", "source_name": "musical instruments", "target_name": "music education", "weight": 1.0, "year": 2012}, {"source": "40", "target": "49", "source_name": "musical instruments", "target_name": "music theory", "weight": 1.0, "year": 2012}, {"source": "40", "target": "52", "source_name": "musical instruments", "target_name": "folk song", "weight": 1.0, "year": 2012}, {"source": "40", "target": "53", "source_name": "musical instruments", "target_name": "popular music", "weight": 2.0, "year": 2012}, {"source": "40", "target": "54", "source_name": "musical instruments", "target_name": "american popular music", "weight": 2.0, "year": 2012}, {"source": "40", "target": "65", "source_name": "musical instruments", "target_name": "country music", "weight": 1.0, "year": 2012}, {"source": "40", "target": "69", "source_name": "musical instruments", "target_name": "classical music", "weight": 1.0, "year": 2012}, {"source": "40", "target": "70", "source_name": "musical instruments", "target_name": "world war", "weight": 1.0, "year": 2012}, {"source": "40", "target": "74", "source_name": "musical instruments", "target_name": "united states", "weight": 2.0, "year": 2012}, {"source": "40", "target": "75", "source_name": "musical instruments", "target_name": "world war ii", "weight": 1.0, "year": 2012}, {"source": "40", "target": "80", "source_name": "musical instruments", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "40", "target": "89", "source_name": "musical instruments", "target_name": "electronic music", "weight": 2.0, "year": 2012}, {"source": "41", "target": "47", "source_name": "youth culture", "target_name": "hard rock", "weight": 1.0, "year": 2012}, {"source": "41", "target": "48", "source_name": "youth culture", "target_name": "pop music", "weight": 4.0, "year": 2012}, {"source": "41", "target": "51", "source_name": "youth culture", "target_name": "cultural identity", "weight": 2.0, "year": 2012}, {"source": "41", "target": "53", "source_name": "youth culture", "target_name": "popular music", "weight": 4.0, "year": 2012}, {"source": "41", "target": "60", "source_name": "youth culture", "target_name": "cultural studies", "weight": 2.0, "year": 2012}, {"source": "41", "target": "61", "source_name": "youth culture", "target_name": "progressive rock", "weight": 1.0, "year": 2012}, {"source": "41", "target": "66", "source_name": "youth culture", "target_name": "hong kong", "weight": 1.0, "year": 2012}, {"source": "41", "target": "74", "source_name": "youth culture", "target_name": "united states", "weight": 2.0, "year": 2012}, {"source": "41", "target": "75", "source_name": "youth culture", "target_name": "world war ii", "weight": 1.0, "year": 2012}, {"source": "41", "target": "77", "source_name": "youth culture", "target_name": "rock music", "weight": 7.0, "year": 2012}, {"source": "41", "target": "80", "source_name": "youth culture", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "42", "target": "47", "source_name": "simon frith", "target_name": "hard rock", "weight": 1.0, "year": 2012}, {"source": "42", "target": "48", "source_name": "simon frith", "target_name": "pop music", "weight": 6.0, "year": 2012}, {"source": "42", "target": "49", "source_name": "simon frith", "target_name": "music theory", "weight": 1.0, "year": 2012}, {"source": "42", "target": "51", "source_name": "simon frith", "target_name": "cultural identity", "weight": 1.0, "year": 2012}, {"source": "42", "target": "53", "source_name": "simon frith", "target_name": "popular music", "weight": 6.0, "year": 2012}, {"source": "42", "target": "55", "source_name": "simon frith", "target_name": "rock criticism", "weight": 2.0, "year": 2012}, {"source": "42", "target": "56", "source_name": "simon frith", "target_name": "bruce springsteen", "weight": 1.0, "year": 2012}, {"source": "42", "target": "57", "source_name": "simon frith", "target_name": "north america", "weight": 1.0, "year": 2012}, {"source": "42", "target": "60", "source_name": "simon frith", "target_name": "cultural studies", "weight": 3.0, "year": 2012}, {"source": "42", "target": "61", "source_name": "simon frith", "target_name": "progressive rock", "weight": 1.0, "year": 2012}, {"source": "42", "target": "65", "source_name": "simon frith", "target_name": "country music", "weight": 1.0, "year": 2012}, {"source": "42", "target": "72", "source_name": "simon frith", "target_name": "jimi hendrix", "weight": 1.0, "year": 2012}, {"source": "42", "target": "76", "source_name": "simon frith", "target_name": "los angeles", "weight": 1.0, "year": 2012}, {"source": "42", "target": "77", "source_name": "simon frith", "target_name": "rock music", "weight": 5.0, "year": 2012}, {"source": "42", "target": "78", "source_name": "simon frith", "target_name": "hip hop", "weight": 1.0, "year": 2012}, {"source": "42", "target": "79", "source_name": "simon frith", "target_name": "popular culture", "weight": 2.0, "year": 2012}, {"source": "42", "target": "82", "source_name": "simon frith", "target_name": "heavy metal", "weight": 1.0, "year": 2012}, {"source": "42", "target": "88", "source_name": "simon frith", "target_name": "oxford university press", "weight": 1.0, "year": 2012}, {"source": "43", "target": "48", "source_name": "music education", "target_name": "pop music", "weight": 2.0, "year": 2012}, {"source": "43", "target": "49", "source_name": "music education", "target_name": "music theory", "weight": 3.0, "year": 2012}, {"source": "43", "target": "52", "source_name": "music education", "target_name": "folk song", "weight": 1.0, "year": 2012}, {"source": "43", "target": "53", "source_name": "music education", "target_name": "popular music", "weight": 6.0, "year": 2012}, {"source": "43", "target": "57", "source_name": "music education", "target_name": "north america", "weight": 1.0, "year": 2012}, {"source": "43", "target": "60", "source_name": "music education", "target_name": "cultural studies", "weight": 1.0, "year": 2012}, {"source": "43", "target": "66", "source_name": "music education", "target_name": "hong kong", "weight": 1.0, "year": 2012}, {"source": "43", "target": "69", "source_name": "music education", "target_name": "classical music", "weight": 3.0, "year": 2012}, {"source": "43", "target": "74", "source_name": "music education", "target_name": "united states", "weight": 1.0, "year": 2012}, {"source": "43", "target": "77", "source_name": "music education", "target_name": "rock music", "weight": 4.0, "year": 2012}, {"source": "43", "target": "80", "source_name": "music education", "target_name": "folk music", "weight": 5.0, "year": 2012}, {"source": "43", "target": "82", "source_name": "music education", "target_name": "heavy metal", "weight": 1.0, "year": 2012}, {"source": "44", "target": "47", "source_name": "alternative rock", "target_name": "hard rock", "weight": 1.0, "year": 2012}, {"source": "44", "target": "48", "source_name": "alternative rock", "target_name": "pop music", "weight": 1.0, "year": 2012}, {"source": "44", "target": "53", "source_name": "alternative rock", "target_name": "popular music", "weight": 8.0, "year": 2012}, {"source": "44", "target": "57", "source_name": "alternative rock", "target_name": "north america", "weight": 3.0, "year": 2012}, {"source": "44", "target": "61", "source_name": "alternative rock", "target_name": "progressive rock", "weight": 1.0, "year": 2012}, {"source": "44", "target": "65", "source_name": "alternative rock", "target_name": "country music", "weight": 2.0, "year": 2012}, {"source": "44", "target": "67", "source_name": "alternative rock", "target_name": "rock art", "weight": 1.0, "year": 2012}, {"source": "44", "target": "73", "source_name": "alternative rock", "target_name": "southern rock", "weight": 1.0, "year": 2012}, {"source": "44", "target": "74", "source_name": "alternative rock", "target_name": "united states", "weight": 2.0, "year": 2012}, {"source": "44", "target": "77", "source_name": "alternative rock", "target_name": "rock music", "weight": 6.0, "year": 2012}, {"source": "44", "target": "78", "source_name": "alternative rock", "target_name": "hip hop", "weight": 1.0, "year": 2012}, {"source": "44", "target": "80", "source_name": "alternative rock", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "45", "target": "77", "source_name": "double bass", "target_name": "rock music", "weight": 2.0, "year": 2012}, {"source": "46", "target": "48", "source_name": "music festival", "target_name": "pop music", "weight": 2.0, "year": 2012}, {"source": "46", "target": "53", "source_name": "music festival", "target_name": "popular music", "weight": 2.0, "year": 2012}, {"source": "46", "target": "66", "source_name": "music festival", "target_name": "hong kong", "weight": 1.0, "year": 2012}, {"source": "46", "target": "69", "source_name": "music festival", "target_name": "classical music", "weight": 3.0, "year": 2012}, {"source": "46", "target": "77", "source_name": "music festival", "target_name": "rock music", "weight": 3.0, "year": 2012}, {"source": "46", "target": "78", "source_name": "music festival", "target_name": "hip hop", "weight": 1.0, "year": 2012}, {"source": "46", "target": "80", "source_name": "music festival", "target_name": "folk music", "weight": 2.0, "year": 2012}, {"source": "46", "target": "85", "source_name": "music festival", "target_name": "jewish music", "weight": 1.0, "year": 2012}, {"source": "47", "target": "48", "source_name": "hard rock", "target_name": "pop music", "weight": 2.0, "year": 2012}, {"source": "47", "target": "53", "source_name": "hard rock", "target_name": "popular music", "weight": 5.0, "year": 2012}, {"source": "47", "target": "56", "source_name": "hard rock", "target_name": "bruce springsteen", "weight": 1.0, "year": 2012}, {"source": "47", "target": "57", "source_name": "hard rock", "target_name": "north america", "weight": 1.0, "year": 2012}, {"source": "47", "target": "61", "source_name": "hard rock", "target_name": "progressive rock", "weight": 2.0, "year": 2012}, {"source": "47", "target": "65", "source_name": "hard rock", "target_name": "country music", "weight": 1.0, "year": 2012}, {"source": "47", "target": "69", "source_name": "hard rock", "target_name": "classical music", "weight": 2.0, "year": 2012}, {"source": "47", "target": "74", "source_name": "hard rock", "target_name": "united states", "weight": 1.0, "year": 2012}, {"source": "47", "target": "77", "source_name": "hard rock", "target_name": "rock music", "weight": 11.0, "year": 2012}, {"source": "47", "target": "78", "source_name": "hard rock", "target_name": "hip hop", "weight": 1.0, "year": 2012}, {"source": "47", "target": "79", "source_name": "hard rock", "target_name": "popular culture", "weight": 2.0, "year": 2012}, {"source": "47", "target": "82", "source_name": "hard rock", "target_name": "heavy metal", "weight": 5.0, "year": 2012}, {"source": "47", "target": "83", "source_name": "hard rock", "target_name": "folk rock", "weight": 1.0, "year": 2012}, {"source": "47", "target": "89", "source_name": "hard rock", "target_name": "electronic music", "weight": 1.0, "year": 2012}, {"source": "48", "target": "49", "source_name": "pop music", "target_name": "music theory", "weight": 1.0, "year": 2012}, {"source": "48", "target": "51", "source_name": "pop music", "target_name": "cultural identity", "weight": 3.0, "year": 2012}, {"source": "48", "target": "52", "source_name": "pop music", "target_name": "folk song", "weight": 2.0, "year": 2012}, {"source": "48", "target": "53", "source_name": "pop music", "target_name": "popular music", "weight": 32.0, "year": 2012}, {"source": "48", "target": "55", "source_name": "pop music", "target_name": "rock criticism", "weight": 2.0, "year": 2012}, {"source": "48", "target": "57", "source_name": "pop music", "target_name": "north america", "weight": 2.0, "year": 2012}, {"source": "48", "target": "59", "source_name": "pop music", "target_name": "college students", "weight": 3.0, "year": 2012}, {"source": "48", "target": "60", "source_name": "pop music", "target_name": "cultural studies", "weight": 1.0, "year": 2012}, {"source": "48", "target": "62", "source_name": "pop music", "target_name": "led zeppelin", "weight": 1.0, "year": 2012}, {"source": "48", "target": "64", "source_name": "pop music", "target_name": "english language", "weight": 2.0, "year": 2012}, {"source": "48", "target": "65", "source_name": "pop music", "target_name": "country music", "weight": 2.0, "year": 2012}, {"source": "48", "target": "66", "source_name": "pop music", "target_name": "hong kong", "weight": 4.0, "year": 2012}, {"source": "48", "target": "67", "source_name": "pop music", "target_name": "rock art", "weight": 3.0, "year": 2012}, {"source": "48", "target": "69", "source_name": "pop music", "target_name": "classical music", "weight": 6.0, "year": 2012}, {"source": "48", "target": "70", "source_name": "pop music", "target_name": "world war", "weight": 2.0, "year": 2012}, {"source": "48", "target": "71", "source_name": "pop music", "target_name": "latin american", "weight": 1.0, "year": 2012}, {"source": "48", "target": "72", "source_name": "pop music", "target_name": "jimi hendrix", "weight": 3.0, "year": 2012}, {"source": "48", "target": "74", "source_name": "pop music", "target_name": "united states", "weight": 4.0, "year": 2012}, {"source": "48", "target": "76", "source_name": "pop music", "target_name": "los angeles", "weight": 1.0, "year": 2012}, {"source": "48", "target": "77", "source_name": "pop music", "target_name": "rock music", "weight": 31.0, "year": 2012}, {"source": "48", "target": "78", "source_name": "pop music", "target_name": "hip hop", "weight": 2.0, "year": 2012}, {"source": "48", "target": "79", "source_name": "pop music", "target_name": "popular culture", "weight": 3.0, "year": 2012}, {"source": "48", "target": "80", "source_name": "pop music", "target_name": "folk music", "weight": 4.0, "year": 2012}, {"source": "48", "target": "82", "source_name": "pop music", "target_name": "heavy metal", "weight": 2.0, "year": 2012}, {"source": "48", "target": "83", "source_name": "pop music", "target_name": "folk rock", "weight": 2.0, "year": 2012}, {"source": "49", "target": "53", "source_name": "music theory", "target_name": "popular music", "weight": 4.0, "year": 2012}, {"source": "49", "target": "54", "source_name": "music theory", "target_name": "american popular music", "weight": 1.0, "year": 2012}, {"source": "49", "target": "55", "source_name": "music theory", "target_name": "rock criticism", "weight": 1.0, "year": 2012}, {"source": "49", "target": "57", "source_name": "music theory", "target_name": "north america", "weight": 2.0, "year": 2012}, {"source": "49", "target": "61", "source_name": "music theory", "target_name": "progressive rock", "weight": 1.0, "year": 2012}, {"source": "49", "target": "69", "source_name": "music theory", "target_name": "classical music", "weight": 1.0, "year": 2012}, {"source": "49", "target": "72", "source_name": "music theory", "target_name": "jimi hendrix", "weight": 1.0, "year": 2012}, {"source": "49", "target": "77", "source_name": "music theory", "target_name": "rock music", "weight": 3.0, "year": 2012}, {"source": "49", "target": "78", "source_name": "music theory", "target_name": "hip hop", "weight": 1.0, "year": 2012}, {"source": "49", "target": "88", "source_name": "music theory", "target_name": "oxford university press", "weight": 2.0, "year": 2012}, {"source": "49", "target": "89", "source_name": "music theory", "target_name": "electronic music", "weight": 1.0, "year": 2012}, {"source": "50", "target": "53", "source_name": "hollywood film", "target_name": "popular music", "weight": 1.0, "year": 2012}, {"source": "50", "target": "79", "source_name": "hollywood film", "target_name": "popular culture", "weight": 1.0, "year": 2012}, {"source": "51", "target": "52", "source_name": "cultural identity", "target_name": "folk song", "weight": 1.0, "year": 2012}, {"source": "51", "target": "53", "source_name": "cultural identity", "target_name": "popular music", "weight": 2.0, "year": 2012}, {"source": "51", "target": "60", "source_name": "cultural identity", "target_name": "cultural studies", "weight": 2.0, "year": 2012}, {"source": "51", "target": "65", "source_name": "cultural identity", "target_name": "country music", "weight": 1.0, "year": 2012}, {"source": "51", "target": "66", "source_name": "cultural identity", "target_name": "hong kong", "weight": 1.0, "year": 2012}, {"source": "51", "target": "72", "source_name": "cultural identity", "target_name": "jimi hendrix", "weight": 2.0, "year": 2012}, {"source": "51", "target": "74", "source_name": "cultural identity", "target_name": "united states", "weight": 2.0, "year": 2012}, {"source": "51", "target": "77", "source_name": "cultural identity", "target_name": "rock music", "weight": 6.0, "year": 2012}, {"source": "51", "target": "79", "source_name": "cultural identity", "target_name": "popular culture", "weight": 2.0, "year": 2012}, {"source": "51", "target": "80", "source_name": "cultural identity", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "52", "target": "53", "source_name": "folk song", "target_name": "popular music", "weight": 8.0, "year": 2012}, {"source": "52", "target": "54", "source_name": "folk song", "target_name": "american popular music", "weight": 2.0, "year": 2012}, {"source": "52", "target": "65", "source_name": "folk song", "target_name": "country music", "weight": 1.0, "year": 2012}, {"source": "52", "target": "66", "source_name": "folk song", "target_name": "hong kong", "weight": 1.0, "year": 2012}, {"source": "52", "target": "69", "source_name": "folk song", "target_name": "classical music", "weight": 2.0, "year": 2012}, {"source": "52", "target": "74", "source_name": "folk song", "target_name": "united states", "weight": 1.0, "year": 2012}, {"source": "52", "target": "77", "source_name": "folk song", "target_name": "rock music", "weight": 3.0, "year": 2012}, {"source": "52", "target": "80", "source_name": "folk song", "target_name": "folk music", "weight": 6.0, "year": 2012}, {"source": "52", "target": "87", "source_name": "folk song", "target_name": "music hall", "weight": 1.0, "year": 2012}, {"source": "52", "target": "89", "source_name": "folk song", "target_name": "electronic music", "weight": 1.0, "year": 2012}, {"source": "53", "target": "54", "source_name": "popular music", "target_name": "american popular music", "weight": 14.0, "year": 2012}, {"source": "53", "target": "55", "source_name": "popular music", "target_name": "rock criticism", "weight": 4.0, "year": 2012}, {"source": "53", "target": "56", "source_name": "popular music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2012}, {"source": "53", "target": "57", "source_name": "popular music", "target_name": "north america", "weight": 6.0, "year": 2012}, {"source": "53", "target": "58", "source_name": "popular music", "target_name": "music therapy", "weight": 1.0, "year": 2012}, {"source": "53", "target": "59", "source_name": "popular music", "target_name": "college students", "weight": 3.0, "year": 2012}, {"source": "53", "target": "60", "source_name": "popular music", "target_name": "cultural studies", "weight": 8.0, "year": 2012}, {"source": "53", "target": "61", "source_name": "popular music", "target_name": "progressive rock", "weight": 7.0, "year": 2012}, {"source": "53", "target": "62", "source_name": "popular music", "target_name": "led zeppelin", "weight": 2.0, "year": 2012}, {"source": "53", "target": "64", "source_name": "popular music", "target_name": "english language", "weight": 1.0, "year": 2012}, {"source": "53", "target": "65", "source_name": "popular music", "target_name": "country music", "weight": 11.0, "year": 2012}, {"source": "53", "target": "66", "source_name": "popular music", "target_name": "hong kong", "weight": 4.0, "year": 2012}, {"source": "53", "target": "67", "source_name": "popular music", "target_name": "rock art", "weight": 8.0, "year": 2012}, {"source": "53", "target": "69", "source_name": "popular music", "target_name": "classical music", "weight": 12.0, "year": 2012}, {"source": "53", "target": "70", "source_name": "popular music", "target_name": "world war", "weight": 6.0, "year": 2012}, {"source": "53", "target": "71", "source_name": "popular music", "target_name": "latin american", "weight": 2.0, "year": 2012}, {"source": "53", "target": "72", "source_name": "popular music", "target_name": "jimi hendrix", "weight": 5.0, "year": 2012}, {"source": "53", "target": "73", "source_name": "popular music", "target_name": "southern rock", "weight": 2.0, "year": 2012}, {"source": "53", "target": "74", "source_name": "popular music", "target_name": "united states", "weight": 19.0, "year": 2012}, {"source": "53", "target": "75", "source_name": "popular music", "target_name": "world war ii", "weight": 4.0, "year": 2012}, {"source": "53", "target": "76", "source_name": "popular music", "target_name": "los angeles", "weight": 6.0, "year": 2012}, {"source": "53", "target": "77", "source_name": "popular music", "target_name": "rock music", "weight": 108.0, "year": 2012}, {"source": "53", "target": "78", "source_name": "popular music", "target_name": "hip hop", "weight": 11.0, "year": 2012}, {"source": "53", "target": "79", "source_name": "popular music", "target_name": "popular culture", "weight": 21.0, "year": 2012}, {"source": "53", "target": "80", "source_name": "popular music", "target_name": "folk music", "weight": 16.0, "year": 2012}, {"source": "53", "target": "82", "source_name": "popular music", "target_name": "heavy metal", "weight": 9.0, "year": 2012}, {"source": "53", "target": "83", "source_name": "popular music", "target_name": "folk rock", "weight": 2.0, "year": 2012}, {"source": "53", "target": "85", "source_name": "popular music", "target_name": "jewish music", "weight": 2.0, "year": 2012}, {"source": "53", "target": "87", "source_name": "popular music", "target_name": "music hall", "weight": 3.0, "year": 2012}, {"source": "53", "target": "88", "source_name": "popular music", "target_name": "oxford university press", "weight": 4.0, "year": 2012}, {"source": "53", "target": "89", "source_name": "popular music", "target_name": "electronic music", "weight": 8.0, "year": 2012}, {"source": "53", "target": "90", "source_name": "popular music", "target_name": "blues rock", "weight": 1.0, "year": 2012}, {"source": "54", "target": "55", "source_name": "american popular music", "target_name": "rock criticism", "weight": 1.0, "year": 2012}, {"source": "54", "target": "65", "source_name": "american popular music", "target_name": "country music", "weight": 5.0, "year": 2012}, {"source": "54", "target": "69", "source_name": "american popular music", "target_name": "classical music", "weight": 3.0, "year": 2012}, {"source": "54", "target": "70", "source_name": "american popular music", "target_name": "world war", "weight": 1.0, "year": 2012}, {"source": "54", "target": "71", "source_name": "american popular music", "target_name": "latin american", "weight": 1.0, "year": 2012}, {"source": "54", "target": "74", "source_name": "american popular music", "target_name": "united states", "weight": 5.0, "year": 2012}, {"source": "54", "target": "75", "source_name": "american popular music", "target_name": "world war ii", "weight": 1.0, "year": 2012}, {"source": "54", "target": "76", "source_name": "american popular music", "target_name": "los angeles", "weight": 1.0, "year": 2012}, {"source": "54", "target": "77", "source_name": "american popular music", "target_name": "rock music", "weight": 3.0, "year": 2012}, {"source": "54", "target": "78", "source_name": "american popular music", "target_name": "hip hop", "weight": 2.0, "year": 2012}, {"source": "54", "target": "79", "source_name": "american popular music", "target_name": "popular culture", "weight": 1.0, "year": 2012}, {"source": "54", "target": "80", "source_name": "american popular music", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "54", "target": "88", "source_name": "american popular music", "target_name": "oxford university press", "weight": 1.0, "year": 2012}, {"source": "54", "target": "89", "source_name": "american popular music", "target_name": "electronic music", "weight": 1.0, "year": 2012}, {"source": "55", "target": "56", "source_name": "rock criticism", "target_name": "bruce springsteen", "weight": 1.0, "year": 2012}, {"source": "55", "target": "57", "source_name": "rock criticism", "target_name": "north america", "weight": 1.0, "year": 2012}, {"source": "55", "target": "61", "source_name": "rock criticism", "target_name": "progressive rock", "weight": 2.0, "year": 2012}, {"source": "55", "target": "65", "source_name": "rock criticism", "target_name": "country music", "weight": 1.0, "year": 2012}, {"source": "55", "target": "69", "source_name": "rock criticism", "target_name": "classical music", "weight": 1.0, "year": 2012}, {"source": "55", "target": "74", "source_name": "rock criticism", "target_name": "united states", "weight": 2.0, "year": 2012}, {"source": "55", "target": "77", "source_name": "rock criticism", "target_name": "rock music", "weight": 5.0, "year": 2012}, {"source": "55", "target": "78", "source_name": "rock criticism", "target_name": "hip hop", "weight": 1.0, "year": 2012}, {"source": "55", "target": "79", "source_name": "rock criticism", "target_name": "popular culture", "weight": 1.0, "year": 2012}, {"source": "55", "target": "88", "source_name": "rock criticism", "target_name": "oxford university press", "weight": 1.0, "year": 2012}, {"source": "56", "target": "72", "source_name": "bruce springsteen", "target_name": "jimi hendrix", "weight": 1.0, "year": 2012}, {"source": "56", "target": "77", "source_name": "bruce springsteen", "target_name": "rock music", "weight": 2.0, "year": 2012}, {"source": "56", "target": "78", "source_name": "bruce springsteen", "target_name": "hip hop", "weight": 1.0, "year": 2012}, {"source": "56", "target": "79", "source_name": "bruce springsteen", "target_name": "popular culture", "weight": 1.0, "year": 2012}, {"source": "56", "target": "82", "source_name": "bruce springsteen", "target_name": "heavy metal", "weight": 1.0, "year": 2012}, {"source": "57", "target": "61", "source_name": "north america", "target_name": "progressive rock", "weight": 1.0, "year": 2012}, {"source": "57", "target": "65", "source_name": "north america", "target_name": "country music", "weight": 2.0, "year": 2012}, {"source": "57", "target": "71", "source_name": "north america", "target_name": "latin american", "weight": 1.0, "year": 2012}, {"source": "57", "target": "73", "source_name": "north america", "target_name": "southern rock", "weight": 1.0, "year": 2012}, {"source": "57", "target": "74", "source_name": "north america", "target_name": "united states", "weight": 3.0, "year": 2012}, {"source": "57", "target": "77", "source_name": "north america", "target_name": "rock music", "weight": 4.0, "year": 2012}, {"source": "57", "target": "78", "source_name": "north america", "target_name": "hip hop", "weight": 1.0, "year": 2012}, {"source": "57", "target": "80", "source_name": "north america", "target_name": "folk music", "weight": 2.0, "year": 2012}, {"source": "58", "target": "64", "source_name": "music therapy", "target_name": "english language", "weight": 1.0, "year": 2012}, {"source": "58", "target": "77", "source_name": "music therapy", "target_name": "rock music", "weight": 3.0, "year": 2012}, {"source": "59", "target": "69", "source_name": "college students", "target_name": "classical music", "weight": 1.0, "year": 2012}, {"source": "59", "target": "74", "source_name": "college students", "target_name": "united states", "weight": 1.0, "year": 2012}, {"source": "59", "target": "77", "source_name": "college students", "target_name": "rock music", "weight": 4.0, "year": 2012}, {"source": "59", "target": "82", "source_name": "college students", "target_name": "heavy metal", "weight": 1.0, "year": 2012}, {"source": "60", "target": "62", "source_name": "cultural studies", "target_name": "led zeppelin", "weight": 1.0, "year": 2012}, {"source": "60", "target": "71", "source_name": "cultural studies", "target_name": "latin american", "weight": 1.0, "year": 2012}, {"source": "60", "target": "74", "source_name": "cultural studies", "target_name": "united states", "weight": 1.0, "year": 2012}, {"source": "60", "target": "76", "source_name": "cultural studies", "target_name": "los angeles", "weight": 1.0, "year": 2012}, {"source": "60", "target": "77", "source_name": "cultural studies", "target_name": "rock music", "weight": 7.0, "year": 2012}, {"source": "60", "target": "79", "source_name": "cultural studies", "target_name": "popular culture", "weight": 5.0, "year": 2012}, {"source": "60", "target": "80", "source_name": "cultural studies", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "60", "target": "85", "source_name": "cultural studies", "target_name": "jewish music", "weight": 1.0, "year": 2012}, {"source": "60", "target": "87", "source_name": "cultural studies", "target_name": "music hall", "weight": 1.0, "year": 2012}, {"source": "60", "target": "88", "source_name": "cultural studies", "target_name": "oxford university press", "weight": 3.0, "year": 2012}, {"source": "60", "target": "89", "source_name": "cultural studies", "target_name": "electronic music", "weight": 1.0, "year": 2012}, {"source": "61", "target": "69", "source_name": "progressive rock", "target_name": "classical music", "weight": 2.0, "year": 2012}, {"source": "61", "target": "72", "source_name": "progressive rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2012}, {"source": "61", "target": "74", "source_name": "progressive rock", "target_name": "united states", "weight": 2.0, "year": 2012}, {"source": "61", "target": "77", "source_name": "progressive rock", "target_name": "rock music", "weight": 21.0, "year": 2012}, {"source": "61", "target": "80", "source_name": "progressive rock", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "61", "target": "82", "source_name": "progressive rock", "target_name": "heavy metal", "weight": 2.0, "year": 2012}, {"source": "61", "target": "83", "source_name": "progressive rock", "target_name": "folk rock", "weight": 1.0, "year": 2012}, {"source": "61", "target": "88", "source_name": "progressive rock", "target_name": "oxford university press", "weight": 1.0, "year": 2012}, {"source": "61", "target": "89", "source_name": "progressive rock", "target_name": "electronic music", "weight": 1.0, "year": 2012}, {"source": "62", "target": "69", "source_name": "led zeppelin", "target_name": "classical music", "weight": 1.0, "year": 2012}, {"source": "62", "target": "77", "source_name": "led zeppelin", "target_name": "rock music", "weight": 1.0, "year": 2012}, {"source": "62", "target": "88", "source_name": "led zeppelin", "target_name": "oxford university press", "weight": 1.0, "year": 2012}, {"source": "64", "target": "66", "source_name": "english language", "target_name": "hong kong", "weight": 1.0, "year": 2012}, {"source": "64", "target": "67", "source_name": "english language", "target_name": "rock art", "weight": 1.0, "year": 2012}, {"source": "64", "target": "70", "source_name": "english language", "target_name": "world war", "weight": 1.0, "year": 2012}, {"source": "64", "target": "74", "source_name": "english language", "target_name": "united states", "weight": 1.0, "year": 2012}, {"source": "64", "target": "77", "source_name": "english language", "target_name": "rock music", "weight": 2.0, "year": 2012}, {"source": "64", "target": "79", "source_name": "english language", "target_name": "popular culture", "weight": 1.0, "year": 2012}, {"source": "64", "target": "83", "source_name": "english language", "target_name": "folk rock", "weight": 1.0, "year": 2012}, {"source": "65", "target": "69", "source_name": "country music", "target_name": "classical music", "weight": 4.0, "year": 2012}, {"source": "65", "target": "72", "source_name": "country music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2012}, {"source": "65", "target": "73", "source_name": "country music", "target_name": "southern rock", "weight": 2.0, "year": 2012}, {"source": "65", "target": "74", "source_name": "country music", "target_name": "united states", "weight": 3.0, "year": 2012}, {"source": "65", "target": "77", "source_name": "country music", "target_name": "rock music", "weight": 5.0, "year": 2012}, {"source": "65", "target": "78", "source_name": "country music", "target_name": "hip hop", "weight": 1.0, "year": 2012}, {"source": "65", "target": "79", "source_name": "country music", "target_name": "popular culture", "weight": 2.0, "year": 2012}, {"source": "65", "target": "80", "source_name": "country music", "target_name": "folk music", "weight": 3.0, "year": 2012}, {"source": "65", "target": "82", "source_name": "country music", "target_name": "heavy metal", "weight": 1.0, "year": 2012}, {"source": "65", "target": "89", "source_name": "country music", "target_name": "electronic music", "weight": 2.0, "year": 2012}, {"source": "66", "target": "67", "source_name": "hong kong", "target_name": "rock art", "weight": 1.0, "year": 2012}, {"source": "66", "target": "77", "source_name": "hong kong", "target_name": "rock music", "weight": 2.0, "year": 2012}, {"source": "66", "target": "78", "source_name": "hong kong", "target_name": "hip hop", "weight": 1.0, "year": 2012}, {"source": "66", "target": "80", "source_name": "hong kong", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "66", "target": "83", "source_name": "hong kong", "target_name": "folk rock", "weight": 1.0, "year": 2012}, {"source": "66", "target": "85", "source_name": "hong kong", "target_name": "jewish music", "weight": 1.0, "year": 2012}, {"source": "67", "target": "74", "source_name": "rock art", "target_name": "united states", "weight": 1.0, "year": 2012}, {"source": "67", "target": "77", "source_name": "rock art", "target_name": "rock music", "weight": 6.0, "year": 2012}, {"source": "67", "target": "79", "source_name": "rock art", "target_name": "popular culture", "weight": 1.0, "year": 2012}, {"source": "67", "target": "83", "source_name": "rock art", "target_name": "folk rock", "weight": 1.0, "year": 2012}, {"source": "67", "target": "89", "source_name": "rock art", "target_name": "electronic music", "weight": 1.0, "year": 2012}, {"source": "68", "target": "77", "source_name": "hearing loss", "target_name": "rock music", "weight": 3.0, "year": 2012}, {"source": "69", "target": "70", "source_name": "classical music", "target_name": "world war", "weight": 1.0, "year": 2012}, {"source": "69", "target": "71", "source_name": "classical music", "target_name": "latin american", "weight": 1.0, "year": 2012}, {"source": "69", "target": "72", "source_name": "classical music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2012}, {"source": "69", "target": "74", "source_name": "classical music", "target_name": "united states", "weight": 4.0, "year": 2012}, {"source": "69", "target": "76", "source_name": "classical music", "target_name": "los angeles", "weight": 1.0, "year": 2012}, {"source": "69", "target": "77", "source_name": "classical music", "target_name": "rock music", "weight": 31.0, "year": 2012}, {"source": "69", "target": "78", "source_name": "classical music", "target_name": "hip hop", "weight": 2.0, "year": 2012}, {"source": "69", "target": "79", "source_name": "classical music", "target_name": "popular culture", "weight": 2.0, "year": 2012}, {"source": "69", "target": "80", "source_name": "classical music", "target_name": "folk music", "weight": 4.0, "year": 2012}, {"source": "69", "target": "82", "source_name": "classical music", "target_name": "heavy metal", "weight": 3.0, "year": 2012}, {"source": "69", "target": "87", "source_name": "classical music", "target_name": "music hall", "weight": 1.0, "year": 2012}, {"source": "69", "target": "88", "source_name": "classical music", "target_name": "oxford university press", "weight": 1.0, "year": 2012}, {"source": "69", "target": "89", "source_name": "classical music", "target_name": "electronic music", "weight": 2.0, "year": 2012}, {"source": "70", "target": "74", "source_name": "world war", "target_name": "united states", "weight": 2.0, "year": 2012}, {"source": "70", "target": "75", "source_name": "world war", "target_name": "world war ii", "weight": 4.0, "year": 2012}, {"source": "70", "target": "77", "source_name": "world war", "target_name": "rock music", "weight": 6.0, "year": 2012}, {"source": "70", "target": "79", "source_name": "world war", "target_name": "popular culture", "weight": 1.0, "year": 2012}, {"source": "70", "target": "80", "source_name": "world war", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "70", "target": "87", "source_name": "world war", "target_name": "music hall", "weight": 1.0, "year": 2012}, {"source": "70", "target": "89", "source_name": "world war", "target_name": "electronic music", "weight": 1.0, "year": 2012}, {"source": "71", "target": "74", "source_name": "latin american", "target_name": "united states", "weight": 3.0, "year": 2012}, {"source": "71", "target": "76", "source_name": "latin american", "target_name": "los angeles", "weight": 2.0, "year": 2012}, {"source": "71", "target": "77", "source_name": "latin american", "target_name": "rock music", "weight": 4.0, "year": 2012}, {"source": "71", "target": "79", "source_name": "latin american", "target_name": "popular culture", "weight": 1.0, "year": 2012}, {"source": "72", "target": "74", "source_name": "jimi hendrix", "target_name": "united states", "weight": 1.0, "year": 2012}, {"source": "72", "target": "77", "source_name": "jimi hendrix", "target_name": "rock music", "weight": 6.0, "year": 2012}, {"source": "72", "target": "79", "source_name": "jimi hendrix", "target_name": "popular culture", "weight": 2.0, "year": 2012}, {"source": "72", "target": "80", "source_name": "jimi hendrix", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "72", "target": "89", "source_name": "jimi hendrix", "target_name": "electronic music", "weight": 1.0, "year": 2012}, {"source": "73", "target": "77", "source_name": "southern rock", "target_name": "rock music", "weight": 1.0, "year": 2012}, {"source": "73", "target": "80", "source_name": "southern rock", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "74", "target": "76", "source_name": "united states", "target_name": "los angeles", "weight": 1.0, "year": 2012}, {"source": "74", "target": "77", "source_name": "united states", "target_name": "rock music", "weight": 13.0, "year": 2012}, {"source": "74", "target": "78", "source_name": "united states", "target_name": "hip hop", "weight": 1.0, "year": 2012}, {"source": "74", "target": "79", "source_name": "united states", "target_name": "popular culture", "weight": 3.0, "year": 2012}, {"source": "74", "target": "80", "source_name": "united states", "target_name": "folk music", "weight": 3.0, "year": 2012}, {"source": "74", "target": "88", "source_name": "united states", "target_name": "oxford university press", "weight": 1.0, "year": 2012}, {"source": "74", "target": "89", "source_name": "united states", "target_name": "electronic music", "weight": 3.0, "year": 2012}, {"source": "75", "target": "76", "source_name": "world war ii", "target_name": "los angeles", "weight": 1.0, "year": 2012}, {"source": "75", "target": "77", "source_name": "world war ii", "target_name": "rock music", "weight": 3.0, "year": 2012}, {"source": "75", "target": "80", "source_name": "world war ii", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "76", "target": "77", "source_name": "los angeles", "target_name": "rock music", "weight": 7.0, "year": 2012}, {"source": "76", "target": "79", "source_name": "los angeles", "target_name": "popular culture", "weight": 1.0, "year": 2012}, {"source": "76", "target": "80", "source_name": "los angeles", "target_name": "folk music", "weight": 1.0, "year": 2012}, {"source": "77", "target": "78", "source_name": "rock music", "target_name": "hip hop", "weight": 3.0, "year": 2012}, {"source": "77", "target": "79", "source_name": "rock music", "target_name": "popular culture", "weight": 18.0, "year": 2012}, {"source": "77", "target": "80", "source_name": "rock music", "target_name": "folk music", "weight": 9.0, "year": 2012}, {"source": "77", "target": "82", "source_name": "rock music", "target_name": "heavy metal", "weight": 12.0, "year": 2012}, {"source": "77", "target": "83", "source_name": "rock music", "target_name": "folk rock", "weight": 1.0, "year": 2012}, {"source": "77", "target": "87", "source_name": "rock music", "target_name": "music hall", "weight": 3.0, "year": 2012}, {"source": "77", "target": "88", "source_name": "rock music", "target_name": "oxford university press", "weight": 2.0, "year": 2012}, {"source": "77", "target": "89", "source_name": "rock music", "target_name": "electronic music", "weight": 6.0, "year": 2012}, {"source": "78", "target": "79", "source_name": "hip hop", "target_name": "popular culture", "weight": 2.0, "year": 2012}, {"source": "78", "target": "80", "source_name": "hip hop", "target_name": "folk music", "weight": 3.0, "year": 2012}, {"source": "78", "target": "82", "source_name": "hip hop", "target_name": "heavy metal", "weight": 2.0, "year": 2012}, {"source": "78", "target": "85", "source_name": "hip hop", "target_name": "jewish music", "weight": 1.0, "year": 2012}, {"source": "78", "target": "88", "source_name": "hip hop", "target_name": "oxford university press", "weight": 1.0, "year": 2012}, {"source": "78", "target": "90", "source_name": "hip hop", "target_name": "blues rock", "weight": 1.0, "year": 2012}, {"source": "79", "target": "80", "source_name": "popular culture", "target_name": "folk music", "weight": 2.0, "year": 2012}, {"source": "79", "target": "82", "source_name": "popular culture", "target_name": "heavy metal", "weight": 2.0, "year": 2012}, {"source": "79", "target": "85", "source_name": "popular culture", "target_name": "jewish music", "weight": 1.0, "year": 2012}, {"source": "79", "target": "87", "source_name": "popular culture", "target_name": "music hall", "weight": 2.0, "year": 2012}, {"source": "79", "target": "88", "source_name": "popular culture", "target_name": "oxford university press", "weight": 1.0, "year": 2012}, {"source": "79", "target": "89", "source_name": "popular culture", "target_name": "electronic music", "weight": 1.0, "year": 2012}, {"source": "80", "target": "85", "source_name": "folk music", "target_name": "jewish music", "weight": 2.0, "year": 2012}, {"source": "80", "target": "87", "source_name": "folk music", "target_name": "music hall", "weight": 2.0, "year": 2012}, {"source": "80", "target": "88", "source_name": "folk music", "target_name": "oxford university press", "weight": 1.0, "year": 2012}, {"source": "80", "target": "89", "source_name": "folk music", "target_name": "electronic music", "weight": 3.0, "year": 2012}, {"source": "82", "target": "83", "source_name": "heavy metal", "target_name": "folk rock", "weight": 1.0, "year": 2012}, {"source": "85", "target": "88", "source_name": "jewish music", "target_name": "oxford university press", "weight": 1.0, "year": 2012}, {"source": "88", "target": "89", "source_name": "oxford university press", "target_name": "electronic music", "weight": 1.0, "year": 2012}]}, {"2013": [{"source": "1", "target": "7", "source_name": "rock star", "target_name": "nineteenth century", "weight": 1.0, "year": 2013}, {"source": "1", "target": "9", "source_name": "rock star", "target_name": "compact disc", "weight": 1.0, "year": 2013}, {"source": "1", "target": "19", "source_name": "rock star", "target_name": "music video", "weight": 1.0, "year": 2013}, {"source": "1", "target": "28", "source_name": "rock star", "target_name": "high school", "weight": 1.0, "year": 2013}, {"source": "1", "target": "29", "source_name": "rock star", "target_name": "rolling stone", "weight": 1.0, "year": 2013}, {"source": "1", "target": "36", "source_name": "rock star", "target_name": "music industry", "weight": 3.0, "year": 2013}, {"source": "1", "target": "41", "source_name": "rock star", "target_name": "youth culture", "weight": 2.0, "year": 2013}, {"source": "1", "target": "42", "source_name": "rock star", "target_name": "simon frith", "weight": 1.0, "year": 2013}, {"source": "1", "target": "48", "source_name": "rock star", "target_name": "pop music", "weight": 4.0, "year": 2013}, {"source": "1", "target": "51", "source_name": "rock star", "target_name": "cultural identity", "weight": 1.0, "year": 2013}, {"source": "1", "target": "53", "source_name": "rock star", "target_name": "popular music", "weight": 4.0, "year": 2013}, {"source": "1", "target": "60", "source_name": "rock star", "target_name": "cultural studies", "weight": 1.0, "year": 2013}, {"source": "1", "target": "69", "source_name": "rock star", "target_name": "classical music", "weight": 1.0, "year": 2013}, {"source": "1", "target": "74", "source_name": "rock star", "target_name": "united states", "weight": 1.0, "year": 2013}, {"source": "1", "target": "77", "source_name": "rock star", "target_name": "rock music", "weight": 8.0, "year": 2013}, {"source": "1", "target": "82", "source_name": "rock star", "target_name": "heavy metal", "weight": 2.0, "year": 2013}, {"source": "2", "target": "3", "source_name": "indie rock", "target_name": "glam rock", "weight": 1.0, "year": 2013}, {"source": "2", "target": "19", "source_name": "indie rock", "target_name": "music video", "weight": 1.0, "year": 2013}, {"source": "2", "target": "20", "source_name": "indie rock", "target_name": "garage rock", "weight": 1.0, "year": 2013}, {"source": "2", "target": "24", "source_name": "indie rock", "target_name": "punk rock", "weight": 1.0, "year": 2013}, {"source": "2", "target": "27", "source_name": "indie rock", "target_name": "pop rock", "weight": 1.0, "year": 2013}, {"source": "2", "target": "36", "source_name": "indie rock", "target_name": "music industry", "weight": 1.0, "year": 2013}, {"source": "2", "target": "44", "source_name": "indie rock", "target_name": "alternative rock", "weight": 1.0, "year": 2013}, {"source": "2", "target": "47", "source_name": "indie rock", "target_name": "hard rock", "weight": 1.0, "year": 2013}, {"source": "2", "target": "48", "source_name": "indie rock", "target_name": "pop music", "weight": 2.0, "year": 2013}, {"source": "2", "target": "51", "source_name": "indie rock", "target_name": "cultural identity", "weight": 1.0, "year": 2013}, {"source": "2", "target": "53", "source_name": "indie rock", "target_name": "popular music", "weight": 2.0, "year": 2013}, {"source": "2", "target": "67", "source_name": "indie rock", "target_name": "rock art", "weight": 1.0, "year": 2013}, {"source": "2", "target": "72", "source_name": "indie rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2013}, {"source": "2", "target": "74", "source_name": "indie rock", "target_name": "united states", "weight": 1.0, "year": 2013}, {"source": "2", "target": "77", "source_name": "indie rock", "target_name": "rock music", "weight": 5.0, "year": 2013}, {"source": "2", "target": "78", "source_name": "indie rock", "target_name": "hip hop", "weight": 1.0, "year": 2013}, {"source": "2", "target": "80", "source_name": "indie rock", "target_name": "folk music", "weight": 1.0, "year": 2013}, {"source": "3", "target": "20", "source_name": "glam rock", "target_name": "garage rock", "weight": 1.0, "year": 2013}, {"source": "3", "target": "24", "source_name": "glam rock", "target_name": "punk rock", "weight": 2.0, "year": 2013}, {"source": "3", "target": "27", "source_name": "glam rock", "target_name": "pop rock", "weight": 1.0, "year": 2013}, {"source": "3", "target": "41", "source_name": "glam rock", "target_name": "youth culture", "weight": 1.0, "year": 2013}, {"source": "3", "target": "44", "source_name": "glam rock", "target_name": "alternative rock", "weight": 1.0, "year": 2013}, {"source": "3", "target": "47", "source_name": "glam rock", "target_name": "hard rock", "weight": 1.0, "year": 2013}, {"source": "3", "target": "53", "source_name": "glam rock", "target_name": "popular music", "weight": 1.0, "year": 2013}, {"source": "3", "target": "77", "source_name": "glam rock", "target_name": "rock music", "weight": 2.0, "year": 2013}, {"source": "3", "target": "79", "source_name": "glam rock", "target_name": "popular culture", "weight": 2.0, "year": 2013}, {"source": "3", "target": "87", "source_name": "glam rock", "target_name": "music hall", "weight": 1.0, "year": 2013}, {"source": "4", "target": "7", "source_name": "gregorian chant", "target_name": "nineteenth century", "weight": 1.0, "year": 2013}, {"source": "4", "target": "9", "source_name": "gregorian chant", "target_name": "compact disc", "weight": 1.0, "year": 2013}, {"source": "4", "target": "10", "source_name": "gregorian chant", "target_name": "african american", "weight": 1.0, "year": 2013}, {"source": "4", "target": "19", "source_name": "gregorian chant", "target_name": "music video", "weight": 1.0, "year": 2013}, {"source": "4", "target": "22", "source_name": "gregorian chant", "target_name": "chamber music", "weight": 1.0, "year": 2013}, {"source": "4", "target": "36", "source_name": "gregorian chant", "target_name": "music industry", "weight": 1.0, "year": 2013}, {"source": "4", "target": "37", "source_name": "gregorian chant", "target_name": "middle ages", "weight": 1.0, "year": 2013}, {"source": "4", "target": "38", "source_name": "gregorian chant", "target_name": "summary additional listening", "weight": 1.0, "year": 2013}, {"source": "4", "target": "40", "source_name": "gregorian chant", "target_name": "musical instruments", "weight": 1.0, "year": 2013}, {"source": "4", "target": "48", "source_name": "gregorian chant", "target_name": "pop music", "weight": 1.0, "year": 2013}, {"source": "4", "target": "52", "source_name": "gregorian chant", "target_name": "folk song", "weight": 1.0, "year": 2013}, {"source": "4", "target": "53", "source_name": "gregorian chant", "target_name": "popular music", "weight": 1.0, "year": 2013}, {"source": "4", "target": "54", "source_name": "gregorian chant", "target_name": "american popular music", "weight": 1.0, "year": 2013}, {"source": "4", "target": "65", "source_name": "gregorian chant", "target_name": "country music", "weight": 1.0, "year": 2013}, {"source": "4", "target": "69", "source_name": "gregorian chant", "target_name": "classical music", "weight": 1.0, "year": 2013}, {"source": "4", "target": "74", "source_name": "gregorian chant", "target_name": "united states", "weight": 1.0, "year": 2013}, {"source": "4", "target": "80", "source_name": "gregorian chant", "target_name": "folk music", "weight": 1.0, "year": 2013}, {"source": "4", "target": "89", "source_name": "gregorian chant", "target_name": "electronic music", "weight": 1.0, "year": 2013}, {"source": "5", "target": "12", "source_name": "jesus christ superstar", "target_name": "rock opera", "weight": 3.0, "year": 2013}, {"source": "5", "target": "15", "source_name": "jesus christ superstar", "target_name": "musical theatre", "weight": 3.0, "year": 2013}, {"source": "5", "target": "33", "source_name": "jesus christ superstar", "target_name": "jesus christ", "weight": 5.0, "year": 2013}, {"source": "5", "target": "34", "source_name": "jesus christ superstar", "target_name": "mass media", "weight": 1.0, "year": 2013}, {"source": "5", "target": "41", "source_name": "jesus christ superstar", "target_name": "youth culture", "weight": 1.0, "year": 2013}, {"source": "5", "target": "53", "source_name": "jesus christ superstar", "target_name": "popular music", "weight": 1.0, "year": 2013}, {"source": "5", "target": "77", "source_name": "jesus christ superstar", "target_name": "rock music", "weight": 7.0, "year": 2013}, {"source": "6", "target": "10", "source_name": "elvis presley", "target_name": "african american", "weight": 1.0, "year": 2013}, {"source": "6", "target": "16", "source_name": "elvis presley", "target_name": "bob dylan", "weight": 3.0, "year": 2013}, {"source": "6", "target": "17", "source_name": "elvis presley", "target_name": "civil rights", "weight": 1.0, "year": 2013}, {"source": "6", "target": "23", "source_name": "elvis presley", "target_name": "electronic dance music", "weight": 1.0, "year": 2013}, {"source": "6", "target": "29", "source_name": "elvis presley", "target_name": "rolling stone", "weight": 1.0, "year": 2013}, {"source": "6", "target": "36", "source_name": "elvis presley", "target_name": "music industry", "weight": 3.0, "year": 2013}, {"source": "6", "target": "40", "source_name": "elvis presley", "target_name": "musical instruments", "weight": 1.0, "year": 2013}, {"source": "6", "target": "41", "source_name": "elvis presley", "target_name": "youth culture", "weight": 1.0, "year": 2013}, {"source": "6", "target": "42", "source_name": "elvis presley", "target_name": "simon frith", "weight": 2.0, "year": 2013}, {"source": "6", "target": "47", "source_name": "elvis presley", "target_name": "hard rock", "weight": 1.0, "year": 2013}, {"source": "6", "target": "48", "source_name": "elvis presley", "target_name": "pop music", "weight": 1.0, "year": 2013}, {"source": "6", "target": "49", "source_name": "elvis presley", "target_name": "music theory", "weight": 1.0, "year": 2013}, {"source": "6", "target": "51", "source_name": "elvis presley", "target_name": "cultural identity", "weight": 1.0, "year": 2013}, {"source": "6", "target": "53", "source_name": "elvis presley", "target_name": "popular music", "weight": 7.0, "year": 2013}, {"source": "6", "target": "54", "source_name": "elvis presley", "target_name": "american popular music", "weight": 3.0, "year": 2013}, {"source": "6", "target": "56", "source_name": "elvis presley", "target_name": "bruce springsteen", "weight": 1.0, "year": 2013}, {"source": "6", "target": "60", "source_name": "elvis presley", "target_name": "cultural studies", "weight": 1.0, "year": 2013}, {"source": "6", "target": "67", "source_name": "elvis presley", "target_name": "rock art", "weight": 1.0, "year": 2013}, {"source": "6", "target": "70", "source_name": "elvis presley", "target_name": "world war", "weight": 1.0, "year": 2013}, {"source": "6", "target": "72", "source_name": "elvis presley", "target_name": "jimi hendrix", "weight": 1.0, "year": 2013}, {"source": "6", "target": "74", "source_name": "elvis presley", "target_name": "united states", "weight": 2.0, "year": 2013}, {"source": "6", "target": "75", "source_name": "elvis presley", "target_name": "world war ii", "weight": 1.0, "year": 2013}, {"source": "6", "target": "77", "source_name": "elvis presley", "target_name": "rock music", "weight": 5.0, "year": 2013}, {"source": "6", "target": "78", "source_name": "elvis presley", "target_name": "hip hop", "weight": 1.0, "year": 2013}, {"source": "6", "target": "79", "source_name": "elvis presley", "target_name": "popular culture", "weight": 1.0, "year": 2013}, {"source": "6", "target": "80", "source_name": "elvis presley", "target_name": "folk music", "weight": 1.0, "year": 2013}, {"source": "6", "target": "82", "source_name": "elvis presley", "target_name": "heavy metal", "weight": 1.0, "year": 2013}, {"source": "7", "target": "9", "source_name": "nineteenth century", "target_name": "compact disc", "weight": 1.0, "year": 2013}, {"source": "7", "target": "10", "source_name": "nineteenth century", "target_name": "african american", "weight": 1.0, "year": 2013}, {"source": "7", "target": "19", "source_name": "nineteenth century", "target_name": "music video", "weight": 1.0, "year": 2013}, {"source": "7", "target": "22", "source_name": "nineteenth century", "target_name": "chamber music", "weight": 1.0, "year": 2013}, {"source": "7", "target": "34", "source_name": "nineteenth century", "target_name": "mass media", "weight": 1.0, "year": 2013}, {"source": "7", "target": "36", "source_name": "nineteenth century", "target_name": "music industry", "weight": 2.0, "year": 2013}, {"source": "7", "target": "38", "source_name": "nineteenth century", "target_name": "summary additional listening", "weight": 1.0, "year": 2013}, {"source": "7", "target": "40", "source_name": "nineteenth century", "target_name": "musical instruments", "weight": 1.0, "year": 2013}, {"source": "7", "target": "43", "source_name": "nineteenth century", "target_name": "music education", "weight": 1.0, "year": 2013}, {"source": "7", "target": "45", "source_name": "nineteenth century", "target_name": "double bass", "weight": 2.0, "year": 2013}, {"source": "7", "target": "48", "source_name": "nineteenth century", "target_name": "pop music", "weight": 1.0, "year": 2013}, {"source": "7", "target": "50", "source_name": "nineteenth century", "target_name": "hollywood film", "weight": 1.0, "year": 2013}, {"source": "7", "target": "52", "source_name": "nineteenth century", "target_name": "folk song", "weight": 3.0, "year": 2013}, {"source": "7", "target": "53", "source_name": "nineteenth century", "target_name": "popular music", "weight": 4.0, "year": 2013}, {"source": "7", "target": "54", "source_name": "nineteenth century", "target_name": "american popular music", "weight": 1.0, "year": 2013}, {"source": "7", "target": "65", "source_name": "nineteenth century", "target_name": "country music", "weight": 1.0, "year": 2013}, {"source": "7", "target": "67", "source_name": "nineteenth century", "target_name": "rock art", "weight": 1.0, "year": 2013}, {"source": "7", "target": "69", "source_name": "nineteenth century", "target_name": "classical music", "weight": 4.0, "year": 2013}, {"source": "7", "target": "70", "source_name": "nineteenth century", "target_name": "world war", "weight": 2.0, "year": 2013}, {"source": "7", "target": "74", "source_name": "nineteenth century", "target_name": "united states", "weight": 2.0, "year": 2013}, {"source": "7", "target": "77", "source_name": "nineteenth century", "target_name": "rock music", "weight": 4.0, "year": 2013}, {"source": "7", "target": "79", "source_name": "nineteenth century", "target_name": "popular culture", "weight": 1.0, "year": 2013}, {"source": "7", "target": "80", "source_name": "nineteenth century", "target_name": "folk music", "weight": 3.0, "year": 2013}, {"source": "7", "target": "85", "source_name": "nineteenth century", "target_name": "jewish music", "weight": 1.0, "year": 2013}, {"source": "7", "target": "87", "source_name": "nineteenth century", "target_name": "music hall", "weight": 1.0, "year": 2013}, {"source": "7", "target": "89", "source_name": "nineteenth century", "target_name": "electronic music", "weight": 1.0, "year": 2013}, {"source": "8", "target": "20", "source_name": "christian rock", "target_name": "garage rock", "weight": 1.0, "year": 2013}, {"source": "8", "target": "36", "source_name": "christian rock", "target_name": "music industry", "weight": 1.0, "year": 2013}, {"source": "8", "target": "44", "source_name": "christian rock", "target_name": "alternative rock", "weight": 1.0, "year": 2013}, {"source": "8", "target": "53", "source_name": "christian rock", "target_name": "popular music", "weight": 2.0, "year": 2013}, {"source": "8", "target": "57", "source_name": "christian rock", "target_name": "north america", "weight": 1.0, "year": 2013}, {"source": "8", "target": "65", "source_name": "christian rock", "target_name": "country music", "weight": 1.0, "year": 2013}, {"source": "8", "target": "73", "source_name": "christian rock", "target_name": "southern rock", "weight": 1.0, "year": 2013}, {"source": "8", "target": "77", "source_name": "christian rock", "target_name": "rock music", "weight": 1.0, "year": 2013}, {"source": "8", "target": "79", "source_name": "christian rock", "target_name": "popular culture", "weight": 1.0, "year": 2013}, {"source": "8", "target": "80", "source_name": "christian rock", "target_name": "folk music", "weight": 1.0, "year": 2013}, {"source": "9", "target": "10", "source_name": "compact disc", "target_name": "african american", "weight": 1.0, "year": 2013}, {"source": "9", "target": "11", "source_name": "compact disc", "target_name": "south africa", "weight": 1.0, "year": 2013}, {"source": "9", "target": "18", "source_name": "compact disc", "target_name": "middle class", "weight": 1.0, "year": 2013}, {"source": "9", "target": "19", "source_name": "compact disc", "target_name": "music video", "weight": 1.0, "year": 2013}, {"source": "9", "target": "24", "source_name": "compact disc", "target_name": "punk rock", "weight": 1.0, "year": 2013}, {"source": "9", "target": "25", "source_name": "compact disc", "target_name": "russian rock", "weight": 1.0, "year": 2013}, {"source": "9", "target": "28", "source_name": "compact disc", "target_name": "high school", "weight": 1.0, "year": 2013}, {"source": "9", "target": "29", "source_name": "compact disc", "target_name": "rolling stone", "weight": 1.0, "year": 2013}, {"source": "9", "target": "30", "source_name": "compact disc", "target_name": "rock band", "weight": 1.0, "year": 2013}, {"source": "9", "target": "36", "source_name": "compact disc", "target_name": "music industry", "weight": 1.0, "year": 2013}, {"source": "9", "target": "37", "source_name": "compact disc", "target_name": "middle ages", "weight": 1.0, "year": 2013}, {"source": "9", "target": "46", "source_name": "compact disc", "target_name": "music festival", "weight": 1.0, "year": 2013}, {"source": "9", "target": "48", "source_name": "compact disc", "target_name": "pop music", "weight": 1.0, "year": 2013}, {"source": "9", "target": "53", "source_name": "compact disc", "target_name": "popular music", "weight": 4.0, "year": 2013}, {"source": "9", "target": "61", "source_name": "compact disc", "target_name": "progressive rock", "weight": 1.0, "year": 2013}, {"source": "9", "target": "66", "source_name": "compact disc", "target_name": "hong kong", "weight": 1.0, "year": 2013}, {"source": "9", "target": "74", "source_name": "compact disc", "target_name": "united states", "weight": 1.0, "year": 2013}, {"source": "9", "target": "77", "source_name": "compact disc", "target_name": "rock music", "weight": 2.0, "year": 2013}, {"source": "9", "target": "78", "source_name": "compact disc", "target_name": "hip hop", "weight": 1.0, "year": 2013}, {"source": "9", "target": "79", "source_name": "compact disc", "target_name": "popular culture", "weight": 1.0, "year": 2013}, {"source": "9", "target": "80", "source_name": "compact disc", "target_name": "folk music", "weight": 3.0, "year": 2013}, {"source": "9", "target": "85", "source_name": "compact disc", "target_name": "jewish music", "weight": 2.0, "year": 2013}, {"source": "9", "target": "89", "source_name": "compact disc", "target_name": "electronic music", "weight": 1.0, "year": 2013}, {"source": "10", "target": "11", "source_name": "african american", "target_name": "south africa", "weight": 1.0, "year": 2013}, {"source": "10", "target": "15", "source_name": "african american", "target_name": "musical theatre", "weight": 1.0, "year": 2013}, {"source": "10", "target": "17", "source_name": "african american", "target_name": "civil rights", "weight": 2.0, "year": 2013}, {"source": "10", "target": "19", "source_name": "african american", "target_name": "music video", "weight": 1.0, "year": 2013}, {"source": "10", "target": "21", "source_name": "african american", "target_name": "social protest", "weight": 1.0, "year": 2013}, {"source": "10", "target": "22", "source_name": "african american", "target_name": "chamber music", "weight": 1.0, "year": 2013}, {"source": "10", "target": "23", "source_name": "african american", "target_name": "electronic dance music", "weight": 1.0, "year": 2013}, {"source": "10", "target": "24", "source_name": "african american", "target_name": "punk rock", "weight": 2.0, "year": 2013}, {"source": "10", "target": "36", "source_name": "african american", "target_name": "music industry", "weight": 2.0, "year": 2013}, {"source": "10", "target": "38", "source_name": "african american", "target_name": "summary additional listening", "weight": 1.0, "year": 2013}, {"source": "10", "target": "40", "source_name": "african american", "target_name": "musical instruments", "weight": 1.0, "year": 2013}, {"source": "10", "target": "52", "source_name": "african american", "target_name": "folk song", "weight": 1.0, "year": 2013}, {"source": "10", "target": "53", "source_name": "african american", "target_name": "popular music", "weight": 7.0, "year": 2013}, {"source": "10", "target": "54", "source_name": "african american", "target_name": "american popular music", "weight": 1.0, "year": 2013}, {"source": "10", "target": "61", "source_name": "african american", "target_name": "progressive rock", "weight": 1.0, "year": 2013}, {"source": "10", "target": "65", "source_name": "african american", "target_name": "country music", "weight": 1.0, "year": 2013}, {"source": "10", "target": "69", "source_name": "african american", "target_name": "classical music", "weight": 1.0, "year": 2013}, {"source": "10", "target": "74", "source_name": "african american", "target_name": "united states", "weight": 5.0, "year": 2013}, {"source": "10", "target": "75", "source_name": "african american", "target_name": "world war ii", "weight": 1.0, "year": 2013}, {"source": "10", "target": "77", "source_name": "african american", "target_name": "rock music", "weight": 2.0, "year": 2013}, {"source": "10", "target": "78", "source_name": "african american", "target_name": "hip hop", "weight": 1.0, "year": 2013}, {"source": "10", "target": "79", "source_name": "african american", "target_name": "popular culture", "weight": 2.0, "year": 2013}, {"source": "10", "target": "80", "source_name": "african american", "target_name": "folk music", "weight": 4.0, "year": 2013}, {"source": "10", "target": "82", "source_name": "african american", "target_name": "heavy metal", "weight": 1.0, "year": 2013}, {"source": "10", "target": "89", "source_name": "african american", "target_name": "electronic music", "weight": 1.0, "year": 2013}, {"source": "11", "target": "17", "source_name": "south africa", "target_name": "civil rights", "weight": 1.0, "year": 2013}, {"source": "11", "target": "21", "source_name": "south africa", "target_name": "social protest", "weight": 2.0, "year": 2013}, {"source": "11", "target": "23", "source_name": "south africa", "target_name": "electronic dance music", "weight": 1.0, "year": 2013}, {"source": "11", "target": "25", "source_name": "south africa", "target_name": "russian rock", "weight": 1.0, "year": 2013}, {"source": "11", "target": "36", "source_name": "south africa", "target_name": "music industry", "weight": 1.0, "year": 2013}, {"source": "11", "target": "46", "source_name": "south africa", "target_name": "music festival", "weight": 3.0, "year": 2013}, {"source": "11", "target": "53", "source_name": "south africa", "target_name": "popular music", "weight": 4.0, "year": 2013}, {"source": "11", "target": "61", "source_name": "south africa", "target_name": "progressive rock", "weight": 1.0, "year": 2013}, {"source": "11", "target": "66", "source_name": "south africa", "target_name": "hong kong", "weight": 1.0, "year": 2013}, {"source": "11", "target": "74", "source_name": "south africa", "target_name": "united states", "weight": 3.0, "year": 2013}, {"source": "11", "target": "78", "source_name": "south africa", "target_name": "hip hop", "weight": 1.0, "year": 2013}, {"source": "11", "target": "80", "source_name": "south africa", "target_name": "folk music", "weight": 3.0, "year": 2013}, {"source": "11", "target": "85", "source_name": "south africa", "target_name": "jewish music", "weight": 1.0, "year": 2013}, {"source": "11", "target": "87", "source_name": "south africa", "target_name": "music hall", "weight": 1.0, "year": 2013}, {"source": "11", "target": "88", "source_name": "south africa", "target_name": "oxford university press", "weight": 1.0, "year": 2013}, {"source": "12", "target": "15", "source_name": "rock opera", "target_name": "musical theatre", "weight": 3.0, "year": 2013}, {"source": "12", "target": "33", "source_name": "rock opera", "target_name": "jesus christ", "weight": 2.0, "year": 2013}, {"source": "12", "target": "41", "source_name": "rock opera", "target_name": "youth culture", "weight": 1.0, "year": 2013}, {"source": "12", "target": "53", "source_name": "rock opera", "target_name": "popular music", "weight": 1.0, "year": 2013}, {"source": "12", "target": "57", "source_name": "rock opera", "target_name": "north america", "weight": 1.0, "year": 2013}, {"source": "12", "target": "77", "source_name": "rock opera", "target_name": "rock music", "weight": 2.0, "year": 2013}, {"source": "12", "target": "79", "source_name": "rock opera", "target_name": "popular culture", "weight": 1.0, "year": 2013}, {"source": "15", "target": "33", "source_name": "musical theatre", "target_name": "jesus christ", "weight": 3.0, "year": 2013}, {"source": "15", "target": "53", "source_name": "musical theatre", "target_name": "popular music", "weight": 1.0, "year": 2013}, {"source": "15", "target": "70", "source_name": "musical theatre", "target_name": "world war", "weight": 1.0, "year": 2013}, {"source": "15", "target": "74", "source_name": "musical theatre", "target_name": "united states", "weight": 1.0, "year": 2013}, {"source": "15", "target": "77", "source_name": "musical theatre", "target_name": "rock music", "weight": 4.0, "year": 2013}, {"source": "15", "target": "87", "source_name": "musical theatre", "target_name": "music hall", "weight": 1.0, "year": 2013}, {"source": "16", "target": "29", "source_name": "bob dylan", "target_name": "rolling stone", "weight": 2.0, "year": 2013}, {"source": "16", "target": "30", "source_name": "bob dylan", "target_name": "rock band", "weight": 2.0, "year": 2013}, {"source": "16", "target": "36", "source_name": "bob dylan", "target_name": "music industry", "weight": 2.0, "year": 2013}, {"source": "16", "target": "42", "source_name": "bob dylan", "target_name": "simon frith", "weight": 1.0, "year": 2013}, {"source": "16", "target": "48", "source_name": "bob dylan", "target_name": "pop music", "weight": 3.0, "year": 2013}, {"source": "16", "target": "52", "source_name": "bob dylan", "target_name": "folk song", "weight": 1.0, "year": 2013}, {"source": "16", "target": "53", "source_name": "bob dylan", "target_name": "popular music", "weight": 9.0, "year": 2013}, {"source": "16", "target": "54", "source_name": "bob dylan", "target_name": "american popular music", "weight": 1.0, "year": 2013}, {"source": "16", "target": "69", "source_name": "bob dylan", "target_name": "classical music", "weight": 1.0, "year": 2013}, {"source": "16", "target": "70", "source_name": "bob dylan", "target_name": "world war", "weight": 1.0, "year": 2013}, {"source": "16", "target": "72", "source_name": "bob dylan", "target_name": "jimi hendrix", "weight": 2.0, "year": 2013}, {"source": "16", "target": "75", "source_name": "bob dylan", "target_name": "world war ii", "weight": 1.0, "year": 2013}, {"source": "16", "target": "77", "source_name": "bob dylan", "target_name": "rock music", "weight": 6.0, "year": 2013}, {"source": "16", "target": "79", "source_name": "bob dylan", "target_name": "popular culture", "weight": 1.0, "year": 2013}, {"source": "16", "target": "80", "source_name": "bob dylan", "target_name": "folk music", "weight": 5.0, "year": 2013}, {"source": "17", "target": "21", "source_name": "civil rights", "target_name": "social protest", "weight": 1.0, "year": 2013}, {"source": "17", "target": "30", "source_name": "civil rights", "target_name": "rock band", "weight": 1.0, "year": 2013}, {"source": "17", "target": "41", "source_name": "civil rights", "target_name": "youth culture", "weight": 1.0, "year": 2013}, {"source": "17", "target": "53", "source_name": "civil rights", "target_name": "popular music", "weight": 4.0, "year": 2013}, {"source": "17", "target": "54", "source_name": "civil rights", "target_name": "american popular music", "weight": 1.0, "year": 2013}, {"source": "17", "target": "61", "source_name": "civil rights", "target_name": "progressive rock", "weight": 1.0, "year": 2013}, {"source": "17", "target": "70", "source_name": "civil rights", "target_name": "world war", "weight": 1.0, "year": 2013}, {"source": "17", "target": "73", "source_name": "civil rights", "target_name": "southern rock", "weight": 1.0, "year": 2013}, {"source": "17", "target": "74", "source_name": "civil rights", "target_name": "united states", "weight": 3.0, "year": 2013}, {"source": "17", "target": "75", "source_name": "civil rights", "target_name": "world war ii", "weight": 1.0, "year": 2013}, {"source": "17", "target": "77", "source_name": "civil rights", "target_name": "rock music", "weight": 3.0, "year": 2013}, {"source": "17", "target": "79", "source_name": "civil rights", "target_name": "popular culture", "weight": 1.0, "year": 2013}, {"source": "17", "target": "80", "source_name": "civil rights", "target_name": "folk music", "weight": 2.0, "year": 2013}, {"source": "18", "target": "19", "source_name": "middle class", "target_name": "music video", "weight": 1.0, "year": 2013}, {"source": "18", "target": "28", "source_name": "middle class", "target_name": "high school", "weight": 1.0, "year": 2013}, {"source": "18", "target": "30", "source_name": "middle class", "target_name": "rock band", "weight": 2.0, "year": 2013}, {"source": "18", "target": "53", "source_name": "middle class", "target_name": "popular music", "weight": 1.0, "year": 2013}, {"source": "18", "target": "61", "source_name": "middle class", "target_name": "progressive rock", "weight": 2.0, "year": 2013}, {"source": "18", "target": "77", "source_name": "middle class", "target_name": "rock music", "weight": 2.0, "year": 2013}, {"source": "19", "target": "22", "source_name": "music video", "target_name": "chamber music", "weight": 1.0, "year": 2013}, {"source": "19", "target": "28", "source_name": "music video", "target_name": "high school", "weight": 1.0, "year": 2013}, {"source": "19", "target": "30", "source_name": "music video", "target_name": "rock band", "weight": 3.0, "year": 2013}, {"source": "19", "target": "36", "source_name": "music video", "target_name": "music industry", "weight": 2.0, "year": 2013}, {"source": "19", "target": "38", "source_name": "music video", "target_name": "summary additional listening", "weight": 1.0, "year": 2013}, {"source": "19", "target": "40", "source_name": "music video", "target_name": "musical instruments", "weight": 1.0, "year": 2013}, {"source": "19", "target": "47", "source_name": "music video", "target_name": "hard rock", "weight": 1.0, "year": 2013}, {"source": "19", "target": "48", "source_name": "music video", "target_name": "pop music", "weight": 3.0, "year": 2013}, {"source": "19", "target": "49", "source_name": "music video", "target_name": "music theory", "weight": 1.0, "year": 2013}, {"source": "19", "target": "51", "source_name": "music video", "target_name": "cultural identity", "weight": 2.0, "year": 2013}, {"source": "19", "target": "52", "source_name": "music video", "target_name": "folk song", "weight": 1.0, "year": 2013}, {"source": "19", "target": "53", "source_name": "music video", "target_name": "popular music", "weight": 8.0, "year": 2013}, {"source": "19", "target": "54", "source_name": "music video", "target_name": "american popular music", "weight": 1.0, "year": 2013}, {"source": "19", "target": "61", "source_name": "music video", "target_name": "progressive rock", "weight": 1.0, "year": 2013}, {"source": "19", "target": "65", "source_name": "music video", "target_name": "country music", "weight": 4.0, "year": 2013}, {"source": "19", "target": "69", "source_name": "music video", "target_name": "classical music", "weight": 1.0, "year": 2013}, {"source": "19", "target": "72", "source_name": "music video", "target_name": "jimi hendrix", "weight": 1.0, "year": 2013}, {"source": "19", "target": "74", "source_name": "music video", "target_name": "united states", "weight": 2.0, "year": 2013}, {"source": "19", "target": "76", "source_name": "music video", "target_name": "los angeles", "weight": 1.0, "year": 2013}, {"source": "19", "target": "77", "source_name": "music video", "target_name": "rock music", "weight": 9.0, "year": 2013}, {"source": "19", "target": "78", "source_name": "music video", "target_name": "hip hop", "weight": 2.0, "year": 2013}, {"source": "19", "target": "80", "source_name": "music video", "target_name": "folk music", "weight": 1.0, "year": 2013}, {"source": "19", "target": "82", "source_name": "music video", "target_name": "heavy metal", "weight": 1.0, "year": 2013}, {"source": "19", "target": "89", "source_name": "music video", "target_name": "electronic music", "weight": 1.0, "year": 2013}, {"source": "19", "target": "90", "source_name": "music video", "target_name": "blues rock", "weight": 1.0, "year": 2013}, {"source": "20", "target": "24", "source_name": "garage rock", "target_name": "punk rock", "weight": 1.0, "year": 2013}, {"source": "20", "target": "27", "source_name": "garage rock", "target_name": "pop rock", "weight": 1.0, "year": 2013}, {"source": "20", "target": "29", "source_name": "garage rock", "target_name": "rolling stone", "weight": 1.0, "year": 2013}, {"source": "20", "target": "30", "source_name": "garage rock", "target_name": "rock band", "weight": 2.0, "year": 2013}, {"source": "20", "target": "43", "source_name": "garage rock", "target_name": "music education", "weight": 1.0, "year": 2013}, {"source": "20", "target": "44", "source_name": "garage rock", "target_name": "alternative rock", "weight": 2.0, "year": 2013}, {"source": "20", "target": "47", "source_name": "garage rock", "target_name": "hard rock", "weight": 1.0, "year": 2013}, {"source": "20", "target": "48", "source_name": "garage rock", "target_name": "pop music", "weight": 1.0, "year": 2013}, {"source": "20", "target": "53", "source_name": "garage rock", "target_name": "popular music", "weight": 4.0, "year": 2013}, {"source": "20", "target": "57", "source_name": "garage rock", "target_name": "north america", "weight": 1.0, "year": 2013}, {"source": "20", "target": "65", "source_name": "garage rock", "target_name": "country music", "weight": 1.0, "year": 2013}, {"source": "20", "target": "73", "source_name": "garage rock", "target_name": "southern rock", "weight": 1.0, "year": 2013}, {"source": "20", "target": "77", "source_name": "garage rock", "target_name": "rock music", "weight": 4.0, "year": 2013}, {"source": "20", "target": "80", "source_name": "garage rock", "target_name": "folk music", "weight": 1.0, "year": 2013}, {"source": "21", "target": "47", "source_name": "social protest", "target_name": "hard rock", "weight": 1.0, "year": 2013}, {"source": "21", "target": "48", "source_name": "social protest", "target_name": "pop music", "weight": 1.0, "year": 2013}, {"source": "21", "target": "53", "source_name": "social protest", "target_name": "popular music", "weight": 4.0, "year": 2013}, {"source": "21", "target": "57", "source_name": "social protest", "target_name": "north america", "weight": 2.0, "year": 2013}, {"source": "21", "target": "61", "source_name": "social protest", "target_name": "progressive rock", "weight": 1.0, "year": 2013}, {"source": "21", "target": "71", "source_name": "social protest", "target_name": "latin american", "weight": 1.0, "year": 2013}, {"source": "21", "target": "74", "source_name": "social protest", "target_name": "united states", "weight": 2.0, "year": 2013}, {"source": "21", "target": "77", "source_name": "social protest", "target_name": "rock music", "weight": 1.0, "year": 2013}, {"source": "21", "target": "80", "source_name": "social protest", "target_name": "folk music", "weight": 2.0, "year": 2013}, {"source": "21", "target": "82", "source_name": "social protest", "target_name": "heavy metal", "weight": 1.0, "year": 2013}, {"source": "21", "target": "87", "source_name": "social protest", "target_name": "music hall", "weight": 1.0, "year": 2013}, {"source": "22", "target": "35", "source_name": "chamber music", "target_name": "ancient greek", "weight": 1.0, "year": 2013}, {"source": "22", "target": "36", "source_name": "chamber music", "target_name": "music industry", "weight": 1.0, "year": 2013}, {"source": "22", "target": "38", "source_name": "chamber music", "target_name": "summary additional listening", "weight": 1.0, "year": 2013}, {"source": "22", "target": "40", "source_name": "chamber music", "target_name": "musical instruments", "weight": 1.0, "year": 2013}, {"source": "22", "target": "52", "source_name": "chamber music", "target_name": "folk song", "weight": 1.0, "year": 2013}, {"source": "22", "target": "53", "source_name": "chamber music", "target_name": "popular music", "weight": 1.0, "year": 2013}, {"source": "22", "target": "54", "source_name": "chamber music", "target_name": "american popular music", "weight": 1.0, "year": 2013}, {"source": "22", "target": "65", "source_name": "chamber music", "target_name": "country music", "weight": 2.0, "year": 2013}, {"source": "22", "target": "69", "source_name": "chamber music", "target_name": "classical music", "weight": 2.0, "year": 2013}, {"source": "22", "target": "74", "source_name": "chamber music", "target_name": "united states", "weight": 1.0, "year": 2013}, {"source": "22", "target": "77", "source_name": "chamber music", "target_name": "rock music", "weight": 1.0, "year": 2013}, {"source": "22", "target": "80", "source_name": "chamber music", "target_name": "folk music", "weight": 2.0, "year": 2013}, {"source": "22", "target": "89", "source_name": "chamber music", "target_name": "electronic music", "weight": 3.0, "year": 2013}, {"source": "23", "target": "36", "source_name": "electronic dance music", "target_name": "music industry", "weight": 2.0, "year": 2013}, {"source": "23", "target": "42", "source_name": "electronic dance music", "target_name": "simon frith", "weight": 2.0, "year": 2013}, {"source": "23", "target": "47", "source_name": "electronic dance music", "target_name": "hard rock", "weight": 1.0, "year": 2013}, {"source": "23", "target": "53", "source_name": "electronic dance music", "target_name": "popular music", "weight": 8.0, "year": 2013}, {"source": "23", "target": "56", "source_name": "electronic dance music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2013}, {"source": "23", "target": "60", "source_name": "electronic dance music", "target_name": "cultural studies", "weight": 2.0, "year": 2013}, {"source": "23", "target": "67", "source_name": "electronic dance music", "target_name": "rock art", "weight": 1.0, "year": 2013}, {"source": "23", "target": "74", "source_name": "electronic dance music", "target_name": "united states", "weight": 2.0, "year": 2013}, {"source": "23", "target": "76", "source_name": "electronic dance music", "target_name": "los angeles", "weight": 1.0, "year": 2013}, {"source": "23", "target": "77", "source_name": "electronic dance music", "target_name": "rock music", "weight": 1.0, "year": 2013}, {"source": "23", "target": "78", "source_name": "electronic dance music", "target_name": "hip hop", "weight": 1.0, "year": 2013}, {"source": "23", "target": "79", "source_name": "electronic dance music", "target_name": "popular culture", "weight": 1.0, "year": 2013}, {"source": "23", "target": "82", "source_name": "electronic dance music", "target_name": "heavy metal", "weight": 2.0, "year": 2013}, {"source": "23", "target": "88", "source_name": "electronic dance music", "target_name": "oxford university press", "weight": 1.0, "year": 2013}, {"source": "23", "target": "89", "source_name": "electronic dance music", "target_name": "electronic music", "weight": 4.0, "year": 2013}, {"source": "24", "target": "27", "source_name": "punk rock", "target_name": "pop rock", "weight": 1.0, "year": 2013}, {"source": "24", "target": "30", "source_name": "punk rock", "target_name": "rock band", "weight": 1.0, "year": 2013}, {"source": "24", "target": "36", "source_name": "punk rock", "target_name": "music industry", "weight": 1.0, "year": 2013}, {"source": "24", "target": "41", "source_name": "punk rock", "target_name": "youth culture", "weight": 2.0, "year": 2013}, {"source": "24", "target": "42", "source_name": "punk rock", "target_name": "simon frith", "weight": 1.0, "year": 2013}, {"source": "24", "target": "44", "source_name": "punk rock", "target_name": "alternative rock", "weight": 3.0, "year": 2013}, {"source": "24", "target": "47", "source_name": "punk rock", "target_name": "hard rock", "weight": 4.0, "year": 2013}, {"source": "24", "target": "48", "source_name": "punk rock", "target_name": "pop music", "weight": 4.0, "year": 2013}, {"source": "24", "target": "53", "source_name": "punk rock", "target_name": "popular music", "weight": 10.0, "year": 2013}, {"source": "24", "target": "61", "source_name": "punk rock", "target_name": "progressive rock", "weight": 2.0, "year": 2013}, {"source": "24", "target": "65", "source_name": "punk rock", "target_name": "country music", "weight": 1.0, "year": 2013}, {"source": "24", "target": "69", "source_name": "punk rock", "target_name": "classical music", "weight": 1.0, "year": 2013}, {"source": "24", "target": "74", "source_name": "punk rock", "target_name": "united states", "weight": 3.0, "year": 2013}, {"source": "24", "target": "77", "source_name": "punk rock", "target_name": "rock music", "weight": 9.0, "year": 2013}, {"source": "24", "target": "78", "source_name": "punk rock", "target_name": "hip hop", "weight": 1.0, "year": 2013}, {"source": "24", "target": "79", "source_name": "punk rock", "target_name": "popular culture", "weight": 1.0, "year": 2013}, {"source": "24", "target": "80", "source_name": "punk rock", "target_name": "folk music", "weight": 1.0, "year": 2013}, {"source": "24", "target": "82", "source_name": "punk rock", "target_name": "heavy metal", "weight": 3.0, "year": 2013}, {"source": "25", "target": "30", "source_name": "russian rock", "target_name": "rock band", "weight": 1.0, "year": 2013}, {"source": "25", "target": "37", "source_name": "russian rock", "target_name": "middle ages", "weight": 1.0, "year": 2013}, {"source": "25", "target": "46", "source_name": "russian rock", "target_name": "music festival", "weight": 1.0, "year": 2013}, {"source": "25", "target": "53", "source_name": "russian rock", "target_name": "popular music", "weight": 2.0, "year": 2013}, {"source": "25", "target": "66", "source_name": "russian rock", "target_name": "hong kong", "weight": 1.0, "year": 2013}, {"source": "25", "target": "77", "source_name": "russian rock", "target_name": "rock music", "weight": 2.0, "year": 2013}, {"source": "25", "target": "78", "source_name": "russian rock", "target_name": "hip hop", "weight": 1.0, "year": 2013}, {"source": "25", "target": "80", "source_name": "russian rock", "target_name": "folk music", "weight": 1.0, "year": 2013}, {"source": "25", "target": "85", "source_name": "russian rock", "target_name": "jewish music", "weight": 1.0, "year": 2013}, {"source": "27", "target": "44", "source_name": "pop rock", "target_name": "alternative rock", "weight": 1.0, "year": 2013}, {"source": "27", "target": "47", "source_name": "pop rock", "target_name": "hard rock", "weight": 1.0, "year": 2013}, {"source": "27", "target": "48", "source_name": "pop rock", "target_name": "pop music", "weight": 1.0, "year": 2013}, {"source": "27", "target": "53", "source_name": "pop rock", "target_name": "popular music", "weight": 1.0, "year": 2013}, {"source": "27", "target": "64", "source_name": "pop rock", "target_name": "english language", "weight": 1.0, "year": 2013}, {"source": "27", "target": "65", "source_name": "pop rock", "target_name": "country music", "weight": 1.0, "year": 2013}, {"source": "27", "target": "66", "source_name": "pop rock", "target_name": "hong kong", "weight": 1.0, "year": 2013}, {"source": "27", "target": "67", "source_name": "pop rock", "target_name": "rock art", "weight": 1.0, "year": 2013}, {"source": "27", "target": "77", "source_name": "pop rock", "target_name": "rock music", "weight": 1.0, "year": 2013}, {"source": "27", "target": "83", "source_name": "pop rock", "target_name": "folk rock", "weight": 1.0, "year": 2013}, {"source": "28", "target": "30", "source_name": "high school", "target_name": "rock band", "weight": 1.0, "year": 2013}, {"source": "28", "target": "37", "source_name": "high school", "target_name": "middle ages", "weight": 1.0, "year": 2013}, {"source": "28", "target": "48", "source_name": "high school", "target_name": "pop music", "weight": 1.0, "year": 2013}, {"source": "28", "target": "61", "source_name": "high school", "target_name": "progressive rock", "weight": 1.0, "year": 2013}, {"source": "28", "target": "77", "source_name": "high school", "target_name": "rock music", "weight": 3.0, "year": 2013}, {"source": "28", "target": "82", "source_name": "high school", "target_name": "heavy metal", "weight": 1.0, "year": 2013}, {"source": "29", "target": "36", "source_name": "rolling stone", "target_name": "music industry", "weight": 1.0, "year": 2013}, {"source": "29", "target": "42", "source_name": "rolling stone", "target_name": "simon frith", "weight": 1.0, "year": 2013}, {"source": "29", "target": "48", "source_name": "rolling stone", "target_name": "pop music", "weight": 4.0, "year": 2013}, {"source": "29", "target": "53", "source_name": "rolling stone", "target_name": "popular music", "weight": 6.0, "year": 2013}, {"source": "29", "target": "55", "source_name": "rolling stone", "target_name": "rock criticism", "weight": 4.0, "year": 2013}, {"source": "29", "target": "56", "source_name": "rolling stone", "target_name": "bruce springsteen", "weight": 1.0, "year": 2013}, {"source": "29", "target": "62", "source_name": "rolling stone", "target_name": "led zeppelin", "weight": 1.0, "year": 2013}, {"source": "29", "target": "72", "source_name": "rolling stone", "target_name": "jimi hendrix", "weight": 2.0, "year": 2013}, {"source": "29", "target": "74", "source_name": "rolling stone", "target_name": "united states", "weight": 1.0, "year": 2013}, {"source": "29", "target": "77", "source_name": "rolling stone", "target_name": "rock music", "weight": 8.0, "year": 2013}, {"source": "29", "target": "79", "source_name": "rolling stone", "target_name": "popular culture", "weight": 1.0, "year": 2013}, {"source": "29", "target": "80", "source_name": "rolling stone", "target_name": "folk music", "weight": 1.0, "year": 2013}, {"source": "29", "target": "87", "source_name": "rolling stone", "target_name": "music hall", "weight": 1.0, "year": 2013}, {"source": "30", "target": "36", "source_name": "rock band", "target_name": "music industry", "weight": 2.0, "year": 2013}, {"source": "30", "target": "37", "source_name": "rock band", "target_name": "middle ages", "weight": 2.0, "year": 2013}, {"source": "30", "target": "41", "source_name": "rock band", "target_name": "youth culture", "weight": 1.0, "year": 2013}, {"source": "30", "target": "43", "source_name": "rock band", "target_name": "music education", "weight": 2.0, "year": 2013}, {"source": "30", "target": "44", "source_name": "rock band", "target_name": "alternative rock", "weight": 1.0, "year": 2013}, {"source": "30", "target": "47", "source_name": "rock band", "target_name": "hard rock", "weight": 1.0, "year": 2013}, {"source": "30", "target": "48", "source_name": "rock band", "target_name": "pop music", "weight": 1.0, "year": 2013}, {"source": "30", "target": "52", "source_name": "rock band", "target_name": "folk song", "weight": 2.0, "year": 2013}, {"source": "30", "target": "53", "source_name": "rock band", "target_name": "popular music", "weight": 19.0, "year": 2013}, {"source": "30", "target": "54", "source_name": "rock band", "target_name": "american popular music", "weight": 1.0, "year": 2013}, {"source": "30", "target": "61", "source_name": "rock band", "target_name": "progressive rock", "weight": 9.0, "year": 2013}, {"source": "30", "target": "65", "source_name": "rock band", "target_name": "country music", "weight": 1.0, "year": 2013}, {"source": "30", "target": "69", "source_name": "rock band", "target_name": "classical music", "weight": 2.0, "year": 2013}, {"source": "30", "target": "72", "source_name": "rock band", "target_name": "jimi hendrix", "weight": 2.0, "year": 2013}, {"source": "30", "target": "73", "source_name": "rock band", "target_name": "southern rock", "weight": 2.0, "year": 2013}, {"source": "30", "target": "74", "source_name": "rock band", "target_name": "united states", "weight": 2.0, "year": 2013}, {"source": "30", "target": "76", "source_name": "rock band", "target_name": "los angeles", "weight": 1.0, "year": 2013}, {"source": "30", "target": "77", "source_name": "rock band", "target_name": "rock music", "weight": 29.0, "year": 2013}, {"source": "30", "target": "79", "source_name": "rock band", "target_name": "popular culture", "weight": 1.0, "year": 2013}, {"source": "30", "target": "80", "source_name": "rock band", "target_name": "folk music", "weight": 2.0, "year": 2013}, {"source": "30", "target": "82", "source_name": "rock band", "target_name": "heavy metal", "weight": 2.0, "year": 2013}, {"source": "30", "target": "83", "source_name": "rock band", "target_name": "folk rock", "weight": 1.0, "year": 2013}, {"source": "32", "target": "43", "source_name": "higher education", "target_name": "music education", "weight": 1.0, "year": 2013}, {"source": "33", "target": "53", "source_name": "jesus christ", "target_name": "popular music", "weight": 1.0, "year": 2013}, {"source": "33", "target": "70", "source_name": "jesus christ", "target_name": "world war", "weight": 1.0, "year": 2013}, {"source": "33", "target": "77", "source_name": "jesus christ", "target_name": "rock music", "weight": 4.0, "year": 2013}, {"source": "34", "target": "36", "source_name": "mass media", "target_name": "music industry", "weight": 1.0, "year": 2013}, {"source": "34", "target": "40", "source_name": "mass media", "target_name": "musical instruments", "weight": 1.0, "year": 2013}, {"source": "34", "target": "41", "source_name": "mass media", "target_name": "youth culture", "weight": 1.0, "year": 2013}, {"source": "34", "target": "43", "source_name": "mass media", "target_name": "music education", "weight": 2.0, "year": 2013}, {"source": "34", "target": "46", "source_name": "mass media", "target_name": "music festival", "weight": 1.0, "year": 2013}, {"source": "34", "target": "48", "source_name": "mass media", "target_name": "pop music", "weight": 2.0, "year": 2013}, {"source": "34", "target": "51", "source_name": "mass media", "target_name": "cultural identity", "weight": 1.0, "year": 2013}, {"source": "34", "target": "52", "source_name": "mass media", "target_name": "folk song", "weight": 2.0, "year": 2013}, {"source": "34", "target": "53", "source_name": "mass media", "target_name": "popular music", "weight": 6.0, "year": 2013}, {"source": "34", "target": "65", "source_name": "mass media", "target_name": "country music", "weight": 1.0, "year": 2013}, {"source": "34", "target": "66", "source_name": "mass media", "target_name": "hong kong", "weight": 1.0, "year": 2013}, {"source": "34", "target": "67", "source_name": "mass media", "target_name": "rock art", "weight": 1.0, "year": 2013}, {"source": "34", "target": "69", "source_name": "mass media", "target_name": "classical music", "weight": 1.0, "year": 2013}, {"source": "34", "target": "77", "source_name": "mass media", "target_name": "rock music", "weight": 4.0, "year": 2013}, {"source": "34", "target": "79", "source_name": "mass media", "target_name": "popular culture", "weight": 1.0, "year": 2013}, {"source": "35", "target": "43", "source_name": "ancient greek", "target_name": "music education", "weight": 1.0, "year": 2013}, {"source": "35", "target": "65", "source_name": "ancient greek", "target_name": "country music", "weight": 1.0, "year": 2013}, {"source": "35", "target": "77", "source_name": "ancient greek", "target_name": "rock music", "weight": 1.0, "year": 2013}, {"source": "35", "target": "80", "source_name": "ancient greek", "target_name": "folk music", "weight": 1.0, "year": 2013}, {"source": "35", "target": "89", "source_name": "ancient greek", "target_name": "electronic music", "weight": 1.0, "year": 2013}, {"source": "36", "target": "38", "source_name": "music industry", "target_name": "summary additional listening", "weight": 1.0, "year": 2013}, {"source": "36", "target": "40", "source_name": "music industry", "target_name": "musical instruments", "weight": 1.0, "year": 2013}, {"source": "36", "target": "41", "source_name": "music industry", "target_name": "youth culture", "weight": 2.0, "year": 2013}, {"source": "36", "target": "42", "source_name": "music industry", "target_name": "simon frith", "weight": 2.0, "year": 2013}, {"source": "36", "target": "43", "source_name": "music industry", "target_name": "music education", "weight": 2.0, "year": 2013}, {"source": "36", "target": "46", "source_name": "music industry", "target_name": "music festival", "weight": 1.0, "year": 2013}, {"source": "36", "target": "47", "source_name": "music industry", "target_name": "hard rock", "weight": 3.0, "year": 2013}, {"source": "36", "target": "48", "source_name": "music industry", "target_name": "pop music", "weight": 10.0, "year": 2013}, {"source": "36", "target": "49", "source_name": "music industry", "target_name": "music theory", "weight": 1.0, "year": 2013}, {"source": "36", "target": "50", "source_name": "music industry", "target_name": "hollywood film", "weight": 1.0, "year": 2013}, {"source": "36", "target": "51", "source_name": "music industry", "target_name": "cultural identity", "weight": 1.0, "year": 2013}, {"source": "36", "target": "52", "source_name": "music industry", "target_name": "folk song", "weight": 1.0, "year": 2013}, {"source": "36", "target": "53", "source_name": "music industry", "target_name": "popular music", "weight": 29.0, "year": 2013}, {"source": "36", "target": "54", "source_name": "music industry", "target_name": "american popular music", "weight": 3.0, "year": 2013}, {"source": "36", "target": "55", "source_name": "music industry", "target_name": "rock criticism", "weight": 3.0, "year": 2013}, {"source": "36", "target": "56", "source_name": "music industry", "target_name": "bruce springsteen", "weight": 2.0, "year": 2013}, {"source": "36", "target": "60", "source_name": "music industry", "target_name": "cultural studies", "weight": 1.0, "year": 2013}, {"source": "36", "target": "61", "source_name": "music industry", "target_name": "progressive rock", "weight": 1.0, "year": 2013}, {"source": "36", "target": "62", "source_name": "music industry", "target_name": "led zeppelin", "weight": 1.0, "year": 2013}, {"source": "36", "target": "65", "source_name": "music industry", "target_name": "country music", "weight": 2.0, "year": 2013}, {"source": "36", "target": "66", "source_name": "music industry", "target_name": "hong kong", "weight": 1.0, "year": 2013}, {"source": "36", "target": "67", "source_name": "music industry", "target_name": "rock art", "weight": 1.0, "year": 2013}, {"source": "36", "target": "68", "source_name": "music industry", "target_name": "hearing loss", "weight": 1.0, "year": 2013}, {"source": "36", "target": "69", "source_name": "music industry", "target_name": "classical music", "weight": 6.0, "year": 2013}, {"source": "36", "target": "70", "source_name": "music industry", "target_name": "world war", "weight": 2.0, "year": 2013}, {"source": "36", "target": "72", "source_name": "music industry", "target_name": "jimi hendrix", "weight": 4.0, "year": 2013}, {"source": "36", "target": "74", "source_name": "music industry", "target_name": "united states", "weight": 4.0, "year": 2013}, {"source": "36", "target": "75", "source_name": "music industry", "target_name": "world war ii", "weight": 3.0, "year": 2013}, {"source": "36", "target": "76", "source_name": "music industry", "target_name": "los angeles", "weight": 2.0, "year": 2013}, {"source": "36", "target": "77", "source_name": "music industry", "target_name": "rock music", "weight": 18.0, "year": 2013}, {"source": "36", "target": "78", "source_name": "music industry", "target_name": "hip hop", "weight": 5.0, "year": 2013}, {"source": "36", "target": "79", "source_name": "music industry", "target_name": "popular culture", "weight": 4.0, "year": 2013}, {"source": "36", "target": "80", "source_name": "music industry", "target_name": "folk music", "weight": 4.0, "year": 2013}, {"source": "36", "target": "82", "source_name": "music industry", "target_name": "heavy metal", "weight": 2.0, "year": 2013}, {"source": "36", "target": "83", "source_name": "music industry", "target_name": "folk rock", "weight": 1.0, "year": 2013}, {"source": "36", "target": "87", "source_name": "music industry", "target_name": "music hall", "weight": 1.0, "year": 2013}, {"source": "36", "target": "88", "source_name": "music industry", "target_name": "oxford university press", "weight": 2.0, "year": 2013}, {"source": "36", "target": "89", "source_name": "music industry", "target_name": "electronic music", "weight": 2.0, "year": 2013}, {"source": "37", "target": "44", "source_name": "middle ages", "target_name": "alternative rock", "weight": 1.0, "year": 2013}, {"source": "37", "target": "58", "source_name": "middle ages", "target_name": "music therapy", "weight": 1.0, "year": 2013}, {"source": "37", "target": "61", "source_name": "middle ages", "target_name": "progressive rock", "weight": 1.0, "year": 2013}, {"source": "37", "target": "69", "source_name": "middle ages", "target_name": "classical music", "weight": 1.0, "year": 2013}, {"source": "37", "target": "77", "source_name": "middle ages", "target_name": "rock music", "weight": 3.0, "year": 2013}, {"source": "37", "target": "80", "source_name": "middle ages", "target_name": "folk music", "weight": 2.0, "year": 2013}, {"source": "38", "target": "40", "source_name": "summary additional listening", "target_name": "musical instruments", "weight": 1.0, "year": 2013}, {"source": "38", "target": "52", "source_name": "summary additional listening", "target_name": "folk song", "weight": 1.0, "year": 2013}, {"source": "38", "target": "53", "source_name": "summary additional listening", "target_name": "popular music", "weight": 1.0, "year": 2013}, {"source": "38", "target": "54", "source_name": "summary additional listening", "target_name": "american popular music", "weight": 1.0, "year": 2013}, {"source": "38", "target": "65", "source_name": "summary additional listening", "target_name": "country music", "weight": 1.0, "year": 2013}, {"source": "38", "target": "69", "source_name": "summary additional listening", "target_name": "classical music", "weight": 1.0, "year": 2013}, {"source": "38", "target": "74", "source_name": "summary additional listening", "target_name": "united states", "weight": 1.0, "year": 2013}, {"source": "38", "target": "80", "source_name": "summary additional listening", "target_name": "folk music", "weight": 1.0, "year": 2013}, {"source": "38", "target": "89", "source_name": "summary additional listening", "target_name": "electronic music", "weight": 1.0, "year": 2013}, {"source": "40", "target": "43", "source_name": "musical instruments", "target_name": "music education", "weight": 1.0, "year": 2013}, {"source": "40", "target": "49", "source_name": "musical instruments", "target_name": "music theory", "weight": 1.0, "year": 2013}, {"source": "40", "target": "52", "source_name": "musical instruments", "target_name": "folk song", "weight": 1.0, "year": 2013}, {"source": "40", "target": "53", "source_name": "musical instruments", "target_name": "popular music", "weight": 2.0, "year": 2013}, {"source": "40", "target": "54", "source_name": "musical instruments", "target_name": "american popular music", "weight": 2.0, "year": 2013}, {"source": "40", "target": "65", "source_name": "musical instruments", "target_name": "country music", "weight": 1.0, "year": 2013}, {"source": "40", "target": "69", "source_name": "musical instruments", "target_name": "classical music", "weight": 1.0, "year": 2013}, {"source": "40", "target": "70", "source_name": "musical instruments", "target_name": "world war", "weight": 1.0, "year": 2013}, {"source": "40", "target": "74", "source_name": "musical instruments", "target_name": "united states", "weight": 2.0, "year": 2013}, {"source": "40", "target": "75", "source_name": "musical instruments", "target_name": "world war ii", "weight": 1.0, "year": 2013}, {"source": "40", "target": "80", "source_name": "musical instruments", "target_name": "folk music", "weight": 1.0, "year": 2013}, {"source": "40", "target": "89", "source_name": "musical instruments", "target_name": "electronic music", "weight": 2.0, "year": 2013}, {"source": "41", "target": "47", "source_name": "youth culture", "target_name": "hard rock", "weight": 1.0, "year": 2013}, {"source": "41", "target": "48", "source_name": "youth culture", "target_name": "pop music", "weight": 4.0, "year": 2013}, {"source": "41", "target": "51", "source_name": "youth culture", "target_name": "cultural identity", "weight": 2.0, "year": 2013}, {"source": "41", "target": "53", "source_name": "youth culture", "target_name": "popular music", "weight": 6.0, "year": 2013}, {"source": "41", "target": "57", "source_name": "youth culture", "target_name": "north america", "weight": 1.0, "year": 2013}, {"source": "41", "target": "60", "source_name": "youth culture", "target_name": "cultural studies", "weight": 2.0, "year": 2013}, {"source": "41", "target": "61", "source_name": "youth culture", "target_name": "progressive rock", "weight": 1.0, "year": 2013}, {"source": "41", "target": "66", "source_name": "youth culture", "target_name": "hong kong", "weight": 1.0, "year": 2013}, {"source": "41", "target": "74", "source_name": "youth culture", "target_name": "united states", "weight": 2.0, "year": 2013}, {"source": "41", "target": "75", "source_name": "youth culture", "target_name": "world war ii", "weight": 1.0, "year": 2013}, {"source": "41", "target": "77", "source_name": "youth culture", "target_name": "rock music", "weight": 9.0, "year": 2013}, {"source": "41", "target": "80", "source_name": "youth culture", "target_name": "folk music", "weight": 1.0, "year": 2013}, {"source": "42", "target": "47", "source_name": "simon frith", "target_name": "hard rock", "weight": 1.0, "year": 2013}, {"source": "42", "target": "48", "source_name": "simon frith", "target_name": "pop music", "weight": 6.0, "year": 2013}, {"source": "42", "target": "49", "source_name": "simon frith", "target_name": "music theory", "weight": 1.0, "year": 2013}, {"source": "42", "target": "51", "source_name": "simon frith", "target_name": "cultural identity", "weight": 1.0, "year": 2013}, {"source": "42", "target": "53", "source_name": "simon frith", "target_name": "popular music", "weight": 6.0, "year": 2013}, {"source": "42", "target": "55", "source_name": "simon frith", "target_name": "rock criticism", "weight": 2.0, "year": 2013}, {"source": "42", "target": "56", "source_name": "simon frith", "target_name": "bruce springsteen", "weight": 1.0, "year": 2013}, {"source": "42", "target": "57", "source_name": "simon frith", "target_name": "north america", "weight": 1.0, "year": 2013}, {"source": "42", "target": "60", "source_name": "simon frith", "target_name": "cultural studies", "weight": 3.0, "year": 2013}, {"source": "42", "target": "61", "source_name": "simon frith", "target_name": "progressive rock", "weight": 1.0, "year": 2013}, {"source": "42", "target": "65", "source_name": "simon frith", "target_name": "country music", "weight": 1.0, "year": 2013}, {"source": "42", "target": "72", "source_name": "simon frith", "target_name": "jimi hendrix", "weight": 1.0, "year": 2013}, {"source": "42", "target": "76", "source_name": "simon frith", "target_name": "los angeles", "weight": 1.0, "year": 2013}, {"source": "42", "target": "77", "source_name": "simon frith", "target_name": "rock music", "weight": 5.0, "year": 2013}, {"source": "42", "target": "78", "source_name": "simon frith", "target_name": "hip hop", "weight": 1.0, "year": 2013}, {"source": "42", "target": "79", "source_name": "simon frith", "target_name": "popular culture", "weight": 2.0, "year": 2013}, {"source": "42", "target": "82", "source_name": "simon frith", "target_name": "heavy metal", "weight": 1.0, "year": 2013}, {"source": "42", "target": "88", "source_name": "simon frith", "target_name": "oxford university press", "weight": 1.0, "year": 2013}, {"source": "43", "target": "48", "source_name": "music education", "target_name": "pop music", "weight": 2.0, "year": 2013}, {"source": "43", "target": "49", "source_name": "music education", "target_name": "music theory", "weight": 3.0, "year": 2013}, {"source": "43", "target": "52", "source_name": "music education", "target_name": "folk song", "weight": 1.0, "year": 2013}, {"source": "43", "target": "53", "source_name": "music education", "target_name": "popular music", "weight": 6.0, "year": 2013}, {"source": "43", "target": "57", "source_name": "music education", "target_name": "north america", "weight": 1.0, "year": 2013}, {"source": "43", "target": "60", "source_name": "music education", "target_name": "cultural studies", "weight": 1.0, "year": 2013}, {"source": "43", "target": "66", "source_name": "music education", "target_name": "hong kong", "weight": 1.0, "year": 2013}, {"source": "43", "target": "69", "source_name": "music education", "target_name": "classical music", "weight": 3.0, "year": 2013}, {"source": "43", "target": "74", "source_name": "music education", "target_name": "united states", "weight": 1.0, "year": 2013}, {"source": "43", "target": "77", "source_name": "music education", "target_name": "rock music", "weight": 4.0, "year": 2013}, {"source": "43", "target": "80", "source_name": "music education", "target_name": "folk music", "weight": 6.0, "year": 2013}, {"source": "43", "target": "82", "source_name": "music education", "target_name": "heavy metal", "weight": 1.0, "year": 2013}, {"source": "44", "target": "47", "source_name": "alternative rock", "target_name": "hard rock", "weight": 1.0, "year": 2013}, {"source": "44", "target": "48", "source_name": "alternative rock", "target_name": "pop music", "weight": 1.0, "year": 2013}, {"source": "44", "target": "53", "source_name": "alternative rock", "target_name": "popular music", "weight": 9.0, "year": 2013}, {"source": "44", "target": "57", "source_name": "alternative rock", "target_name": "north america", "weight": 3.0, "year": 2013}, {"source": "44", "target": "61", "source_name": "alternative rock", "target_name": "progressive rock", "weight": 1.0, "year": 2013}, {"source": "44", "target": "65", "source_name": "alternative rock", "target_name": "country music", "weight": 2.0, "year": 2013}, {"source": "44", "target": "67", "source_name": "alternative rock", "target_name": "rock art", "weight": 1.0, "year": 2013}, {"source": "44", "target": "73", "source_name": "alternative rock", "target_name": "southern rock", "weight": 1.0, "year": 2013}, {"source": "44", "target": "74", "source_name": "alternative rock", "target_name": "united states", "weight": 2.0, "year": 2013}, {"source": "44", "target": "77", "source_name": "alternative rock", "target_name": "rock music", "weight": 6.0, "year": 2013}, {"source": "44", "target": "78", "source_name": "alternative rock", "target_name": "hip hop", "weight": 1.0, "year": 2013}, {"source": "44", "target": "80", "source_name": "alternative rock", "target_name": "folk music", "weight": 1.0, "year": 2013}, {"source": "45", "target": "77", "source_name": "double bass", "target_name": "rock music", "weight": 2.0, "year": 2013}, {"source": "46", "target": "48", "source_name": "music festival", "target_name": "pop music", "weight": 2.0, "year": 2013}, {"source": "46", "target": "53", "source_name": "music festival", "target_name": "popular music", "weight": 2.0, "year": 2013}, {"source": "46", "target": "61", "source_name": "music festival", "target_name": "progressive rock", "weight": 1.0, "year": 2013}, {"source": "46", "target": "66", "source_name": "music festival", "target_name": "hong kong", "weight": 1.0, "year": 2013}, {"source": "46", "target": "69", "source_name": "music festival", "target_name": "classical music", "weight": 3.0, "year": 2013}, {"source": "46", "target": "77", "source_name": "music festival", "target_name": "rock music", "weight": 3.0, "year": 2013}, {"source": "46", "target": "78", "source_name": "music festival", "target_name": "hip hop", "weight": 1.0, "year": 2013}, {"source": "46", "target": "80", "source_name": "music festival", "target_name": "folk music", "weight": 2.0, "year": 2013}, {"source": "46", "target": "85", "source_name": "music festival", "target_name": "jewish music", "weight": 1.0, "year": 2013}, {"source": "47", "target": "48", "source_name": "hard rock", "target_name": "pop music", "weight": 2.0, "year": 2013}, {"source": "47", "target": "53", "source_name": "hard rock", "target_name": "popular music", "weight": 5.0, "year": 2013}, {"source": "47", "target": "56", "source_name": "hard rock", "target_name": "bruce springsteen", "weight": 1.0, "year": 2013}, {"source": "47", "target": "57", "source_name": "hard rock", "target_name": "north america", "weight": 1.0, "year": 2013}, {"source": "47", "target": "59", "source_name": "hard rock", "target_name": "college students", "weight": 1.0, "year": 2013}, {"source": "47", "target": "61", "source_name": "hard rock", "target_name": "progressive rock", "weight": 2.0, "year": 2013}, {"source": "47", "target": "65", "source_name": "hard rock", "target_name": "country music", "weight": 1.0, "year": 2013}, {"source": "47", "target": "69", "source_name": "hard rock", "target_name": "classical music", "weight": 2.0, "year": 2013}, {"source": "47", "target": "74", "source_name": "hard rock", "target_name": "united states", "weight": 1.0, "year": 2013}, {"source": "47", "target": "77", "source_name": "hard rock", "target_name": "rock music", "weight": 12.0, "year": 2013}, {"source": "47", "target": "78", "source_name": "hard rock", "target_name": "hip hop", "weight": 1.0, "year": 2013}, {"source": "47", "target": "79", "source_name": "hard rock", "target_name": "popular culture", "weight": 2.0, "year": 2013}, {"source": "47", "target": "82", "source_name": "hard rock", "target_name": "heavy metal", "weight": 6.0, "year": 2013}, {"source": "47", "target": "83", "source_name": "hard rock", "target_name": "folk rock", "weight": 1.0, "year": 2013}, {"source": "47", "target": "89", "source_name": "hard rock", "target_name": "electronic music", "weight": 1.0, "year": 2013}, {"source": "48", "target": "49", "source_name": "pop music", "target_name": "music theory", "weight": 1.0, "year": 2013}, {"source": "48", "target": "51", "source_name": "pop music", "target_name": "cultural identity", "weight": 3.0, "year": 2013}, {"source": "48", "target": "52", "source_name": "pop music", "target_name": "folk song", "weight": 2.0, "year": 2013}, {"source": "48", "target": "53", "source_name": "pop music", "target_name": "popular music", "weight": 33.0, "year": 2013}, {"source": "48", "target": "55", "source_name": "pop music", "target_name": "rock criticism", "weight": 2.0, "year": 2013}, {"source": "48", "target": "57", "source_name": "pop music", "target_name": "north america", "weight": 2.0, "year": 2013}, {"source": "48", "target": "59", "source_name": "pop music", "target_name": "college students", "weight": 3.0, "year": 2013}, {"source": "48", "target": "60", "source_name": "pop music", "target_name": "cultural studies", "weight": 1.0, "year": 2013}, {"source": "48", "target": "62", "source_name": "pop music", "target_name": "led zeppelin", "weight": 2.0, "year": 2013}, {"source": "48", "target": "64", "source_name": "pop music", "target_name": "english language", "weight": 2.0, "year": 2013}, {"source": "48", "target": "65", "source_name": "pop music", "target_name": "country music", "weight": 2.0, "year": 2013}, {"source": "48", "target": "66", "source_name": "pop music", "target_name": "hong kong", "weight": 4.0, "year": 2013}, {"source": "48", "target": "67", "source_name": "pop music", "target_name": "rock art", "weight": 3.0, "year": 2013}, {"source": "48", "target": "69", "source_name": "pop music", "target_name": "classical music", "weight": 7.0, "year": 2013}, {"source": "48", "target": "70", "source_name": "pop music", "target_name": "world war", "weight": 2.0, "year": 2013}, {"source": "48", "target": "71", "source_name": "pop music", "target_name": "latin american", "weight": 1.0, "year": 2013}, {"source": "48", "target": "72", "source_name": "pop music", "target_name": "jimi hendrix", "weight": 3.0, "year": 2013}, {"source": "48", "target": "74", "source_name": "pop music", "target_name": "united states", "weight": 4.0, "year": 2013}, {"source": "48", "target": "76", "source_name": "pop music", "target_name": "los angeles", "weight": 1.0, "year": 2013}, {"source": "48", "target": "77", "source_name": "pop music", "target_name": "rock music", "weight": 34.0, "year": 2013}, {"source": "48", "target": "78", "source_name": "pop music", "target_name": "hip hop", "weight": 4.0, "year": 2013}, {"source": "48", "target": "79", "source_name": "pop music", "target_name": "popular culture", "weight": 5.0, "year": 2013}, {"source": "48", "target": "80", "source_name": "pop music", "target_name": "folk music", "weight": 6.0, "year": 2013}, {"source": "48", "target": "82", "source_name": "pop music", "target_name": "heavy metal", "weight": 2.0, "year": 2013}, {"source": "48", "target": "83", "source_name": "pop music", "target_name": "folk rock", "weight": 2.0, "year": 2013}, {"source": "48", "target": "87", "source_name": "pop music", "target_name": "music hall", "weight": 1.0, "year": 2013}, {"source": "49", "target": "53", "source_name": "music theory", "target_name": "popular music", "weight": 5.0, "year": 2013}, {"source": "49", "target": "54", "source_name": "music theory", "target_name": "american popular music", "weight": 1.0, "year": 2013}, {"source": "49", "target": "55", "source_name": "music theory", "target_name": "rock criticism", "weight": 1.0, "year": 2013}, {"source": "49", "target": "57", "source_name": "music theory", "target_name": "north america", "weight": 2.0, "year": 2013}, {"source": "49", "target": "61", "source_name": "music theory", "target_name": "progressive rock", "weight": 1.0, "year": 2013}, {"source": "49", "target": "69", "source_name": "music theory", "target_name": "classical music", "weight": 1.0, "year": 2013}, {"source": "49", "target": "72", "source_name": "music theory", "target_name": "jimi hendrix", "weight": 1.0, "year": 2013}, {"source": "49", "target": "77", "source_name": "music theory", "target_name": "rock music", "weight": 4.0, "year": 2013}, {"source": "49", "target": "78", "source_name": "music theory", "target_name": "hip hop", "weight": 1.0, "year": 2013}, {"source": "49", "target": "88", "source_name": "music theory", "target_name": "oxford university press", "weight": 2.0, "year": 2013}, {"source": "49", "target": "89", "source_name": "music theory", "target_name": "electronic music", "weight": 1.0, "year": 2013}, {"source": "50", "target": "53", "source_name": "hollywood film", "target_name": "popular music", "weight": 1.0, "year": 2013}, {"source": "50", "target": "60", "source_name": "hollywood film", "target_name": "cultural studies", "weight": 1.0, "year": 2013}, {"source": "50", "target": "79", "source_name": "hollywood film", "target_name": "popular culture", "weight": 1.0, "year": 2013}, {"source": "50", "target": "81", "source_name": "hollywood film", "target_name": "avant garde", "weight": 1.0, "year": 2013}, {"source": "50", "target": "88", "source_name": "hollywood film", "target_name": "oxford university press", "weight": 1.0, "year": 2013}, {"source": "51", "target": "52", "source_name": "cultural identity", "target_name": "folk song", "weight": 1.0, "year": 2013}, {"source": "51", "target": "53", "source_name": "cultural identity", "target_name": "popular music", "weight": 2.0, "year": 2013}, {"source": "51", "target": "60", "source_name": "cultural identity", "target_name": "cultural studies", "weight": 2.0, "year": 2013}, {"source": "51", "target": "65", "source_name": "cultural identity", "target_name": "country music", "weight": 1.0, "year": 2013}, {"source": "51", "target": "66", "source_name": "cultural identity", "target_name": "hong kong", "weight": 1.0, "year": 2013}, {"source": "51", "target": "72", "source_name": "cultural identity", "target_name": "jimi hendrix", "weight": 2.0, "year": 2013}, {"source": "51", "target": "74", "source_name": "cultural identity", "target_name": "united states", "weight": 2.0, "year": 2013}, {"source": "51", "target": "77", "source_name": "cultural identity", "target_name": "rock music", "weight": 6.0, "year": 2013}, {"source": "51", "target": "79", "source_name": "cultural identity", "target_name": "popular culture", "weight": 2.0, "year": 2013}, {"source": "51", "target": "80", "source_name": "cultural identity", "target_name": "folk music", "weight": 1.0, "year": 2013}, {"source": "52", "target": "53", "source_name": "folk song", "target_name": "popular music", "weight": 8.0, "year": 2013}, {"source": "52", "target": "54", "source_name": "folk song", "target_name": "american popular music", "weight": 2.0, "year": 2013}, {"source": "52", "target": "65", "source_name": "folk song", "target_name": "country music", "weight": 1.0, "year": 2013}, {"source": "52", "target": "66", "source_name": "folk song", "target_name": "hong kong", "weight": 1.0, "year": 2013}, {"source": "52", "target": "69", "source_name": "folk song", "target_name": "classical music", "weight": 2.0, "year": 2013}, {"source": "52", "target": "74", "source_name": "folk song", "target_name": "united states", "weight": 1.0, "year": 2013}, {"source": "52", "target": "77", "source_name": "folk song", "target_name": "rock music", "weight": 4.0, "year": 2013}, {"source": "52", "target": "80", "source_name": "folk song", "target_name": "folk music", "weight": 7.0, "year": 2013}, {"source": "52", "target": "87", "source_name": "folk song", "target_name": "music hall", "weight": 1.0, "year": 2013}, {"source": "52", "target": "89", "source_name": "folk song", "target_name": "electronic music", "weight": 1.0, "year": 2013}, {"source": "53", "target": "54", "source_name": "popular music", "target_name": "american popular music", "weight": 14.0, "year": 2013}, {"source": "53", "target": "55", "source_name": "popular music", "target_name": "rock criticism", "weight": 5.0, "year": 2013}, {"source": "53", "target": "56", "source_name": "popular music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2013}, {"source": "53", "target": "57", "source_name": "popular music", "target_name": "north america", "weight": 6.0, "year": 2013}, {"source": "53", "target": "58", "source_name": "popular music", "target_name": "music therapy", "weight": 1.0, "year": 2013}, {"source": "53", "target": "59", "source_name": "popular music", "target_name": "college students", "weight": 3.0, "year": 2013}, {"source": "53", "target": "60", "source_name": "popular music", "target_name": "cultural studies", "weight": 8.0, "year": 2013}, {"source": "53", "target": "61", "source_name": "popular music", "target_name": "progressive rock", "weight": 9.0, "year": 2013}, {"source": "53", "target": "62", "source_name": "popular music", "target_name": "led zeppelin", "weight": 2.0, "year": 2013}, {"source": "53", "target": "64", "source_name": "popular music", "target_name": "english language", "weight": 1.0, "year": 2013}, {"source": "53", "target": "65", "source_name": "popular music", "target_name": "country music", "weight": 11.0, "year": 2013}, {"source": "53", "target": "66", "source_name": "popular music", "target_name": "hong kong", "weight": 4.0, "year": 2013}, {"source": "53", "target": "67", "source_name": "popular music", "target_name": "rock art", "weight": 8.0, "year": 2013}, {"source": "53", "target": "69", "source_name": "popular music", "target_name": "classical music", "weight": 13.0, "year": 2013}, {"source": "53", "target": "70", "source_name": "popular music", "target_name": "world war", "weight": 6.0, "year": 2013}, {"source": "53", "target": "71", "source_name": "popular music", "target_name": "latin american", "weight": 2.0, "year": 2013}, {"source": "53", "target": "72", "source_name": "popular music", "target_name": "jimi hendrix", "weight": 5.0, "year": 2013}, {"source": "53", "target": "73", "source_name": "popular music", "target_name": "southern rock", "weight": 2.0, "year": 2013}, {"source": "53", "target": "74", "source_name": "popular music", "target_name": "united states", "weight": 20.0, "year": 2013}, {"source": "53", "target": "75", "source_name": "popular music", "target_name": "world war ii", "weight": 4.0, "year": 2013}, {"source": "53", "target": "76", "source_name": "popular music", "target_name": "los angeles", "weight": 6.0, "year": 2013}, {"source": "53", "target": "77", "source_name": "popular music", "target_name": "rock music", "weight": 114.0, "year": 2013}, {"source": "53", "target": "78", "source_name": "popular music", "target_name": "hip hop", "weight": 11.0, "year": 2013}, {"source": "53", "target": "79", "source_name": "popular music", "target_name": "popular culture", "weight": 23.0, "year": 2013}, {"source": "53", "target": "80", "source_name": "popular music", "target_name": "folk music", "weight": 18.0, "year": 2013}, {"source": "53", "target": "82", "source_name": "popular music", "target_name": "heavy metal", "weight": 11.0, "year": 2013}, {"source": "53", "target": "83", "source_name": "popular music", "target_name": "folk rock", "weight": 3.0, "year": 2013}, {"source": "53", "target": "85", "source_name": "popular music", "target_name": "jewish music", "weight": 2.0, "year": 2013}, {"source": "53", "target": "87", "source_name": "popular music", "target_name": "music hall", "weight": 4.0, "year": 2013}, {"source": "53", "target": "88", "source_name": "popular music", "target_name": "oxford university press", "weight": 4.0, "year": 2013}, {"source": "53", "target": "89", "source_name": "popular music", "target_name": "electronic music", "weight": 9.0, "year": 2013}, {"source": "53", "target": "90", "source_name": "popular music", "target_name": "blues rock", "weight": 1.0, "year": 2013}, {"source": "54", "target": "55", "source_name": "american popular music", "target_name": "rock criticism", "weight": 1.0, "year": 2013}, {"source": "54", "target": "65", "source_name": "american popular music", "target_name": "country music", "weight": 5.0, "year": 2013}, {"source": "54", "target": "69", "source_name": "american popular music", "target_name": "classical music", "weight": 3.0, "year": 2013}, {"source": "54", "target": "70", "source_name": "american popular music", "target_name": "world war", "weight": 1.0, "year": 2013}, {"source": "54", "target": "71", "source_name": "american popular music", "target_name": "latin american", "weight": 1.0, "year": 2013}, {"source": "54", "target": "74", "source_name": "american popular music", "target_name": "united states", "weight": 5.0, "year": 2013}, {"source": "54", "target": "75", "source_name": "american popular music", "target_name": "world war ii", "weight": 1.0, "year": 2013}, {"source": "54", "target": "76", "source_name": "american popular music", "target_name": "los angeles", "weight": 1.0, "year": 2013}, {"source": "54", "target": "77", "source_name": "american popular music", "target_name": "rock music", "weight": 3.0, "year": 2013}, {"source": "54", "target": "78", "source_name": "american popular music", "target_name": "hip hop", "weight": 2.0, "year": 2013}, {"source": "54", "target": "79", "source_name": "american popular music", "target_name": "popular culture", "weight": 1.0, "year": 2013}, {"source": "54", "target": "80", "source_name": "american popular music", "target_name": "folk music", "weight": 1.0, "year": 2013}, {"source": "54", "target": "88", "source_name": "american popular music", "target_name": "oxford university press", "weight": 1.0, "year": 2013}, {"source": "54", "target": "89", "source_name": "american popular music", "target_name": "electronic music", "weight": 1.0, "year": 2013}, {"source": "55", "target": "56", "source_name": "rock criticism", "target_name": "bruce springsteen", "weight": 1.0, "year": 2013}, {"source": "55", "target": "57", "source_name": "rock criticism", "target_name": "north america", "weight": 1.0, "year": 2013}, {"source": "55", "target": "61", "source_name": "rock criticism", "target_name": "progressive rock", "weight": 2.0, "year": 2013}, {"source": "55", "target": "65", "source_name": "rock criticism", "target_name": "country music", "weight": 1.0, "year": 2013}, {"source": "55", "target": "69", "source_name": "rock criticism", "target_name": "classical music", "weight": 1.0, "year": 2013}, {"source": "55", "target": "74", "source_name": "rock criticism", "target_name": "united states", "weight": 2.0, "year": 2013}, {"source": "55", "target": "77", "source_name": "rock criticism", "target_name": "rock music", "weight": 5.0, "year": 2013}, {"source": "55", "target": "78", "source_name": "rock criticism", "target_name": "hip hop", "weight": 1.0, "year": 2013}, {"source": "55", "target": "79", "source_name": "rock criticism", "target_name": "popular culture", "weight": 1.0, "year": 2013}, {"source": "55", "target": "88", "source_name": "rock criticism", "target_name": "oxford university press", "weight": 1.0, "year": 2013}, {"source": "56", "target": "72", "source_name": "bruce springsteen", "target_name": "jimi hendrix", "weight": 1.0, "year": 2013}, {"source": "56", "target": "77", "source_name": "bruce springsteen", "target_name": "rock music", "weight": 2.0, "year": 2013}, {"source": "56", "target": "78", "source_name": "bruce springsteen", "target_name": "hip hop", "weight": 1.0, "year": 2013}, {"source": "56", "target": "79", "source_name": "bruce springsteen", "target_name": "popular culture", "weight": 1.0, "year": 2013}, {"source": "56", "target": "82", "source_name": "bruce springsteen", "target_name": "heavy metal", "weight": 1.0, "year": 2013}, {"source": "57", "target": "61", "source_name": "north america", "target_name": "progressive rock", "weight": 1.0, "year": 2013}, {"source": "57", "target": "65", "source_name": "north america", "target_name": "country music", "weight": 2.0, "year": 2013}, {"source": "57", "target": "71", "source_name": "north america", "target_name": "latin american", "weight": 1.0, "year": 2013}, {"source": "57", "target": "73", "source_name": "north america", "target_name": "southern rock", "weight": 1.0, "year": 2013}, {"source": "57", "target": "74", "source_name": "north america", "target_name": "united states", "weight": 3.0, "year": 2013}, {"source": "57", "target": "77", "source_name": "north america", "target_name": "rock music", "weight": 5.0, "year": 2013}, {"source": "57", "target": "78", "source_name": "north america", "target_name": "hip hop", "weight": 1.0, "year": 2013}, {"source": "57", "target": "80", "source_name": "north america", "target_name": "folk music", "weight": 2.0, "year": 2013}, {"source": "58", "target": "64", "source_name": "music therapy", "target_name": "english language", "weight": 1.0, "year": 2013}, {"source": "58", "target": "77", "source_name": "music therapy", "target_name": "rock music", "weight": 3.0, "year": 2013}, {"source": "59", "target": "69", "source_name": "college students", "target_name": "classical music", "weight": 1.0, "year": 2013}, {"source": "59", "target": "74", "source_name": "college students", "target_name": "united states", "weight": 1.0, "year": 2013}, {"source": "59", "target": "77", "source_name": "college students", "target_name": "rock music", "weight": 5.0, "year": 2013}, {"source": "59", "target": "82", "source_name": "college students", "target_name": "heavy metal", "weight": 2.0, "year": 2013}, {"source": "60", "target": "62", "source_name": "cultural studies", "target_name": "led zeppelin", "weight": 1.0, "year": 2013}, {"source": "60", "target": "71", "source_name": "cultural studies", "target_name": "latin american", "weight": 1.0, "year": 2013}, {"source": "60", "target": "74", "source_name": "cultural studies", "target_name": "united states", "weight": 1.0, "year": 2013}, {"source": "60", "target": "76", "source_name": "cultural studies", "target_name": "los angeles", "weight": 1.0, "year": 2013}, {"source": "60", "target": "77", "source_name": "cultural studies", "target_name": "rock music", "weight": 7.0, "year": 2013}, {"source": "60", "target": "79", "source_name": "cultural studies", "target_name": "popular culture", "weight": 5.0, "year": 2013}, {"source": "60", "target": "80", "source_name": "cultural studies", "target_name": "folk music", "weight": 1.0, "year": 2013}, {"source": "60", "target": "81", "source_name": "cultural studies", "target_name": "avant garde", "weight": 1.0, "year": 2013}, {"source": "60", "target": "85", "source_name": "cultural studies", "target_name": "jewish music", "weight": 1.0, "year": 2013}, {"source": "60", "target": "87", "source_name": "cultural studies", "target_name": "music hall", "weight": 1.0, "year": 2013}, {"source": "60", "target": "88", "source_name": "cultural studies", "target_name": "oxford university press", "weight": 4.0, "year": 2013}, {"source": "60", "target": "89", "source_name": "cultural studies", "target_name": "electronic music", "weight": 1.0, "year": 2013}, {"source": "61", "target": "69", "source_name": "progressive rock", "target_name": "classical music", "weight": 2.0, "year": 2013}, {"source": "61", "target": "72", "source_name": "progressive rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2013}, {"source": "61", "target": "74", "source_name": "progressive rock", "target_name": "united states", "weight": 3.0, "year": 2013}, {"source": "61", "target": "77", "source_name": "progressive rock", "target_name": "rock music", "weight": 21.0, "year": 2013}, {"source": "61", "target": "80", "source_name": "progressive rock", "target_name": "folk music", "weight": 2.0, "year": 2013}, {"source": "61", "target": "82", "source_name": "progressive rock", "target_name": "heavy metal", "weight": 2.0, "year": 2013}, {"source": "61", "target": "83", "source_name": "progressive rock", "target_name": "folk rock", "weight": 1.0, "year": 2013}, {"source": "61", "target": "88", "source_name": "progressive rock", "target_name": "oxford university press", "weight": 1.0, "year": 2013}, {"source": "61", "target": "89", "source_name": "progressive rock", "target_name": "electronic music", "weight": 1.0, "year": 2013}, {"source": "62", "target": "67", "source_name": "led zeppelin", "target_name": "rock art", "weight": 1.0, "year": 2013}, {"source": "62", "target": "69", "source_name": "led zeppelin", "target_name": "classical music", "weight": 1.0, "year": 2013}, {"source": "62", "target": "77", "source_name": "led zeppelin", "target_name": "rock music", "weight": 2.0, "year": 2013}, {"source": "62", "target": "78", "source_name": "led zeppelin", "target_name": "hip hop", "weight": 1.0, "year": 2013}, {"source": "62", "target": "80", "source_name": "led zeppelin", "target_name": "folk music", "weight": 1.0, "year": 2013}, {"source": "62", "target": "82", "source_name": "led zeppelin", "target_name": "heavy metal", "weight": 1.0, "year": 2013}, {"source": "62", "target": "88", "source_name": "led zeppelin", "target_name": "oxford university press", "weight": 1.0, "year": 2013}, {"source": "64", "target": "66", "source_name": "english language", "target_name": "hong kong", "weight": 1.0, "year": 2013}, {"source": "64", "target": "67", "source_name": "english language", "target_name": "rock art", "weight": 1.0, "year": 2013}, {"source": "64", "target": "70", "source_name": "english language", "target_name": "world war", "weight": 1.0, "year": 2013}, {"source": "64", "target": "74", "source_name": "english language", "target_name": "united states", "weight": 1.0, "year": 2013}, {"source": "64", "target": "77", "source_name": "english language", "target_name": "rock music", "weight": 2.0, "year": 2013}, {"source": "64", "target": "79", "source_name": "english language", "target_name": "popular culture", "weight": 1.0, "year": 2013}, {"source": "64", "target": "83", "source_name": "english language", "target_name": "folk rock", "weight": 1.0, "year": 2013}, {"source": "65", "target": "69", "source_name": "country music", "target_name": "classical music", "weight": 4.0, "year": 2013}, {"source": "65", "target": "72", "source_name": "country music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2013}, {"source": "65", "target": "73", "source_name": "country music", "target_name": "southern rock", "weight": 2.0, "year": 2013}, {"source": "65", "target": "74", "source_name": "country music", "target_name": "united states", "weight": 3.0, "year": 2013}, {"source": "65", "target": "77", "source_name": "country music", "target_name": "rock music", "weight": 5.0, "year": 2013}, {"source": "65", "target": "78", "source_name": "country music", "target_name": "hip hop", "weight": 1.0, "year": 2013}, {"source": "65", "target": "79", "source_name": "country music", "target_name": "popular culture", "weight": 2.0, "year": 2013}, {"source": "65", "target": "80", "source_name": "country music", "target_name": "folk music", "weight": 3.0, "year": 2013}, {"source": "65", "target": "82", "source_name": "country music", "target_name": "heavy metal", "weight": 1.0, "year": 2013}, {"source": "65", "target": "89", "source_name": "country music", "target_name": "electronic music", "weight": 2.0, "year": 2013}, {"source": "66", "target": "67", "source_name": "hong kong", "target_name": "rock art", "weight": 1.0, "year": 2013}, {"source": "66", "target": "77", "source_name": "hong kong", "target_name": "rock music", "weight": 2.0, "year": 2013}, {"source": "66", "target": "78", "source_name": "hong kong", "target_name": "hip hop", "weight": 1.0, "year": 2013}, {"source": "66", "target": "80", "source_name": "hong kong", "target_name": "folk music", "weight": 1.0, "year": 2013}, {"source": "66", "target": "83", "source_name": "hong kong", "target_name": "folk rock", "weight": 1.0, "year": 2013}, {"source": "66", "target": "85", "source_name": "hong kong", "target_name": "jewish music", "weight": 1.0, "year": 2013}, {"source": "67", "target": "74", "source_name": "rock art", "target_name": "united states", "weight": 1.0, "year": 2013}, {"source": "67", "target": "77", "source_name": "rock art", "target_name": "rock music", "weight": 7.0, "year": 2013}, {"source": "67", "target": "79", "source_name": "rock art", "target_name": "popular culture", "weight": 1.0, "year": 2013}, {"source": "67", "target": "80", "source_name": "rock art", "target_name": "folk music", "weight": 1.0, "year": 2013}, {"source": "67", "target": "82", "source_name": "rock art", "target_name": "heavy metal", "weight": 1.0, "year": 2013}, {"source": "67", "target": "83", "source_name": "rock art", "target_name": "folk rock", "weight": 1.0, "year": 2013}, {"source": "67", "target": "89", "source_name": "rock art", "target_name": "electronic music", "weight": 1.0, "year": 2013}, {"source": "68", "target": "77", "source_name": "hearing loss", "target_name": "rock music", "weight": 3.0, "year": 2013}, {"source": "69", "target": "70", "source_name": "classical music", "target_name": "world war", "weight": 1.0, "year": 2013}, {"source": "69", "target": "71", "source_name": "classical music", "target_name": "latin american", "weight": 1.0, "year": 2013}, {"source": "69", "target": "72", "source_name": "classical music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2013}, {"source": "69", "target": "74", "source_name": "classical music", "target_name": "united states", "weight": 4.0, "year": 2013}, {"source": "69", "target": "76", "source_name": "classical music", "target_name": "los angeles", "weight": 1.0, "year": 2013}, {"source": "69", "target": "77", "source_name": "classical music", "target_name": "rock music", "weight": 33.0, "year": 2013}, {"source": "69", "target": "78", "source_name": "classical music", "target_name": "hip hop", "weight": 2.0, "year": 2013}, {"source": "69", "target": "79", "source_name": "classical music", "target_name": "popular culture", "weight": 2.0, "year": 2013}, {"source": "69", "target": "80", "source_name": "classical music", "target_name": "folk music", "weight": 5.0, "year": 2013}, {"source": "69", "target": "82", "source_name": "classical music", "target_name": "heavy metal", "weight": 3.0, "year": 2013}, {"source": "69", "target": "87", "source_name": "classical music", "target_name": "music hall", "weight": 2.0, "year": 2013}, {"source": "69", "target": "88", "source_name": "classical music", "target_name": "oxford university press", "weight": 1.0, "year": 2013}, {"source": "69", "target": "89", "source_name": "classical music", "target_name": "electronic music", "weight": 2.0, "year": 2013}, {"source": "70", "target": "74", "source_name": "world war", "target_name": "united states", "weight": 2.0, "year": 2013}, {"source": "70", "target": "75", "source_name": "world war", "target_name": "world war ii", "weight": 4.0, "year": 2013}, {"source": "70", "target": "77", "source_name": "world war", "target_name": "rock music", "weight": 6.0, "year": 2013}, {"source": "70", "target": "79", "source_name": "world war", "target_name": "popular culture", "weight": 1.0, "year": 2013}, {"source": "70", "target": "80", "source_name": "world war", "target_name": "folk music", "weight": 1.0, "year": 2013}, {"source": "70", "target": "87", "source_name": "world war", "target_name": "music hall", "weight": 1.0, "year": 2013}, {"source": "70", "target": "89", "source_name": "world war", "target_name": "electronic music", "weight": 1.0, "year": 2013}, {"source": "71", "target": "74", "source_name": "latin american", "target_name": "united states", "weight": 3.0, "year": 2013}, {"source": "71", "target": "76", "source_name": "latin american", "target_name": "los angeles", "weight": 2.0, "year": 2013}, {"source": "71", "target": "77", "source_name": "latin american", "target_name": "rock music", "weight": 4.0, "year": 2013}, {"source": "71", "target": "79", "source_name": "latin american", "target_name": "popular culture", "weight": 1.0, "year": 2013}, {"source": "72", "target": "74", "source_name": "jimi hendrix", "target_name": "united states", "weight": 1.0, "year": 2013}, {"source": "72", "target": "77", "source_name": "jimi hendrix", "target_name": "rock music", "weight": 7.0, "year": 2013}, {"source": "72", "target": "79", "source_name": "jimi hendrix", "target_name": "popular culture", "weight": 2.0, "year": 2013}, {"source": "72", "target": "80", "source_name": "jimi hendrix", "target_name": "folk music", "weight": 1.0, "year": 2013}, {"source": "72", "target": "89", "source_name": "jimi hendrix", "target_name": "electronic music", "weight": 1.0, "year": 2013}, {"source": "73", "target": "77", "source_name": "southern rock", "target_name": "rock music", "weight": 1.0, "year": 2013}, {"source": "73", "target": "80", "source_name": "southern rock", "target_name": "folk music", "weight": 1.0, "year": 2013}, {"source": "74", "target": "76", "source_name": "united states", "target_name": "los angeles", "weight": 1.0, "year": 2013}, {"source": "74", "target": "77", "source_name": "united states", "target_name": "rock music", "weight": 13.0, "year": 2013}, {"source": "74", "target": "78", "source_name": "united states", "target_name": "hip hop", "weight": 1.0, "year": 2013}, {"source": "74", "target": "79", "source_name": "united states", "target_name": "popular culture", "weight": 3.0, "year": 2013}, {"source": "74", "target": "80", "source_name": "united states", "target_name": "folk music", "weight": 4.0, "year": 2013}, {"source": "74", "target": "88", "source_name": "united states", "target_name": "oxford university press", "weight": 1.0, "year": 2013}, {"source": "74", "target": "89", "source_name": "united states", "target_name": "electronic music", "weight": 3.0, "year": 2013}, {"source": "75", "target": "76", "source_name": "world war ii", "target_name": "los angeles", "weight": 1.0, "year": 2013}, {"source": "75", "target": "77", "source_name": "world war ii", "target_name": "rock music", "weight": 3.0, "year": 2013}, {"source": "75", "target": "80", "source_name": "world war ii", "target_name": "folk music", "weight": 1.0, "year": 2013}, {"source": "76", "target": "77", "source_name": "los angeles", "target_name": "rock music", "weight": 7.0, "year": 2013}, {"source": "76", "target": "79", "source_name": "los angeles", "target_name": "popular culture", "weight": 1.0, "year": 2013}, {"source": "76", "target": "80", "source_name": "los angeles", "target_name": "folk music", "weight": 1.0, "year": 2013}, {"source": "77", "target": "78", "source_name": "rock music", "target_name": "hip hop", "weight": 4.0, "year": 2013}, {"source": "77", "target": "79", "source_name": "rock music", "target_name": "popular culture", "weight": 20.0, "year": 2013}, {"source": "77", "target": "80", "source_name": "rock music", "target_name": "folk music", "weight": 11.0, "year": 2013}, {"source": "77", "target": "82", "source_name": "rock music", "target_name": "heavy metal", "weight": 15.0, "year": 2013}, {"source": "77", "target": "83", "source_name": "rock music", "target_name": "folk rock", "weight": 2.0, "year": 2013}, {"source": "77", "target": "87", "source_name": "rock music", "target_name": "music hall", "weight": 4.0, "year": 2013}, {"source": "77", "target": "88", "source_name": "rock music", "target_name": "oxford university press", "weight": 2.0, "year": 2013}, {"source": "77", "target": "89", "source_name": "rock music", "target_name": "electronic music", "weight": 6.0, "year": 2013}, {"source": "78", "target": "79", "source_name": "hip hop", "target_name": "popular culture", "weight": 2.0, "year": 2013}, {"source": "78", "target": "80", "source_name": "hip hop", "target_name": "folk music", "weight": 3.0, "year": 2013}, {"source": "78", "target": "82", "source_name": "hip hop", "target_name": "heavy metal", "weight": 2.0, "year": 2013}, {"source": "78", "target": "85", "source_name": "hip hop", "target_name": "jewish music", "weight": 1.0, "year": 2013}, {"source": "78", "target": "88", "source_name": "hip hop", "target_name": "oxford university press", "weight": 1.0, "year": 2013}, {"source": "78", "target": "90", "source_name": "hip hop", "target_name": "blues rock", "weight": 1.0, "year": 2013}, {"source": "79", "target": "80", "source_name": "popular culture", "target_name": "folk music", "weight": 3.0, "year": 2013}, {"source": "79", "target": "82", "source_name": "popular culture", "target_name": "heavy metal", "weight": 2.0, "year": 2013}, {"source": "79", "target": "85", "source_name": "popular culture", "target_name": "jewish music", "weight": 1.0, "year": 2013}, {"source": "79", "target": "87", "source_name": "popular culture", "target_name": "music hall", "weight": 3.0, "year": 2013}, {"source": "79", "target": "88", "source_name": "popular culture", "target_name": "oxford university press", "weight": 1.0, "year": 2013}, {"source": "79", "target": "89", "source_name": "popular culture", "target_name": "electronic music", "weight": 1.0, "year": 2013}, {"source": "80", "target": "82", "source_name": "folk music", "target_name": "heavy metal", "weight": 1.0, "year": 2013}, {"source": "80", "target": "85", "source_name": "folk music", "target_name": "jewish music", "weight": 2.0, "year": 2013}, {"source": "80", "target": "87", "source_name": "folk music", "target_name": "music hall", "weight": 3.0, "year": 2013}, {"source": "80", "target": "88", "source_name": "folk music", "target_name": "oxford university press", "weight": 1.0, "year": 2013}, {"source": "80", "target": "89", "source_name": "folk music", "target_name": "electronic music", "weight": 3.0, "year": 2013}, {"source": "81", "target": "88", "source_name": "avant garde", "target_name": "oxford university press", "weight": 1.0, "year": 2013}, {"source": "82", "target": "83", "source_name": "heavy metal", "target_name": "folk rock", "weight": 2.0, "year": 2013}, {"source": "85", "target": "88", "source_name": "jewish music", "target_name": "oxford university press", "weight": 1.0, "year": 2013}, {"source": "88", "target": "89", "source_name": "oxford university press", "target_name": "electronic music", "weight": 1.0, "year": 2013}]}, {"2014": [{"source": "1", "target": "6", "source_name": "rock star", "target_name": "elvis presley", "weight": 1.0, "year": 2014}, {"source": "1", "target": "7", "source_name": "rock star", "target_name": "nineteenth century", "weight": 1.0, "year": 2014}, {"source": "1", "target": "9", "source_name": "rock star", "target_name": "compact disc", "weight": 1.0, "year": 2014}, {"source": "1", "target": "16", "source_name": "rock star", "target_name": "bob dylan", "weight": 1.0, "year": 2014}, {"source": "1", "target": "19", "source_name": "rock star", "target_name": "music video", "weight": 1.0, "year": 2014}, {"source": "1", "target": "28", "source_name": "rock star", "target_name": "high school", "weight": 1.0, "year": 2014}, {"source": "1", "target": "29", "source_name": "rock star", "target_name": "rolling stone", "weight": 2.0, "year": 2014}, {"source": "1", "target": "36", "source_name": "rock star", "target_name": "music industry", "weight": 3.0, "year": 2014}, {"source": "1", "target": "41", "source_name": "rock star", "target_name": "youth culture", "weight": 2.0, "year": 2014}, {"source": "1", "target": "42", "source_name": "rock star", "target_name": "simon frith", "weight": 1.0, "year": 2014}, {"source": "1", "target": "48", "source_name": "rock star", "target_name": "pop music", "weight": 4.0, "year": 2014}, {"source": "1", "target": "51", "source_name": "rock star", "target_name": "cultural identity", "weight": 1.0, "year": 2014}, {"source": "1", "target": "53", "source_name": "rock star", "target_name": "popular music", "weight": 5.0, "year": 2014}, {"source": "1", "target": "56", "source_name": "rock star", "target_name": "bruce springsteen", "weight": 1.0, "year": 2014}, {"source": "1", "target": "60", "source_name": "rock star", "target_name": "cultural studies", "weight": 1.0, "year": 2014}, {"source": "1", "target": "69", "source_name": "rock star", "target_name": "classical music", "weight": 1.0, "year": 2014}, {"source": "1", "target": "74", "source_name": "rock star", "target_name": "united states", "weight": 1.0, "year": 2014}, {"source": "1", "target": "77", "source_name": "rock star", "target_name": "rock music", "weight": 9.0, "year": 2014}, {"source": "1", "target": "79", "source_name": "rock star", "target_name": "popular culture", "weight": 2.0, "year": 2014}, {"source": "1", "target": "82", "source_name": "rock star", "target_name": "heavy metal", "weight": 2.0, "year": 2014}, {"source": "2", "target": "3", "source_name": "indie rock", "target_name": "glam rock", "weight": 1.0, "year": 2014}, {"source": "2", "target": "19", "source_name": "indie rock", "target_name": "music video", "weight": 1.0, "year": 2014}, {"source": "2", "target": "20", "source_name": "indie rock", "target_name": "garage rock", "weight": 1.0, "year": 2014}, {"source": "2", "target": "24", "source_name": "indie rock", "target_name": "punk rock", "weight": 1.0, "year": 2014}, {"source": "2", "target": "27", "source_name": "indie rock", "target_name": "pop rock", "weight": 1.0, "year": 2014}, {"source": "2", "target": "36", "source_name": "indie rock", "target_name": "music industry", "weight": 1.0, "year": 2014}, {"source": "2", "target": "44", "source_name": "indie rock", "target_name": "alternative rock", "weight": 1.0, "year": 2014}, {"source": "2", "target": "47", "source_name": "indie rock", "target_name": "hard rock", "weight": 1.0, "year": 2014}, {"source": "2", "target": "48", "source_name": "indie rock", "target_name": "pop music", "weight": 2.0, "year": 2014}, {"source": "2", "target": "51", "source_name": "indie rock", "target_name": "cultural identity", "weight": 1.0, "year": 2014}, {"source": "2", "target": "53", "source_name": "indie rock", "target_name": "popular music", "weight": 2.0, "year": 2014}, {"source": "2", "target": "67", "source_name": "indie rock", "target_name": "rock art", "weight": 1.0, "year": 2014}, {"source": "2", "target": "72", "source_name": "indie rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2014}, {"source": "2", "target": "74", "source_name": "indie rock", "target_name": "united states", "weight": 1.0, "year": 2014}, {"source": "2", "target": "77", "source_name": "indie rock", "target_name": "rock music", "weight": 5.0, "year": 2014}, {"source": "2", "target": "78", "source_name": "indie rock", "target_name": "hip hop", "weight": 1.0, "year": 2014}, {"source": "2", "target": "80", "source_name": "indie rock", "target_name": "folk music", "weight": 1.0, "year": 2014}, {"source": "3", "target": "20", "source_name": "glam rock", "target_name": "garage rock", "weight": 1.0, "year": 2014}, {"source": "3", "target": "24", "source_name": "glam rock", "target_name": "punk rock", "weight": 2.0, "year": 2014}, {"source": "3", "target": "27", "source_name": "glam rock", "target_name": "pop rock", "weight": 1.0, "year": 2014}, {"source": "3", "target": "41", "source_name": "glam rock", "target_name": "youth culture", "weight": 1.0, "year": 2014}, {"source": "3", "target": "44", "source_name": "glam rock", "target_name": "alternative rock", "weight": 1.0, "year": 2014}, {"source": "3", "target": "47", "source_name": "glam rock", "target_name": "hard rock", "weight": 1.0, "year": 2014}, {"source": "3", "target": "53", "source_name": "glam rock", "target_name": "popular music", "weight": 1.0, "year": 2014}, {"source": "3", "target": "77", "source_name": "glam rock", "target_name": "rock music", "weight": 2.0, "year": 2014}, {"source": "3", "target": "79", "source_name": "glam rock", "target_name": "popular culture", "weight": 2.0, "year": 2014}, {"source": "3", "target": "87", "source_name": "glam rock", "target_name": "music hall", "weight": 1.0, "year": 2014}, {"source": "4", "target": "7", "source_name": "gregorian chant", "target_name": "nineteenth century", "weight": 1.0, "year": 2014}, {"source": "4", "target": "9", "source_name": "gregorian chant", "target_name": "compact disc", "weight": 1.0, "year": 2014}, {"source": "4", "target": "10", "source_name": "gregorian chant", "target_name": "african american", "weight": 1.0, "year": 2014}, {"source": "4", "target": "19", "source_name": "gregorian chant", "target_name": "music video", "weight": 1.0, "year": 2014}, {"source": "4", "target": "22", "source_name": "gregorian chant", "target_name": "chamber music", "weight": 1.0, "year": 2014}, {"source": "4", "target": "36", "source_name": "gregorian chant", "target_name": "music industry", "weight": 1.0, "year": 2014}, {"source": "4", "target": "37", "source_name": "gregorian chant", "target_name": "middle ages", "weight": 1.0, "year": 2014}, {"source": "4", "target": "38", "source_name": "gregorian chant", "target_name": "summary additional listening", "weight": 1.0, "year": 2014}, {"source": "4", "target": "40", "source_name": "gregorian chant", "target_name": "musical instruments", "weight": 1.0, "year": 2014}, {"source": "4", "target": "48", "source_name": "gregorian chant", "target_name": "pop music", "weight": 1.0, "year": 2014}, {"source": "4", "target": "52", "source_name": "gregorian chant", "target_name": "folk song", "weight": 1.0, "year": 2014}, {"source": "4", "target": "53", "source_name": "gregorian chant", "target_name": "popular music", "weight": 1.0, "year": 2014}, {"source": "4", "target": "54", "source_name": "gregorian chant", "target_name": "american popular music", "weight": 1.0, "year": 2014}, {"source": "4", "target": "65", "source_name": "gregorian chant", "target_name": "country music", "weight": 1.0, "year": 2014}, {"source": "4", "target": "69", "source_name": "gregorian chant", "target_name": "classical music", "weight": 1.0, "year": 2014}, {"source": "4", "target": "74", "source_name": "gregorian chant", "target_name": "united states", "weight": 1.0, "year": 2014}, {"source": "4", "target": "80", "source_name": "gregorian chant", "target_name": "folk music", "weight": 1.0, "year": 2014}, {"source": "4", "target": "89", "source_name": "gregorian chant", "target_name": "electronic music", "weight": 1.0, "year": 2014}, {"source": "5", "target": "12", "source_name": "jesus christ superstar", "target_name": "rock opera", "weight": 3.0, "year": 2014}, {"source": "5", "target": "15", "source_name": "jesus christ superstar", "target_name": "musical theatre", "weight": 3.0, "year": 2014}, {"source": "5", "target": "33", "source_name": "jesus christ superstar", "target_name": "jesus christ", "weight": 5.0, "year": 2014}, {"source": "5", "target": "34", "source_name": "jesus christ superstar", "target_name": "mass media", "weight": 1.0, "year": 2014}, {"source": "5", "target": "41", "source_name": "jesus christ superstar", "target_name": "youth culture", "weight": 1.0, "year": 2014}, {"source": "5", "target": "53", "source_name": "jesus christ superstar", "target_name": "popular music", "weight": 1.0, "year": 2014}, {"source": "5", "target": "77", "source_name": "jesus christ superstar", "target_name": "rock music", "weight": 7.0, "year": 2014}, {"source": "6", "target": "10", "source_name": "elvis presley", "target_name": "african american", "weight": 1.0, "year": 2014}, {"source": "6", "target": "16", "source_name": "elvis presley", "target_name": "bob dylan", "weight": 4.0, "year": 2014}, {"source": "6", "target": "17", "source_name": "elvis presley", "target_name": "civil rights", "weight": 1.0, "year": 2014}, {"source": "6", "target": "23", "source_name": "elvis presley", "target_name": "electronic dance music", "weight": 1.0, "year": 2014}, {"source": "6", "target": "29", "source_name": "elvis presley", "target_name": "rolling stone", "weight": 2.0, "year": 2014}, {"source": "6", "target": "36", "source_name": "elvis presley", "target_name": "music industry", "weight": 3.0, "year": 2014}, {"source": "6", "target": "40", "source_name": "elvis presley", "target_name": "musical instruments", "weight": 1.0, "year": 2014}, {"source": "6", "target": "41", "source_name": "elvis presley", "target_name": "youth culture", "weight": 1.0, "year": 2014}, {"source": "6", "target": "42", "source_name": "elvis presley", "target_name": "simon frith", "weight": 2.0, "year": 2014}, {"source": "6", "target": "47", "source_name": "elvis presley", "target_name": "hard rock", "weight": 1.0, "year": 2014}, {"source": "6", "target": "48", "source_name": "elvis presley", "target_name": "pop music", "weight": 1.0, "year": 2014}, {"source": "6", "target": "49", "source_name": "elvis presley", "target_name": "music theory", "weight": 1.0, "year": 2014}, {"source": "6", "target": "51", "source_name": "elvis presley", "target_name": "cultural identity", "weight": 1.0, "year": 2014}, {"source": "6", "target": "53", "source_name": "elvis presley", "target_name": "popular music", "weight": 9.0, "year": 2014}, {"source": "6", "target": "54", "source_name": "elvis presley", "target_name": "american popular music", "weight": 3.0, "year": 2014}, {"source": "6", "target": "56", "source_name": "elvis presley", "target_name": "bruce springsteen", "weight": 2.0, "year": 2014}, {"source": "6", "target": "60", "source_name": "elvis presley", "target_name": "cultural studies", "weight": 1.0, "year": 2014}, {"source": "6", "target": "67", "source_name": "elvis presley", "target_name": "rock art", "weight": 1.0, "year": 2014}, {"source": "6", "target": "70", "source_name": "elvis presley", "target_name": "world war", "weight": 1.0, "year": 2014}, {"source": "6", "target": "72", "source_name": "elvis presley", "target_name": "jimi hendrix", "weight": 1.0, "year": 2014}, {"source": "6", "target": "74", "source_name": "elvis presley", "target_name": "united states", "weight": 2.0, "year": 2014}, {"source": "6", "target": "75", "source_name": "elvis presley", "target_name": "world war ii", "weight": 1.0, "year": 2014}, {"source": "6", "target": "77", "source_name": "elvis presley", "target_name": "rock music", "weight": 5.0, "year": 2014}, {"source": "6", "target": "78", "source_name": "elvis presley", "target_name": "hip hop", "weight": 1.0, "year": 2014}, {"source": "6", "target": "79", "source_name": "elvis presley", "target_name": "popular culture", "weight": 2.0, "year": 2014}, {"source": "6", "target": "80", "source_name": "elvis presley", "target_name": "folk music", "weight": 1.0, "year": 2014}, {"source": "6", "target": "82", "source_name": "elvis presley", "target_name": "heavy metal", "weight": 1.0, "year": 2014}, {"source": "7", "target": "9", "source_name": "nineteenth century", "target_name": "compact disc", "weight": 1.0, "year": 2014}, {"source": "7", "target": "10", "source_name": "nineteenth century", "target_name": "african american", "weight": 1.0, "year": 2014}, {"source": "7", "target": "19", "source_name": "nineteenth century", "target_name": "music video", "weight": 1.0, "year": 2014}, {"source": "7", "target": "22", "source_name": "nineteenth century", "target_name": "chamber music", "weight": 1.0, "year": 2014}, {"source": "7", "target": "34", "source_name": "nineteenth century", "target_name": "mass media", "weight": 1.0, "year": 2014}, {"source": "7", "target": "36", "source_name": "nineteenth century", "target_name": "music industry", "weight": 2.0, "year": 2014}, {"source": "7", "target": "38", "source_name": "nineteenth century", "target_name": "summary additional listening", "weight": 1.0, "year": 2014}, {"source": "7", "target": "40", "source_name": "nineteenth century", "target_name": "musical instruments", "weight": 1.0, "year": 2014}, {"source": "7", "target": "43", "source_name": "nineteenth century", "target_name": "music education", "weight": 1.0, "year": 2014}, {"source": "7", "target": "45", "source_name": "nineteenth century", "target_name": "double bass", "weight": 2.0, "year": 2014}, {"source": "7", "target": "48", "source_name": "nineteenth century", "target_name": "pop music", "weight": 1.0, "year": 2014}, {"source": "7", "target": "50", "source_name": "nineteenth century", "target_name": "hollywood film", "weight": 1.0, "year": 2014}, {"source": "7", "target": "52", "source_name": "nineteenth century", "target_name": "folk song", "weight": 3.0, "year": 2014}, {"source": "7", "target": "53", "source_name": "nineteenth century", "target_name": "popular music", "weight": 4.0, "year": 2014}, {"source": "7", "target": "54", "source_name": "nineteenth century", "target_name": "american popular music", "weight": 1.0, "year": 2014}, {"source": "7", "target": "65", "source_name": "nineteenth century", "target_name": "country music", "weight": 1.0, "year": 2014}, {"source": "7", "target": "67", "source_name": "nineteenth century", "target_name": "rock art", "weight": 1.0, "year": 2014}, {"source": "7", "target": "69", "source_name": "nineteenth century", "target_name": "classical music", "weight": 4.0, "year": 2014}, {"source": "7", "target": "70", "source_name": "nineteenth century", "target_name": "world war", "weight": 2.0, "year": 2014}, {"source": "7", "target": "74", "source_name": "nineteenth century", "target_name": "united states", "weight": 2.0, "year": 2014}, {"source": "7", "target": "77", "source_name": "nineteenth century", "target_name": "rock music", "weight": 4.0, "year": 2014}, {"source": "7", "target": "79", "source_name": "nineteenth century", "target_name": "popular culture", "weight": 1.0, "year": 2014}, {"source": "7", "target": "80", "source_name": "nineteenth century", "target_name": "folk music", "weight": 3.0, "year": 2014}, {"source": "7", "target": "85", "source_name": "nineteenth century", "target_name": "jewish music", "weight": 1.0, "year": 2014}, {"source": "7", "target": "87", "source_name": "nineteenth century", "target_name": "music hall", "weight": 1.0, "year": 2014}, {"source": "7", "target": "89", "source_name": "nineteenth century", "target_name": "electronic music", "weight": 1.0, "year": 2014}, {"source": "8", "target": "20", "source_name": "christian rock", "target_name": "garage rock", "weight": 1.0, "year": 2014}, {"source": "8", "target": "36", "source_name": "christian rock", "target_name": "music industry", "weight": 1.0, "year": 2014}, {"source": "8", "target": "44", "source_name": "christian rock", "target_name": "alternative rock", "weight": 1.0, "year": 2014}, {"source": "8", "target": "53", "source_name": "christian rock", "target_name": "popular music", "weight": 2.0, "year": 2014}, {"source": "8", "target": "57", "source_name": "christian rock", "target_name": "north america", "weight": 1.0, "year": 2014}, {"source": "8", "target": "65", "source_name": "christian rock", "target_name": "country music", "weight": 1.0, "year": 2014}, {"source": "8", "target": "73", "source_name": "christian rock", "target_name": "southern rock", "weight": 1.0, "year": 2014}, {"source": "8", "target": "77", "source_name": "christian rock", "target_name": "rock music", "weight": 1.0, "year": 2014}, {"source": "8", "target": "79", "source_name": "christian rock", "target_name": "popular culture", "weight": 1.0, "year": 2014}, {"source": "8", "target": "80", "source_name": "christian rock", "target_name": "folk music", "weight": 1.0, "year": 2014}, {"source": "9", "target": "10", "source_name": "compact disc", "target_name": "african american", "weight": 1.0, "year": 2014}, {"source": "9", "target": "11", "source_name": "compact disc", "target_name": "south africa", "weight": 1.0, "year": 2014}, {"source": "9", "target": "18", "source_name": "compact disc", "target_name": "middle class", "weight": 1.0, "year": 2014}, {"source": "9", "target": "19", "source_name": "compact disc", "target_name": "music video", "weight": 1.0, "year": 2014}, {"source": "9", "target": "24", "source_name": "compact disc", "target_name": "punk rock", "weight": 1.0, "year": 2014}, {"source": "9", "target": "25", "source_name": "compact disc", "target_name": "russian rock", "weight": 1.0, "year": 2014}, {"source": "9", "target": "28", "source_name": "compact disc", "target_name": "high school", "weight": 1.0, "year": 2014}, {"source": "9", "target": "29", "source_name": "compact disc", "target_name": "rolling stone", "weight": 1.0, "year": 2014}, {"source": "9", "target": "30", "source_name": "compact disc", "target_name": "rock band", "weight": 1.0, "year": 2014}, {"source": "9", "target": "36", "source_name": "compact disc", "target_name": "music industry", "weight": 1.0, "year": 2014}, {"source": "9", "target": "37", "source_name": "compact disc", "target_name": "middle ages", "weight": 1.0, "year": 2014}, {"source": "9", "target": "46", "source_name": "compact disc", "target_name": "music festival", "weight": 1.0, "year": 2014}, {"source": "9", "target": "48", "source_name": "compact disc", "target_name": "pop music", "weight": 1.0, "year": 2014}, {"source": "9", "target": "53", "source_name": "compact disc", "target_name": "popular music", "weight": 4.0, "year": 2014}, {"source": "9", "target": "61", "source_name": "compact disc", "target_name": "progressive rock", "weight": 1.0, "year": 2014}, {"source": "9", "target": "66", "source_name": "compact disc", "target_name": "hong kong", "weight": 1.0, "year": 2014}, {"source": "9", "target": "74", "source_name": "compact disc", "target_name": "united states", "weight": 1.0, "year": 2014}, {"source": "9", "target": "77", "source_name": "compact disc", "target_name": "rock music", "weight": 2.0, "year": 2014}, {"source": "9", "target": "78", "source_name": "compact disc", "target_name": "hip hop", "weight": 1.0, "year": 2014}, {"source": "9", "target": "79", "source_name": "compact disc", "target_name": "popular culture", "weight": 1.0, "year": 2014}, {"source": "9", "target": "80", "source_name": "compact disc", "target_name": "folk music", "weight": 3.0, "year": 2014}, {"source": "9", "target": "85", "source_name": "compact disc", "target_name": "jewish music", "weight": 2.0, "year": 2014}, {"source": "9", "target": "89", "source_name": "compact disc", "target_name": "electronic music", "weight": 1.0, "year": 2014}, {"source": "10", "target": "11", "source_name": "african american", "target_name": "south africa", "weight": 1.0, "year": 2014}, {"source": "10", "target": "15", "source_name": "african american", "target_name": "musical theatre", "weight": 1.0, "year": 2014}, {"source": "10", "target": "17", "source_name": "african american", "target_name": "civil rights", "weight": 2.0, "year": 2014}, {"source": "10", "target": "19", "source_name": "african american", "target_name": "music video", "weight": 1.0, "year": 2014}, {"source": "10", "target": "21", "source_name": "african american", "target_name": "social protest", "weight": 1.0, "year": 2014}, {"source": "10", "target": "22", "source_name": "african american", "target_name": "chamber music", "weight": 1.0, "year": 2014}, {"source": "10", "target": "23", "source_name": "african american", "target_name": "electronic dance music", "weight": 1.0, "year": 2014}, {"source": "10", "target": "24", "source_name": "african american", "target_name": "punk rock", "weight": 2.0, "year": 2014}, {"source": "10", "target": "36", "source_name": "african american", "target_name": "music industry", "weight": 2.0, "year": 2014}, {"source": "10", "target": "38", "source_name": "african american", "target_name": "summary additional listening", "weight": 1.0, "year": 2014}, {"source": "10", "target": "40", "source_name": "african american", "target_name": "musical instruments", "weight": 1.0, "year": 2014}, {"source": "10", "target": "52", "source_name": "african american", "target_name": "folk song", "weight": 1.0, "year": 2014}, {"source": "10", "target": "53", "source_name": "african american", "target_name": "popular music", "weight": 7.0, "year": 2014}, {"source": "10", "target": "54", "source_name": "african american", "target_name": "american popular music", "weight": 1.0, "year": 2014}, {"source": "10", "target": "61", "source_name": "african american", "target_name": "progressive rock", "weight": 1.0, "year": 2014}, {"source": "10", "target": "65", "source_name": "african american", "target_name": "country music", "weight": 1.0, "year": 2014}, {"source": "10", "target": "69", "source_name": "african american", "target_name": "classical music", "weight": 1.0, "year": 2014}, {"source": "10", "target": "74", "source_name": "african american", "target_name": "united states", "weight": 5.0, "year": 2014}, {"source": "10", "target": "75", "source_name": "african american", "target_name": "world war ii", "weight": 1.0, "year": 2014}, {"source": "10", "target": "77", "source_name": "african american", "target_name": "rock music", "weight": 2.0, "year": 2014}, {"source": "10", "target": "78", "source_name": "african american", "target_name": "hip hop", "weight": 1.0, "year": 2014}, {"source": "10", "target": "79", "source_name": "african american", "target_name": "popular culture", "weight": 2.0, "year": 2014}, {"source": "10", "target": "80", "source_name": "african american", "target_name": "folk music", "weight": 4.0, "year": 2014}, {"source": "10", "target": "82", "source_name": "african american", "target_name": "heavy metal", "weight": 1.0, "year": 2014}, {"source": "10", "target": "89", "source_name": "african american", "target_name": "electronic music", "weight": 1.0, "year": 2014}, {"source": "11", "target": "17", "source_name": "south africa", "target_name": "civil rights", "weight": 1.0, "year": 2014}, {"source": "11", "target": "21", "source_name": "south africa", "target_name": "social protest", "weight": 2.0, "year": 2014}, {"source": "11", "target": "23", "source_name": "south africa", "target_name": "electronic dance music", "weight": 1.0, "year": 2014}, {"source": "11", "target": "25", "source_name": "south africa", "target_name": "russian rock", "weight": 1.0, "year": 2014}, {"source": "11", "target": "36", "source_name": "south africa", "target_name": "music industry", "weight": 1.0, "year": 2014}, {"source": "11", "target": "43", "source_name": "south africa", "target_name": "music education", "weight": 1.0, "year": 2014}, {"source": "11", "target": "46", "source_name": "south africa", "target_name": "music festival", "weight": 3.0, "year": 2014}, {"source": "11", "target": "53", "source_name": "south africa", "target_name": "popular music", "weight": 4.0, "year": 2014}, {"source": "11", "target": "61", "source_name": "south africa", "target_name": "progressive rock", "weight": 1.0, "year": 2014}, {"source": "11", "target": "66", "source_name": "south africa", "target_name": "hong kong", "weight": 1.0, "year": 2014}, {"source": "11", "target": "74", "source_name": "south africa", "target_name": "united states", "weight": 3.0, "year": 2014}, {"source": "11", "target": "78", "source_name": "south africa", "target_name": "hip hop", "weight": 1.0, "year": 2014}, {"source": "11", "target": "80", "source_name": "south africa", "target_name": "folk music", "weight": 3.0, "year": 2014}, {"source": "11", "target": "85", "source_name": "south africa", "target_name": "jewish music", "weight": 1.0, "year": 2014}, {"source": "11", "target": "87", "source_name": "south africa", "target_name": "music hall", "weight": 1.0, "year": 2014}, {"source": "11", "target": "88", "source_name": "south africa", "target_name": "oxford university press", "weight": 1.0, "year": 2014}, {"source": "12", "target": "15", "source_name": "rock opera", "target_name": "musical theatre", "weight": 3.0, "year": 2014}, {"source": "12", "target": "33", "source_name": "rock opera", "target_name": "jesus christ", "weight": 2.0, "year": 2014}, {"source": "12", "target": "41", "source_name": "rock opera", "target_name": "youth culture", "weight": 1.0, "year": 2014}, {"source": "12", "target": "53", "source_name": "rock opera", "target_name": "popular music", "weight": 1.0, "year": 2014}, {"source": "12", "target": "57", "source_name": "rock opera", "target_name": "north america", "weight": 1.0, "year": 2014}, {"source": "12", "target": "77", "source_name": "rock opera", "target_name": "rock music", "weight": 2.0, "year": 2014}, {"source": "12", "target": "79", "source_name": "rock opera", "target_name": "popular culture", "weight": 1.0, "year": 2014}, {"source": "15", "target": "33", "source_name": "musical theatre", "target_name": "jesus christ", "weight": 3.0, "year": 2014}, {"source": "15", "target": "53", "source_name": "musical theatre", "target_name": "popular music", "weight": 4.0, "year": 2014}, {"source": "15", "target": "54", "source_name": "musical theatre", "target_name": "american popular music", "weight": 3.0, "year": 2014}, {"source": "15", "target": "57", "source_name": "musical theatre", "target_name": "north america", "weight": 2.0, "year": 2014}, {"source": "15", "target": "70", "source_name": "musical theatre", "target_name": "world war", "weight": 1.0, "year": 2014}, {"source": "15", "target": "74", "source_name": "musical theatre", "target_name": "united states", "weight": 1.0, "year": 2014}, {"source": "15", "target": "77", "source_name": "musical theatre", "target_name": "rock music", "weight": 7.0, "year": 2014}, {"source": "15", "target": "87", "source_name": "musical theatre", "target_name": "music hall", "weight": 1.0, "year": 2014}, {"source": "16", "target": "29", "source_name": "bob dylan", "target_name": "rolling stone", "weight": 3.0, "year": 2014}, {"source": "16", "target": "30", "source_name": "bob dylan", "target_name": "rock band", "weight": 2.0, "year": 2014}, {"source": "16", "target": "36", "source_name": "bob dylan", "target_name": "music industry", "weight": 2.0, "year": 2014}, {"source": "16", "target": "42", "source_name": "bob dylan", "target_name": "simon frith", "weight": 1.0, "year": 2014}, {"source": "16", "target": "48", "source_name": "bob dylan", "target_name": "pop music", "weight": 3.0, "year": 2014}, {"source": "16", "target": "52", "source_name": "bob dylan", "target_name": "folk song", "weight": 1.0, "year": 2014}, {"source": "16", "target": "53", "source_name": "bob dylan", "target_name": "popular music", "weight": 10.0, "year": 2014}, {"source": "16", "target": "54", "source_name": "bob dylan", "target_name": "american popular music", "weight": 1.0, "year": 2014}, {"source": "16", "target": "56", "source_name": "bob dylan", "target_name": "bruce springsteen", "weight": 1.0, "year": 2014}, {"source": "16", "target": "69", "source_name": "bob dylan", "target_name": "classical music", "weight": 1.0, "year": 2014}, {"source": "16", "target": "70", "source_name": "bob dylan", "target_name": "world war", "weight": 1.0, "year": 2014}, {"source": "16", "target": "72", "source_name": "bob dylan", "target_name": "jimi hendrix", "weight": 2.0, "year": 2014}, {"source": "16", "target": "75", "source_name": "bob dylan", "target_name": "world war ii", "weight": 1.0, "year": 2014}, {"source": "16", "target": "77", "source_name": "bob dylan", "target_name": "rock music", "weight": 6.0, "year": 2014}, {"source": "16", "target": "79", "source_name": "bob dylan", "target_name": "popular culture", "weight": 2.0, "year": 2014}, {"source": "16", "target": "80", "source_name": "bob dylan", "target_name": "folk music", "weight": 5.0, "year": 2014}, {"source": "17", "target": "21", "source_name": "civil rights", "target_name": "social protest", "weight": 1.0, "year": 2014}, {"source": "17", "target": "30", "source_name": "civil rights", "target_name": "rock band", "weight": 1.0, "year": 2014}, {"source": "17", "target": "41", "source_name": "civil rights", "target_name": "youth culture", "weight": 1.0, "year": 2014}, {"source": "17", "target": "53", "source_name": "civil rights", "target_name": "popular music", "weight": 4.0, "year": 2014}, {"source": "17", "target": "54", "source_name": "civil rights", "target_name": "american popular music", "weight": 1.0, "year": 2014}, {"source": "17", "target": "61", "source_name": "civil rights", "target_name": "progressive rock", "weight": 1.0, "year": 2014}, {"source": "17", "target": "70", "source_name": "civil rights", "target_name": "world war", "weight": 1.0, "year": 2014}, {"source": "17", "target": "73", "source_name": "civil rights", "target_name": "southern rock", "weight": 1.0, "year": 2014}, {"source": "17", "target": "74", "source_name": "civil rights", "target_name": "united states", "weight": 3.0, "year": 2014}, {"source": "17", "target": "75", "source_name": "civil rights", "target_name": "world war ii", "weight": 1.0, "year": 2014}, {"source": "17", "target": "77", "source_name": "civil rights", "target_name": "rock music", "weight": 3.0, "year": 2014}, {"source": "17", "target": "79", "source_name": "civil rights", "target_name": "popular culture", "weight": 1.0, "year": 2014}, {"source": "17", "target": "80", "source_name": "civil rights", "target_name": "folk music", "weight": 2.0, "year": 2014}, {"source": "18", "target": "19", "source_name": "middle class", "target_name": "music video", "weight": 1.0, "year": 2014}, {"source": "18", "target": "28", "source_name": "middle class", "target_name": "high school", "weight": 1.0, "year": 2014}, {"source": "18", "target": "30", "source_name": "middle class", "target_name": "rock band", "weight": 2.0, "year": 2014}, {"source": "18", "target": "53", "source_name": "middle class", "target_name": "popular music", "weight": 1.0, "year": 2014}, {"source": "18", "target": "61", "source_name": "middle class", "target_name": "progressive rock", "weight": 2.0, "year": 2014}, {"source": "18", "target": "77", "source_name": "middle class", "target_name": "rock music", "weight": 2.0, "year": 2014}, {"source": "19", "target": "22", "source_name": "music video", "target_name": "chamber music", "weight": 1.0, "year": 2014}, {"source": "19", "target": "28", "source_name": "music video", "target_name": "high school", "weight": 1.0, "year": 2014}, {"source": "19", "target": "30", "source_name": "music video", "target_name": "rock band", "weight": 3.0, "year": 2014}, {"source": "19", "target": "36", "source_name": "music video", "target_name": "music industry", "weight": 2.0, "year": 2014}, {"source": "19", "target": "38", "source_name": "music video", "target_name": "summary additional listening", "weight": 1.0, "year": 2014}, {"source": "19", "target": "40", "source_name": "music video", "target_name": "musical instruments", "weight": 1.0, "year": 2014}, {"source": "19", "target": "47", "source_name": "music video", "target_name": "hard rock", "weight": 1.0, "year": 2014}, {"source": "19", "target": "48", "source_name": "music video", "target_name": "pop music", "weight": 3.0, "year": 2014}, {"source": "19", "target": "49", "source_name": "music video", "target_name": "music theory", "weight": 1.0, "year": 2014}, {"source": "19", "target": "51", "source_name": "music video", "target_name": "cultural identity", "weight": 2.0, "year": 2014}, {"source": "19", "target": "52", "source_name": "music video", "target_name": "folk song", "weight": 1.0, "year": 2014}, {"source": "19", "target": "53", "source_name": "music video", "target_name": "popular music", "weight": 8.0, "year": 2014}, {"source": "19", "target": "54", "source_name": "music video", "target_name": "american popular music", "weight": 1.0, "year": 2014}, {"source": "19", "target": "61", "source_name": "music video", "target_name": "progressive rock", "weight": 1.0, "year": 2014}, {"source": "19", "target": "65", "source_name": "music video", "target_name": "country music", "weight": 4.0, "year": 2014}, {"source": "19", "target": "69", "source_name": "music video", "target_name": "classical music", "weight": 1.0, "year": 2014}, {"source": "19", "target": "72", "source_name": "music video", "target_name": "jimi hendrix", "weight": 1.0, "year": 2014}, {"source": "19", "target": "74", "source_name": "music video", "target_name": "united states", "weight": 2.0, "year": 2014}, {"source": "19", "target": "76", "source_name": "music video", "target_name": "los angeles", "weight": 1.0, "year": 2014}, {"source": "19", "target": "77", "source_name": "music video", "target_name": "rock music", "weight": 9.0, "year": 2014}, {"source": "19", "target": "78", "source_name": "music video", "target_name": "hip hop", "weight": 2.0, "year": 2014}, {"source": "19", "target": "80", "source_name": "music video", "target_name": "folk music", "weight": 1.0, "year": 2014}, {"source": "19", "target": "82", "source_name": "music video", "target_name": "heavy metal", "weight": 1.0, "year": 2014}, {"source": "19", "target": "89", "source_name": "music video", "target_name": "electronic music", "weight": 1.0, "year": 2014}, {"source": "19", "target": "90", "source_name": "music video", "target_name": "blues rock", "weight": 1.0, "year": 2014}, {"source": "20", "target": "24", "source_name": "garage rock", "target_name": "punk rock", "weight": 1.0, "year": 2014}, {"source": "20", "target": "27", "source_name": "garage rock", "target_name": "pop rock", "weight": 1.0, "year": 2014}, {"source": "20", "target": "29", "source_name": "garage rock", "target_name": "rolling stone", "weight": 1.0, "year": 2014}, {"source": "20", "target": "30", "source_name": "garage rock", "target_name": "rock band", "weight": 2.0, "year": 2014}, {"source": "20", "target": "43", "source_name": "garage rock", "target_name": "music education", "weight": 1.0, "year": 2014}, {"source": "20", "target": "44", "source_name": "garage rock", "target_name": "alternative rock", "weight": 2.0, "year": 2014}, {"source": "20", "target": "47", "source_name": "garage rock", "target_name": "hard rock", "weight": 1.0, "year": 2014}, {"source": "20", "target": "48", "source_name": "garage rock", "target_name": "pop music", "weight": 1.0, "year": 2014}, {"source": "20", "target": "53", "source_name": "garage rock", "target_name": "popular music", "weight": 4.0, "year": 2014}, {"source": "20", "target": "57", "source_name": "garage rock", "target_name": "north america", "weight": 1.0, "year": 2014}, {"source": "20", "target": "65", "source_name": "garage rock", "target_name": "country music", "weight": 1.0, "year": 2014}, {"source": "20", "target": "73", "source_name": "garage rock", "target_name": "southern rock", "weight": 1.0, "year": 2014}, {"source": "20", "target": "77", "source_name": "garage rock", "target_name": "rock music", "weight": 4.0, "year": 2014}, {"source": "20", "target": "80", "source_name": "garage rock", "target_name": "folk music", "weight": 1.0, "year": 2014}, {"source": "21", "target": "47", "source_name": "social protest", "target_name": "hard rock", "weight": 1.0, "year": 2014}, {"source": "21", "target": "48", "source_name": "social protest", "target_name": "pop music", "weight": 1.0, "year": 2014}, {"source": "21", "target": "53", "source_name": "social protest", "target_name": "popular music", "weight": 4.0, "year": 2014}, {"source": "21", "target": "57", "source_name": "social protest", "target_name": "north america", "weight": 2.0, "year": 2014}, {"source": "21", "target": "61", "source_name": "social protest", "target_name": "progressive rock", "weight": 1.0, "year": 2014}, {"source": "21", "target": "71", "source_name": "social protest", "target_name": "latin american", "weight": 1.0, "year": 2014}, {"source": "21", "target": "74", "source_name": "social protest", "target_name": "united states", "weight": 2.0, "year": 2014}, {"source": "21", "target": "77", "source_name": "social protest", "target_name": "rock music", "weight": 1.0, "year": 2014}, {"source": "21", "target": "80", "source_name": "social protest", "target_name": "folk music", "weight": 2.0, "year": 2014}, {"source": "21", "target": "82", "source_name": "social protest", "target_name": "heavy metal", "weight": 1.0, "year": 2014}, {"source": "21", "target": "87", "source_name": "social protest", "target_name": "music hall", "weight": 1.0, "year": 2014}, {"source": "22", "target": "35", "source_name": "chamber music", "target_name": "ancient greek", "weight": 1.0, "year": 2014}, {"source": "22", "target": "36", "source_name": "chamber music", "target_name": "music industry", "weight": 1.0, "year": 2014}, {"source": "22", "target": "38", "source_name": "chamber music", "target_name": "summary additional listening", "weight": 1.0, "year": 2014}, {"source": "22", "target": "40", "source_name": "chamber music", "target_name": "musical instruments", "weight": 1.0, "year": 2014}, {"source": "22", "target": "48", "source_name": "chamber music", "target_name": "pop music", "weight": 1.0, "year": 2014}, {"source": "22", "target": "52", "source_name": "chamber music", "target_name": "folk song", "weight": 1.0, "year": 2014}, {"source": "22", "target": "53", "source_name": "chamber music", "target_name": "popular music", "weight": 2.0, "year": 2014}, {"source": "22", "target": "54", "source_name": "chamber music", "target_name": "american popular music", "weight": 1.0, "year": 2014}, {"source": "22", "target": "65", "source_name": "chamber music", "target_name": "country music", "weight": 2.0, "year": 2014}, {"source": "22", "target": "69", "source_name": "chamber music", "target_name": "classical music", "weight": 3.0, "year": 2014}, {"source": "22", "target": "74", "source_name": "chamber music", "target_name": "united states", "weight": 1.0, "year": 2014}, {"source": "22", "target": "77", "source_name": "chamber music", "target_name": "rock music", "weight": 1.0, "year": 2014}, {"source": "22", "target": "79", "source_name": "chamber music", "target_name": "popular culture", "weight": 1.0, "year": 2014}, {"source": "22", "target": "80", "source_name": "chamber music", "target_name": "folk music", "weight": 2.0, "year": 2014}, {"source": "22", "target": "89", "source_name": "chamber music", "target_name": "electronic music", "weight": 3.0, "year": 2014}, {"source": "23", "target": "36", "source_name": "electronic dance music", "target_name": "music industry", "weight": 2.0, "year": 2014}, {"source": "23", "target": "42", "source_name": "electronic dance music", "target_name": "simon frith", "weight": 2.0, "year": 2014}, {"source": "23", "target": "47", "source_name": "electronic dance music", "target_name": "hard rock", "weight": 1.0, "year": 2014}, {"source": "23", "target": "53", "source_name": "electronic dance music", "target_name": "popular music", "weight": 8.0, "year": 2014}, {"source": "23", "target": "56", "source_name": "electronic dance music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2014}, {"source": "23", "target": "60", "source_name": "electronic dance music", "target_name": "cultural studies", "weight": 2.0, "year": 2014}, {"source": "23", "target": "67", "source_name": "electronic dance music", "target_name": "rock art", "weight": 1.0, "year": 2014}, {"source": "23", "target": "74", "source_name": "electronic dance music", "target_name": "united states", "weight": 2.0, "year": 2014}, {"source": "23", "target": "76", "source_name": "electronic dance music", "target_name": "los angeles", "weight": 1.0, "year": 2014}, {"source": "23", "target": "77", "source_name": "electronic dance music", "target_name": "rock music", "weight": 1.0, "year": 2014}, {"source": "23", "target": "78", "source_name": "electronic dance music", "target_name": "hip hop", "weight": 1.0, "year": 2014}, {"source": "23", "target": "79", "source_name": "electronic dance music", "target_name": "popular culture", "weight": 1.0, "year": 2014}, {"source": "23", "target": "82", "source_name": "electronic dance music", "target_name": "heavy metal", "weight": 2.0, "year": 2014}, {"source": "23", "target": "88", "source_name": "electronic dance music", "target_name": "oxford university press", "weight": 1.0, "year": 2014}, {"source": "23", "target": "89", "source_name": "electronic dance music", "target_name": "electronic music", "weight": 4.0, "year": 2014}, {"source": "24", "target": "27", "source_name": "punk rock", "target_name": "pop rock", "weight": 1.0, "year": 2014}, {"source": "24", "target": "30", "source_name": "punk rock", "target_name": "rock band", "weight": 1.0, "year": 2014}, {"source": "24", "target": "36", "source_name": "punk rock", "target_name": "music industry", "weight": 1.0, "year": 2014}, {"source": "24", "target": "41", "source_name": "punk rock", "target_name": "youth culture", "weight": 2.0, "year": 2014}, {"source": "24", "target": "42", "source_name": "punk rock", "target_name": "simon frith", "weight": 1.0, "year": 2014}, {"source": "24", "target": "44", "source_name": "punk rock", "target_name": "alternative rock", "weight": 4.0, "year": 2014}, {"source": "24", "target": "47", "source_name": "punk rock", "target_name": "hard rock", "weight": 5.0, "year": 2014}, {"source": "24", "target": "48", "source_name": "punk rock", "target_name": "pop music", "weight": 4.0, "year": 2014}, {"source": "24", "target": "51", "source_name": "punk rock", "target_name": "cultural identity", "weight": 1.0, "year": 2014}, {"source": "24", "target": "53", "source_name": "punk rock", "target_name": "popular music", "weight": 10.0, "year": 2014}, {"source": "24", "target": "61", "source_name": "punk rock", "target_name": "progressive rock", "weight": 2.0, "year": 2014}, {"source": "24", "target": "65", "source_name": "punk rock", "target_name": "country music", "weight": 1.0, "year": 2014}, {"source": "24", "target": "69", "source_name": "punk rock", "target_name": "classical music", "weight": 1.0, "year": 2014}, {"source": "24", "target": "74", "source_name": "punk rock", "target_name": "united states", "weight": 3.0, "year": 2014}, {"source": "24", "target": "77", "source_name": "punk rock", "target_name": "rock music", "weight": 9.0, "year": 2014}, {"source": "24", "target": "78", "source_name": "punk rock", "target_name": "hip hop", "weight": 1.0, "year": 2014}, {"source": "24", "target": "79", "source_name": "punk rock", "target_name": "popular culture", "weight": 1.0, "year": 2014}, {"source": "24", "target": "80", "source_name": "punk rock", "target_name": "folk music", "weight": 1.0, "year": 2014}, {"source": "24", "target": "82", "source_name": "punk rock", "target_name": "heavy metal", "weight": 4.0, "year": 2014}, {"source": "25", "target": "30", "source_name": "russian rock", "target_name": "rock band", "weight": 1.0, "year": 2014}, {"source": "25", "target": "37", "source_name": "russian rock", "target_name": "middle ages", "weight": 1.0, "year": 2014}, {"source": "25", "target": "46", "source_name": "russian rock", "target_name": "music festival", "weight": 1.0, "year": 2014}, {"source": "25", "target": "53", "source_name": "russian rock", "target_name": "popular music", "weight": 2.0, "year": 2014}, {"source": "25", "target": "66", "source_name": "russian rock", "target_name": "hong kong", "weight": 1.0, "year": 2014}, {"source": "25", "target": "77", "source_name": "russian rock", "target_name": "rock music", "weight": 2.0, "year": 2014}, {"source": "25", "target": "78", "source_name": "russian rock", "target_name": "hip hop", "weight": 1.0, "year": 2014}, {"source": "25", "target": "80", "source_name": "russian rock", "target_name": "folk music", "weight": 1.0, "year": 2014}, {"source": "25", "target": "85", "source_name": "russian rock", "target_name": "jewish music", "weight": 1.0, "year": 2014}, {"source": "26", "target": "43", "source_name": "information technology", "target_name": "music education", "weight": 1.0, "year": 2014}, {"source": "27", "target": "44", "source_name": "pop rock", "target_name": "alternative rock", "weight": 1.0, "year": 2014}, {"source": "27", "target": "47", "source_name": "pop rock", "target_name": "hard rock", "weight": 1.0, "year": 2014}, {"source": "27", "target": "48", "source_name": "pop rock", "target_name": "pop music", "weight": 1.0, "year": 2014}, {"source": "27", "target": "53", "source_name": "pop rock", "target_name": "popular music", "weight": 1.0, "year": 2014}, {"source": "27", "target": "64", "source_name": "pop rock", "target_name": "english language", "weight": 1.0, "year": 2014}, {"source": "27", "target": "65", "source_name": "pop rock", "target_name": "country music", "weight": 1.0, "year": 2014}, {"source": "27", "target": "66", "source_name": "pop rock", "target_name": "hong kong", "weight": 1.0, "year": 2014}, {"source": "27", "target": "67", "source_name": "pop rock", "target_name": "rock art", "weight": 1.0, "year": 2014}, {"source": "27", "target": "77", "source_name": "pop rock", "target_name": "rock music", "weight": 1.0, "year": 2014}, {"source": "27", "target": "83", "source_name": "pop rock", "target_name": "folk rock", "weight": 1.0, "year": 2014}, {"source": "28", "target": "30", "source_name": "high school", "target_name": "rock band", "weight": 1.0, "year": 2014}, {"source": "28", "target": "37", "source_name": "high school", "target_name": "middle ages", "weight": 1.0, "year": 2014}, {"source": "28", "target": "48", "source_name": "high school", "target_name": "pop music", "weight": 1.0, "year": 2014}, {"source": "28", "target": "61", "source_name": "high school", "target_name": "progressive rock", "weight": 1.0, "year": 2014}, {"source": "28", "target": "77", "source_name": "high school", "target_name": "rock music", "weight": 5.0, "year": 2014}, {"source": "28", "target": "82", "source_name": "high school", "target_name": "heavy metal", "weight": 1.0, "year": 2014}, {"source": "29", "target": "36", "source_name": "rolling stone", "target_name": "music industry", "weight": 1.0, "year": 2014}, {"source": "29", "target": "42", "source_name": "rolling stone", "target_name": "simon frith", "weight": 1.0, "year": 2014}, {"source": "29", "target": "48", "source_name": "rolling stone", "target_name": "pop music", "weight": 4.0, "year": 2014}, {"source": "29", "target": "53", "source_name": "rolling stone", "target_name": "popular music", "weight": 7.0, "year": 2014}, {"source": "29", "target": "55", "source_name": "rolling stone", "target_name": "rock criticism", "weight": 4.0, "year": 2014}, {"source": "29", "target": "56", "source_name": "rolling stone", "target_name": "bruce springsteen", "weight": 2.0, "year": 2014}, {"source": "29", "target": "62", "source_name": "rolling stone", "target_name": "led zeppelin", "weight": 1.0, "year": 2014}, {"source": "29", "target": "72", "source_name": "rolling stone", "target_name": "jimi hendrix", "weight": 2.0, "year": 2014}, {"source": "29", "target": "74", "source_name": "rolling stone", "target_name": "united states", "weight": 1.0, "year": 2014}, {"source": "29", "target": "77", "source_name": "rolling stone", "target_name": "rock music", "weight": 8.0, "year": 2014}, {"source": "29", "target": "79", "source_name": "rolling stone", "target_name": "popular culture", "weight": 2.0, "year": 2014}, {"source": "29", "target": "80", "source_name": "rolling stone", "target_name": "folk music", "weight": 1.0, "year": 2014}, {"source": "29", "target": "87", "source_name": "rolling stone", "target_name": "music hall", "weight": 1.0, "year": 2014}, {"source": "30", "target": "36", "source_name": "rock band", "target_name": "music industry", "weight": 2.0, "year": 2014}, {"source": "30", "target": "37", "source_name": "rock band", "target_name": "middle ages", "weight": 2.0, "year": 2014}, {"source": "30", "target": "41", "source_name": "rock band", "target_name": "youth culture", "weight": 1.0, "year": 2014}, {"source": "30", "target": "43", "source_name": "rock band", "target_name": "music education", "weight": 2.0, "year": 2014}, {"source": "30", "target": "44", "source_name": "rock band", "target_name": "alternative rock", "weight": 1.0, "year": 2014}, {"source": "30", "target": "47", "source_name": "rock band", "target_name": "hard rock", "weight": 1.0, "year": 2014}, {"source": "30", "target": "48", "source_name": "rock band", "target_name": "pop music", "weight": 1.0, "year": 2014}, {"source": "30", "target": "52", "source_name": "rock band", "target_name": "folk song", "weight": 2.0, "year": 2014}, {"source": "30", "target": "53", "source_name": "rock band", "target_name": "popular music", "weight": 19.0, "year": 2014}, {"source": "30", "target": "54", "source_name": "rock band", "target_name": "american popular music", "weight": 1.0, "year": 2014}, {"source": "30", "target": "61", "source_name": "rock band", "target_name": "progressive rock", "weight": 9.0, "year": 2014}, {"source": "30", "target": "65", "source_name": "rock band", "target_name": "country music", "weight": 1.0, "year": 2014}, {"source": "30", "target": "69", "source_name": "rock band", "target_name": "classical music", "weight": 2.0, "year": 2014}, {"source": "30", "target": "72", "source_name": "rock band", "target_name": "jimi hendrix", "weight": 2.0, "year": 2014}, {"source": "30", "target": "73", "source_name": "rock band", "target_name": "southern rock", "weight": 2.0, "year": 2014}, {"source": "30", "target": "74", "source_name": "rock band", "target_name": "united states", "weight": 2.0, "year": 2014}, {"source": "30", "target": "76", "source_name": "rock band", "target_name": "los angeles", "weight": 1.0, "year": 2014}, {"source": "30", "target": "77", "source_name": "rock band", "target_name": "rock music", "weight": 30.0, "year": 2014}, {"source": "30", "target": "79", "source_name": "rock band", "target_name": "popular culture", "weight": 1.0, "year": 2014}, {"source": "30", "target": "80", "source_name": "rock band", "target_name": "folk music", "weight": 2.0, "year": 2014}, {"source": "30", "target": "82", "source_name": "rock band", "target_name": "heavy metal", "weight": 2.0, "year": 2014}, {"source": "30", "target": "83", "source_name": "rock band", "target_name": "folk rock", "weight": 1.0, "year": 2014}, {"source": "32", "target": "43", "source_name": "higher education", "target_name": "music education", "weight": 1.0, "year": 2014}, {"source": "33", "target": "53", "source_name": "jesus christ", "target_name": "popular music", "weight": 1.0, "year": 2014}, {"source": "33", "target": "70", "source_name": "jesus christ", "target_name": "world war", "weight": 1.0, "year": 2014}, {"source": "33", "target": "77", "source_name": "jesus christ", "target_name": "rock music", "weight": 4.0, "year": 2014}, {"source": "34", "target": "36", "source_name": "mass media", "target_name": "music industry", "weight": 1.0, "year": 2014}, {"source": "34", "target": "40", "source_name": "mass media", "target_name": "musical instruments", "weight": 1.0, "year": 2014}, {"source": "34", "target": "41", "source_name": "mass media", "target_name": "youth culture", "weight": 1.0, "year": 2014}, {"source": "34", "target": "43", "source_name": "mass media", "target_name": "music education", "weight": 2.0, "year": 2014}, {"source": "34", "target": "46", "source_name": "mass media", "target_name": "music festival", "weight": 1.0, "year": 2014}, {"source": "34", "target": "48", "source_name": "mass media", "target_name": "pop music", "weight": 2.0, "year": 2014}, {"source": "34", "target": "51", "source_name": "mass media", "target_name": "cultural identity", "weight": 1.0, "year": 2014}, {"source": "34", "target": "52", "source_name": "mass media", "target_name": "folk song", "weight": 2.0, "year": 2014}, {"source": "34", "target": "53", "source_name": "mass media", "target_name": "popular music", "weight": 6.0, "year": 2014}, {"source": "34", "target": "65", "source_name": "mass media", "target_name": "country music", "weight": 1.0, "year": 2014}, {"source": "34", "target": "66", "source_name": "mass media", "target_name": "hong kong", "weight": 1.0, "year": 2014}, {"source": "34", "target": "67", "source_name": "mass media", "target_name": "rock art", "weight": 1.0, "year": 2014}, {"source": "34", "target": "69", "source_name": "mass media", "target_name": "classical music", "weight": 1.0, "year": 2014}, {"source": "34", "target": "77", "source_name": "mass media", "target_name": "rock music", "weight": 4.0, "year": 2014}, {"source": "34", "target": "79", "source_name": "mass media", "target_name": "popular culture", "weight": 1.0, "year": 2014}, {"source": "35", "target": "43", "source_name": "ancient greek", "target_name": "music education", "weight": 1.0, "year": 2014}, {"source": "35", "target": "65", "source_name": "ancient greek", "target_name": "country music", "weight": 1.0, "year": 2014}, {"source": "35", "target": "77", "source_name": "ancient greek", "target_name": "rock music", "weight": 1.0, "year": 2014}, {"source": "35", "target": "80", "source_name": "ancient greek", "target_name": "folk music", "weight": 1.0, "year": 2014}, {"source": "35", "target": "89", "source_name": "ancient greek", "target_name": "electronic music", "weight": 1.0, "year": 2014}, {"source": "36", "target": "38", "source_name": "music industry", "target_name": "summary additional listening", "weight": 1.0, "year": 2014}, {"source": "36", "target": "40", "source_name": "music industry", "target_name": "musical instruments", "weight": 1.0, "year": 2014}, {"source": "36", "target": "41", "source_name": "music industry", "target_name": "youth culture", "weight": 2.0, "year": 2014}, {"source": "36", "target": "42", "source_name": "music industry", "target_name": "simon frith", "weight": 2.0, "year": 2014}, {"source": "36", "target": "43", "source_name": "music industry", "target_name": "music education", "weight": 2.0, "year": 2014}, {"source": "36", "target": "46", "source_name": "music industry", "target_name": "music festival", "weight": 1.0, "year": 2014}, {"source": "36", "target": "47", "source_name": "music industry", "target_name": "hard rock", "weight": 3.0, "year": 2014}, {"source": "36", "target": "48", "source_name": "music industry", "target_name": "pop music", "weight": 10.0, "year": 2014}, {"source": "36", "target": "49", "source_name": "music industry", "target_name": "music theory", "weight": 1.0, "year": 2014}, {"source": "36", "target": "50", "source_name": "music industry", "target_name": "hollywood film", "weight": 1.0, "year": 2014}, {"source": "36", "target": "51", "source_name": "music industry", "target_name": "cultural identity", "weight": 1.0, "year": 2014}, {"source": "36", "target": "52", "source_name": "music industry", "target_name": "folk song", "weight": 1.0, "year": 2014}, {"source": "36", "target": "53", "source_name": "music industry", "target_name": "popular music", "weight": 29.0, "year": 2014}, {"source": "36", "target": "54", "source_name": "music industry", "target_name": "american popular music", "weight": 3.0, "year": 2014}, {"source": "36", "target": "55", "source_name": "music industry", "target_name": "rock criticism", "weight": 3.0, "year": 2014}, {"source": "36", "target": "56", "source_name": "music industry", "target_name": "bruce springsteen", "weight": 2.0, "year": 2014}, {"source": "36", "target": "60", "source_name": "music industry", "target_name": "cultural studies", "weight": 1.0, "year": 2014}, {"source": "36", "target": "61", "source_name": "music industry", "target_name": "progressive rock", "weight": 1.0, "year": 2014}, {"source": "36", "target": "62", "source_name": "music industry", "target_name": "led zeppelin", "weight": 1.0, "year": 2014}, {"source": "36", "target": "65", "source_name": "music industry", "target_name": "country music", "weight": 2.0, "year": 2014}, {"source": "36", "target": "66", "source_name": "music industry", "target_name": "hong kong", "weight": 1.0, "year": 2014}, {"source": "36", "target": "67", "source_name": "music industry", "target_name": "rock art", "weight": 1.0, "year": 2014}, {"source": "36", "target": "68", "source_name": "music industry", "target_name": "hearing loss", "weight": 1.0, "year": 2014}, {"source": "36", "target": "69", "source_name": "music industry", "target_name": "classical music", "weight": 6.0, "year": 2014}, {"source": "36", "target": "70", "source_name": "music industry", "target_name": "world war", "weight": 2.0, "year": 2014}, {"source": "36", "target": "72", "source_name": "music industry", "target_name": "jimi hendrix", "weight": 4.0, "year": 2014}, {"source": "36", "target": "74", "source_name": "music industry", "target_name": "united states", "weight": 5.0, "year": 2014}, {"source": "36", "target": "75", "source_name": "music industry", "target_name": "world war ii", "weight": 3.0, "year": 2014}, {"source": "36", "target": "76", "source_name": "music industry", "target_name": "los angeles", "weight": 2.0, "year": 2014}, {"source": "36", "target": "77", "source_name": "music industry", "target_name": "rock music", "weight": 19.0, "year": 2014}, {"source": "36", "target": "78", "source_name": "music industry", "target_name": "hip hop", "weight": 5.0, "year": 2014}, {"source": "36", "target": "79", "source_name": "music industry", "target_name": "popular culture", "weight": 4.0, "year": 2014}, {"source": "36", "target": "80", "source_name": "music industry", "target_name": "folk music", "weight": 4.0, "year": 2014}, {"source": "36", "target": "82", "source_name": "music industry", "target_name": "heavy metal", "weight": 2.0, "year": 2014}, {"source": "36", "target": "83", "source_name": "music industry", "target_name": "folk rock", "weight": 1.0, "year": 2014}, {"source": "36", "target": "87", "source_name": "music industry", "target_name": "music hall", "weight": 1.0, "year": 2014}, {"source": "36", "target": "88", "source_name": "music industry", "target_name": "oxford university press", "weight": 2.0, "year": 2014}, {"source": "36", "target": "89", "source_name": "music industry", "target_name": "electronic music", "weight": 2.0, "year": 2014}, {"source": "37", "target": "44", "source_name": "middle ages", "target_name": "alternative rock", "weight": 1.0, "year": 2014}, {"source": "37", "target": "58", "source_name": "middle ages", "target_name": "music therapy", "weight": 1.0, "year": 2014}, {"source": "37", "target": "61", "source_name": "middle ages", "target_name": "progressive rock", "weight": 1.0, "year": 2014}, {"source": "37", "target": "69", "source_name": "middle ages", "target_name": "classical music", "weight": 1.0, "year": 2014}, {"source": "37", "target": "77", "source_name": "middle ages", "target_name": "rock music", "weight": 3.0, "year": 2014}, {"source": "37", "target": "80", "source_name": "middle ages", "target_name": "folk music", "weight": 2.0, "year": 2014}, {"source": "38", "target": "40", "source_name": "summary additional listening", "target_name": "musical instruments", "weight": 1.0, "year": 2014}, {"source": "38", "target": "52", "source_name": "summary additional listening", "target_name": "folk song", "weight": 1.0, "year": 2014}, {"source": "38", "target": "53", "source_name": "summary additional listening", "target_name": "popular music", "weight": 1.0, "year": 2014}, {"source": "38", "target": "54", "source_name": "summary additional listening", "target_name": "american popular music", "weight": 1.0, "year": 2014}, {"source": "38", "target": "65", "source_name": "summary additional listening", "target_name": "country music", "weight": 1.0, "year": 2014}, {"source": "38", "target": "69", "source_name": "summary additional listening", "target_name": "classical music", "weight": 1.0, "year": 2014}, {"source": "38", "target": "74", "source_name": "summary additional listening", "target_name": "united states", "weight": 1.0, "year": 2014}, {"source": "38", "target": "80", "source_name": "summary additional listening", "target_name": "folk music", "weight": 1.0, "year": 2014}, {"source": "38", "target": "89", "source_name": "summary additional listening", "target_name": "electronic music", "weight": 1.0, "year": 2014}, {"source": "40", "target": "43", "source_name": "musical instruments", "target_name": "music education", "weight": 1.0, "year": 2014}, {"source": "40", "target": "49", "source_name": "musical instruments", "target_name": "music theory", "weight": 1.0, "year": 2014}, {"source": "40", "target": "52", "source_name": "musical instruments", "target_name": "folk song", "weight": 1.0, "year": 2014}, {"source": "40", "target": "53", "source_name": "musical instruments", "target_name": "popular music", "weight": 2.0, "year": 2014}, {"source": "40", "target": "54", "source_name": "musical instruments", "target_name": "american popular music", "weight": 2.0, "year": 2014}, {"source": "40", "target": "65", "source_name": "musical instruments", "target_name": "country music", "weight": 1.0, "year": 2014}, {"source": "40", "target": "69", "source_name": "musical instruments", "target_name": "classical music", "weight": 1.0, "year": 2014}, {"source": "40", "target": "70", "source_name": "musical instruments", "target_name": "world war", "weight": 1.0, "year": 2014}, {"source": "40", "target": "74", "source_name": "musical instruments", "target_name": "united states", "weight": 2.0, "year": 2014}, {"source": "40", "target": "75", "source_name": "musical instruments", "target_name": "world war ii", "weight": 1.0, "year": 2014}, {"source": "40", "target": "80", "source_name": "musical instruments", "target_name": "folk music", "weight": 1.0, "year": 2014}, {"source": "40", "target": "89", "source_name": "musical instruments", "target_name": "electronic music", "weight": 2.0, "year": 2014}, {"source": "41", "target": "47", "source_name": "youth culture", "target_name": "hard rock", "weight": 1.0, "year": 2014}, {"source": "41", "target": "48", "source_name": "youth culture", "target_name": "pop music", "weight": 4.0, "year": 2014}, {"source": "41", "target": "51", "source_name": "youth culture", "target_name": "cultural identity", "weight": 2.0, "year": 2014}, {"source": "41", "target": "53", "source_name": "youth culture", "target_name": "popular music", "weight": 6.0, "year": 2014}, {"source": "41", "target": "57", "source_name": "youth culture", "target_name": "north america", "weight": 1.0, "year": 2014}, {"source": "41", "target": "60", "source_name": "youth culture", "target_name": "cultural studies", "weight": 2.0, "year": 2014}, {"source": "41", "target": "61", "source_name": "youth culture", "target_name": "progressive rock", "weight": 1.0, "year": 2014}, {"source": "41", "target": "66", "source_name": "youth culture", "target_name": "hong kong", "weight": 1.0, "year": 2014}, {"source": "41", "target": "74", "source_name": "youth culture", "target_name": "united states", "weight": 2.0, "year": 2014}, {"source": "41", "target": "75", "source_name": "youth culture", "target_name": "world war ii", "weight": 1.0, "year": 2014}, {"source": "41", "target": "77", "source_name": "youth culture", "target_name": "rock music", "weight": 9.0, "year": 2014}, {"source": "41", "target": "80", "source_name": "youth culture", "target_name": "folk music", "weight": 1.0, "year": 2014}, {"source": "42", "target": "47", "source_name": "simon frith", "target_name": "hard rock", "weight": 1.0, "year": 2014}, {"source": "42", "target": "48", "source_name": "simon frith", "target_name": "pop music", "weight": 6.0, "year": 2014}, {"source": "42", "target": "49", "source_name": "simon frith", "target_name": "music theory", "weight": 1.0, "year": 2014}, {"source": "42", "target": "51", "source_name": "simon frith", "target_name": "cultural identity", "weight": 1.0, "year": 2014}, {"source": "42", "target": "53", "source_name": "simon frith", "target_name": "popular music", "weight": 6.0, "year": 2014}, {"source": "42", "target": "55", "source_name": "simon frith", "target_name": "rock criticism", "weight": 2.0, "year": 2014}, {"source": "42", "target": "56", "source_name": "simon frith", "target_name": "bruce springsteen", "weight": 1.0, "year": 2014}, {"source": "42", "target": "57", "source_name": "simon frith", "target_name": "north america", "weight": 1.0, "year": 2014}, {"source": "42", "target": "60", "source_name": "simon frith", "target_name": "cultural studies", "weight": 3.0, "year": 2014}, {"source": "42", "target": "61", "source_name": "simon frith", "target_name": "progressive rock", "weight": 1.0, "year": 2014}, {"source": "42", "target": "65", "source_name": "simon frith", "target_name": "country music", "weight": 1.0, "year": 2014}, {"source": "42", "target": "72", "source_name": "simon frith", "target_name": "jimi hendrix", "weight": 1.0, "year": 2014}, {"source": "42", "target": "76", "source_name": "simon frith", "target_name": "los angeles", "weight": 1.0, "year": 2014}, {"source": "42", "target": "77", "source_name": "simon frith", "target_name": "rock music", "weight": 5.0, "year": 2014}, {"source": "42", "target": "78", "source_name": "simon frith", "target_name": "hip hop", "weight": 1.0, "year": 2014}, {"source": "42", "target": "79", "source_name": "simon frith", "target_name": "popular culture", "weight": 2.0, "year": 2014}, {"source": "42", "target": "82", "source_name": "simon frith", "target_name": "heavy metal", "weight": 1.0, "year": 2014}, {"source": "42", "target": "88", "source_name": "simon frith", "target_name": "oxford university press", "weight": 1.0, "year": 2014}, {"source": "43", "target": "48", "source_name": "music education", "target_name": "pop music", "weight": 2.0, "year": 2014}, {"source": "43", "target": "49", "source_name": "music education", "target_name": "music theory", "weight": 3.0, "year": 2014}, {"source": "43", "target": "52", "source_name": "music education", "target_name": "folk song", "weight": 1.0, "year": 2014}, {"source": "43", "target": "53", "source_name": "music education", "target_name": "popular music", "weight": 6.0, "year": 2014}, {"source": "43", "target": "57", "source_name": "music education", "target_name": "north america", "weight": 1.0, "year": 2014}, {"source": "43", "target": "60", "source_name": "music education", "target_name": "cultural studies", "weight": 1.0, "year": 2014}, {"source": "43", "target": "66", "source_name": "music education", "target_name": "hong kong", "weight": 1.0, "year": 2014}, {"source": "43", "target": "69", "source_name": "music education", "target_name": "classical music", "weight": 3.0, "year": 2014}, {"source": "43", "target": "74", "source_name": "music education", "target_name": "united states", "weight": 1.0, "year": 2014}, {"source": "43", "target": "77", "source_name": "music education", "target_name": "rock music", "weight": 4.0, "year": 2014}, {"source": "43", "target": "80", "source_name": "music education", "target_name": "folk music", "weight": 6.0, "year": 2014}, {"source": "43", "target": "82", "source_name": "music education", "target_name": "heavy metal", "weight": 1.0, "year": 2014}, {"source": "44", "target": "47", "source_name": "alternative rock", "target_name": "hard rock", "weight": 2.0, "year": 2014}, {"source": "44", "target": "48", "source_name": "alternative rock", "target_name": "pop music", "weight": 1.0, "year": 2014}, {"source": "44", "target": "51", "source_name": "alternative rock", "target_name": "cultural identity", "weight": 1.0, "year": 2014}, {"source": "44", "target": "53", "source_name": "alternative rock", "target_name": "popular music", "weight": 9.0, "year": 2014}, {"source": "44", "target": "57", "source_name": "alternative rock", "target_name": "north america", "weight": 3.0, "year": 2014}, {"source": "44", "target": "61", "source_name": "alternative rock", "target_name": "progressive rock", "weight": 1.0, "year": 2014}, {"source": "44", "target": "65", "source_name": "alternative rock", "target_name": "country music", "weight": 2.0, "year": 2014}, {"source": "44", "target": "67", "source_name": "alternative rock", "target_name": "rock art", "weight": 1.0, "year": 2014}, {"source": "44", "target": "73", "source_name": "alternative rock", "target_name": "southern rock", "weight": 1.0, "year": 2014}, {"source": "44", "target": "74", "source_name": "alternative rock", "target_name": "united states", "weight": 2.0, "year": 2014}, {"source": "44", "target": "77", "source_name": "alternative rock", "target_name": "rock music", "weight": 7.0, "year": 2014}, {"source": "44", "target": "78", "source_name": "alternative rock", "target_name": "hip hop", "weight": 1.0, "year": 2014}, {"source": "44", "target": "80", "source_name": "alternative rock", "target_name": "folk music", "weight": 1.0, "year": 2014}, {"source": "44", "target": "82", "source_name": "alternative rock", "target_name": "heavy metal", "weight": 1.0, "year": 2014}, {"source": "45", "target": "77", "source_name": "double bass", "target_name": "rock music", "weight": 2.0, "year": 2014}, {"source": "46", "target": "48", "source_name": "music festival", "target_name": "pop music", "weight": 2.0, "year": 2014}, {"source": "46", "target": "53", "source_name": "music festival", "target_name": "popular music", "weight": 2.0, "year": 2014}, {"source": "46", "target": "61", "source_name": "music festival", "target_name": "progressive rock", "weight": 1.0, "year": 2014}, {"source": "46", "target": "66", "source_name": "music festival", "target_name": "hong kong", "weight": 1.0, "year": 2014}, {"source": "46", "target": "69", "source_name": "music festival", "target_name": "classical music", "weight": 3.0, "year": 2014}, {"source": "46", "target": "77", "source_name": "music festival", "target_name": "rock music", "weight": 3.0, "year": 2014}, {"source": "46", "target": "78", "source_name": "music festival", "target_name": "hip hop", "weight": 1.0, "year": 2014}, {"source": "46", "target": "80", "source_name": "music festival", "target_name": "folk music", "weight": 2.0, "year": 2014}, {"source": "46", "target": "85", "source_name": "music festival", "target_name": "jewish music", "weight": 1.0, "year": 2014}, {"source": "47", "target": "48", "source_name": "hard rock", "target_name": "pop music", "weight": 2.0, "year": 2014}, {"source": "47", "target": "51", "source_name": "hard rock", "target_name": "cultural identity", "weight": 1.0, "year": 2014}, {"source": "47", "target": "53", "source_name": "hard rock", "target_name": "popular music", "weight": 5.0, "year": 2014}, {"source": "47", "target": "56", "source_name": "hard rock", "target_name": "bruce springsteen", "weight": 1.0, "year": 2014}, {"source": "47", "target": "57", "source_name": "hard rock", "target_name": "north america", "weight": 1.0, "year": 2014}, {"source": "47", "target": "59", "source_name": "hard rock", "target_name": "college students", "weight": 1.0, "year": 2014}, {"source": "47", "target": "61", "source_name": "hard rock", "target_name": "progressive rock", "weight": 2.0, "year": 2014}, {"source": "47", "target": "65", "source_name": "hard rock", "target_name": "country music", "weight": 1.0, "year": 2014}, {"source": "47", "target": "69", "source_name": "hard rock", "target_name": "classical music", "weight": 2.0, "year": 2014}, {"source": "47", "target": "74", "source_name": "hard rock", "target_name": "united states", "weight": 1.0, "year": 2014}, {"source": "47", "target": "77", "source_name": "hard rock", "target_name": "rock music", "weight": 12.0, "year": 2014}, {"source": "47", "target": "78", "source_name": "hard rock", "target_name": "hip hop", "weight": 1.0, "year": 2014}, {"source": "47", "target": "79", "source_name": "hard rock", "target_name": "popular culture", "weight": 2.0, "year": 2014}, {"source": "47", "target": "82", "source_name": "hard rock", "target_name": "heavy metal", "weight": 7.0, "year": 2014}, {"source": "47", "target": "83", "source_name": "hard rock", "target_name": "folk rock", "weight": 1.0, "year": 2014}, {"source": "47", "target": "89", "source_name": "hard rock", "target_name": "electronic music", "weight": 1.0, "year": 2014}, {"source": "48", "target": "49", "source_name": "pop music", "target_name": "music theory", "weight": 1.0, "year": 2014}, {"source": "48", "target": "51", "source_name": "pop music", "target_name": "cultural identity", "weight": 3.0, "year": 2014}, {"source": "48", "target": "52", "source_name": "pop music", "target_name": "folk song", "weight": 2.0, "year": 2014}, {"source": "48", "target": "53", "source_name": "pop music", "target_name": "popular music", "weight": 36.0, "year": 2014}, {"source": "48", "target": "55", "source_name": "pop music", "target_name": "rock criticism", "weight": 2.0, "year": 2014}, {"source": "48", "target": "57", "source_name": "pop music", "target_name": "north america", "weight": 2.0, "year": 2014}, {"source": "48", "target": "59", "source_name": "pop music", "target_name": "college students", "weight": 3.0, "year": 2014}, {"source": "48", "target": "60", "source_name": "pop music", "target_name": "cultural studies", "weight": 1.0, "year": 2014}, {"source": "48", "target": "62", "source_name": "pop music", "target_name": "led zeppelin", "weight": 2.0, "year": 2014}, {"source": "48", "target": "64", "source_name": "pop music", "target_name": "english language", "weight": 2.0, "year": 2014}, {"source": "48", "target": "65", "source_name": "pop music", "target_name": "country music", "weight": 2.0, "year": 2014}, {"source": "48", "target": "66", "source_name": "pop music", "target_name": "hong kong", "weight": 4.0, "year": 2014}, {"source": "48", "target": "67", "source_name": "pop music", "target_name": "rock art", "weight": 3.0, "year": 2014}, {"source": "48", "target": "69", "source_name": "pop music", "target_name": "classical music", "weight": 8.0, "year": 2014}, {"source": "48", "target": "70", "source_name": "pop music", "target_name": "world war", "weight": 2.0, "year": 2014}, {"source": "48", "target": "71", "source_name": "pop music", "target_name": "latin american", "weight": 1.0, "year": 2014}, {"source": "48", "target": "72", "source_name": "pop music", "target_name": "jimi hendrix", "weight": 3.0, "year": 2014}, {"source": "48", "target": "74", "source_name": "pop music", "target_name": "united states", "weight": 4.0, "year": 2014}, {"source": "48", "target": "76", "source_name": "pop music", "target_name": "los angeles", "weight": 1.0, "year": 2014}, {"source": "48", "target": "77", "source_name": "pop music", "target_name": "rock music", "weight": 34.0, "year": 2014}, {"source": "48", "target": "78", "source_name": "pop music", "target_name": "hip hop", "weight": 4.0, "year": 2014}, {"source": "48", "target": "79", "source_name": "pop music", "target_name": "popular culture", "weight": 6.0, "year": 2014}, {"source": "48", "target": "80", "source_name": "pop music", "target_name": "folk music", "weight": 7.0, "year": 2014}, {"source": "48", "target": "82", "source_name": "pop music", "target_name": "heavy metal", "weight": 2.0, "year": 2014}, {"source": "48", "target": "83", "source_name": "pop music", "target_name": "folk rock", "weight": 2.0, "year": 2014}, {"source": "48", "target": "87", "source_name": "pop music", "target_name": "music hall", "weight": 1.0, "year": 2014}, {"source": "49", "target": "53", "source_name": "music theory", "target_name": "popular music", "weight": 5.0, "year": 2014}, {"source": "49", "target": "54", "source_name": "music theory", "target_name": "american popular music", "weight": 1.0, "year": 2014}, {"source": "49", "target": "55", "source_name": "music theory", "target_name": "rock criticism", "weight": 1.0, "year": 2014}, {"source": "49", "target": "57", "source_name": "music theory", "target_name": "north america", "weight": 2.0, "year": 2014}, {"source": "49", "target": "61", "source_name": "music theory", "target_name": "progressive rock", "weight": 1.0, "year": 2014}, {"source": "49", "target": "69", "source_name": "music theory", "target_name": "classical music", "weight": 1.0, "year": 2014}, {"source": "49", "target": "72", "source_name": "music theory", "target_name": "jimi hendrix", "weight": 1.0, "year": 2014}, {"source": "49", "target": "77", "source_name": "music theory", "target_name": "rock music", "weight": 4.0, "year": 2014}, {"source": "49", "target": "78", "source_name": "music theory", "target_name": "hip hop", "weight": 1.0, "year": 2014}, {"source": "49", "target": "88", "source_name": "music theory", "target_name": "oxford university press", "weight": 2.0, "year": 2014}, {"source": "49", "target": "89", "source_name": "music theory", "target_name": "electronic music", "weight": 1.0, "year": 2014}, {"source": "50", "target": "53", "source_name": "hollywood film", "target_name": "popular music", "weight": 1.0, "year": 2014}, {"source": "50", "target": "60", "source_name": "hollywood film", "target_name": "cultural studies", "weight": 1.0, "year": 2014}, {"source": "50", "target": "79", "source_name": "hollywood film", "target_name": "popular culture", "weight": 1.0, "year": 2014}, {"source": "50", "target": "81", "source_name": "hollywood film", "target_name": "avant garde", "weight": 1.0, "year": 2014}, {"source": "50", "target": "88", "source_name": "hollywood film", "target_name": "oxford university press", "weight": 1.0, "year": 2014}, {"source": "51", "target": "52", "source_name": "cultural identity", "target_name": "folk song", "weight": 1.0, "year": 2014}, {"source": "51", "target": "53", "source_name": "cultural identity", "target_name": "popular music", "weight": 2.0, "year": 2014}, {"source": "51", "target": "60", "source_name": "cultural identity", "target_name": "cultural studies", "weight": 2.0, "year": 2014}, {"source": "51", "target": "65", "source_name": "cultural identity", "target_name": "country music", "weight": 1.0, "year": 2014}, {"source": "51", "target": "66", "source_name": "cultural identity", "target_name": "hong kong", "weight": 1.0, "year": 2014}, {"source": "51", "target": "72", "source_name": "cultural identity", "target_name": "jimi hendrix", "weight": 2.0, "year": 2014}, {"source": "51", "target": "74", "source_name": "cultural identity", "target_name": "united states", "weight": 2.0, "year": 2014}, {"source": "51", "target": "77", "source_name": "cultural identity", "target_name": "rock music", "weight": 6.0, "year": 2014}, {"source": "51", "target": "79", "source_name": "cultural identity", "target_name": "popular culture", "weight": 2.0, "year": 2014}, {"source": "51", "target": "80", "source_name": "cultural identity", "target_name": "folk music", "weight": 1.0, "year": 2014}, {"source": "51", "target": "82", "source_name": "cultural identity", "target_name": "heavy metal", "weight": 1.0, "year": 2014}, {"source": "52", "target": "53", "source_name": "folk song", "target_name": "popular music", "weight": 10.0, "year": 2014}, {"source": "52", "target": "54", "source_name": "folk song", "target_name": "american popular music", "weight": 2.0, "year": 2014}, {"source": "52", "target": "65", "source_name": "folk song", "target_name": "country music", "weight": 1.0, "year": 2014}, {"source": "52", "target": "66", "source_name": "folk song", "target_name": "hong kong", "weight": 1.0, "year": 2014}, {"source": "52", "target": "69", "source_name": "folk song", "target_name": "classical music", "weight": 2.0, "year": 2014}, {"source": "52", "target": "74", "source_name": "folk song", "target_name": "united states", "weight": 1.0, "year": 2014}, {"source": "52", "target": "77", "source_name": "folk song", "target_name": "rock music", "weight": 4.0, "year": 2014}, {"source": "52", "target": "80", "source_name": "folk song", "target_name": "folk music", "weight": 8.0, "year": 2014}, {"source": "52", "target": "87", "source_name": "folk song", "target_name": "music hall", "weight": 1.0, "year": 2014}, {"source": "52", "target": "89", "source_name": "folk song", "target_name": "electronic music", "weight": 1.0, "year": 2014}, {"source": "53", "target": "54", "source_name": "popular music", "target_name": "american popular music", "weight": 17.0, "year": 2014}, {"source": "53", "target": "55", "source_name": "popular music", "target_name": "rock criticism", "weight": 5.0, "year": 2014}, {"source": "53", "target": "56", "source_name": "popular music", "target_name": "bruce springsteen", "weight": 2.0, "year": 2014}, {"source": "53", "target": "57", "source_name": "popular music", "target_name": "north america", "weight": 8.0, "year": 2014}, {"source": "53", "target": "58", "source_name": "popular music", "target_name": "music therapy", "weight": 1.0, "year": 2014}, {"source": "53", "target": "59", "source_name": "popular music", "target_name": "college students", "weight": 3.0, "year": 2014}, {"source": "53", "target": "60", "source_name": "popular music", "target_name": "cultural studies", "weight": 8.0, "year": 2014}, {"source": "53", "target": "61", "source_name": "popular music", "target_name": "progressive rock", "weight": 9.0, "year": 2014}, {"source": "53", "target": "62", "source_name": "popular music", "target_name": "led zeppelin", "weight": 2.0, "year": 2014}, {"source": "53", "target": "64", "source_name": "popular music", "target_name": "english language", "weight": 1.0, "year": 2014}, {"source": "53", "target": "65", "source_name": "popular music", "target_name": "country music", "weight": 11.0, "year": 2014}, {"source": "53", "target": "66", "source_name": "popular music", "target_name": "hong kong", "weight": 4.0, "year": 2014}, {"source": "53", "target": "67", "source_name": "popular music", "target_name": "rock art", "weight": 8.0, "year": 2014}, {"source": "53", "target": "69", "source_name": "popular music", "target_name": "classical music", "weight": 15.0, "year": 2014}, {"source": "53", "target": "70", "source_name": "popular music", "target_name": "world war", "weight": 6.0, "year": 2014}, {"source": "53", "target": "71", "source_name": "popular music", "target_name": "latin american", "weight": 2.0, "year": 2014}, {"source": "53", "target": "72", "source_name": "popular music", "target_name": "jimi hendrix", "weight": 5.0, "year": 2014}, {"source": "53", "target": "73", "source_name": "popular music", "target_name": "southern rock", "weight": 2.0, "year": 2014}, {"source": "53", "target": "74", "source_name": "popular music", "target_name": "united states", "weight": 20.0, "year": 2014}, {"source": "53", "target": "75", "source_name": "popular music", "target_name": "world war ii", "weight": 4.0, "year": 2014}, {"source": "53", "target": "76", "source_name": "popular music", "target_name": "los angeles", "weight": 6.0, "year": 2014}, {"source": "53", "target": "77", "source_name": "popular music", "target_name": "rock music", "weight": 130.0, "year": 2014}, {"source": "53", "target": "78", "source_name": "popular music", "target_name": "hip hop", "weight": 11.0, "year": 2014}, {"source": "53", "target": "79", "source_name": "popular music", "target_name": "popular culture", "weight": 25.0, "year": 2014}, {"source": "53", "target": "80", "source_name": "popular music", "target_name": "folk music", "weight": 20.0, "year": 2014}, {"source": "53", "target": "82", "source_name": "popular music", "target_name": "heavy metal", "weight": 12.0, "year": 2014}, {"source": "53", "target": "83", "source_name": "popular music", "target_name": "folk rock", "weight": 3.0, "year": 2014}, {"source": "53", "target": "85", "source_name": "popular music", "target_name": "jewish music", "weight": 2.0, "year": 2014}, {"source": "53", "target": "87", "source_name": "popular music", "target_name": "music hall", "weight": 4.0, "year": 2014}, {"source": "53", "target": "88", "source_name": "popular music", "target_name": "oxford university press", "weight": 4.0, "year": 2014}, {"source": "53", "target": "89", "source_name": "popular music", "target_name": "electronic music", "weight": 9.0, "year": 2014}, {"source": "53", "target": "90", "source_name": "popular music", "target_name": "blues rock", "weight": 1.0, "year": 2014}, {"source": "54", "target": "55", "source_name": "american popular music", "target_name": "rock criticism", "weight": 1.0, "year": 2014}, {"source": "54", "target": "57", "source_name": "american popular music", "target_name": "north america", "weight": 2.0, "year": 2014}, {"source": "54", "target": "65", "source_name": "american popular music", "target_name": "country music", "weight": 5.0, "year": 2014}, {"source": "54", "target": "69", "source_name": "american popular music", "target_name": "classical music", "weight": 3.0, "year": 2014}, {"source": "54", "target": "70", "source_name": "american popular music", "target_name": "world war", "weight": 1.0, "year": 2014}, {"source": "54", "target": "71", "source_name": "american popular music", "target_name": "latin american", "weight": 1.0, "year": 2014}, {"source": "54", "target": "74", "source_name": "american popular music", "target_name": "united states", "weight": 5.0, "year": 2014}, {"source": "54", "target": "75", "source_name": "american popular music", "target_name": "world war ii", "weight": 1.0, "year": 2014}, {"source": "54", "target": "76", "source_name": "american popular music", "target_name": "los angeles", "weight": 1.0, "year": 2014}, {"source": "54", "target": "77", "source_name": "american popular music", "target_name": "rock music", "weight": 6.0, "year": 2014}, {"source": "54", "target": "78", "source_name": "american popular music", "target_name": "hip hop", "weight": 2.0, "year": 2014}, {"source": "54", "target": "79", "source_name": "american popular music", "target_name": "popular culture", "weight": 1.0, "year": 2014}, {"source": "54", "target": "80", "source_name": "american popular music", "target_name": "folk music", "weight": 1.0, "year": 2014}, {"source": "54", "target": "88", "source_name": "american popular music", "target_name": "oxford university press", "weight": 1.0, "year": 2014}, {"source": "54", "target": "89", "source_name": "american popular music", "target_name": "electronic music", "weight": 1.0, "year": 2014}, {"source": "55", "target": "56", "source_name": "rock criticism", "target_name": "bruce springsteen", "weight": 1.0, "year": 2014}, {"source": "55", "target": "57", "source_name": "rock criticism", "target_name": "north america", "weight": 1.0, "year": 2014}, {"source": "55", "target": "61", "source_name": "rock criticism", "target_name": "progressive rock", "weight": 2.0, "year": 2014}, {"source": "55", "target": "65", "source_name": "rock criticism", "target_name": "country music", "weight": 1.0, "year": 2014}, {"source": "55", "target": "69", "source_name": "rock criticism", "target_name": "classical music", "weight": 1.0, "year": 2014}, {"source": "55", "target": "74", "source_name": "rock criticism", "target_name": "united states", "weight": 2.0, "year": 2014}, {"source": "55", "target": "77", "source_name": "rock criticism", "target_name": "rock music", "weight": 5.0, "year": 2014}, {"source": "55", "target": "78", "source_name": "rock criticism", "target_name": "hip hop", "weight": 1.0, "year": 2014}, {"source": "55", "target": "79", "source_name": "rock criticism", "target_name": "popular culture", "weight": 1.0, "year": 2014}, {"source": "55", "target": "88", "source_name": "rock criticism", "target_name": "oxford university press", "weight": 1.0, "year": 2014}, {"source": "56", "target": "72", "source_name": "bruce springsteen", "target_name": "jimi hendrix", "weight": 1.0, "year": 2014}, {"source": "56", "target": "77", "source_name": "bruce springsteen", "target_name": "rock music", "weight": 2.0, "year": 2014}, {"source": "56", "target": "78", "source_name": "bruce springsteen", "target_name": "hip hop", "weight": 1.0, "year": 2014}, {"source": "56", "target": "79", "source_name": "bruce springsteen", "target_name": "popular culture", "weight": 2.0, "year": 2014}, {"source": "56", "target": "82", "source_name": "bruce springsteen", "target_name": "heavy metal", "weight": 1.0, "year": 2014}, {"source": "57", "target": "61", "source_name": "north america", "target_name": "progressive rock", "weight": 1.0, "year": 2014}, {"source": "57", "target": "65", "source_name": "north america", "target_name": "country music", "weight": 2.0, "year": 2014}, {"source": "57", "target": "71", "source_name": "north america", "target_name": "latin american", "weight": 1.0, "year": 2014}, {"source": "57", "target": "73", "source_name": "north america", "target_name": "southern rock", "weight": 1.0, "year": 2014}, {"source": "57", "target": "74", "source_name": "north america", "target_name": "united states", "weight": 3.0, "year": 2014}, {"source": "57", "target": "77", "source_name": "north america", "target_name": "rock music", "weight": 7.0, "year": 2014}, {"source": "57", "target": "78", "source_name": "north america", "target_name": "hip hop", "weight": 1.0, "year": 2014}, {"source": "57", "target": "80", "source_name": "north america", "target_name": "folk music", "weight": 2.0, "year": 2014}, {"source": "58", "target": "64", "source_name": "music therapy", "target_name": "english language", "weight": 1.0, "year": 2014}, {"source": "58", "target": "74", "source_name": "music therapy", "target_name": "united states", "weight": 1.0, "year": 2014}, {"source": "58", "target": "77", "source_name": "music therapy", "target_name": "rock music", "weight": 3.0, "year": 2014}, {"source": "59", "target": "69", "source_name": "college students", "target_name": "classical music", "weight": 1.0, "year": 2014}, {"source": "59", "target": "74", "source_name": "college students", "target_name": "united states", "weight": 1.0, "year": 2014}, {"source": "59", "target": "77", "source_name": "college students", "target_name": "rock music", "weight": 5.0, "year": 2014}, {"source": "59", "target": "82", "source_name": "college students", "target_name": "heavy metal", "weight": 2.0, "year": 2014}, {"source": "60", "target": "62", "source_name": "cultural studies", "target_name": "led zeppelin", "weight": 1.0, "year": 2014}, {"source": "60", "target": "71", "source_name": "cultural studies", "target_name": "latin american", "weight": 1.0, "year": 2014}, {"source": "60", "target": "74", "source_name": "cultural studies", "target_name": "united states", "weight": 1.0, "year": 2014}, {"source": "60", "target": "76", "source_name": "cultural studies", "target_name": "los angeles", "weight": 1.0, "year": 2014}, {"source": "60", "target": "77", "source_name": "cultural studies", "target_name": "rock music", "weight": 7.0, "year": 2014}, {"source": "60", "target": "79", "source_name": "cultural studies", "target_name": "popular culture", "weight": 5.0, "year": 2014}, {"source": "60", "target": "80", "source_name": "cultural studies", "target_name": "folk music", "weight": 1.0, "year": 2014}, {"source": "60", "target": "81", "source_name": "cultural studies", "target_name": "avant garde", "weight": 1.0, "year": 2014}, {"source": "60", "target": "85", "source_name": "cultural studies", "target_name": "jewish music", "weight": 1.0, "year": 2014}, {"source": "60", "target": "87", "source_name": "cultural studies", "target_name": "music hall", "weight": 1.0, "year": 2014}, {"source": "60", "target": "88", "source_name": "cultural studies", "target_name": "oxford university press", "weight": 4.0, "year": 2014}, {"source": "60", "target": "89", "source_name": "cultural studies", "target_name": "electronic music", "weight": 1.0, "year": 2014}, {"source": "61", "target": "69", "source_name": "progressive rock", "target_name": "classical music", "weight": 2.0, "year": 2014}, {"source": "61", "target": "72", "source_name": "progressive rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2014}, {"source": "61", "target": "74", "source_name": "progressive rock", "target_name": "united states", "weight": 3.0, "year": 2014}, {"source": "61", "target": "77", "source_name": "progressive rock", "target_name": "rock music", "weight": 21.0, "year": 2014}, {"source": "61", "target": "80", "source_name": "progressive rock", "target_name": "folk music", "weight": 2.0, "year": 2014}, {"source": "61", "target": "82", "source_name": "progressive rock", "target_name": "heavy metal", "weight": 2.0, "year": 2014}, {"source": "61", "target": "83", "source_name": "progressive rock", "target_name": "folk rock", "weight": 1.0, "year": 2014}, {"source": "61", "target": "88", "source_name": "progressive rock", "target_name": "oxford university press", "weight": 1.0, "year": 2014}, {"source": "61", "target": "89", "source_name": "progressive rock", "target_name": "electronic music", "weight": 1.0, "year": 2014}, {"source": "62", "target": "67", "source_name": "led zeppelin", "target_name": "rock art", "weight": 1.0, "year": 2014}, {"source": "62", "target": "69", "source_name": "led zeppelin", "target_name": "classical music", "weight": 1.0, "year": 2014}, {"source": "62", "target": "77", "source_name": "led zeppelin", "target_name": "rock music", "weight": 2.0, "year": 2014}, {"source": "62", "target": "78", "source_name": "led zeppelin", "target_name": "hip hop", "weight": 1.0, "year": 2014}, {"source": "62", "target": "80", "source_name": "led zeppelin", "target_name": "folk music", "weight": 1.0, "year": 2014}, {"source": "62", "target": "82", "source_name": "led zeppelin", "target_name": "heavy metal", "weight": 1.0, "year": 2014}, {"source": "62", "target": "88", "source_name": "led zeppelin", "target_name": "oxford university press", "weight": 1.0, "year": 2014}, {"source": "64", "target": "66", "source_name": "english language", "target_name": "hong kong", "weight": 1.0, "year": 2014}, {"source": "64", "target": "67", "source_name": "english language", "target_name": "rock art", "weight": 1.0, "year": 2014}, {"source": "64", "target": "70", "source_name": "english language", "target_name": "world war", "weight": 1.0, "year": 2014}, {"source": "64", "target": "74", "source_name": "english language", "target_name": "united states", "weight": 1.0, "year": 2014}, {"source": "64", "target": "77", "source_name": "english language", "target_name": "rock music", "weight": 2.0, "year": 2014}, {"source": "64", "target": "79", "source_name": "english language", "target_name": "popular culture", "weight": 1.0, "year": 2014}, {"source": "64", "target": "83", "source_name": "english language", "target_name": "folk rock", "weight": 1.0, "year": 2014}, {"source": "65", "target": "69", "source_name": "country music", "target_name": "classical music", "weight": 4.0, "year": 2014}, {"source": "65", "target": "72", "source_name": "country music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2014}, {"source": "65", "target": "73", "source_name": "country music", "target_name": "southern rock", "weight": 2.0, "year": 2014}, {"source": "65", "target": "74", "source_name": "country music", "target_name": "united states", "weight": 3.0, "year": 2014}, {"source": "65", "target": "77", "source_name": "country music", "target_name": "rock music", "weight": 5.0, "year": 2014}, {"source": "65", "target": "78", "source_name": "country music", "target_name": "hip hop", "weight": 1.0, "year": 2014}, {"source": "65", "target": "79", "source_name": "country music", "target_name": "popular culture", "weight": 2.0, "year": 2014}, {"source": "65", "target": "80", "source_name": "country music", "target_name": "folk music", "weight": 3.0, "year": 2014}, {"source": "65", "target": "82", "source_name": "country music", "target_name": "heavy metal", "weight": 1.0, "year": 2014}, {"source": "65", "target": "89", "source_name": "country music", "target_name": "electronic music", "weight": 2.0, "year": 2014}, {"source": "66", "target": "67", "source_name": "hong kong", "target_name": "rock art", "weight": 1.0, "year": 2014}, {"source": "66", "target": "77", "source_name": "hong kong", "target_name": "rock music", "weight": 2.0, "year": 2014}, {"source": "66", "target": "78", "source_name": "hong kong", "target_name": "hip hop", "weight": 1.0, "year": 2014}, {"source": "66", "target": "80", "source_name": "hong kong", "target_name": "folk music", "weight": 1.0, "year": 2014}, {"source": "66", "target": "83", "source_name": "hong kong", "target_name": "folk rock", "weight": 1.0, "year": 2014}, {"source": "66", "target": "85", "source_name": "hong kong", "target_name": "jewish music", "weight": 1.0, "year": 2014}, {"source": "67", "target": "74", "source_name": "rock art", "target_name": "united states", "weight": 1.0, "year": 2014}, {"source": "67", "target": "77", "source_name": "rock art", "target_name": "rock music", "weight": 7.0, "year": 2014}, {"source": "67", "target": "79", "source_name": "rock art", "target_name": "popular culture", "weight": 1.0, "year": 2014}, {"source": "67", "target": "80", "source_name": "rock art", "target_name": "folk music", "weight": 1.0, "year": 2014}, {"source": "67", "target": "82", "source_name": "rock art", "target_name": "heavy metal", "weight": 1.0, "year": 2014}, {"source": "67", "target": "83", "source_name": "rock art", "target_name": "folk rock", "weight": 1.0, "year": 2014}, {"source": "67", "target": "89", "source_name": "rock art", "target_name": "electronic music", "weight": 1.0, "year": 2014}, {"source": "68", "target": "77", "source_name": "hearing loss", "target_name": "rock music", "weight": 3.0, "year": 2014}, {"source": "69", "target": "70", "source_name": "classical music", "target_name": "world war", "weight": 1.0, "year": 2014}, {"source": "69", "target": "71", "source_name": "classical music", "target_name": "latin american", "weight": 1.0, "year": 2014}, {"source": "69", "target": "72", "source_name": "classical music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2014}, {"source": "69", "target": "74", "source_name": "classical music", "target_name": "united states", "weight": 4.0, "year": 2014}, {"source": "69", "target": "76", "source_name": "classical music", "target_name": "los angeles", "weight": 1.0, "year": 2014}, {"source": "69", "target": "77", "source_name": "classical music", "target_name": "rock music", "weight": 33.0, "year": 2014}, {"source": "69", "target": "78", "source_name": "classical music", "target_name": "hip hop", "weight": 2.0, "year": 2014}, {"source": "69", "target": "79", "source_name": "classical music", "target_name": "popular culture", "weight": 3.0, "year": 2014}, {"source": "69", "target": "80", "source_name": "classical music", "target_name": "folk music", "weight": 5.0, "year": 2014}, {"source": "69", "target": "82", "source_name": "classical music", "target_name": "heavy metal", "weight": 3.0, "year": 2014}, {"source": "69", "target": "87", "source_name": "classical music", "target_name": "music hall", "weight": 2.0, "year": 2014}, {"source": "69", "target": "88", "source_name": "classical music", "target_name": "oxford university press", "weight": 1.0, "year": 2014}, {"source": "69", "target": "89", "source_name": "classical music", "target_name": "electronic music", "weight": 2.0, "year": 2014}, {"source": "70", "target": "74", "source_name": "world war", "target_name": "united states", "weight": 2.0, "year": 2014}, {"source": "70", "target": "75", "source_name": "world war", "target_name": "world war ii", "weight": 4.0, "year": 2014}, {"source": "70", "target": "77", "source_name": "world war", "target_name": "rock music", "weight": 6.0, "year": 2014}, {"source": "70", "target": "79", "source_name": "world war", "target_name": "popular culture", "weight": 1.0, "year": 2014}, {"source": "70", "target": "80", "source_name": "world war", "target_name": "folk music", "weight": 1.0, "year": 2014}, {"source": "70", "target": "87", "source_name": "world war", "target_name": "music hall", "weight": 1.0, "year": 2014}, {"source": "70", "target": "89", "source_name": "world war", "target_name": "electronic music", "weight": 1.0, "year": 2014}, {"source": "71", "target": "74", "source_name": "latin american", "target_name": "united states", "weight": 3.0, "year": 2014}, {"source": "71", "target": "76", "source_name": "latin american", "target_name": "los angeles", "weight": 2.0, "year": 2014}, {"source": "71", "target": "77", "source_name": "latin american", "target_name": "rock music", "weight": 4.0, "year": 2014}, {"source": "71", "target": "79", "source_name": "latin american", "target_name": "popular culture", "weight": 1.0, "year": 2014}, {"source": "72", "target": "74", "source_name": "jimi hendrix", "target_name": "united states", "weight": 1.0, "year": 2014}, {"source": "72", "target": "77", "source_name": "jimi hendrix", "target_name": "rock music", "weight": 7.0, "year": 2014}, {"source": "72", "target": "79", "source_name": "jimi hendrix", "target_name": "popular culture", "weight": 2.0, "year": 2014}, {"source": "72", "target": "80", "source_name": "jimi hendrix", "target_name": "folk music", "weight": 1.0, "year": 2014}, {"source": "72", "target": "89", "source_name": "jimi hendrix", "target_name": "electronic music", "weight": 1.0, "year": 2014}, {"source": "73", "target": "77", "source_name": "southern rock", "target_name": "rock music", "weight": 1.0, "year": 2014}, {"source": "73", "target": "80", "source_name": "southern rock", "target_name": "folk music", "weight": 1.0, "year": 2014}, {"source": "74", "target": "76", "source_name": "united states", "target_name": "los angeles", "weight": 1.0, "year": 2014}, {"source": "74", "target": "77", "source_name": "united states", "target_name": "rock music", "weight": 14.0, "year": 2014}, {"source": "74", "target": "78", "source_name": "united states", "target_name": "hip hop", "weight": 1.0, "year": 2014}, {"source": "74", "target": "79", "source_name": "united states", "target_name": "popular culture", "weight": 3.0, "year": 2014}, {"source": "74", "target": "80", "source_name": "united states", "target_name": "folk music", "weight": 4.0, "year": 2014}, {"source": "74", "target": "88", "source_name": "united states", "target_name": "oxford university press", "weight": 1.0, "year": 2014}, {"source": "74", "target": "89", "source_name": "united states", "target_name": "electronic music", "weight": 3.0, "year": 2014}, {"source": "75", "target": "76", "source_name": "world war ii", "target_name": "los angeles", "weight": 1.0, "year": 2014}, {"source": "75", "target": "77", "source_name": "world war ii", "target_name": "rock music", "weight": 3.0, "year": 2014}, {"source": "75", "target": "80", "source_name": "world war ii", "target_name": "folk music", "weight": 1.0, "year": 2014}, {"source": "76", "target": "77", "source_name": "los angeles", "target_name": "rock music", "weight": 7.0, "year": 2014}, {"source": "76", "target": "79", "source_name": "los angeles", "target_name": "popular culture", "weight": 1.0, "year": 2014}, {"source": "76", "target": "80", "source_name": "los angeles", "target_name": "folk music", "weight": 1.0, "year": 2014}, {"source": "77", "target": "78", "source_name": "rock music", "target_name": "hip hop", "weight": 5.0, "year": 2014}, {"source": "77", "target": "79", "source_name": "rock music", "target_name": "popular culture", "weight": 21.0, "year": 2014}, {"source": "77", "target": "80", "source_name": "rock music", "target_name": "folk music", "weight": 12.0, "year": 2014}, {"source": "77", "target": "82", "source_name": "rock music", "target_name": "heavy metal", "weight": 15.0, "year": 2014}, {"source": "77", "target": "83", "source_name": "rock music", "target_name": "folk rock", "weight": 2.0, "year": 2014}, {"source": "77", "target": "87", "source_name": "rock music", "target_name": "music hall", "weight": 5.0, "year": 2014}, {"source": "77", "target": "88", "source_name": "rock music", "target_name": "oxford university press", "weight": 2.0, "year": 2014}, {"source": "77", "target": "89", "source_name": "rock music", "target_name": "electronic music", "weight": 6.0, "year": 2014}, {"source": "78", "target": "79", "source_name": "hip hop", "target_name": "popular culture", "weight": 2.0, "year": 2014}, {"source": "78", "target": "80", "source_name": "hip hop", "target_name": "folk music", "weight": 3.0, "year": 2014}, {"source": "78", "target": "82", "source_name": "hip hop", "target_name": "heavy metal", "weight": 2.0, "year": 2014}, {"source": "78", "target": "85", "source_name": "hip hop", "target_name": "jewish music", "weight": 1.0, "year": 2014}, {"source": "78", "target": "88", "source_name": "hip hop", "target_name": "oxford university press", "weight": 1.0, "year": 2014}, {"source": "78", "target": "90", "source_name": "hip hop", "target_name": "blues rock", "weight": 1.0, "year": 2014}, {"source": "79", "target": "80", "source_name": "popular culture", "target_name": "folk music", "weight": 3.0, "year": 2014}, {"source": "79", "target": "82", "source_name": "popular culture", "target_name": "heavy metal", "weight": 2.0, "year": 2014}, {"source": "79", "target": "85", "source_name": "popular culture", "target_name": "jewish music", "weight": 1.0, "year": 2014}, {"source": "79", "target": "87", "source_name": "popular culture", "target_name": "music hall", "weight": 3.0, "year": 2014}, {"source": "79", "target": "88", "source_name": "popular culture", "target_name": "oxford university press", "weight": 1.0, "year": 2014}, {"source": "79", "target": "89", "source_name": "popular culture", "target_name": "electronic music", "weight": 1.0, "year": 2014}, {"source": "80", "target": "82", "source_name": "folk music", "target_name": "heavy metal", "weight": 1.0, "year": 2014}, {"source": "80", "target": "85", "source_name": "folk music", "target_name": "jewish music", "weight": 2.0, "year": 2014}, {"source": "80", "target": "87", "source_name": "folk music", "target_name": "music hall", "weight": 3.0, "year": 2014}, {"source": "80", "target": "88", "source_name": "folk music", "target_name": "oxford university press", "weight": 1.0, "year": 2014}, {"source": "80", "target": "89", "source_name": "folk music", "target_name": "electronic music", "weight": 3.0, "year": 2014}, {"source": "81", "target": "88", "source_name": "avant garde", "target_name": "oxford university press", "weight": 1.0, "year": 2014}, {"source": "82", "target": "83", "source_name": "heavy metal", "target_name": "folk rock", "weight": 2.0, "year": 2014}, {"source": "85", "target": "88", "source_name": "jewish music", "target_name": "oxford university press", "weight": 1.0, "year": 2014}, {"source": "88", "target": "89", "source_name": "oxford university press", "target_name": "electronic music", "weight": 1.0, "year": 2014}]}, {"2015": [{"source": "1", "target": "6", "source_name": "rock star", "target_name": "elvis presley", "weight": 1.0, "year": 2015}, {"source": "1", "target": "7", "source_name": "rock star", "target_name": "nineteenth century", "weight": 1.0, "year": 2015}, {"source": "1", "target": "9", "source_name": "rock star", "target_name": "compact disc", "weight": 1.0, "year": 2015}, {"source": "1", "target": "16", "source_name": "rock star", "target_name": "bob dylan", "weight": 1.0, "year": 2015}, {"source": "1", "target": "19", "source_name": "rock star", "target_name": "music video", "weight": 1.0, "year": 2015}, {"source": "1", "target": "23", "source_name": "rock star", "target_name": "electronic dance music", "weight": 1.0, "year": 2015}, {"source": "1", "target": "24", "source_name": "rock star", "target_name": "punk rock", "weight": 1.0, "year": 2015}, {"source": "1", "target": "28", "source_name": "rock star", "target_name": "high school", "weight": 1.0, "year": 2015}, {"source": "1", "target": "29", "source_name": "rock star", "target_name": "rolling stone", "weight": 2.0, "year": 2015}, {"source": "1", "target": "36", "source_name": "rock star", "target_name": "music industry", "weight": 3.0, "year": 2015}, {"source": "1", "target": "41", "source_name": "rock star", "target_name": "youth culture", "weight": 2.0, "year": 2015}, {"source": "1", "target": "42", "source_name": "rock star", "target_name": "simon frith", "weight": 1.0, "year": 2015}, {"source": "1", "target": "48", "source_name": "rock star", "target_name": "pop music", "weight": 4.0, "year": 2015}, {"source": "1", "target": "51", "source_name": "rock star", "target_name": "cultural identity", "weight": 1.0, "year": 2015}, {"source": "1", "target": "53", "source_name": "rock star", "target_name": "popular music", "weight": 6.0, "year": 2015}, {"source": "1", "target": "56", "source_name": "rock star", "target_name": "bruce springsteen", "weight": 1.0, "year": 2015}, {"source": "1", "target": "57", "source_name": "rock star", "target_name": "north america", "weight": 1.0, "year": 2015}, {"source": "1", "target": "60", "source_name": "rock star", "target_name": "cultural studies", "weight": 1.0, "year": 2015}, {"source": "1", "target": "69", "source_name": "rock star", "target_name": "classical music", "weight": 1.0, "year": 2015}, {"source": "1", "target": "74", "source_name": "rock star", "target_name": "united states", "weight": 1.0, "year": 2015}, {"source": "1", "target": "77", "source_name": "rock star", "target_name": "rock music", "weight": 9.0, "year": 2015}, {"source": "1", "target": "79", "source_name": "rock star", "target_name": "popular culture", "weight": 2.0, "year": 2015}, {"source": "1", "target": "82", "source_name": "rock star", "target_name": "heavy metal", "weight": 3.0, "year": 2015}, {"source": "2", "target": "3", "source_name": "indie rock", "target_name": "glam rock", "weight": 1.0, "year": 2015}, {"source": "2", "target": "19", "source_name": "indie rock", "target_name": "music video", "weight": 1.0, "year": 2015}, {"source": "2", "target": "20", "source_name": "indie rock", "target_name": "garage rock", "weight": 1.0, "year": 2015}, {"source": "2", "target": "24", "source_name": "indie rock", "target_name": "punk rock", "weight": 1.0, "year": 2015}, {"source": "2", "target": "27", "source_name": "indie rock", "target_name": "pop rock", "weight": 1.0, "year": 2015}, {"source": "2", "target": "30", "source_name": "indie rock", "target_name": "rock band", "weight": 1.0, "year": 2015}, {"source": "2", "target": "36", "source_name": "indie rock", "target_name": "music industry", "weight": 1.0, "year": 2015}, {"source": "2", "target": "44", "source_name": "indie rock", "target_name": "alternative rock", "weight": 1.0, "year": 2015}, {"source": "2", "target": "47", "source_name": "indie rock", "target_name": "hard rock", "weight": 1.0, "year": 2015}, {"source": "2", "target": "48", "source_name": "indie rock", "target_name": "pop music", "weight": 2.0, "year": 2015}, {"source": "2", "target": "51", "source_name": "indie rock", "target_name": "cultural identity", "weight": 1.0, "year": 2015}, {"source": "2", "target": "53", "source_name": "indie rock", "target_name": "popular music", "weight": 2.0, "year": 2015}, {"source": "2", "target": "67", "source_name": "indie rock", "target_name": "rock art", "weight": 2.0, "year": 2015}, {"source": "2", "target": "69", "source_name": "indie rock", "target_name": "classical music", "weight": 1.0, "year": 2015}, {"source": "2", "target": "72", "source_name": "indie rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2015}, {"source": "2", "target": "74", "source_name": "indie rock", "target_name": "united states", "weight": 1.0, "year": 2015}, {"source": "2", "target": "77", "source_name": "indie rock", "target_name": "rock music", "weight": 6.0, "year": 2015}, {"source": "2", "target": "78", "source_name": "indie rock", "target_name": "hip hop", "weight": 1.0, "year": 2015}, {"source": "2", "target": "80", "source_name": "indie rock", "target_name": "folk music", "weight": 1.0, "year": 2015}, {"source": "3", "target": "20", "source_name": "glam rock", "target_name": "garage rock", "weight": 1.0, "year": 2015}, {"source": "3", "target": "24", "source_name": "glam rock", "target_name": "punk rock", "weight": 2.0, "year": 2015}, {"source": "3", "target": "27", "source_name": "glam rock", "target_name": "pop rock", "weight": 1.0, "year": 2015}, {"source": "3", "target": "41", "source_name": "glam rock", "target_name": "youth culture", "weight": 1.0, "year": 2015}, {"source": "3", "target": "44", "source_name": "glam rock", "target_name": "alternative rock", "weight": 1.0, "year": 2015}, {"source": "3", "target": "47", "source_name": "glam rock", "target_name": "hard rock", "weight": 1.0, "year": 2015}, {"source": "3", "target": "53", "source_name": "glam rock", "target_name": "popular music", "weight": 1.0, "year": 2015}, {"source": "3", "target": "77", "source_name": "glam rock", "target_name": "rock music", "weight": 2.0, "year": 2015}, {"source": "3", "target": "79", "source_name": "glam rock", "target_name": "popular culture", "weight": 2.0, "year": 2015}, {"source": "3", "target": "87", "source_name": "glam rock", "target_name": "music hall", "weight": 1.0, "year": 2015}, {"source": "4", "target": "7", "source_name": "gregorian chant", "target_name": "nineteenth century", "weight": 1.0, "year": 2015}, {"source": "4", "target": "9", "source_name": "gregorian chant", "target_name": "compact disc", "weight": 1.0, "year": 2015}, {"source": "4", "target": "10", "source_name": "gregorian chant", "target_name": "african american", "weight": 1.0, "year": 2015}, {"source": "4", "target": "19", "source_name": "gregorian chant", "target_name": "music video", "weight": 1.0, "year": 2015}, {"source": "4", "target": "22", "source_name": "gregorian chant", "target_name": "chamber music", "weight": 1.0, "year": 2015}, {"source": "4", "target": "36", "source_name": "gregorian chant", "target_name": "music industry", "weight": 1.0, "year": 2015}, {"source": "4", "target": "37", "source_name": "gregorian chant", "target_name": "middle ages", "weight": 1.0, "year": 2015}, {"source": "4", "target": "38", "source_name": "gregorian chant", "target_name": "summary additional listening", "weight": 1.0, "year": 2015}, {"source": "4", "target": "40", "source_name": "gregorian chant", "target_name": "musical instruments", "weight": 1.0, "year": 2015}, {"source": "4", "target": "48", "source_name": "gregorian chant", "target_name": "pop music", "weight": 1.0, "year": 2015}, {"source": "4", "target": "52", "source_name": "gregorian chant", "target_name": "folk song", "weight": 1.0, "year": 2015}, {"source": "4", "target": "53", "source_name": "gregorian chant", "target_name": "popular music", "weight": 1.0, "year": 2015}, {"source": "4", "target": "54", "source_name": "gregorian chant", "target_name": "american popular music", "weight": 1.0, "year": 2015}, {"source": "4", "target": "65", "source_name": "gregorian chant", "target_name": "country music", "weight": 1.0, "year": 2015}, {"source": "4", "target": "69", "source_name": "gregorian chant", "target_name": "classical music", "weight": 1.0, "year": 2015}, {"source": "4", "target": "74", "source_name": "gregorian chant", "target_name": "united states", "weight": 1.0, "year": 2015}, {"source": "4", "target": "80", "source_name": "gregorian chant", "target_name": "folk music", "weight": 1.0, "year": 2015}, {"source": "4", "target": "89", "source_name": "gregorian chant", "target_name": "electronic music", "weight": 1.0, "year": 2015}, {"source": "5", "target": "12", "source_name": "jesus christ superstar", "target_name": "rock opera", "weight": 3.0, "year": 2015}, {"source": "5", "target": "15", "source_name": "jesus christ superstar", "target_name": "musical theatre", "weight": 3.0, "year": 2015}, {"source": "5", "target": "33", "source_name": "jesus christ superstar", "target_name": "jesus christ", "weight": 5.0, "year": 2015}, {"source": "5", "target": "34", "source_name": "jesus christ superstar", "target_name": "mass media", "weight": 1.0, "year": 2015}, {"source": "5", "target": "41", "source_name": "jesus christ superstar", "target_name": "youth culture", "weight": 1.0, "year": 2015}, {"source": "5", "target": "53", "source_name": "jesus christ superstar", "target_name": "popular music", "weight": 1.0, "year": 2015}, {"source": "5", "target": "77", "source_name": "jesus christ superstar", "target_name": "rock music", "weight": 7.0, "year": 2015}, {"source": "6", "target": "10", "source_name": "elvis presley", "target_name": "african american", "weight": 1.0, "year": 2015}, {"source": "6", "target": "16", "source_name": "elvis presley", "target_name": "bob dylan", "weight": 4.0, "year": 2015}, {"source": "6", "target": "17", "source_name": "elvis presley", "target_name": "civil rights", "weight": 1.0, "year": 2015}, {"source": "6", "target": "23", "source_name": "elvis presley", "target_name": "electronic dance music", "weight": 1.0, "year": 2015}, {"source": "6", "target": "29", "source_name": "elvis presley", "target_name": "rolling stone", "weight": 2.0, "year": 2015}, {"source": "6", "target": "36", "source_name": "elvis presley", "target_name": "music industry", "weight": 3.0, "year": 2015}, {"source": "6", "target": "40", "source_name": "elvis presley", "target_name": "musical instruments", "weight": 1.0, "year": 2015}, {"source": "6", "target": "41", "source_name": "elvis presley", "target_name": "youth culture", "weight": 1.0, "year": 2015}, {"source": "6", "target": "42", "source_name": "elvis presley", "target_name": "simon frith", "weight": 2.0, "year": 2015}, {"source": "6", "target": "47", "source_name": "elvis presley", "target_name": "hard rock", "weight": 1.0, "year": 2015}, {"source": "6", "target": "48", "source_name": "elvis presley", "target_name": "pop music", "weight": 1.0, "year": 2015}, {"source": "6", "target": "49", "source_name": "elvis presley", "target_name": "music theory", "weight": 1.0, "year": 2015}, {"source": "6", "target": "51", "source_name": "elvis presley", "target_name": "cultural identity", "weight": 1.0, "year": 2015}, {"source": "6", "target": "53", "source_name": "elvis presley", "target_name": "popular music", "weight": 9.0, "year": 2015}, {"source": "6", "target": "54", "source_name": "elvis presley", "target_name": "american popular music", "weight": 3.0, "year": 2015}, {"source": "6", "target": "56", "source_name": "elvis presley", "target_name": "bruce springsteen", "weight": 2.0, "year": 2015}, {"source": "6", "target": "60", "source_name": "elvis presley", "target_name": "cultural studies", "weight": 1.0, "year": 2015}, {"source": "6", "target": "67", "source_name": "elvis presley", "target_name": "rock art", "weight": 1.0, "year": 2015}, {"source": "6", "target": "70", "source_name": "elvis presley", "target_name": "world war", "weight": 1.0, "year": 2015}, {"source": "6", "target": "72", "source_name": "elvis presley", "target_name": "jimi hendrix", "weight": 1.0, "year": 2015}, {"source": "6", "target": "74", "source_name": "elvis presley", "target_name": "united states", "weight": 2.0, "year": 2015}, {"source": "6", "target": "75", "source_name": "elvis presley", "target_name": "world war ii", "weight": 1.0, "year": 2015}, {"source": "6", "target": "77", "source_name": "elvis presley", "target_name": "rock music", "weight": 5.0, "year": 2015}, {"source": "6", "target": "78", "source_name": "elvis presley", "target_name": "hip hop", "weight": 1.0, "year": 2015}, {"source": "6", "target": "79", "source_name": "elvis presley", "target_name": "popular culture", "weight": 2.0, "year": 2015}, {"source": "6", "target": "80", "source_name": "elvis presley", "target_name": "folk music", "weight": 1.0, "year": 2015}, {"source": "6", "target": "82", "source_name": "elvis presley", "target_name": "heavy metal", "weight": 1.0, "year": 2015}, {"source": "7", "target": "9", "source_name": "nineteenth century", "target_name": "compact disc", "weight": 1.0, "year": 2015}, {"source": "7", "target": "10", "source_name": "nineteenth century", "target_name": "african american", "weight": 1.0, "year": 2015}, {"source": "7", "target": "19", "source_name": "nineteenth century", "target_name": "music video", "weight": 1.0, "year": 2015}, {"source": "7", "target": "22", "source_name": "nineteenth century", "target_name": "chamber music", "weight": 1.0, "year": 2015}, {"source": "7", "target": "34", "source_name": "nineteenth century", "target_name": "mass media", "weight": 1.0, "year": 2015}, {"source": "7", "target": "36", "source_name": "nineteenth century", "target_name": "music industry", "weight": 2.0, "year": 2015}, {"source": "7", "target": "38", "source_name": "nineteenth century", "target_name": "summary additional listening", "weight": 1.0, "year": 2015}, {"source": "7", "target": "40", "source_name": "nineteenth century", "target_name": "musical instruments", "weight": 1.0, "year": 2015}, {"source": "7", "target": "43", "source_name": "nineteenth century", "target_name": "music education", "weight": 1.0, "year": 2015}, {"source": "7", "target": "45", "source_name": "nineteenth century", "target_name": "double bass", "weight": 2.0, "year": 2015}, {"source": "7", "target": "48", "source_name": "nineteenth century", "target_name": "pop music", "weight": 1.0, "year": 2015}, {"source": "7", "target": "50", "source_name": "nineteenth century", "target_name": "hollywood film", "weight": 1.0, "year": 2015}, {"source": "7", "target": "52", "source_name": "nineteenth century", "target_name": "folk song", "weight": 3.0, "year": 2015}, {"source": "7", "target": "53", "source_name": "nineteenth century", "target_name": "popular music", "weight": 4.0, "year": 2015}, {"source": "7", "target": "54", "source_name": "nineteenth century", "target_name": "american popular music", "weight": 1.0, "year": 2015}, {"source": "7", "target": "65", "source_name": "nineteenth century", "target_name": "country music", "weight": 1.0, "year": 2015}, {"source": "7", "target": "67", "source_name": "nineteenth century", "target_name": "rock art", "weight": 1.0, "year": 2015}, {"source": "7", "target": "69", "source_name": "nineteenth century", "target_name": "classical music", "weight": 4.0, "year": 2015}, {"source": "7", "target": "70", "source_name": "nineteenth century", "target_name": "world war", "weight": 2.0, "year": 2015}, {"source": "7", "target": "74", "source_name": "nineteenth century", "target_name": "united states", "weight": 2.0, "year": 2015}, {"source": "7", "target": "77", "source_name": "nineteenth century", "target_name": "rock music", "weight": 4.0, "year": 2015}, {"source": "7", "target": "79", "source_name": "nineteenth century", "target_name": "popular culture", "weight": 1.0, "year": 2015}, {"source": "7", "target": "80", "source_name": "nineteenth century", "target_name": "folk music", "weight": 3.0, "year": 2015}, {"source": "7", "target": "85", "source_name": "nineteenth century", "target_name": "jewish music", "weight": 1.0, "year": 2015}, {"source": "7", "target": "87", "source_name": "nineteenth century", "target_name": "music hall", "weight": 1.0, "year": 2015}, {"source": "7", "target": "89", "source_name": "nineteenth century", "target_name": "electronic music", "weight": 1.0, "year": 2015}, {"source": "8", "target": "20", "source_name": "christian rock", "target_name": "garage rock", "weight": 1.0, "year": 2015}, {"source": "8", "target": "36", "source_name": "christian rock", "target_name": "music industry", "weight": 1.0, "year": 2015}, {"source": "8", "target": "44", "source_name": "christian rock", "target_name": "alternative rock", "weight": 1.0, "year": 2015}, {"source": "8", "target": "53", "source_name": "christian rock", "target_name": "popular music", "weight": 2.0, "year": 2015}, {"source": "8", "target": "57", "source_name": "christian rock", "target_name": "north america", "weight": 1.0, "year": 2015}, {"source": "8", "target": "65", "source_name": "christian rock", "target_name": "country music", "weight": 1.0, "year": 2015}, {"source": "8", "target": "73", "source_name": "christian rock", "target_name": "southern rock", "weight": 1.0, "year": 2015}, {"source": "8", "target": "77", "source_name": "christian rock", "target_name": "rock music", "weight": 2.0, "year": 2015}, {"source": "8", "target": "79", "source_name": "christian rock", "target_name": "popular culture", "weight": 1.0, "year": 2015}, {"source": "8", "target": "80", "source_name": "christian rock", "target_name": "folk music", "weight": 1.0, "year": 2015}, {"source": "9", "target": "10", "source_name": "compact disc", "target_name": "african american", "weight": 1.0, "year": 2015}, {"source": "9", "target": "11", "source_name": "compact disc", "target_name": "south africa", "weight": 1.0, "year": 2015}, {"source": "9", "target": "18", "source_name": "compact disc", "target_name": "middle class", "weight": 1.0, "year": 2015}, {"source": "9", "target": "19", "source_name": "compact disc", "target_name": "music video", "weight": 1.0, "year": 2015}, {"source": "9", "target": "24", "source_name": "compact disc", "target_name": "punk rock", "weight": 1.0, "year": 2015}, {"source": "9", "target": "25", "source_name": "compact disc", "target_name": "russian rock", "weight": 1.0, "year": 2015}, {"source": "9", "target": "28", "source_name": "compact disc", "target_name": "high school", "weight": 1.0, "year": 2015}, {"source": "9", "target": "29", "source_name": "compact disc", "target_name": "rolling stone", "weight": 1.0, "year": 2015}, {"source": "9", "target": "30", "source_name": "compact disc", "target_name": "rock band", "weight": 1.0, "year": 2015}, {"source": "9", "target": "36", "source_name": "compact disc", "target_name": "music industry", "weight": 1.0, "year": 2015}, {"source": "9", "target": "37", "source_name": "compact disc", "target_name": "middle ages", "weight": 1.0, "year": 2015}, {"source": "9", "target": "46", "source_name": "compact disc", "target_name": "music festival", "weight": 1.0, "year": 2015}, {"source": "9", "target": "48", "source_name": "compact disc", "target_name": "pop music", "weight": 1.0, "year": 2015}, {"source": "9", "target": "51", "source_name": "compact disc", "target_name": "cultural identity", "weight": 1.0, "year": 2015}, {"source": "9", "target": "53", "source_name": "compact disc", "target_name": "popular music", "weight": 4.0, "year": 2015}, {"source": "9", "target": "61", "source_name": "compact disc", "target_name": "progressive rock", "weight": 1.0, "year": 2015}, {"source": "9", "target": "66", "source_name": "compact disc", "target_name": "hong kong", "weight": 1.0, "year": 2015}, {"source": "9", "target": "74", "source_name": "compact disc", "target_name": "united states", "weight": 1.0, "year": 2015}, {"source": "9", "target": "77", "source_name": "compact disc", "target_name": "rock music", "weight": 2.0, "year": 2015}, {"source": "9", "target": "78", "source_name": "compact disc", "target_name": "hip hop", "weight": 1.0, "year": 2015}, {"source": "9", "target": "79", "source_name": "compact disc", "target_name": "popular culture", "weight": 1.0, "year": 2015}, {"source": "9", "target": "80", "source_name": "compact disc", "target_name": "folk music", "weight": 3.0, "year": 2015}, {"source": "9", "target": "85", "source_name": "compact disc", "target_name": "jewish music", "weight": 2.0, "year": 2015}, {"source": "9", "target": "89", "source_name": "compact disc", "target_name": "electronic music", "weight": 1.0, "year": 2015}, {"source": "10", "target": "11", "source_name": "african american", "target_name": "south africa", "weight": 1.0, "year": 2015}, {"source": "10", "target": "15", "source_name": "african american", "target_name": "musical theatre", "weight": 1.0, "year": 2015}, {"source": "10", "target": "17", "source_name": "african american", "target_name": "civil rights", "weight": 2.0, "year": 2015}, {"source": "10", "target": "19", "source_name": "african american", "target_name": "music video", "weight": 1.0, "year": 2015}, {"source": "10", "target": "21", "source_name": "african american", "target_name": "social protest", "weight": 1.0, "year": 2015}, {"source": "10", "target": "22", "source_name": "african american", "target_name": "chamber music", "weight": 1.0, "year": 2015}, {"source": "10", "target": "23", "source_name": "african american", "target_name": "electronic dance music", "weight": 1.0, "year": 2015}, {"source": "10", "target": "24", "source_name": "african american", "target_name": "punk rock", "weight": 2.0, "year": 2015}, {"source": "10", "target": "36", "source_name": "african american", "target_name": "music industry", "weight": 2.0, "year": 2015}, {"source": "10", "target": "38", "source_name": "african american", "target_name": "summary additional listening", "weight": 1.0, "year": 2015}, {"source": "10", "target": "40", "source_name": "african american", "target_name": "musical instruments", "weight": 1.0, "year": 2015}, {"source": "10", "target": "52", "source_name": "african american", "target_name": "folk song", "weight": 1.0, "year": 2015}, {"source": "10", "target": "53", "source_name": "african american", "target_name": "popular music", "weight": 7.0, "year": 2015}, {"source": "10", "target": "54", "source_name": "african american", "target_name": "american popular music", "weight": 1.0, "year": 2015}, {"source": "10", "target": "61", "source_name": "african american", "target_name": "progressive rock", "weight": 1.0, "year": 2015}, {"source": "10", "target": "65", "source_name": "african american", "target_name": "country music", "weight": 1.0, "year": 2015}, {"source": "10", "target": "69", "source_name": "african american", "target_name": "classical music", "weight": 1.0, "year": 2015}, {"source": "10", "target": "74", "source_name": "african american", "target_name": "united states", "weight": 5.0, "year": 2015}, {"source": "10", "target": "75", "source_name": "african american", "target_name": "world war ii", "weight": 1.0, "year": 2015}, {"source": "10", "target": "77", "source_name": "african american", "target_name": "rock music", "weight": 2.0, "year": 2015}, {"source": "10", "target": "78", "source_name": "african american", "target_name": "hip hop", "weight": 1.0, "year": 2015}, {"source": "10", "target": "79", "source_name": "african american", "target_name": "popular culture", "weight": 2.0, "year": 2015}, {"source": "10", "target": "80", "source_name": "african american", "target_name": "folk music", "weight": 4.0, "year": 2015}, {"source": "10", "target": "82", "source_name": "african american", "target_name": "heavy metal", "weight": 1.0, "year": 2015}, {"source": "10", "target": "89", "source_name": "african american", "target_name": "electronic music", "weight": 1.0, "year": 2015}, {"source": "11", "target": "17", "source_name": "south africa", "target_name": "civil rights", "weight": 1.0, "year": 2015}, {"source": "11", "target": "21", "source_name": "south africa", "target_name": "social protest", "weight": 2.0, "year": 2015}, {"source": "11", "target": "23", "source_name": "south africa", "target_name": "electronic dance music", "weight": 1.0, "year": 2015}, {"source": "11", "target": "25", "source_name": "south africa", "target_name": "russian rock", "weight": 1.0, "year": 2015}, {"source": "11", "target": "36", "source_name": "south africa", "target_name": "music industry", "weight": 1.0, "year": 2015}, {"source": "11", "target": "43", "source_name": "south africa", "target_name": "music education", "weight": 1.0, "year": 2015}, {"source": "11", "target": "46", "source_name": "south africa", "target_name": "music festival", "weight": 3.0, "year": 2015}, {"source": "11", "target": "53", "source_name": "south africa", "target_name": "popular music", "weight": 4.0, "year": 2015}, {"source": "11", "target": "61", "source_name": "south africa", "target_name": "progressive rock", "weight": 1.0, "year": 2015}, {"source": "11", "target": "66", "source_name": "south africa", "target_name": "hong kong", "weight": 1.0, "year": 2015}, {"source": "11", "target": "74", "source_name": "south africa", "target_name": "united states", "weight": 3.0, "year": 2015}, {"source": "11", "target": "78", "source_name": "south africa", "target_name": "hip hop", "weight": 1.0, "year": 2015}, {"source": "11", "target": "80", "source_name": "south africa", "target_name": "folk music", "weight": 3.0, "year": 2015}, {"source": "11", "target": "85", "source_name": "south africa", "target_name": "jewish music", "weight": 1.0, "year": 2015}, {"source": "11", "target": "87", "source_name": "south africa", "target_name": "music hall", "weight": 1.0, "year": 2015}, {"source": "11", "target": "88", "source_name": "south africa", "target_name": "oxford university press", "weight": 1.0, "year": 2015}, {"source": "12", "target": "15", "source_name": "rock opera", "target_name": "musical theatre", "weight": 3.0, "year": 2015}, {"source": "12", "target": "33", "source_name": "rock opera", "target_name": "jesus christ", "weight": 2.0, "year": 2015}, {"source": "12", "target": "41", "source_name": "rock opera", "target_name": "youth culture", "weight": 1.0, "year": 2015}, {"source": "12", "target": "53", "source_name": "rock opera", "target_name": "popular music", "weight": 1.0, "year": 2015}, {"source": "12", "target": "57", "source_name": "rock opera", "target_name": "north america", "weight": 1.0, "year": 2015}, {"source": "12", "target": "77", "source_name": "rock opera", "target_name": "rock music", "weight": 2.0, "year": 2015}, {"source": "12", "target": "79", "source_name": "rock opera", "target_name": "popular culture", "weight": 1.0, "year": 2015}, {"source": "15", "target": "33", "source_name": "musical theatre", "target_name": "jesus christ", "weight": 3.0, "year": 2015}, {"source": "15", "target": "53", "source_name": "musical theatre", "target_name": "popular music", "weight": 4.0, "year": 2015}, {"source": "15", "target": "54", "source_name": "musical theatre", "target_name": "american popular music", "weight": 3.0, "year": 2015}, {"source": "15", "target": "57", "source_name": "musical theatre", "target_name": "north america", "weight": 2.0, "year": 2015}, {"source": "15", "target": "70", "source_name": "musical theatre", "target_name": "world war", "weight": 1.0, "year": 2015}, {"source": "15", "target": "74", "source_name": "musical theatre", "target_name": "united states", "weight": 1.0, "year": 2015}, {"source": "15", "target": "77", "source_name": "musical theatre", "target_name": "rock music", "weight": 7.0, "year": 2015}, {"source": "15", "target": "87", "source_name": "musical theatre", "target_name": "music hall", "weight": 1.0, "year": 2015}, {"source": "16", "target": "29", "source_name": "bob dylan", "target_name": "rolling stone", "weight": 4.0, "year": 2015}, {"source": "16", "target": "30", "source_name": "bob dylan", "target_name": "rock band", "weight": 2.0, "year": 2015}, {"source": "16", "target": "36", "source_name": "bob dylan", "target_name": "music industry", "weight": 3.0, "year": 2015}, {"source": "16", "target": "42", "source_name": "bob dylan", "target_name": "simon frith", "weight": 1.0, "year": 2015}, {"source": "16", "target": "44", "source_name": "bob dylan", "target_name": "alternative rock", "weight": 1.0, "year": 2015}, {"source": "16", "target": "48", "source_name": "bob dylan", "target_name": "pop music", "weight": 3.0, "year": 2015}, {"source": "16", "target": "52", "source_name": "bob dylan", "target_name": "folk song", "weight": 1.0, "year": 2015}, {"source": "16", "target": "53", "source_name": "bob dylan", "target_name": "popular music", "weight": 10.0, "year": 2015}, {"source": "16", "target": "54", "source_name": "bob dylan", "target_name": "american popular music", "weight": 1.0, "year": 2015}, {"source": "16", "target": "56", "source_name": "bob dylan", "target_name": "bruce springsteen", "weight": 1.0, "year": 2015}, {"source": "16", "target": "69", "source_name": "bob dylan", "target_name": "classical music", "weight": 1.0, "year": 2015}, {"source": "16", "target": "70", "source_name": "bob dylan", "target_name": "world war", "weight": 1.0, "year": 2015}, {"source": "16", "target": "72", "source_name": "bob dylan", "target_name": "jimi hendrix", "weight": 2.0, "year": 2015}, {"source": "16", "target": "75", "source_name": "bob dylan", "target_name": "world war ii", "weight": 1.0, "year": 2015}, {"source": "16", "target": "77", "source_name": "bob dylan", "target_name": "rock music", "weight": 7.0, "year": 2015}, {"source": "16", "target": "79", "source_name": "bob dylan", "target_name": "popular culture", "weight": 3.0, "year": 2015}, {"source": "16", "target": "80", "source_name": "bob dylan", "target_name": "folk music", "weight": 5.0, "year": 2015}, {"source": "17", "target": "21", "source_name": "civil rights", "target_name": "social protest", "weight": 1.0, "year": 2015}, {"source": "17", "target": "30", "source_name": "civil rights", "target_name": "rock band", "weight": 1.0, "year": 2015}, {"source": "17", "target": "41", "source_name": "civil rights", "target_name": "youth culture", "weight": 1.0, "year": 2015}, {"source": "17", "target": "53", "source_name": "civil rights", "target_name": "popular music", "weight": 4.0, "year": 2015}, {"source": "17", "target": "54", "source_name": "civil rights", "target_name": "american popular music", "weight": 1.0, "year": 2015}, {"source": "17", "target": "61", "source_name": "civil rights", "target_name": "progressive rock", "weight": 1.0, "year": 2015}, {"source": "17", "target": "70", "source_name": "civil rights", "target_name": "world war", "weight": 1.0, "year": 2015}, {"source": "17", "target": "73", "source_name": "civil rights", "target_name": "southern rock", "weight": 1.0, "year": 2015}, {"source": "17", "target": "74", "source_name": "civil rights", "target_name": "united states", "weight": 3.0, "year": 2015}, {"source": "17", "target": "75", "source_name": "civil rights", "target_name": "world war ii", "weight": 1.0, "year": 2015}, {"source": "17", "target": "77", "source_name": "civil rights", "target_name": "rock music", "weight": 3.0, "year": 2015}, {"source": "17", "target": "79", "source_name": "civil rights", "target_name": "popular culture", "weight": 1.0, "year": 2015}, {"source": "17", "target": "80", "source_name": "civil rights", "target_name": "folk music", "weight": 2.0, "year": 2015}, {"source": "18", "target": "19", "source_name": "middle class", "target_name": "music video", "weight": 1.0, "year": 2015}, {"source": "18", "target": "28", "source_name": "middle class", "target_name": "high school", "weight": 1.0, "year": 2015}, {"source": "18", "target": "30", "source_name": "middle class", "target_name": "rock band", "weight": 2.0, "year": 2015}, {"source": "18", "target": "48", "source_name": "middle class", "target_name": "pop music", "weight": 1.0, "year": 2015}, {"source": "18", "target": "53", "source_name": "middle class", "target_name": "popular music", "weight": 2.0, "year": 2015}, {"source": "18", "target": "61", "source_name": "middle class", "target_name": "progressive rock", "weight": 2.0, "year": 2015}, {"source": "18", "target": "77", "source_name": "middle class", "target_name": "rock music", "weight": 2.0, "year": 2015}, {"source": "19", "target": "22", "source_name": "music video", "target_name": "chamber music", "weight": 1.0, "year": 2015}, {"source": "19", "target": "28", "source_name": "music video", "target_name": "high school", "weight": 1.0, "year": 2015}, {"source": "19", "target": "30", "source_name": "music video", "target_name": "rock band", "weight": 3.0, "year": 2015}, {"source": "19", "target": "36", "source_name": "music video", "target_name": "music industry", "weight": 2.0, "year": 2015}, {"source": "19", "target": "38", "source_name": "music video", "target_name": "summary additional listening", "weight": 1.0, "year": 2015}, {"source": "19", "target": "40", "source_name": "music video", "target_name": "musical instruments", "weight": 1.0, "year": 2015}, {"source": "19", "target": "47", "source_name": "music video", "target_name": "hard rock", "weight": 1.0, "year": 2015}, {"source": "19", "target": "48", "source_name": "music video", "target_name": "pop music", "weight": 3.0, "year": 2015}, {"source": "19", "target": "49", "source_name": "music video", "target_name": "music theory", "weight": 1.0, "year": 2015}, {"source": "19", "target": "51", "source_name": "music video", "target_name": "cultural identity", "weight": 2.0, "year": 2015}, {"source": "19", "target": "52", "source_name": "music video", "target_name": "folk song", "weight": 1.0, "year": 2015}, {"source": "19", "target": "53", "source_name": "music video", "target_name": "popular music", "weight": 8.0, "year": 2015}, {"source": "19", "target": "54", "source_name": "music video", "target_name": "american popular music", "weight": 1.0, "year": 2015}, {"source": "19", "target": "61", "source_name": "music video", "target_name": "progressive rock", "weight": 1.0, "year": 2015}, {"source": "19", "target": "65", "source_name": "music video", "target_name": "country music", "weight": 4.0, "year": 2015}, {"source": "19", "target": "69", "source_name": "music video", "target_name": "classical music", "weight": 1.0, "year": 2015}, {"source": "19", "target": "72", "source_name": "music video", "target_name": "jimi hendrix", "weight": 1.0, "year": 2015}, {"source": "19", "target": "74", "source_name": "music video", "target_name": "united states", "weight": 2.0, "year": 2015}, {"source": "19", "target": "76", "source_name": "music video", "target_name": "los angeles", "weight": 1.0, "year": 2015}, {"source": "19", "target": "77", "source_name": "music video", "target_name": "rock music", "weight": 9.0, "year": 2015}, {"source": "19", "target": "78", "source_name": "music video", "target_name": "hip hop", "weight": 2.0, "year": 2015}, {"source": "19", "target": "80", "source_name": "music video", "target_name": "folk music", "weight": 1.0, "year": 2015}, {"source": "19", "target": "82", "source_name": "music video", "target_name": "heavy metal", "weight": 1.0, "year": 2015}, {"source": "19", "target": "89", "source_name": "music video", "target_name": "electronic music", "weight": 1.0, "year": 2015}, {"source": "19", "target": "90", "source_name": "music video", "target_name": "blues rock", "weight": 1.0, "year": 2015}, {"source": "20", "target": "24", "source_name": "garage rock", "target_name": "punk rock", "weight": 1.0, "year": 2015}, {"source": "20", "target": "27", "source_name": "garage rock", "target_name": "pop rock", "weight": 1.0, "year": 2015}, {"source": "20", "target": "29", "source_name": "garage rock", "target_name": "rolling stone", "weight": 1.0, "year": 2015}, {"source": "20", "target": "30", "source_name": "garage rock", "target_name": "rock band", "weight": 2.0, "year": 2015}, {"source": "20", "target": "43", "source_name": "garage rock", "target_name": "music education", "weight": 1.0, "year": 2015}, {"source": "20", "target": "44", "source_name": "garage rock", "target_name": "alternative rock", "weight": 2.0, "year": 2015}, {"source": "20", "target": "47", "source_name": "garage rock", "target_name": "hard rock", "weight": 1.0, "year": 2015}, {"source": "20", "target": "48", "source_name": "garage rock", "target_name": "pop music", "weight": 1.0, "year": 2015}, {"source": "20", "target": "53", "source_name": "garage rock", "target_name": "popular music", "weight": 4.0, "year": 2015}, {"source": "20", "target": "57", "source_name": "garage rock", "target_name": "north america", "weight": 1.0, "year": 2015}, {"source": "20", "target": "65", "source_name": "garage rock", "target_name": "country music", "weight": 1.0, "year": 2015}, {"source": "20", "target": "73", "source_name": "garage rock", "target_name": "southern rock", "weight": 1.0, "year": 2015}, {"source": "20", "target": "77", "source_name": "garage rock", "target_name": "rock music", "weight": 4.0, "year": 2015}, {"source": "20", "target": "80", "source_name": "garage rock", "target_name": "folk music", "weight": 1.0, "year": 2015}, {"source": "21", "target": "47", "source_name": "social protest", "target_name": "hard rock", "weight": 1.0, "year": 2015}, {"source": "21", "target": "48", "source_name": "social protest", "target_name": "pop music", "weight": 1.0, "year": 2015}, {"source": "21", "target": "53", "source_name": "social protest", "target_name": "popular music", "weight": 4.0, "year": 2015}, {"source": "21", "target": "57", "source_name": "social protest", "target_name": "north america", "weight": 2.0, "year": 2015}, {"source": "21", "target": "61", "source_name": "social protest", "target_name": "progressive rock", "weight": 1.0, "year": 2015}, {"source": "21", "target": "71", "source_name": "social protest", "target_name": "latin american", "weight": 1.0, "year": 2015}, {"source": "21", "target": "74", "source_name": "social protest", "target_name": "united states", "weight": 2.0, "year": 2015}, {"source": "21", "target": "77", "source_name": "social protest", "target_name": "rock music", "weight": 1.0, "year": 2015}, {"source": "21", "target": "80", "source_name": "social protest", "target_name": "folk music", "weight": 2.0, "year": 2015}, {"source": "21", "target": "82", "source_name": "social protest", "target_name": "heavy metal", "weight": 1.0, "year": 2015}, {"source": "21", "target": "87", "source_name": "social protest", "target_name": "music hall", "weight": 1.0, "year": 2015}, {"source": "22", "target": "35", "source_name": "chamber music", "target_name": "ancient greek", "weight": 1.0, "year": 2015}, {"source": "22", "target": "36", "source_name": "chamber music", "target_name": "music industry", "weight": 1.0, "year": 2015}, {"source": "22", "target": "38", "source_name": "chamber music", "target_name": "summary additional listening", "weight": 1.0, "year": 2015}, {"source": "22", "target": "40", "source_name": "chamber music", "target_name": "musical instruments", "weight": 1.0, "year": 2015}, {"source": "22", "target": "48", "source_name": "chamber music", "target_name": "pop music", "weight": 1.0, "year": 2015}, {"source": "22", "target": "52", "source_name": "chamber music", "target_name": "folk song", "weight": 1.0, "year": 2015}, {"source": "22", "target": "53", "source_name": "chamber music", "target_name": "popular music", "weight": 2.0, "year": 2015}, {"source": "22", "target": "54", "source_name": "chamber music", "target_name": "american popular music", "weight": 1.0, "year": 2015}, {"source": "22", "target": "65", "source_name": "chamber music", "target_name": "country music", "weight": 2.0, "year": 2015}, {"source": "22", "target": "69", "source_name": "chamber music", "target_name": "classical music", "weight": 3.0, "year": 2015}, {"source": "22", "target": "74", "source_name": "chamber music", "target_name": "united states", "weight": 1.0, "year": 2015}, {"source": "22", "target": "77", "source_name": "chamber music", "target_name": "rock music", "weight": 1.0, "year": 2015}, {"source": "22", "target": "79", "source_name": "chamber music", "target_name": "popular culture", "weight": 1.0, "year": 2015}, {"source": "22", "target": "80", "source_name": "chamber music", "target_name": "folk music", "weight": 2.0, "year": 2015}, {"source": "22", "target": "89", "source_name": "chamber music", "target_name": "electronic music", "weight": 3.0, "year": 2015}, {"source": "23", "target": "24", "source_name": "electronic dance music", "target_name": "punk rock", "weight": 1.0, "year": 2015}, {"source": "23", "target": "36", "source_name": "electronic dance music", "target_name": "music industry", "weight": 2.0, "year": 2015}, {"source": "23", "target": "42", "source_name": "electronic dance music", "target_name": "simon frith", "weight": 2.0, "year": 2015}, {"source": "23", "target": "47", "source_name": "electronic dance music", "target_name": "hard rock", "weight": 1.0, "year": 2015}, {"source": "23", "target": "53", "source_name": "electronic dance music", "target_name": "popular music", "weight": 9.0, "year": 2015}, {"source": "23", "target": "56", "source_name": "electronic dance music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2015}, {"source": "23", "target": "57", "source_name": "electronic dance music", "target_name": "north america", "weight": 1.0, "year": 2015}, {"source": "23", "target": "60", "source_name": "electronic dance music", "target_name": "cultural studies", "weight": 2.0, "year": 2015}, {"source": "23", "target": "67", "source_name": "electronic dance music", "target_name": "rock art", "weight": 1.0, "year": 2015}, {"source": "23", "target": "74", "source_name": "electronic dance music", "target_name": "united states", "weight": 2.0, "year": 2015}, {"source": "23", "target": "76", "source_name": "electronic dance music", "target_name": "los angeles", "weight": 1.0, "year": 2015}, {"source": "23", "target": "77", "source_name": "electronic dance music", "target_name": "rock music", "weight": 1.0, "year": 2015}, {"source": "23", "target": "78", "source_name": "electronic dance music", "target_name": "hip hop", "weight": 1.0, "year": 2015}, {"source": "23", "target": "79", "source_name": "electronic dance music", "target_name": "popular culture", "weight": 1.0, "year": 2015}, {"source": "23", "target": "82", "source_name": "electronic dance music", "target_name": "heavy metal", "weight": 3.0, "year": 2015}, {"source": "23", "target": "88", "source_name": "electronic dance music", "target_name": "oxford university press", "weight": 1.0, "year": 2015}, {"source": "23", "target": "89", "source_name": "electronic dance music", "target_name": "electronic music", "weight": 4.0, "year": 2015}, {"source": "24", "target": "27", "source_name": "punk rock", "target_name": "pop rock", "weight": 1.0, "year": 2015}, {"source": "24", "target": "30", "source_name": "punk rock", "target_name": "rock band", "weight": 1.0, "year": 2015}, {"source": "24", "target": "36", "source_name": "punk rock", "target_name": "music industry", "weight": 1.0, "year": 2015}, {"source": "24", "target": "41", "source_name": "punk rock", "target_name": "youth culture", "weight": 2.0, "year": 2015}, {"source": "24", "target": "42", "source_name": "punk rock", "target_name": "simon frith", "weight": 1.0, "year": 2015}, {"source": "24", "target": "44", "source_name": "punk rock", "target_name": "alternative rock", "weight": 4.0, "year": 2015}, {"source": "24", "target": "47", "source_name": "punk rock", "target_name": "hard rock", "weight": 5.0, "year": 2015}, {"source": "24", "target": "48", "source_name": "punk rock", "target_name": "pop music", "weight": 4.0, "year": 2015}, {"source": "24", "target": "51", "source_name": "punk rock", "target_name": "cultural identity", "weight": 1.0, "year": 2015}, {"source": "24", "target": "53", "source_name": "punk rock", "target_name": "popular music", "weight": 12.0, "year": 2015}, {"source": "24", "target": "57", "source_name": "punk rock", "target_name": "north america", "weight": 1.0, "year": 2015}, {"source": "24", "target": "61", "source_name": "punk rock", "target_name": "progressive rock", "weight": 2.0, "year": 2015}, {"source": "24", "target": "65", "source_name": "punk rock", "target_name": "country music", "weight": 1.0, "year": 2015}, {"source": "24", "target": "69", "source_name": "punk rock", "target_name": "classical music", "weight": 1.0, "year": 2015}, {"source": "24", "target": "74", "source_name": "punk rock", "target_name": "united states", "weight": 3.0, "year": 2015}, {"source": "24", "target": "77", "source_name": "punk rock", "target_name": "rock music", "weight": 12.0, "year": 2015}, {"source": "24", "target": "78", "source_name": "punk rock", "target_name": "hip hop", "weight": 1.0, "year": 2015}, {"source": "24", "target": "79", "source_name": "punk rock", "target_name": "popular culture", "weight": 1.0, "year": 2015}, {"source": "24", "target": "80", "source_name": "punk rock", "target_name": "folk music", "weight": 1.0, "year": 2015}, {"source": "24", "target": "82", "source_name": "punk rock", "target_name": "heavy metal", "weight": 6.0, "year": 2015}, {"source": "25", "target": "30", "source_name": "russian rock", "target_name": "rock band", "weight": 1.0, "year": 2015}, {"source": "25", "target": "37", "source_name": "russian rock", "target_name": "middle ages", "weight": 1.0, "year": 2015}, {"source": "25", "target": "46", "source_name": "russian rock", "target_name": "music festival", "weight": 1.0, "year": 2015}, {"source": "25", "target": "53", "source_name": "russian rock", "target_name": "popular music", "weight": 2.0, "year": 2015}, {"source": "25", "target": "66", "source_name": "russian rock", "target_name": "hong kong", "weight": 1.0, "year": 2015}, {"source": "25", "target": "77", "source_name": "russian rock", "target_name": "rock music", "weight": 2.0, "year": 2015}, {"source": "25", "target": "78", "source_name": "russian rock", "target_name": "hip hop", "weight": 1.0, "year": 2015}, {"source": "25", "target": "80", "source_name": "russian rock", "target_name": "folk music", "weight": 1.0, "year": 2015}, {"source": "25", "target": "85", "source_name": "russian rock", "target_name": "jewish music", "weight": 1.0, "year": 2015}, {"source": "26", "target": "43", "source_name": "information technology", "target_name": "music education", "weight": 1.0, "year": 2015}, {"source": "27", "target": "44", "source_name": "pop rock", "target_name": "alternative rock", "weight": 1.0, "year": 2015}, {"source": "27", "target": "47", "source_name": "pop rock", "target_name": "hard rock", "weight": 1.0, "year": 2015}, {"source": "27", "target": "48", "source_name": "pop rock", "target_name": "pop music", "weight": 1.0, "year": 2015}, {"source": "27", "target": "53", "source_name": "pop rock", "target_name": "popular music", "weight": 1.0, "year": 2015}, {"source": "27", "target": "64", "source_name": "pop rock", "target_name": "english language", "weight": 1.0, "year": 2015}, {"source": "27", "target": "65", "source_name": "pop rock", "target_name": "country music", "weight": 1.0, "year": 2015}, {"source": "27", "target": "66", "source_name": "pop rock", "target_name": "hong kong", "weight": 1.0, "year": 2015}, {"source": "27", "target": "67", "source_name": "pop rock", "target_name": "rock art", "weight": 1.0, "year": 2015}, {"source": "27", "target": "77", "source_name": "pop rock", "target_name": "rock music", "weight": 1.0, "year": 2015}, {"source": "27", "target": "83", "source_name": "pop rock", "target_name": "folk rock", "weight": 1.0, "year": 2015}, {"source": "28", "target": "30", "source_name": "high school", "target_name": "rock band", "weight": 1.0, "year": 2015}, {"source": "28", "target": "37", "source_name": "high school", "target_name": "middle ages", "weight": 1.0, "year": 2015}, {"source": "28", "target": "48", "source_name": "high school", "target_name": "pop music", "weight": 1.0, "year": 2015}, {"source": "28", "target": "61", "source_name": "high school", "target_name": "progressive rock", "weight": 1.0, "year": 2015}, {"source": "28", "target": "77", "source_name": "high school", "target_name": "rock music", "weight": 5.0, "year": 2015}, {"source": "28", "target": "82", "source_name": "high school", "target_name": "heavy metal", "weight": 1.0, "year": 2015}, {"source": "29", "target": "30", "source_name": "rolling stone", "target_name": "rock band", "weight": 1.0, "year": 2015}, {"source": "29", "target": "36", "source_name": "rolling stone", "target_name": "music industry", "weight": 2.0, "year": 2015}, {"source": "29", "target": "42", "source_name": "rolling stone", "target_name": "simon frith", "weight": 1.0, "year": 2015}, {"source": "29", "target": "44", "source_name": "rolling stone", "target_name": "alternative rock", "weight": 1.0, "year": 2015}, {"source": "29", "target": "48", "source_name": "rolling stone", "target_name": "pop music", "weight": 4.0, "year": 2015}, {"source": "29", "target": "53", "source_name": "rolling stone", "target_name": "popular music", "weight": 8.0, "year": 2015}, {"source": "29", "target": "55", "source_name": "rolling stone", "target_name": "rock criticism", "weight": 4.0, "year": 2015}, {"source": "29", "target": "56", "source_name": "rolling stone", "target_name": "bruce springsteen", "weight": 2.0, "year": 2015}, {"source": "29", "target": "62", "source_name": "rolling stone", "target_name": "led zeppelin", "weight": 1.0, "year": 2015}, {"source": "29", "target": "72", "source_name": "rolling stone", "target_name": "jimi hendrix", "weight": 2.0, "year": 2015}, {"source": "29", "target": "74", "source_name": "rolling stone", "target_name": "united states", "weight": 1.0, "year": 2015}, {"source": "29", "target": "77", "source_name": "rolling stone", "target_name": "rock music", "weight": 9.0, "year": 2015}, {"source": "29", "target": "79", "source_name": "rolling stone", "target_name": "popular culture", "weight": 3.0, "year": 2015}, {"source": "29", "target": "80", "source_name": "rolling stone", "target_name": "folk music", "weight": 1.0, "year": 2015}, {"source": "29", "target": "87", "source_name": "rolling stone", "target_name": "music hall", "weight": 2.0, "year": 2015}, {"source": "30", "target": "36", "source_name": "rock band", "target_name": "music industry", "weight": 2.0, "year": 2015}, {"source": "30", "target": "37", "source_name": "rock band", "target_name": "middle ages", "weight": 2.0, "year": 2015}, {"source": "30", "target": "41", "source_name": "rock band", "target_name": "youth culture", "weight": 1.0, "year": 2015}, {"source": "30", "target": "43", "source_name": "rock band", "target_name": "music education", "weight": 3.0, "year": 2015}, {"source": "30", "target": "44", "source_name": "rock band", "target_name": "alternative rock", "weight": 1.0, "year": 2015}, {"source": "30", "target": "47", "source_name": "rock band", "target_name": "hard rock", "weight": 1.0, "year": 2015}, {"source": "30", "target": "48", "source_name": "rock band", "target_name": "pop music", "weight": 1.0, "year": 2015}, {"source": "30", "target": "52", "source_name": "rock band", "target_name": "folk song", "weight": 2.0, "year": 2015}, {"source": "30", "target": "53", "source_name": "rock band", "target_name": "popular music", "weight": 20.0, "year": 2015}, {"source": "30", "target": "54", "source_name": "rock band", "target_name": "american popular music", "weight": 1.0, "year": 2015}, {"source": "30", "target": "61", "source_name": "rock band", "target_name": "progressive rock", "weight": 9.0, "year": 2015}, {"source": "30", "target": "65", "source_name": "rock band", "target_name": "country music", "weight": 1.0, "year": 2015}, {"source": "30", "target": "67", "source_name": "rock band", "target_name": "rock art", "weight": 1.0, "year": 2015}, {"source": "30", "target": "69", "source_name": "rock band", "target_name": "classical music", "weight": 3.0, "year": 2015}, {"source": "30", "target": "72", "source_name": "rock band", "target_name": "jimi hendrix", "weight": 2.0, "year": 2015}, {"source": "30", "target": "73", "source_name": "rock band", "target_name": "southern rock", "weight": 2.0, "year": 2015}, {"source": "30", "target": "74", "source_name": "rock band", "target_name": "united states", "weight": 2.0, "year": 2015}, {"source": "30", "target": "76", "source_name": "rock band", "target_name": "los angeles", "weight": 1.0, "year": 2015}, {"source": "30", "target": "77", "source_name": "rock band", "target_name": "rock music", "weight": 32.0, "year": 2015}, {"source": "30", "target": "79", "source_name": "rock band", "target_name": "popular culture", "weight": 1.0, "year": 2015}, {"source": "30", "target": "80", "source_name": "rock band", "target_name": "folk music", "weight": 2.0, "year": 2015}, {"source": "30", "target": "82", "source_name": "rock band", "target_name": "heavy metal", "weight": 2.0, "year": 2015}, {"source": "30", "target": "83", "source_name": "rock band", "target_name": "folk rock", "weight": 1.0, "year": 2015}, {"source": "30", "target": "87", "source_name": "rock band", "target_name": "music hall", "weight": 1.0, "year": 2015}, {"source": "31", "target": "69", "source_name": "post modernism", "target_name": "classical music", "weight": 1.0, "year": 2015}, {"source": "32", "target": "43", "source_name": "higher education", "target_name": "music education", "weight": 3.0, "year": 2015}, {"source": "33", "target": "53", "source_name": "jesus christ", "target_name": "popular music", "weight": 1.0, "year": 2015}, {"source": "33", "target": "70", "source_name": "jesus christ", "target_name": "world war", "weight": 1.0, "year": 2015}, {"source": "33", "target": "77", "source_name": "jesus christ", "target_name": "rock music", "weight": 4.0, "year": 2015}, {"source": "34", "target": "36", "source_name": "mass media", "target_name": "music industry", "weight": 1.0, "year": 2015}, {"source": "34", "target": "40", "source_name": "mass media", "target_name": "musical instruments", "weight": 1.0, "year": 2015}, {"source": "34", "target": "41", "source_name": "mass media", "target_name": "youth culture", "weight": 1.0, "year": 2015}, {"source": "34", "target": "43", "source_name": "mass media", "target_name": "music education", "weight": 2.0, "year": 2015}, {"source": "34", "target": "46", "source_name": "mass media", "target_name": "music festival", "weight": 1.0, "year": 2015}, {"source": "34", "target": "48", "source_name": "mass media", "target_name": "pop music", "weight": 2.0, "year": 2015}, {"source": "34", "target": "51", "source_name": "mass media", "target_name": "cultural identity", "weight": 1.0, "year": 2015}, {"source": "34", "target": "52", "source_name": "mass media", "target_name": "folk song", "weight": 2.0, "year": 2015}, {"source": "34", "target": "53", "source_name": "mass media", "target_name": "popular music", "weight": 6.0, "year": 2015}, {"source": "34", "target": "65", "source_name": "mass media", "target_name": "country music", "weight": 1.0, "year": 2015}, {"source": "34", "target": "66", "source_name": "mass media", "target_name": "hong kong", "weight": 1.0, "year": 2015}, {"source": "34", "target": "67", "source_name": "mass media", "target_name": "rock art", "weight": 1.0, "year": 2015}, {"source": "34", "target": "69", "source_name": "mass media", "target_name": "classical music", "weight": 1.0, "year": 2015}, {"source": "34", "target": "77", "source_name": "mass media", "target_name": "rock music", "weight": 4.0, "year": 2015}, {"source": "34", "target": "79", "source_name": "mass media", "target_name": "popular culture", "weight": 1.0, "year": 2015}, {"source": "35", "target": "43", "source_name": "ancient greek", "target_name": "music education", "weight": 1.0, "year": 2015}, {"source": "35", "target": "65", "source_name": "ancient greek", "target_name": "country music", "weight": 1.0, "year": 2015}, {"source": "35", "target": "77", "source_name": "ancient greek", "target_name": "rock music", "weight": 1.0, "year": 2015}, {"source": "35", "target": "80", "source_name": "ancient greek", "target_name": "folk music", "weight": 1.0, "year": 2015}, {"source": "35", "target": "89", "source_name": "ancient greek", "target_name": "electronic music", "weight": 1.0, "year": 2015}, {"source": "36", "target": "38", "source_name": "music industry", "target_name": "summary additional listening", "weight": 1.0, "year": 2015}, {"source": "36", "target": "40", "source_name": "music industry", "target_name": "musical instruments", "weight": 1.0, "year": 2015}, {"source": "36", "target": "41", "source_name": "music industry", "target_name": "youth culture", "weight": 2.0, "year": 2015}, {"source": "36", "target": "42", "source_name": "music industry", "target_name": "simon frith", "weight": 2.0, "year": 2015}, {"source": "36", "target": "43", "source_name": "music industry", "target_name": "music education", "weight": 2.0, "year": 2015}, {"source": "36", "target": "44", "source_name": "music industry", "target_name": "alternative rock", "weight": 1.0, "year": 2015}, {"source": "36", "target": "46", "source_name": "music industry", "target_name": "music festival", "weight": 1.0, "year": 2015}, {"source": "36", "target": "47", "source_name": "music industry", "target_name": "hard rock", "weight": 3.0, "year": 2015}, {"source": "36", "target": "48", "source_name": "music industry", "target_name": "pop music", "weight": 10.0, "year": 2015}, {"source": "36", "target": "49", "source_name": "music industry", "target_name": "music theory", "weight": 1.0, "year": 2015}, {"source": "36", "target": "50", "source_name": "music industry", "target_name": "hollywood film", "weight": 1.0, "year": 2015}, {"source": "36", "target": "51", "source_name": "music industry", "target_name": "cultural identity", "weight": 2.0, "year": 2015}, {"source": "36", "target": "52", "source_name": "music industry", "target_name": "folk song", "weight": 1.0, "year": 2015}, {"source": "36", "target": "53", "source_name": "music industry", "target_name": "popular music", "weight": 31.0, "year": 2015}, {"source": "36", "target": "54", "source_name": "music industry", "target_name": "american popular music", "weight": 3.0, "year": 2015}, {"source": "36", "target": "55", "source_name": "music industry", "target_name": "rock criticism", "weight": 3.0, "year": 2015}, {"source": "36", "target": "56", "source_name": "music industry", "target_name": "bruce springsteen", "weight": 2.0, "year": 2015}, {"source": "36", "target": "60", "source_name": "music industry", "target_name": "cultural studies", "weight": 2.0, "year": 2015}, {"source": "36", "target": "61", "source_name": "music industry", "target_name": "progressive rock", "weight": 3.0, "year": 2015}, {"source": "36", "target": "62", "source_name": "music industry", "target_name": "led zeppelin", "weight": 1.0, "year": 2015}, {"source": "36", "target": "64", "source_name": "music industry", "target_name": "english language", "weight": 1.0, "year": 2015}, {"source": "36", "target": "65", "source_name": "music industry", "target_name": "country music", "weight": 2.0, "year": 2015}, {"source": "36", "target": "66", "source_name": "music industry", "target_name": "hong kong", "weight": 1.0, "year": 2015}, {"source": "36", "target": "67", "source_name": "music industry", "target_name": "rock art", "weight": 1.0, "year": 2015}, {"source": "36", "target": "68", "source_name": "music industry", "target_name": "hearing loss", "weight": 1.0, "year": 2015}, {"source": "36", "target": "69", "source_name": "music industry", "target_name": "classical music", "weight": 6.0, "year": 2015}, {"source": "36", "target": "70", "source_name": "music industry", "target_name": "world war", "weight": 2.0, "year": 2015}, {"source": "36", "target": "72", "source_name": "music industry", "target_name": "jimi hendrix", "weight": 4.0, "year": 2015}, {"source": "36", "target": "74", "source_name": "music industry", "target_name": "united states", "weight": 6.0, "year": 2015}, {"source": "36", "target": "75", "source_name": "music industry", "target_name": "world war ii", "weight": 3.0, "year": 2015}, {"source": "36", "target": "76", "source_name": "music industry", "target_name": "los angeles", "weight": 2.0, "year": 2015}, {"source": "36", "target": "77", "source_name": "music industry", "target_name": "rock music", "weight": 23.0, "year": 2015}, {"source": "36", "target": "78", "source_name": "music industry", "target_name": "hip hop", "weight": 5.0, "year": 2015}, {"source": "36", "target": "79", "source_name": "music industry", "target_name": "popular culture", "weight": 5.0, "year": 2015}, {"source": "36", "target": "80", "source_name": "music industry", "target_name": "folk music", "weight": 5.0, "year": 2015}, {"source": "36", "target": "82", "source_name": "music industry", "target_name": "heavy metal", "weight": 2.0, "year": 2015}, {"source": "36", "target": "83", "source_name": "music industry", "target_name": "folk rock", "weight": 1.0, "year": 2015}, {"source": "36", "target": "87", "source_name": "music industry", "target_name": "music hall", "weight": 1.0, "year": 2015}, {"source": "36", "target": "88", "source_name": "music industry", "target_name": "oxford university press", "weight": 2.0, "year": 2015}, {"source": "36", "target": "89", "source_name": "music industry", "target_name": "electronic music", "weight": 2.0, "year": 2015}, {"source": "37", "target": "44", "source_name": "middle ages", "target_name": "alternative rock", "weight": 1.0, "year": 2015}, {"source": "37", "target": "58", "source_name": "middle ages", "target_name": "music therapy", "weight": 1.0, "year": 2015}, {"source": "37", "target": "61", "source_name": "middle ages", "target_name": "progressive rock", "weight": 1.0, "year": 2015}, {"source": "37", "target": "69", "source_name": "middle ages", "target_name": "classical music", "weight": 1.0, "year": 2015}, {"source": "37", "target": "77", "source_name": "middle ages", "target_name": "rock music", "weight": 3.0, "year": 2015}, {"source": "37", "target": "80", "source_name": "middle ages", "target_name": "folk music", "weight": 2.0, "year": 2015}, {"source": "38", "target": "40", "source_name": "summary additional listening", "target_name": "musical instruments", "weight": 1.0, "year": 2015}, {"source": "38", "target": "52", "source_name": "summary additional listening", "target_name": "folk song", "weight": 1.0, "year": 2015}, {"source": "38", "target": "53", "source_name": "summary additional listening", "target_name": "popular music", "weight": 1.0, "year": 2015}, {"source": "38", "target": "54", "source_name": "summary additional listening", "target_name": "american popular music", "weight": 1.0, "year": 2015}, {"source": "38", "target": "65", "source_name": "summary additional listening", "target_name": "country music", "weight": 1.0, "year": 2015}, {"source": "38", "target": "69", "source_name": "summary additional listening", "target_name": "classical music", "weight": 1.0, "year": 2015}, {"source": "38", "target": "74", "source_name": "summary additional listening", "target_name": "united states", "weight": 1.0, "year": 2015}, {"source": "38", "target": "80", "source_name": "summary additional listening", "target_name": "folk music", "weight": 1.0, "year": 2015}, {"source": "38", "target": "89", "source_name": "summary additional listening", "target_name": "electronic music", "weight": 1.0, "year": 2015}, {"source": "40", "target": "43", "source_name": "musical instruments", "target_name": "music education", "weight": 1.0, "year": 2015}, {"source": "40", "target": "49", "source_name": "musical instruments", "target_name": "music theory", "weight": 1.0, "year": 2015}, {"source": "40", "target": "52", "source_name": "musical instruments", "target_name": "folk song", "weight": 1.0, "year": 2015}, {"source": "40", "target": "53", "source_name": "musical instruments", "target_name": "popular music", "weight": 2.0, "year": 2015}, {"source": "40", "target": "54", "source_name": "musical instruments", "target_name": "american popular music", "weight": 2.0, "year": 2015}, {"source": "40", "target": "65", "source_name": "musical instruments", "target_name": "country music", "weight": 1.0, "year": 2015}, {"source": "40", "target": "69", "source_name": "musical instruments", "target_name": "classical music", "weight": 1.0, "year": 2015}, {"source": "40", "target": "70", "source_name": "musical instruments", "target_name": "world war", "weight": 1.0, "year": 2015}, {"source": "40", "target": "74", "source_name": "musical instruments", "target_name": "united states", "weight": 2.0, "year": 2015}, {"source": "40", "target": "75", "source_name": "musical instruments", "target_name": "world war ii", "weight": 1.0, "year": 2015}, {"source": "40", "target": "80", "source_name": "musical instruments", "target_name": "folk music", "weight": 1.0, "year": 2015}, {"source": "40", "target": "89", "source_name": "musical instruments", "target_name": "electronic music", "weight": 2.0, "year": 2015}, {"source": "41", "target": "47", "source_name": "youth culture", "target_name": "hard rock", "weight": 1.0, "year": 2015}, {"source": "41", "target": "48", "source_name": "youth culture", "target_name": "pop music", "weight": 4.0, "year": 2015}, {"source": "41", "target": "51", "source_name": "youth culture", "target_name": "cultural identity", "weight": 2.0, "year": 2015}, {"source": "41", "target": "53", "source_name": "youth culture", "target_name": "popular music", "weight": 7.0, "year": 2015}, {"source": "41", "target": "57", "source_name": "youth culture", "target_name": "north america", "weight": 1.0, "year": 2015}, {"source": "41", "target": "60", "source_name": "youth culture", "target_name": "cultural studies", "weight": 2.0, "year": 2015}, {"source": "41", "target": "61", "source_name": "youth culture", "target_name": "progressive rock", "weight": 1.0, "year": 2015}, {"source": "41", "target": "66", "source_name": "youth culture", "target_name": "hong kong", "weight": 1.0, "year": 2015}, {"source": "41", "target": "74", "source_name": "youth culture", "target_name": "united states", "weight": 2.0, "year": 2015}, {"source": "41", "target": "75", "source_name": "youth culture", "target_name": "world war ii", "weight": 1.0, "year": 2015}, {"source": "41", "target": "77", "source_name": "youth culture", "target_name": "rock music", "weight": 9.0, "year": 2015}, {"source": "41", "target": "80", "source_name": "youth culture", "target_name": "folk music", "weight": 1.0, "year": 2015}, {"source": "42", "target": "47", "source_name": "simon frith", "target_name": "hard rock", "weight": 1.0, "year": 2015}, {"source": "42", "target": "48", "source_name": "simon frith", "target_name": "pop music", "weight": 6.0, "year": 2015}, {"source": "42", "target": "49", "source_name": "simon frith", "target_name": "music theory", "weight": 1.0, "year": 2015}, {"source": "42", "target": "51", "source_name": "simon frith", "target_name": "cultural identity", "weight": 1.0, "year": 2015}, {"source": "42", "target": "53", "source_name": "simon frith", "target_name": "popular music", "weight": 6.0, "year": 2015}, {"source": "42", "target": "55", "source_name": "simon frith", "target_name": "rock criticism", "weight": 2.0, "year": 2015}, {"source": "42", "target": "56", "source_name": "simon frith", "target_name": "bruce springsteen", "weight": 1.0, "year": 2015}, {"source": "42", "target": "57", "source_name": "simon frith", "target_name": "north america", "weight": 1.0, "year": 2015}, {"source": "42", "target": "60", "source_name": "simon frith", "target_name": "cultural studies", "weight": 3.0, "year": 2015}, {"source": "42", "target": "61", "source_name": "simon frith", "target_name": "progressive rock", "weight": 1.0, "year": 2015}, {"source": "42", "target": "65", "source_name": "simon frith", "target_name": "country music", "weight": 1.0, "year": 2015}, {"source": "42", "target": "72", "source_name": "simon frith", "target_name": "jimi hendrix", "weight": 1.0, "year": 2015}, {"source": "42", "target": "76", "source_name": "simon frith", "target_name": "los angeles", "weight": 1.0, "year": 2015}, {"source": "42", "target": "77", "source_name": "simon frith", "target_name": "rock music", "weight": 5.0, "year": 2015}, {"source": "42", "target": "78", "source_name": "simon frith", "target_name": "hip hop", "weight": 1.0, "year": 2015}, {"source": "42", "target": "79", "source_name": "simon frith", "target_name": "popular culture", "weight": 2.0, "year": 2015}, {"source": "42", "target": "82", "source_name": "simon frith", "target_name": "heavy metal", "weight": 1.0, "year": 2015}, {"source": "42", "target": "88", "source_name": "simon frith", "target_name": "oxford university press", "weight": 1.0, "year": 2015}, {"source": "43", "target": "48", "source_name": "music education", "target_name": "pop music", "weight": 2.0, "year": 2015}, {"source": "43", "target": "49", "source_name": "music education", "target_name": "music theory", "weight": 3.0, "year": 2015}, {"source": "43", "target": "52", "source_name": "music education", "target_name": "folk song", "weight": 1.0, "year": 2015}, {"source": "43", "target": "53", "source_name": "music education", "target_name": "popular music", "weight": 6.0, "year": 2015}, {"source": "43", "target": "57", "source_name": "music education", "target_name": "north america", "weight": 1.0, "year": 2015}, {"source": "43", "target": "60", "source_name": "music education", "target_name": "cultural studies", "weight": 1.0, "year": 2015}, {"source": "43", "target": "66", "source_name": "music education", "target_name": "hong kong", "weight": 1.0, "year": 2015}, {"source": "43", "target": "69", "source_name": "music education", "target_name": "classical music", "weight": 3.0, "year": 2015}, {"source": "43", "target": "74", "source_name": "music education", "target_name": "united states", "weight": 1.0, "year": 2015}, {"source": "43", "target": "77", "source_name": "music education", "target_name": "rock music", "weight": 5.0, "year": 2015}, {"source": "43", "target": "80", "source_name": "music education", "target_name": "folk music", "weight": 6.0, "year": 2015}, {"source": "43", "target": "82", "source_name": "music education", "target_name": "heavy metal", "weight": 1.0, "year": 2015}, {"source": "44", "target": "47", "source_name": "alternative rock", "target_name": "hard rock", "weight": 2.0, "year": 2015}, {"source": "44", "target": "48", "source_name": "alternative rock", "target_name": "pop music", "weight": 1.0, "year": 2015}, {"source": "44", "target": "51", "source_name": "alternative rock", "target_name": "cultural identity", "weight": 1.0, "year": 2015}, {"source": "44", "target": "53", "source_name": "alternative rock", "target_name": "popular music", "weight": 9.0, "year": 2015}, {"source": "44", "target": "57", "source_name": "alternative rock", "target_name": "north america", "weight": 3.0, "year": 2015}, {"source": "44", "target": "61", "source_name": "alternative rock", "target_name": "progressive rock", "weight": 1.0, "year": 2015}, {"source": "44", "target": "65", "source_name": "alternative rock", "target_name": "country music", "weight": 2.0, "year": 2015}, {"source": "44", "target": "67", "source_name": "alternative rock", "target_name": "rock art", "weight": 1.0, "year": 2015}, {"source": "44", "target": "73", "source_name": "alternative rock", "target_name": "southern rock", "weight": 1.0, "year": 2015}, {"source": "44", "target": "74", "source_name": "alternative rock", "target_name": "united states", "weight": 2.0, "year": 2015}, {"source": "44", "target": "77", "source_name": "alternative rock", "target_name": "rock music", "weight": 8.0, "year": 2015}, {"source": "44", "target": "78", "source_name": "alternative rock", "target_name": "hip hop", "weight": 1.0, "year": 2015}, {"source": "44", "target": "79", "source_name": "alternative rock", "target_name": "popular culture", "weight": 1.0, "year": 2015}, {"source": "44", "target": "80", "source_name": "alternative rock", "target_name": "folk music", "weight": 1.0, "year": 2015}, {"source": "44", "target": "82", "source_name": "alternative rock", "target_name": "heavy metal", "weight": 1.0, "year": 2015}, {"source": "45", "target": "77", "source_name": "double bass", "target_name": "rock music", "weight": 2.0, "year": 2015}, {"source": "46", "target": "48", "source_name": "music festival", "target_name": "pop music", "weight": 2.0, "year": 2015}, {"source": "46", "target": "53", "source_name": "music festival", "target_name": "popular music", "weight": 2.0, "year": 2015}, {"source": "46", "target": "61", "source_name": "music festival", "target_name": "progressive rock", "weight": 1.0, "year": 2015}, {"source": "46", "target": "66", "source_name": "music festival", "target_name": "hong kong", "weight": 1.0, "year": 2015}, {"source": "46", "target": "69", "source_name": "music festival", "target_name": "classical music", "weight": 3.0, "year": 2015}, {"source": "46", "target": "77", "source_name": "music festival", "target_name": "rock music", "weight": 3.0, "year": 2015}, {"source": "46", "target": "78", "source_name": "music festival", "target_name": "hip hop", "weight": 1.0, "year": 2015}, {"source": "46", "target": "80", "source_name": "music festival", "target_name": "folk music", "weight": 2.0, "year": 2015}, {"source": "46", "target": "85", "source_name": "music festival", "target_name": "jewish music", "weight": 1.0, "year": 2015}, {"source": "47", "target": "48", "source_name": "hard rock", "target_name": "pop music", "weight": 2.0, "year": 2015}, {"source": "47", "target": "51", "source_name": "hard rock", "target_name": "cultural identity", "weight": 1.0, "year": 2015}, {"source": "47", "target": "53", "source_name": "hard rock", "target_name": "popular music", "weight": 5.0, "year": 2015}, {"source": "47", "target": "56", "source_name": "hard rock", "target_name": "bruce springsteen", "weight": 1.0, "year": 2015}, {"source": "47", "target": "57", "source_name": "hard rock", "target_name": "north america", "weight": 1.0, "year": 2015}, {"source": "47", "target": "59", "source_name": "hard rock", "target_name": "college students", "weight": 1.0, "year": 2015}, {"source": "47", "target": "61", "source_name": "hard rock", "target_name": "progressive rock", "weight": 2.0, "year": 2015}, {"source": "47", "target": "65", "source_name": "hard rock", "target_name": "country music", "weight": 1.0, "year": 2015}, {"source": "47", "target": "69", "source_name": "hard rock", "target_name": "classical music", "weight": 2.0, "year": 2015}, {"source": "47", "target": "74", "source_name": "hard rock", "target_name": "united states", "weight": 1.0, "year": 2015}, {"source": "47", "target": "77", "source_name": "hard rock", "target_name": "rock music", "weight": 12.0, "year": 2015}, {"source": "47", "target": "78", "source_name": "hard rock", "target_name": "hip hop", "weight": 1.0, "year": 2015}, {"source": "47", "target": "79", "source_name": "hard rock", "target_name": "popular culture", "weight": 2.0, "year": 2015}, {"source": "47", "target": "82", "source_name": "hard rock", "target_name": "heavy metal", "weight": 8.0, "year": 2015}, {"source": "47", "target": "83", "source_name": "hard rock", "target_name": "folk rock", "weight": 1.0, "year": 2015}, {"source": "47", "target": "89", "source_name": "hard rock", "target_name": "electronic music", "weight": 1.0, "year": 2015}, {"source": "48", "target": "49", "source_name": "pop music", "target_name": "music theory", "weight": 1.0, "year": 2015}, {"source": "48", "target": "51", "source_name": "pop music", "target_name": "cultural identity", "weight": 3.0, "year": 2015}, {"source": "48", "target": "52", "source_name": "pop music", "target_name": "folk song", "weight": 2.0, "year": 2015}, {"source": "48", "target": "53", "source_name": "pop music", "target_name": "popular music", "weight": 41.0, "year": 2015}, {"source": "48", "target": "55", "source_name": "pop music", "target_name": "rock criticism", "weight": 2.0, "year": 2015}, {"source": "48", "target": "57", "source_name": "pop music", "target_name": "north america", "weight": 2.0, "year": 2015}, {"source": "48", "target": "59", "source_name": "pop music", "target_name": "college students", "weight": 3.0, "year": 2015}, {"source": "48", "target": "60", "source_name": "pop music", "target_name": "cultural studies", "weight": 1.0, "year": 2015}, {"source": "48", "target": "62", "source_name": "pop music", "target_name": "led zeppelin", "weight": 2.0, "year": 2015}, {"source": "48", "target": "64", "source_name": "pop music", "target_name": "english language", "weight": 2.0, "year": 2015}, {"source": "48", "target": "65", "source_name": "pop music", "target_name": "country music", "weight": 2.0, "year": 2015}, {"source": "48", "target": "66", "source_name": "pop music", "target_name": "hong kong", "weight": 4.0, "year": 2015}, {"source": "48", "target": "67", "source_name": "pop music", "target_name": "rock art", "weight": 3.0, "year": 2015}, {"source": "48", "target": "69", "source_name": "pop music", "target_name": "classical music", "weight": 8.0, "year": 2015}, {"source": "48", "target": "70", "source_name": "pop music", "target_name": "world war", "weight": 2.0, "year": 2015}, {"source": "48", "target": "71", "source_name": "pop music", "target_name": "latin american", "weight": 1.0, "year": 2015}, {"source": "48", "target": "72", "source_name": "pop music", "target_name": "jimi hendrix", "weight": 3.0, "year": 2015}, {"source": "48", "target": "74", "source_name": "pop music", "target_name": "united states", "weight": 4.0, "year": 2015}, {"source": "48", "target": "76", "source_name": "pop music", "target_name": "los angeles", "weight": 1.0, "year": 2015}, {"source": "48", "target": "77", "source_name": "pop music", "target_name": "rock music", "weight": 35.0, "year": 2015}, {"source": "48", "target": "78", "source_name": "pop music", "target_name": "hip hop", "weight": 4.0, "year": 2015}, {"source": "48", "target": "79", "source_name": "pop music", "target_name": "popular culture", "weight": 6.0, "year": 2015}, {"source": "48", "target": "80", "source_name": "pop music", "target_name": "folk music", "weight": 7.0, "year": 2015}, {"source": "48", "target": "82", "source_name": "pop music", "target_name": "heavy metal", "weight": 2.0, "year": 2015}, {"source": "48", "target": "83", "source_name": "pop music", "target_name": "folk rock", "weight": 2.0, "year": 2015}, {"source": "48", "target": "87", "source_name": "pop music", "target_name": "music hall", "weight": 1.0, "year": 2015}, {"source": "49", "target": "53", "source_name": "music theory", "target_name": "popular music", "weight": 5.0, "year": 2015}, {"source": "49", "target": "54", "source_name": "music theory", "target_name": "american popular music", "weight": 1.0, "year": 2015}, {"source": "49", "target": "55", "source_name": "music theory", "target_name": "rock criticism", "weight": 1.0, "year": 2015}, {"source": "49", "target": "57", "source_name": "music theory", "target_name": "north america", "weight": 2.0, "year": 2015}, {"source": "49", "target": "61", "source_name": "music theory", "target_name": "progressive rock", "weight": 1.0, "year": 2015}, {"source": "49", "target": "69", "source_name": "music theory", "target_name": "classical music", "weight": 1.0, "year": 2015}, {"source": "49", "target": "72", "source_name": "music theory", "target_name": "jimi hendrix", "weight": 1.0, "year": 2015}, {"source": "49", "target": "77", "source_name": "music theory", "target_name": "rock music", "weight": 4.0, "year": 2015}, {"source": "49", "target": "78", "source_name": "music theory", "target_name": "hip hop", "weight": 1.0, "year": 2015}, {"source": "49", "target": "88", "source_name": "music theory", "target_name": "oxford university press", "weight": 2.0, "year": 2015}, {"source": "49", "target": "89", "source_name": "music theory", "target_name": "electronic music", "weight": 1.0, "year": 2015}, {"source": "50", "target": "53", "source_name": "hollywood film", "target_name": "popular music", "weight": 1.0, "year": 2015}, {"source": "50", "target": "60", "source_name": "hollywood film", "target_name": "cultural studies", "weight": 1.0, "year": 2015}, {"source": "50", "target": "79", "source_name": "hollywood film", "target_name": "popular culture", "weight": 1.0, "year": 2015}, {"source": "50", "target": "81", "source_name": "hollywood film", "target_name": "avant garde", "weight": 1.0, "year": 2015}, {"source": "50", "target": "88", "source_name": "hollywood film", "target_name": "oxford university press", "weight": 1.0, "year": 2015}, {"source": "51", "target": "52", "source_name": "cultural identity", "target_name": "folk song", "weight": 1.0, "year": 2015}, {"source": "51", "target": "53", "source_name": "cultural identity", "target_name": "popular music", "weight": 2.0, "year": 2015}, {"source": "51", "target": "60", "source_name": "cultural identity", "target_name": "cultural studies", "weight": 2.0, "year": 2015}, {"source": "51", "target": "65", "source_name": "cultural identity", "target_name": "country music", "weight": 1.0, "year": 2015}, {"source": "51", "target": "66", "source_name": "cultural identity", "target_name": "hong kong", "weight": 1.0, "year": 2015}, {"source": "51", "target": "72", "source_name": "cultural identity", "target_name": "jimi hendrix", "weight": 2.0, "year": 2015}, {"source": "51", "target": "74", "source_name": "cultural identity", "target_name": "united states", "weight": 2.0, "year": 2015}, {"source": "51", "target": "77", "source_name": "cultural identity", "target_name": "rock music", "weight": 6.0, "year": 2015}, {"source": "51", "target": "79", "source_name": "cultural identity", "target_name": "popular culture", "weight": 2.0, "year": 2015}, {"source": "51", "target": "80", "source_name": "cultural identity", "target_name": "folk music", "weight": 1.0, "year": 2015}, {"source": "51", "target": "82", "source_name": "cultural identity", "target_name": "heavy metal", "weight": 1.0, "year": 2015}, {"source": "52", "target": "53", "source_name": "folk song", "target_name": "popular music", "weight": 10.0, "year": 2015}, {"source": "52", "target": "54", "source_name": "folk song", "target_name": "american popular music", "weight": 2.0, "year": 2015}, {"source": "52", "target": "65", "source_name": "folk song", "target_name": "country music", "weight": 1.0, "year": 2015}, {"source": "52", "target": "66", "source_name": "folk song", "target_name": "hong kong", "weight": 1.0, "year": 2015}, {"source": "52", "target": "69", "source_name": "folk song", "target_name": "classical music", "weight": 2.0, "year": 2015}, {"source": "52", "target": "74", "source_name": "folk song", "target_name": "united states", "weight": 1.0, "year": 2015}, {"source": "52", "target": "77", "source_name": "folk song", "target_name": "rock music", "weight": 4.0, "year": 2015}, {"source": "52", "target": "80", "source_name": "folk song", "target_name": "folk music", "weight": 8.0, "year": 2015}, {"source": "52", "target": "87", "source_name": "folk song", "target_name": "music hall", "weight": 1.0, "year": 2015}, {"source": "52", "target": "89", "source_name": "folk song", "target_name": "electronic music", "weight": 1.0, "year": 2015}, {"source": "53", "target": "54", "source_name": "popular music", "target_name": "american popular music", "weight": 18.0, "year": 2015}, {"source": "53", "target": "55", "source_name": "popular music", "target_name": "rock criticism", "weight": 5.0, "year": 2015}, {"source": "53", "target": "56", "source_name": "popular music", "target_name": "bruce springsteen", "weight": 2.0, "year": 2015}, {"source": "53", "target": "57", "source_name": "popular music", "target_name": "north america", "weight": 9.0, "year": 2015}, {"source": "53", "target": "58", "source_name": "popular music", "target_name": "music therapy", "weight": 1.0, "year": 2015}, {"source": "53", "target": "59", "source_name": "popular music", "target_name": "college students", "weight": 3.0, "year": 2015}, {"source": "53", "target": "60", "source_name": "popular music", "target_name": "cultural studies", "weight": 8.0, "year": 2015}, {"source": "53", "target": "61", "source_name": "popular music", "target_name": "progressive rock", "weight": 10.0, "year": 2015}, {"source": "53", "target": "62", "source_name": "popular music", "target_name": "led zeppelin", "weight": 2.0, "year": 2015}, {"source": "53", "target": "64", "source_name": "popular music", "target_name": "english language", "weight": 2.0, "year": 2015}, {"source": "53", "target": "65", "source_name": "popular music", "target_name": "country music", "weight": 11.0, "year": 2015}, {"source": "53", "target": "66", "source_name": "popular music", "target_name": "hong kong", "weight": 4.0, "year": 2015}, {"source": "53", "target": "67", "source_name": "popular music", "target_name": "rock art", "weight": 8.0, "year": 2015}, {"source": "53", "target": "69", "source_name": "popular music", "target_name": "classical music", "weight": 16.0, "year": 2015}, {"source": "53", "target": "70", "source_name": "popular music", "target_name": "world war", "weight": 6.0, "year": 2015}, {"source": "53", "target": "71", "source_name": "popular music", "target_name": "latin american", "weight": 3.0, "year": 2015}, {"source": "53", "target": "72", "source_name": "popular music", "target_name": "jimi hendrix", "weight": 5.0, "year": 2015}, {"source": "53", "target": "73", "source_name": "popular music", "target_name": "southern rock", "weight": 2.0, "year": 2015}, {"source": "53", "target": "74", "source_name": "popular music", "target_name": "united states", "weight": 22.0, "year": 2015}, {"source": "53", "target": "75", "source_name": "popular music", "target_name": "world war ii", "weight": 4.0, "year": 2015}, {"source": "53", "target": "76", "source_name": "popular music", "target_name": "los angeles", "weight": 6.0, "year": 2015}, {"source": "53", "target": "77", "source_name": "popular music", "target_name": "rock music", "weight": 138.0, "year": 2015}, {"source": "53", "target": "78", "source_name": "popular music", "target_name": "hip hop", "weight": 11.0, "year": 2015}, {"source": "53", "target": "79", "source_name": "popular music", "target_name": "popular culture", "weight": 27.0, "year": 2015}, {"source": "53", "target": "80", "source_name": "popular music", "target_name": "folk music", "weight": 20.0, "year": 2015}, {"source": "53", "target": "82", "source_name": "popular music", "target_name": "heavy metal", "weight": 14.0, "year": 2015}, {"source": "53", "target": "83", "source_name": "popular music", "target_name": "folk rock", "weight": 3.0, "year": 2015}, {"source": "53", "target": "85", "source_name": "popular music", "target_name": "jewish music", "weight": 2.0, "year": 2015}, {"source": "53", "target": "87", "source_name": "popular music", "target_name": "music hall", "weight": 5.0, "year": 2015}, {"source": "53", "target": "88", "source_name": "popular music", "target_name": "oxford university press", "weight": 4.0, "year": 2015}, {"source": "53", "target": "89", "source_name": "popular music", "target_name": "electronic music", "weight": 9.0, "year": 2015}, {"source": "53", "target": "90", "source_name": "popular music", "target_name": "blues rock", "weight": 1.0, "year": 2015}, {"source": "54", "target": "55", "source_name": "american popular music", "target_name": "rock criticism", "weight": 1.0, "year": 2015}, {"source": "54", "target": "57", "source_name": "american popular music", "target_name": "north america", "weight": 2.0, "year": 2015}, {"source": "54", "target": "65", "source_name": "american popular music", "target_name": "country music", "weight": 5.0, "year": 2015}, {"source": "54", "target": "69", "source_name": "american popular music", "target_name": "classical music", "weight": 3.0, "year": 2015}, {"source": "54", "target": "70", "source_name": "american popular music", "target_name": "world war", "weight": 1.0, "year": 2015}, {"source": "54", "target": "71", "source_name": "american popular music", "target_name": "latin american", "weight": 1.0, "year": 2015}, {"source": "54", "target": "74", "source_name": "american popular music", "target_name": "united states", "weight": 5.0, "year": 2015}, {"source": "54", "target": "75", "source_name": "american popular music", "target_name": "world war ii", "weight": 1.0, "year": 2015}, {"source": "54", "target": "76", "source_name": "american popular music", "target_name": "los angeles", "weight": 1.0, "year": 2015}, {"source": "54", "target": "77", "source_name": "american popular music", "target_name": "rock music", "weight": 7.0, "year": 2015}, {"source": "54", "target": "78", "source_name": "american popular music", "target_name": "hip hop", "weight": 2.0, "year": 2015}, {"source": "54", "target": "79", "source_name": "american popular music", "target_name": "popular culture", "weight": 1.0, "year": 2015}, {"source": "54", "target": "80", "source_name": "american popular music", "target_name": "folk music", "weight": 1.0, "year": 2015}, {"source": "54", "target": "88", "source_name": "american popular music", "target_name": "oxford university press", "weight": 1.0, "year": 2015}, {"source": "54", "target": "89", "source_name": "american popular music", "target_name": "electronic music", "weight": 1.0, "year": 2015}, {"source": "55", "target": "56", "source_name": "rock criticism", "target_name": "bruce springsteen", "weight": 1.0, "year": 2015}, {"source": "55", "target": "57", "source_name": "rock criticism", "target_name": "north america", "weight": 1.0, "year": 2015}, {"source": "55", "target": "61", "source_name": "rock criticism", "target_name": "progressive rock", "weight": 2.0, "year": 2015}, {"source": "55", "target": "65", "source_name": "rock criticism", "target_name": "country music", "weight": 1.0, "year": 2015}, {"source": "55", "target": "69", "source_name": "rock criticism", "target_name": "classical music", "weight": 1.0, "year": 2015}, {"source": "55", "target": "74", "source_name": "rock criticism", "target_name": "united states", "weight": 2.0, "year": 2015}, {"source": "55", "target": "77", "source_name": "rock criticism", "target_name": "rock music", "weight": 5.0, "year": 2015}, {"source": "55", "target": "78", "source_name": "rock criticism", "target_name": "hip hop", "weight": 1.0, "year": 2015}, {"source": "55", "target": "79", "source_name": "rock criticism", "target_name": "popular culture", "weight": 1.0, "year": 2015}, {"source": "55", "target": "88", "source_name": "rock criticism", "target_name": "oxford university press", "weight": 1.0, "year": 2015}, {"source": "56", "target": "72", "source_name": "bruce springsteen", "target_name": "jimi hendrix", "weight": 1.0, "year": 2015}, {"source": "56", "target": "77", "source_name": "bruce springsteen", "target_name": "rock music", "weight": 2.0, "year": 2015}, {"source": "56", "target": "78", "source_name": "bruce springsteen", "target_name": "hip hop", "weight": 1.0, "year": 2015}, {"source": "56", "target": "79", "source_name": "bruce springsteen", "target_name": "popular culture", "weight": 2.0, "year": 2015}, {"source": "56", "target": "82", "source_name": "bruce springsteen", "target_name": "heavy metal", "weight": 1.0, "year": 2015}, {"source": "57", "target": "61", "source_name": "north america", "target_name": "progressive rock", "weight": 1.0, "year": 2015}, {"source": "57", "target": "65", "source_name": "north america", "target_name": "country music", "weight": 2.0, "year": 2015}, {"source": "57", "target": "71", "source_name": "north america", "target_name": "latin american", "weight": 1.0, "year": 2015}, {"source": "57", "target": "73", "source_name": "north america", "target_name": "southern rock", "weight": 1.0, "year": 2015}, {"source": "57", "target": "74", "source_name": "north america", "target_name": "united states", "weight": 3.0, "year": 2015}, {"source": "57", "target": "77", "source_name": "north america", "target_name": "rock music", "weight": 7.0, "year": 2015}, {"source": "57", "target": "78", "source_name": "north america", "target_name": "hip hop", "weight": 1.0, "year": 2015}, {"source": "57", "target": "80", "source_name": "north america", "target_name": "folk music", "weight": 2.0, "year": 2015}, {"source": "57", "target": "82", "source_name": "north america", "target_name": "heavy metal", "weight": 1.0, "year": 2015}, {"source": "58", "target": "64", "source_name": "music therapy", "target_name": "english language", "weight": 1.0, "year": 2015}, {"source": "58", "target": "74", "source_name": "music therapy", "target_name": "united states", "weight": 1.0, "year": 2015}, {"source": "58", "target": "77", "source_name": "music therapy", "target_name": "rock music", "weight": 3.0, "year": 2015}, {"source": "59", "target": "69", "source_name": "college students", "target_name": "classical music", "weight": 1.0, "year": 2015}, {"source": "59", "target": "74", "source_name": "college students", "target_name": "united states", "weight": 1.0, "year": 2015}, {"source": "59", "target": "77", "source_name": "college students", "target_name": "rock music", "weight": 5.0, "year": 2015}, {"source": "59", "target": "82", "source_name": "college students", "target_name": "heavy metal", "weight": 2.0, "year": 2015}, {"source": "60", "target": "61", "source_name": "cultural studies", "target_name": "progressive rock", "weight": 1.0, "year": 2015}, {"source": "60", "target": "62", "source_name": "cultural studies", "target_name": "led zeppelin", "weight": 1.0, "year": 2015}, {"source": "60", "target": "71", "source_name": "cultural studies", "target_name": "latin american", "weight": 1.0, "year": 2015}, {"source": "60", "target": "74", "source_name": "cultural studies", "target_name": "united states", "weight": 1.0, "year": 2015}, {"source": "60", "target": "76", "source_name": "cultural studies", "target_name": "los angeles", "weight": 1.0, "year": 2015}, {"source": "60", "target": "77", "source_name": "cultural studies", "target_name": "rock music", "weight": 8.0, "year": 2015}, {"source": "60", "target": "79", "source_name": "cultural studies", "target_name": "popular culture", "weight": 5.0, "year": 2015}, {"source": "60", "target": "80", "source_name": "cultural studies", "target_name": "folk music", "weight": 2.0, "year": 2015}, {"source": "60", "target": "81", "source_name": "cultural studies", "target_name": "avant garde", "weight": 1.0, "year": 2015}, {"source": "60", "target": "85", "source_name": "cultural studies", "target_name": "jewish music", "weight": 1.0, "year": 2015}, {"source": "60", "target": "87", "source_name": "cultural studies", "target_name": "music hall", "weight": 1.0, "year": 2015}, {"source": "60", "target": "88", "source_name": "cultural studies", "target_name": "oxford university press", "weight": 4.0, "year": 2015}, {"source": "60", "target": "89", "source_name": "cultural studies", "target_name": "electronic music", "weight": 1.0, "year": 2015}, {"source": "61", "target": "69", "source_name": "progressive rock", "target_name": "classical music", "weight": 2.0, "year": 2015}, {"source": "61", "target": "72", "source_name": "progressive rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2015}, {"source": "61", "target": "74", "source_name": "progressive rock", "target_name": "united states", "weight": 3.0, "year": 2015}, {"source": "61", "target": "77", "source_name": "progressive rock", "target_name": "rock music", "weight": 24.0, "year": 2015}, {"source": "61", "target": "80", "source_name": "progressive rock", "target_name": "folk music", "weight": 3.0, "year": 2015}, {"source": "61", "target": "82", "source_name": "progressive rock", "target_name": "heavy metal", "weight": 2.0, "year": 2015}, {"source": "61", "target": "83", "source_name": "progressive rock", "target_name": "folk rock", "weight": 1.0, "year": 2015}, {"source": "61", "target": "88", "source_name": "progressive rock", "target_name": "oxford university press", "weight": 1.0, "year": 2015}, {"source": "61", "target": "89", "source_name": "progressive rock", "target_name": "electronic music", "weight": 1.0, "year": 2015}, {"source": "62", "target": "67", "source_name": "led zeppelin", "target_name": "rock art", "weight": 1.0, "year": 2015}, {"source": "62", "target": "69", "source_name": "led zeppelin", "target_name": "classical music", "weight": 1.0, "year": 2015}, {"source": "62", "target": "77", "source_name": "led zeppelin", "target_name": "rock music", "weight": 2.0, "year": 2015}, {"source": "62", "target": "78", "source_name": "led zeppelin", "target_name": "hip hop", "weight": 1.0, "year": 2015}, {"source": "62", "target": "80", "source_name": "led zeppelin", "target_name": "folk music", "weight": 1.0, "year": 2015}, {"source": "62", "target": "82", "source_name": "led zeppelin", "target_name": "heavy metal", "weight": 1.0, "year": 2015}, {"source": "62", "target": "88", "source_name": "led zeppelin", "target_name": "oxford university press", "weight": 1.0, "year": 2015}, {"source": "64", "target": "66", "source_name": "english language", "target_name": "hong kong", "weight": 1.0, "year": 2015}, {"source": "64", "target": "67", "source_name": "english language", "target_name": "rock art", "weight": 1.0, "year": 2015}, {"source": "64", "target": "70", "source_name": "english language", "target_name": "world war", "weight": 1.0, "year": 2015}, {"source": "64", "target": "74", "source_name": "english language", "target_name": "united states", "weight": 2.0, "year": 2015}, {"source": "64", "target": "77", "source_name": "english language", "target_name": "rock music", "weight": 2.0, "year": 2015}, {"source": "64", "target": "79", "source_name": "english language", "target_name": "popular culture", "weight": 1.0, "year": 2015}, {"source": "64", "target": "83", "source_name": "english language", "target_name": "folk rock", "weight": 1.0, "year": 2015}, {"source": "65", "target": "69", "source_name": "country music", "target_name": "classical music", "weight": 4.0, "year": 2015}, {"source": "65", "target": "72", "source_name": "country music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2015}, {"source": "65", "target": "73", "source_name": "country music", "target_name": "southern rock", "weight": 2.0, "year": 2015}, {"source": "65", "target": "74", "source_name": "country music", "target_name": "united states", "weight": 3.0, "year": 2015}, {"source": "65", "target": "77", "source_name": "country music", "target_name": "rock music", "weight": 5.0, "year": 2015}, {"source": "65", "target": "78", "source_name": "country music", "target_name": "hip hop", "weight": 1.0, "year": 2015}, {"source": "65", "target": "79", "source_name": "country music", "target_name": "popular culture", "weight": 2.0, "year": 2015}, {"source": "65", "target": "80", "source_name": "country music", "target_name": "folk music", "weight": 3.0, "year": 2015}, {"source": "65", "target": "82", "source_name": "country music", "target_name": "heavy metal", "weight": 1.0, "year": 2015}, {"source": "65", "target": "89", "source_name": "country music", "target_name": "electronic music", "weight": 2.0, "year": 2015}, {"source": "66", "target": "67", "source_name": "hong kong", "target_name": "rock art", "weight": 1.0, "year": 2015}, {"source": "66", "target": "77", "source_name": "hong kong", "target_name": "rock music", "weight": 2.0, "year": 2015}, {"source": "66", "target": "78", "source_name": "hong kong", "target_name": "hip hop", "weight": 1.0, "year": 2015}, {"source": "66", "target": "80", "source_name": "hong kong", "target_name": "folk music", "weight": 1.0, "year": 2015}, {"source": "66", "target": "83", "source_name": "hong kong", "target_name": "folk rock", "weight": 1.0, "year": 2015}, {"source": "66", "target": "85", "source_name": "hong kong", "target_name": "jewish music", "weight": 1.0, "year": 2015}, {"source": "67", "target": "69", "source_name": "rock art", "target_name": "classical music", "weight": 1.0, "year": 2015}, {"source": "67", "target": "74", "source_name": "rock art", "target_name": "united states", "weight": 1.0, "year": 2015}, {"source": "67", "target": "77", "source_name": "rock art", "target_name": "rock music", "weight": 8.0, "year": 2015}, {"source": "67", "target": "79", "source_name": "rock art", "target_name": "popular culture", "weight": 1.0, "year": 2015}, {"source": "67", "target": "80", "source_name": "rock art", "target_name": "folk music", "weight": 1.0, "year": 2015}, {"source": "67", "target": "82", "source_name": "rock art", "target_name": "heavy metal", "weight": 1.0, "year": 2015}, {"source": "67", "target": "83", "source_name": "rock art", "target_name": "folk rock", "weight": 1.0, "year": 2015}, {"source": "67", "target": "89", "source_name": "rock art", "target_name": "electronic music", "weight": 1.0, "year": 2015}, {"source": "68", "target": "69", "source_name": "hearing loss", "target_name": "classical music", "weight": 1.0, "year": 2015}, {"source": "68", "target": "77", "source_name": "hearing loss", "target_name": "rock music", "weight": 3.0, "year": 2015}, {"source": "69", "target": "70", "source_name": "classical music", "target_name": "world war", "weight": 2.0, "year": 2015}, {"source": "69", "target": "71", "source_name": "classical music", "target_name": "latin american", "weight": 1.0, "year": 2015}, {"source": "69", "target": "72", "source_name": "classical music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2015}, {"source": "69", "target": "74", "source_name": "classical music", "target_name": "united states", "weight": 4.0, "year": 2015}, {"source": "69", "target": "75", "source_name": "classical music", "target_name": "world war ii", "weight": 1.0, "year": 2015}, {"source": "69", "target": "76", "source_name": "classical music", "target_name": "los angeles", "weight": 1.0, "year": 2015}, {"source": "69", "target": "77", "source_name": "classical music", "target_name": "rock music", "weight": 35.0, "year": 2015}, {"source": "69", "target": "78", "source_name": "classical music", "target_name": "hip hop", "weight": 2.0, "year": 2015}, {"source": "69", "target": "79", "source_name": "classical music", "target_name": "popular culture", "weight": 4.0, "year": 2015}, {"source": "69", "target": "80", "source_name": "classical music", "target_name": "folk music", "weight": 5.0, "year": 2015}, {"source": "69", "target": "82", "source_name": "classical music", "target_name": "heavy metal", "weight": 3.0, "year": 2015}, {"source": "69", "target": "87", "source_name": "classical music", "target_name": "music hall", "weight": 2.0, "year": 2015}, {"source": "69", "target": "88", "source_name": "classical music", "target_name": "oxford university press", "weight": 1.0, "year": 2015}, {"source": "69", "target": "89", "source_name": "classical music", "target_name": "electronic music", "weight": 2.0, "year": 2015}, {"source": "70", "target": "74", "source_name": "world war", "target_name": "united states", "weight": 2.0, "year": 2015}, {"source": "70", "target": "75", "source_name": "world war", "target_name": "world war ii", "weight": 6.0, "year": 2015}, {"source": "70", "target": "77", "source_name": "world war", "target_name": "rock music", "weight": 6.0, "year": 2015}, {"source": "70", "target": "79", "source_name": "world war", "target_name": "popular culture", "weight": 1.0, "year": 2015}, {"source": "70", "target": "80", "source_name": "world war", "target_name": "folk music", "weight": 1.0, "year": 2015}, {"source": "70", "target": "87", "source_name": "world war", "target_name": "music hall", "weight": 1.0, "year": 2015}, {"source": "70", "target": "89", "source_name": "world war", "target_name": "electronic music", "weight": 1.0, "year": 2015}, {"source": "71", "target": "74", "source_name": "latin american", "target_name": "united states", "weight": 4.0, "year": 2015}, {"source": "71", "target": "76", "source_name": "latin american", "target_name": "los angeles", "weight": 2.0, "year": 2015}, {"source": "71", "target": "77", "source_name": "latin american", "target_name": "rock music", "weight": 5.0, "year": 2015}, {"source": "71", "target": "79", "source_name": "latin american", "target_name": "popular culture", "weight": 1.0, "year": 2015}, {"source": "72", "target": "74", "source_name": "jimi hendrix", "target_name": "united states", "weight": 1.0, "year": 2015}, {"source": "72", "target": "77", "source_name": "jimi hendrix", "target_name": "rock music", "weight": 7.0, "year": 2015}, {"source": "72", "target": "79", "source_name": "jimi hendrix", "target_name": "popular culture", "weight": 2.0, "year": 2015}, {"source": "72", "target": "80", "source_name": "jimi hendrix", "target_name": "folk music", "weight": 1.0, "year": 2015}, {"source": "72", "target": "89", "source_name": "jimi hendrix", "target_name": "electronic music", "weight": 1.0, "year": 2015}, {"source": "73", "target": "77", "source_name": "southern rock", "target_name": "rock music", "weight": 1.0, "year": 2015}, {"source": "73", "target": "80", "source_name": "southern rock", "target_name": "folk music", "weight": 1.0, "year": 2015}, {"source": "74", "target": "76", "source_name": "united states", "target_name": "los angeles", "weight": 1.0, "year": 2015}, {"source": "74", "target": "77", "source_name": "united states", "target_name": "rock music", "weight": 16.0, "year": 2015}, {"source": "74", "target": "78", "source_name": "united states", "target_name": "hip hop", "weight": 1.0, "year": 2015}, {"source": "74", "target": "79", "source_name": "united states", "target_name": "popular culture", "weight": 3.0, "year": 2015}, {"source": "74", "target": "80", "source_name": "united states", "target_name": "folk music", "weight": 4.0, "year": 2015}, {"source": "74", "target": "88", "source_name": "united states", "target_name": "oxford university press", "weight": 1.0, "year": 2015}, {"source": "74", "target": "89", "source_name": "united states", "target_name": "electronic music", "weight": 3.0, "year": 2015}, {"source": "75", "target": "76", "source_name": "world war ii", "target_name": "los angeles", "weight": 1.0, "year": 2015}, {"source": "75", "target": "77", "source_name": "world war ii", "target_name": "rock music", "weight": 3.0, "year": 2015}, {"source": "75", "target": "80", "source_name": "world war ii", "target_name": "folk music", "weight": 1.0, "year": 2015}, {"source": "76", "target": "77", "source_name": "los angeles", "target_name": "rock music", "weight": 7.0, "year": 2015}, {"source": "76", "target": "79", "source_name": "los angeles", "target_name": "popular culture", "weight": 1.0, "year": 2015}, {"source": "76", "target": "80", "source_name": "los angeles", "target_name": "folk music", "weight": 1.0, "year": 2015}, {"source": "77", "target": "78", "source_name": "rock music", "target_name": "hip hop", "weight": 5.0, "year": 2015}, {"source": "77", "target": "79", "source_name": "rock music", "target_name": "popular culture", "weight": 22.0, "year": 2015}, {"source": "77", "target": "80", "source_name": "rock music", "target_name": "folk music", "weight": 14.0, "year": 2015}, {"source": "77", "target": "82", "source_name": "rock music", "target_name": "heavy metal", "weight": 17.0, "year": 2015}, {"source": "77", "target": "83", "source_name": "rock music", "target_name": "folk rock", "weight": 2.0, "year": 2015}, {"source": "77", "target": "87", "source_name": "rock music", "target_name": "music hall", "weight": 5.0, "year": 2015}, {"source": "77", "target": "88", "source_name": "rock music", "target_name": "oxford university press", "weight": 2.0, "year": 2015}, {"source": "77", "target": "89", "source_name": "rock music", "target_name": "electronic music", "weight": 6.0, "year": 2015}, {"source": "78", "target": "79", "source_name": "hip hop", "target_name": "popular culture", "weight": 2.0, "year": 2015}, {"source": "78", "target": "80", "source_name": "hip hop", "target_name": "folk music", "weight": 3.0, "year": 2015}, {"source": "78", "target": "82", "source_name": "hip hop", "target_name": "heavy metal", "weight": 2.0, "year": 2015}, {"source": "78", "target": "85", "source_name": "hip hop", "target_name": "jewish music", "weight": 1.0, "year": 2015}, {"source": "78", "target": "88", "source_name": "hip hop", "target_name": "oxford university press", "weight": 1.0, "year": 2015}, {"source": "78", "target": "90", "source_name": "hip hop", "target_name": "blues rock", "weight": 1.0, "year": 2015}, {"source": "79", "target": "80", "source_name": "popular culture", "target_name": "folk music", "weight": 3.0, "year": 2015}, {"source": "79", "target": "82", "source_name": "popular culture", "target_name": "heavy metal", "weight": 3.0, "year": 2015}, {"source": "79", "target": "85", "source_name": "popular culture", "target_name": "jewish music", "weight": 1.0, "year": 2015}, {"source": "79", "target": "87", "source_name": "popular culture", "target_name": "music hall", "weight": 3.0, "year": 2015}, {"source": "79", "target": "88", "source_name": "popular culture", "target_name": "oxford university press", "weight": 1.0, "year": 2015}, {"source": "79", "target": "89", "source_name": "popular culture", "target_name": "electronic music", "weight": 1.0, "year": 2015}, {"source": "80", "target": "82", "source_name": "folk music", "target_name": "heavy metal", "weight": 1.0, "year": 2015}, {"source": "80", "target": "85", "source_name": "folk music", "target_name": "jewish music", "weight": 2.0, "year": 2015}, {"source": "80", "target": "87", "source_name": "folk music", "target_name": "music hall", "weight": 3.0, "year": 2015}, {"source": "80", "target": "88", "source_name": "folk music", "target_name": "oxford university press", "weight": 1.0, "year": 2015}, {"source": "80", "target": "89", "source_name": "folk music", "target_name": "electronic music", "weight": 3.0, "year": 2015}, {"source": "81", "target": "88", "source_name": "avant garde", "target_name": "oxford university press", "weight": 1.0, "year": 2015}, {"source": "82", "target": "83", "source_name": "heavy metal", "target_name": "folk rock", "weight": 2.0, "year": 2015}, {"source": "85", "target": "88", "source_name": "jewish music", "target_name": "oxford university press", "weight": 1.0, "year": 2015}, {"source": "88", "target": "89", "source_name": "oxford university press", "target_name": "electronic music", "weight": 1.0, "year": 2015}]}, {"2016": [{"source": "1", "target": "6", "source_name": "rock star", "target_name": "elvis presley", "weight": 1.0, "year": 2016}, {"source": "1", "target": "7", "source_name": "rock star", "target_name": "nineteenth century", "weight": 1.0, "year": 2016}, {"source": "1", "target": "9", "source_name": "rock star", "target_name": "compact disc", "weight": 1.0, "year": 2016}, {"source": "1", "target": "16", "source_name": "rock star", "target_name": "bob dylan", "weight": 1.0, "year": 2016}, {"source": "1", "target": "19", "source_name": "rock star", "target_name": "music video", "weight": 1.0, "year": 2016}, {"source": "1", "target": "23", "source_name": "rock star", "target_name": "electronic dance music", "weight": 1.0, "year": 2016}, {"source": "1", "target": "24", "source_name": "rock star", "target_name": "punk rock", "weight": 1.0, "year": 2016}, {"source": "1", "target": "28", "source_name": "rock star", "target_name": "high school", "weight": 1.0, "year": 2016}, {"source": "1", "target": "29", "source_name": "rock star", "target_name": "rolling stone", "weight": 2.0, "year": 2016}, {"source": "1", "target": "36", "source_name": "rock star", "target_name": "music industry", "weight": 4.0, "year": 2016}, {"source": "1", "target": "41", "source_name": "rock star", "target_name": "youth culture", "weight": 2.0, "year": 2016}, {"source": "1", "target": "42", "source_name": "rock star", "target_name": "simon frith", "weight": 1.0, "year": 2016}, {"source": "1", "target": "48", "source_name": "rock star", "target_name": "pop music", "weight": 4.0, "year": 2016}, {"source": "1", "target": "51", "source_name": "rock star", "target_name": "cultural identity", "weight": 2.0, "year": 2016}, {"source": "1", "target": "53", "source_name": "rock star", "target_name": "popular music", "weight": 7.0, "year": 2016}, {"source": "1", "target": "56", "source_name": "rock star", "target_name": "bruce springsteen", "weight": 1.0, "year": 2016}, {"source": "1", "target": "57", "source_name": "rock star", "target_name": "north america", "weight": 1.0, "year": 2016}, {"source": "1", "target": "60", "source_name": "rock star", "target_name": "cultural studies", "weight": 1.0, "year": 2016}, {"source": "1", "target": "69", "source_name": "rock star", "target_name": "classical music", "weight": 1.0, "year": 2016}, {"source": "1", "target": "74", "source_name": "rock star", "target_name": "united states", "weight": 1.0, "year": 2016}, {"source": "1", "target": "77", "source_name": "rock star", "target_name": "rock music", "weight": 10.0, "year": 2016}, {"source": "1", "target": "79", "source_name": "rock star", "target_name": "popular culture", "weight": 2.0, "year": 2016}, {"source": "1", "target": "82", "source_name": "rock star", "target_name": "heavy metal", "weight": 3.0, "year": 2016}, {"source": "2", "target": "3", "source_name": "indie rock", "target_name": "glam rock", "weight": 1.0, "year": 2016}, {"source": "2", "target": "19", "source_name": "indie rock", "target_name": "music video", "weight": 1.0, "year": 2016}, {"source": "2", "target": "20", "source_name": "indie rock", "target_name": "garage rock", "weight": 1.0, "year": 2016}, {"source": "2", "target": "24", "source_name": "indie rock", "target_name": "punk rock", "weight": 1.0, "year": 2016}, {"source": "2", "target": "27", "source_name": "indie rock", "target_name": "pop rock", "weight": 1.0, "year": 2016}, {"source": "2", "target": "30", "source_name": "indie rock", "target_name": "rock band", "weight": 2.0, "year": 2016}, {"source": "2", "target": "36", "source_name": "indie rock", "target_name": "music industry", "weight": 1.0, "year": 2016}, {"source": "2", "target": "44", "source_name": "indie rock", "target_name": "alternative rock", "weight": 1.0, "year": 2016}, {"source": "2", "target": "47", "source_name": "indie rock", "target_name": "hard rock", "weight": 1.0, "year": 2016}, {"source": "2", "target": "48", "source_name": "indie rock", "target_name": "pop music", "weight": 2.0, "year": 2016}, {"source": "2", "target": "51", "source_name": "indie rock", "target_name": "cultural identity", "weight": 1.0, "year": 2016}, {"source": "2", "target": "53", "source_name": "indie rock", "target_name": "popular music", "weight": 2.0, "year": 2016}, {"source": "2", "target": "67", "source_name": "indie rock", "target_name": "rock art", "weight": 2.0, "year": 2016}, {"source": "2", "target": "69", "source_name": "indie rock", "target_name": "classical music", "weight": 1.0, "year": 2016}, {"source": "2", "target": "72", "source_name": "indie rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2016}, {"source": "2", "target": "74", "source_name": "indie rock", "target_name": "united states", "weight": 1.0, "year": 2016}, {"source": "2", "target": "77", "source_name": "indie rock", "target_name": "rock music", "weight": 6.0, "year": 2016}, {"source": "2", "target": "78", "source_name": "indie rock", "target_name": "hip hop", "weight": 1.0, "year": 2016}, {"source": "2", "target": "80", "source_name": "indie rock", "target_name": "folk music", "weight": 1.0, "year": 2016}, {"source": "3", "target": "20", "source_name": "glam rock", "target_name": "garage rock", "weight": 2.0, "year": 2016}, {"source": "3", "target": "24", "source_name": "glam rock", "target_name": "punk rock", "weight": 2.0, "year": 2016}, {"source": "3", "target": "27", "source_name": "glam rock", "target_name": "pop rock", "weight": 1.0, "year": 2016}, {"source": "3", "target": "41", "source_name": "glam rock", "target_name": "youth culture", "weight": 1.0, "year": 2016}, {"source": "3", "target": "44", "source_name": "glam rock", "target_name": "alternative rock", "weight": 1.0, "year": 2016}, {"source": "3", "target": "47", "source_name": "glam rock", "target_name": "hard rock", "weight": 1.0, "year": 2016}, {"source": "3", "target": "53", "source_name": "glam rock", "target_name": "popular music", "weight": 1.0, "year": 2016}, {"source": "3", "target": "77", "source_name": "glam rock", "target_name": "rock music", "weight": 3.0, "year": 2016}, {"source": "3", "target": "79", "source_name": "glam rock", "target_name": "popular culture", "weight": 2.0, "year": 2016}, {"source": "3", "target": "87", "source_name": "glam rock", "target_name": "music hall", "weight": 1.0, "year": 2016}, {"source": "4", "target": "7", "source_name": "gregorian chant", "target_name": "nineteenth century", "weight": 1.0, "year": 2016}, {"source": "4", "target": "9", "source_name": "gregorian chant", "target_name": "compact disc", "weight": 1.0, "year": 2016}, {"source": "4", "target": "10", "source_name": "gregorian chant", "target_name": "african american", "weight": 1.0, "year": 2016}, {"source": "4", "target": "19", "source_name": "gregorian chant", "target_name": "music video", "weight": 1.0, "year": 2016}, {"source": "4", "target": "22", "source_name": "gregorian chant", "target_name": "chamber music", "weight": 1.0, "year": 2016}, {"source": "4", "target": "36", "source_name": "gregorian chant", "target_name": "music industry", "weight": 1.0, "year": 2016}, {"source": "4", "target": "37", "source_name": "gregorian chant", "target_name": "middle ages", "weight": 1.0, "year": 2016}, {"source": "4", "target": "38", "source_name": "gregorian chant", "target_name": "summary additional listening", "weight": 1.0, "year": 2016}, {"source": "4", "target": "40", "source_name": "gregorian chant", "target_name": "musical instruments", "weight": 1.0, "year": 2016}, {"source": "4", "target": "48", "source_name": "gregorian chant", "target_name": "pop music", "weight": 1.0, "year": 2016}, {"source": "4", "target": "52", "source_name": "gregorian chant", "target_name": "folk song", "weight": 1.0, "year": 2016}, {"source": "4", "target": "53", "source_name": "gregorian chant", "target_name": "popular music", "weight": 1.0, "year": 2016}, {"source": "4", "target": "54", "source_name": "gregorian chant", "target_name": "american popular music", "weight": 1.0, "year": 2016}, {"source": "4", "target": "65", "source_name": "gregorian chant", "target_name": "country music", "weight": 1.0, "year": 2016}, {"source": "4", "target": "69", "source_name": "gregorian chant", "target_name": "classical music", "weight": 1.0, "year": 2016}, {"source": "4", "target": "74", "source_name": "gregorian chant", "target_name": "united states", "weight": 1.0, "year": 2016}, {"source": "4", "target": "80", "source_name": "gregorian chant", "target_name": "folk music", "weight": 1.0, "year": 2016}, {"source": "4", "target": "89", "source_name": "gregorian chant", "target_name": "electronic music", "weight": 1.0, "year": 2016}, {"source": "5", "target": "12", "source_name": "jesus christ superstar", "target_name": "rock opera", "weight": 3.0, "year": 2016}, {"source": "5", "target": "15", "source_name": "jesus christ superstar", "target_name": "musical theatre", "weight": 3.0, "year": 2016}, {"source": "5", "target": "33", "source_name": "jesus christ superstar", "target_name": "jesus christ", "weight": 5.0, "year": 2016}, {"source": "5", "target": "34", "source_name": "jesus christ superstar", "target_name": "mass media", "weight": 1.0, "year": 2016}, {"source": "5", "target": "41", "source_name": "jesus christ superstar", "target_name": "youth culture", "weight": 1.0, "year": 2016}, {"source": "5", "target": "53", "source_name": "jesus christ superstar", "target_name": "popular music", "weight": 1.0, "year": 2016}, {"source": "5", "target": "77", "source_name": "jesus christ superstar", "target_name": "rock music", "weight": 7.0, "year": 2016}, {"source": "6", "target": "10", "source_name": "elvis presley", "target_name": "african american", "weight": 1.0, "year": 2016}, {"source": "6", "target": "16", "source_name": "elvis presley", "target_name": "bob dylan", "weight": 4.0, "year": 2016}, {"source": "6", "target": "17", "source_name": "elvis presley", "target_name": "civil rights", "weight": 1.0, "year": 2016}, {"source": "6", "target": "23", "source_name": "elvis presley", "target_name": "electronic dance music", "weight": 1.0, "year": 2016}, {"source": "6", "target": "29", "source_name": "elvis presley", "target_name": "rolling stone", "weight": 2.0, "year": 2016}, {"source": "6", "target": "36", "source_name": "elvis presley", "target_name": "music industry", "weight": 3.0, "year": 2016}, {"source": "6", "target": "40", "source_name": "elvis presley", "target_name": "musical instruments", "weight": 1.0, "year": 2016}, {"source": "6", "target": "41", "source_name": "elvis presley", "target_name": "youth culture", "weight": 1.0, "year": 2016}, {"source": "6", "target": "42", "source_name": "elvis presley", "target_name": "simon frith", "weight": 2.0, "year": 2016}, {"source": "6", "target": "47", "source_name": "elvis presley", "target_name": "hard rock", "weight": 1.0, "year": 2016}, {"source": "6", "target": "48", "source_name": "elvis presley", "target_name": "pop music", "weight": 1.0, "year": 2016}, {"source": "6", "target": "49", "source_name": "elvis presley", "target_name": "music theory", "weight": 1.0, "year": 2016}, {"source": "6", "target": "51", "source_name": "elvis presley", "target_name": "cultural identity", "weight": 1.0, "year": 2016}, {"source": "6", "target": "53", "source_name": "elvis presley", "target_name": "popular music", "weight": 9.0, "year": 2016}, {"source": "6", "target": "54", "source_name": "elvis presley", "target_name": "american popular music", "weight": 3.0, "year": 2016}, {"source": "6", "target": "56", "source_name": "elvis presley", "target_name": "bruce springsteen", "weight": 2.0, "year": 2016}, {"source": "6", "target": "60", "source_name": "elvis presley", "target_name": "cultural studies", "weight": 1.0, "year": 2016}, {"source": "6", "target": "67", "source_name": "elvis presley", "target_name": "rock art", "weight": 1.0, "year": 2016}, {"source": "6", "target": "70", "source_name": "elvis presley", "target_name": "world war", "weight": 1.0, "year": 2016}, {"source": "6", "target": "72", "source_name": "elvis presley", "target_name": "jimi hendrix", "weight": 1.0, "year": 2016}, {"source": "6", "target": "74", "source_name": "elvis presley", "target_name": "united states", "weight": 2.0, "year": 2016}, {"source": "6", "target": "75", "source_name": "elvis presley", "target_name": "world war ii", "weight": 1.0, "year": 2016}, {"source": "6", "target": "77", "source_name": "elvis presley", "target_name": "rock music", "weight": 5.0, "year": 2016}, {"source": "6", "target": "78", "source_name": "elvis presley", "target_name": "hip hop", "weight": 1.0, "year": 2016}, {"source": "6", "target": "79", "source_name": "elvis presley", "target_name": "popular culture", "weight": 2.0, "year": 2016}, {"source": "6", "target": "80", "source_name": "elvis presley", "target_name": "folk music", "weight": 1.0, "year": 2016}, {"source": "6", "target": "82", "source_name": "elvis presley", "target_name": "heavy metal", "weight": 1.0, "year": 2016}, {"source": "7", "target": "9", "source_name": "nineteenth century", "target_name": "compact disc", "weight": 1.0, "year": 2016}, {"source": "7", "target": "10", "source_name": "nineteenth century", "target_name": "african american", "weight": 1.0, "year": 2016}, {"source": "7", "target": "19", "source_name": "nineteenth century", "target_name": "music video", "weight": 1.0, "year": 2016}, {"source": "7", "target": "22", "source_name": "nineteenth century", "target_name": "chamber music", "weight": 1.0, "year": 2016}, {"source": "7", "target": "34", "source_name": "nineteenth century", "target_name": "mass media", "weight": 1.0, "year": 2016}, {"source": "7", "target": "36", "source_name": "nineteenth century", "target_name": "music industry", "weight": 2.0, "year": 2016}, {"source": "7", "target": "38", "source_name": "nineteenth century", "target_name": "summary additional listening", "weight": 1.0, "year": 2016}, {"source": "7", "target": "40", "source_name": "nineteenth century", "target_name": "musical instruments", "weight": 1.0, "year": 2016}, {"source": "7", "target": "43", "source_name": "nineteenth century", "target_name": "music education", "weight": 1.0, "year": 2016}, {"source": "7", "target": "45", "source_name": "nineteenth century", "target_name": "double bass", "weight": 2.0, "year": 2016}, {"source": "7", "target": "48", "source_name": "nineteenth century", "target_name": "pop music", "weight": 1.0, "year": 2016}, {"source": "7", "target": "50", "source_name": "nineteenth century", "target_name": "hollywood film", "weight": 1.0, "year": 2016}, {"source": "7", "target": "52", "source_name": "nineteenth century", "target_name": "folk song", "weight": 3.0, "year": 2016}, {"source": "7", "target": "53", "source_name": "nineteenth century", "target_name": "popular music", "weight": 4.0, "year": 2016}, {"source": "7", "target": "54", "source_name": "nineteenth century", "target_name": "american popular music", "weight": 1.0, "year": 2016}, {"source": "7", "target": "65", "source_name": "nineteenth century", "target_name": "country music", "weight": 1.0, "year": 2016}, {"source": "7", "target": "67", "source_name": "nineteenth century", "target_name": "rock art", "weight": 1.0, "year": 2016}, {"source": "7", "target": "69", "source_name": "nineteenth century", "target_name": "classical music", "weight": 4.0, "year": 2016}, {"source": "7", "target": "70", "source_name": "nineteenth century", "target_name": "world war", "weight": 2.0, "year": 2016}, {"source": "7", "target": "74", "source_name": "nineteenth century", "target_name": "united states", "weight": 2.0, "year": 2016}, {"source": "7", "target": "77", "source_name": "nineteenth century", "target_name": "rock music", "weight": 4.0, "year": 2016}, {"source": "7", "target": "79", "source_name": "nineteenth century", "target_name": "popular culture", "weight": 1.0, "year": 2016}, {"source": "7", "target": "80", "source_name": "nineteenth century", "target_name": "folk music", "weight": 3.0, "year": 2016}, {"source": "7", "target": "85", "source_name": "nineteenth century", "target_name": "jewish music", "weight": 1.0, "year": 2016}, {"source": "7", "target": "87", "source_name": "nineteenth century", "target_name": "music hall", "weight": 1.0, "year": 2016}, {"source": "7", "target": "89", "source_name": "nineteenth century", "target_name": "electronic music", "weight": 1.0, "year": 2016}, {"source": "8", "target": "20", "source_name": "christian rock", "target_name": "garage rock", "weight": 1.0, "year": 2016}, {"source": "8", "target": "36", "source_name": "christian rock", "target_name": "music industry", "weight": 1.0, "year": 2016}, {"source": "8", "target": "44", "source_name": "christian rock", "target_name": "alternative rock", "weight": 1.0, "year": 2016}, {"source": "8", "target": "53", "source_name": "christian rock", "target_name": "popular music", "weight": 2.0, "year": 2016}, {"source": "8", "target": "57", "source_name": "christian rock", "target_name": "north america", "weight": 1.0, "year": 2016}, {"source": "8", "target": "65", "source_name": "christian rock", "target_name": "country music", "weight": 1.0, "year": 2016}, {"source": "8", "target": "73", "source_name": "christian rock", "target_name": "southern rock", "weight": 1.0, "year": 2016}, {"source": "8", "target": "77", "source_name": "christian rock", "target_name": "rock music", "weight": 2.0, "year": 2016}, {"source": "8", "target": "79", "source_name": "christian rock", "target_name": "popular culture", "weight": 1.0, "year": 2016}, {"source": "8", "target": "80", "source_name": "christian rock", "target_name": "folk music", "weight": 1.0, "year": 2016}, {"source": "9", "target": "10", "source_name": "compact disc", "target_name": "african american", "weight": 1.0, "year": 2016}, {"source": "9", "target": "11", "source_name": "compact disc", "target_name": "south africa", "weight": 1.0, "year": 2016}, {"source": "9", "target": "18", "source_name": "compact disc", "target_name": "middle class", "weight": 1.0, "year": 2016}, {"source": "9", "target": "19", "source_name": "compact disc", "target_name": "music video", "weight": 1.0, "year": 2016}, {"source": "9", "target": "24", "source_name": "compact disc", "target_name": "punk rock", "weight": 1.0, "year": 2016}, {"source": "9", "target": "25", "source_name": "compact disc", "target_name": "russian rock", "weight": 1.0, "year": 2016}, {"source": "9", "target": "28", "source_name": "compact disc", "target_name": "high school", "weight": 1.0, "year": 2016}, {"source": "9", "target": "29", "source_name": "compact disc", "target_name": "rolling stone", "weight": 1.0, "year": 2016}, {"source": "9", "target": "30", "source_name": "compact disc", "target_name": "rock band", "weight": 1.0, "year": 2016}, {"source": "9", "target": "36", "source_name": "compact disc", "target_name": "music industry", "weight": 1.0, "year": 2016}, {"source": "9", "target": "37", "source_name": "compact disc", "target_name": "middle ages", "weight": 1.0, "year": 2016}, {"source": "9", "target": "46", "source_name": "compact disc", "target_name": "music festival", "weight": 1.0, "year": 2016}, {"source": "9", "target": "48", "source_name": "compact disc", "target_name": "pop music", "weight": 1.0, "year": 2016}, {"source": "9", "target": "51", "source_name": "compact disc", "target_name": "cultural identity", "weight": 1.0, "year": 2016}, {"source": "9", "target": "53", "source_name": "compact disc", "target_name": "popular music", "weight": 4.0, "year": 2016}, {"source": "9", "target": "61", "source_name": "compact disc", "target_name": "progressive rock", "weight": 1.0, "year": 2016}, {"source": "9", "target": "66", "source_name": "compact disc", "target_name": "hong kong", "weight": 1.0, "year": 2016}, {"source": "9", "target": "74", "source_name": "compact disc", "target_name": "united states", "weight": 1.0, "year": 2016}, {"source": "9", "target": "77", "source_name": "compact disc", "target_name": "rock music", "weight": 2.0, "year": 2016}, {"source": "9", "target": "78", "source_name": "compact disc", "target_name": "hip hop", "weight": 1.0, "year": 2016}, {"source": "9", "target": "79", "source_name": "compact disc", "target_name": "popular culture", "weight": 1.0, "year": 2016}, {"source": "9", "target": "80", "source_name": "compact disc", "target_name": "folk music", "weight": 3.0, "year": 2016}, {"source": "9", "target": "85", "source_name": "compact disc", "target_name": "jewish music", "weight": 2.0, "year": 2016}, {"source": "9", "target": "89", "source_name": "compact disc", "target_name": "electronic music", "weight": 1.0, "year": 2016}, {"source": "10", "target": "11", "source_name": "african american", "target_name": "south africa", "weight": 1.0, "year": 2016}, {"source": "10", "target": "15", "source_name": "african american", "target_name": "musical theatre", "weight": 1.0, "year": 2016}, {"source": "10", "target": "17", "source_name": "african american", "target_name": "civil rights", "weight": 2.0, "year": 2016}, {"source": "10", "target": "19", "source_name": "african american", "target_name": "music video", "weight": 1.0, "year": 2016}, {"source": "10", "target": "21", "source_name": "african american", "target_name": "social protest", "weight": 1.0, "year": 2016}, {"source": "10", "target": "22", "source_name": "african american", "target_name": "chamber music", "weight": 1.0, "year": 2016}, {"source": "10", "target": "23", "source_name": "african american", "target_name": "electronic dance music", "weight": 1.0, "year": 2016}, {"source": "10", "target": "24", "source_name": "african american", "target_name": "punk rock", "weight": 2.0, "year": 2016}, {"source": "10", "target": "36", "source_name": "african american", "target_name": "music industry", "weight": 2.0, "year": 2016}, {"source": "10", "target": "38", "source_name": "african american", "target_name": "summary additional listening", "weight": 1.0, "year": 2016}, {"source": "10", "target": "40", "source_name": "african american", "target_name": "musical instruments", "weight": 1.0, "year": 2016}, {"source": "10", "target": "52", "source_name": "african american", "target_name": "folk song", "weight": 1.0, "year": 2016}, {"source": "10", "target": "53", "source_name": "african american", "target_name": "popular music", "weight": 7.0, "year": 2016}, {"source": "10", "target": "54", "source_name": "african american", "target_name": "american popular music", "weight": 1.0, "year": 2016}, {"source": "10", "target": "61", "source_name": "african american", "target_name": "progressive rock", "weight": 1.0, "year": 2016}, {"source": "10", "target": "65", "source_name": "african american", "target_name": "country music", "weight": 1.0, "year": 2016}, {"source": "10", "target": "69", "source_name": "african american", "target_name": "classical music", "weight": 1.0, "year": 2016}, {"source": "10", "target": "74", "source_name": "african american", "target_name": "united states", "weight": 5.0, "year": 2016}, {"source": "10", "target": "75", "source_name": "african american", "target_name": "world war ii", "weight": 1.0, "year": 2016}, {"source": "10", "target": "77", "source_name": "african american", "target_name": "rock music", "weight": 2.0, "year": 2016}, {"source": "10", "target": "78", "source_name": "african american", "target_name": "hip hop", "weight": 1.0, "year": 2016}, {"source": "10", "target": "79", "source_name": "african american", "target_name": "popular culture", "weight": 2.0, "year": 2016}, {"source": "10", "target": "80", "source_name": "african american", "target_name": "folk music", "weight": 4.0, "year": 2016}, {"source": "10", "target": "82", "source_name": "african american", "target_name": "heavy metal", "weight": 1.0, "year": 2016}, {"source": "10", "target": "89", "source_name": "african american", "target_name": "electronic music", "weight": 1.0, "year": 2016}, {"source": "11", "target": "17", "source_name": "south africa", "target_name": "civil rights", "weight": 1.0, "year": 2016}, {"source": "11", "target": "21", "source_name": "south africa", "target_name": "social protest", "weight": 2.0, "year": 2016}, {"source": "11", "target": "23", "source_name": "south africa", "target_name": "electronic dance music", "weight": 1.0, "year": 2016}, {"source": "11", "target": "25", "source_name": "south africa", "target_name": "russian rock", "weight": 1.0, "year": 2016}, {"source": "11", "target": "36", "source_name": "south africa", "target_name": "music industry", "weight": 1.0, "year": 2016}, {"source": "11", "target": "43", "source_name": "south africa", "target_name": "music education", "weight": 1.0, "year": 2016}, {"source": "11", "target": "46", "source_name": "south africa", "target_name": "music festival", "weight": 3.0, "year": 2016}, {"source": "11", "target": "53", "source_name": "south africa", "target_name": "popular music", "weight": 5.0, "year": 2016}, {"source": "11", "target": "61", "source_name": "south africa", "target_name": "progressive rock", "weight": 1.0, "year": 2016}, {"source": "11", "target": "66", "source_name": "south africa", "target_name": "hong kong", "weight": 1.0, "year": 2016}, {"source": "11", "target": "74", "source_name": "south africa", "target_name": "united states", "weight": 3.0, "year": 2016}, {"source": "11", "target": "78", "source_name": "south africa", "target_name": "hip hop", "weight": 1.0, "year": 2016}, {"source": "11", "target": "80", "source_name": "south africa", "target_name": "folk music", "weight": 3.0, "year": 2016}, {"source": "11", "target": "85", "source_name": "south africa", "target_name": "jewish music", "weight": 1.0, "year": 2016}, {"source": "11", "target": "87", "source_name": "south africa", "target_name": "music hall", "weight": 1.0, "year": 2016}, {"source": "11", "target": "88", "source_name": "south africa", "target_name": "oxford university press", "weight": 1.0, "year": 2016}, {"source": "12", "target": "15", "source_name": "rock opera", "target_name": "musical theatre", "weight": 3.0, "year": 2016}, {"source": "12", "target": "33", "source_name": "rock opera", "target_name": "jesus christ", "weight": 2.0, "year": 2016}, {"source": "12", "target": "41", "source_name": "rock opera", "target_name": "youth culture", "weight": 1.0, "year": 2016}, {"source": "12", "target": "53", "source_name": "rock opera", "target_name": "popular music", "weight": 1.0, "year": 2016}, {"source": "12", "target": "57", "source_name": "rock opera", "target_name": "north america", "weight": 1.0, "year": 2016}, {"source": "12", "target": "77", "source_name": "rock opera", "target_name": "rock music", "weight": 2.0, "year": 2016}, {"source": "12", "target": "79", "source_name": "rock opera", "target_name": "popular culture", "weight": 1.0, "year": 2016}, {"source": "15", "target": "33", "source_name": "musical theatre", "target_name": "jesus christ", "weight": 3.0, "year": 2016}, {"source": "15", "target": "53", "source_name": "musical theatre", "target_name": "popular music", "weight": 5.0, "year": 2016}, {"source": "15", "target": "54", "source_name": "musical theatre", "target_name": "american popular music", "weight": 3.0, "year": 2016}, {"source": "15", "target": "57", "source_name": "musical theatre", "target_name": "north america", "weight": 2.0, "year": 2016}, {"source": "15", "target": "70", "source_name": "musical theatre", "target_name": "world war", "weight": 1.0, "year": 2016}, {"source": "15", "target": "74", "source_name": "musical theatre", "target_name": "united states", "weight": 1.0, "year": 2016}, {"source": "15", "target": "77", "source_name": "musical theatre", "target_name": "rock music", "weight": 8.0, "year": 2016}, {"source": "15", "target": "87", "source_name": "musical theatre", "target_name": "music hall", "weight": 1.0, "year": 2016}, {"source": "16", "target": "29", "source_name": "bob dylan", "target_name": "rolling stone", "weight": 4.0, "year": 2016}, {"source": "16", "target": "30", "source_name": "bob dylan", "target_name": "rock band", "weight": 2.0, "year": 2016}, {"source": "16", "target": "36", "source_name": "bob dylan", "target_name": "music industry", "weight": 3.0, "year": 2016}, {"source": "16", "target": "42", "source_name": "bob dylan", "target_name": "simon frith", "weight": 1.0, "year": 2016}, {"source": "16", "target": "44", "source_name": "bob dylan", "target_name": "alternative rock", "weight": 1.0, "year": 2016}, {"source": "16", "target": "48", "source_name": "bob dylan", "target_name": "pop music", "weight": 3.0, "year": 2016}, {"source": "16", "target": "52", "source_name": "bob dylan", "target_name": "folk song", "weight": 1.0, "year": 2016}, {"source": "16", "target": "53", "source_name": "bob dylan", "target_name": "popular music", "weight": 10.0, "year": 2016}, {"source": "16", "target": "54", "source_name": "bob dylan", "target_name": "american popular music", "weight": 1.0, "year": 2016}, {"source": "16", "target": "56", "source_name": "bob dylan", "target_name": "bruce springsteen", "weight": 1.0, "year": 2016}, {"source": "16", "target": "69", "source_name": "bob dylan", "target_name": "classical music", "weight": 1.0, "year": 2016}, {"source": "16", "target": "70", "source_name": "bob dylan", "target_name": "world war", "weight": 1.0, "year": 2016}, {"source": "16", "target": "72", "source_name": "bob dylan", "target_name": "jimi hendrix", "weight": 2.0, "year": 2016}, {"source": "16", "target": "75", "source_name": "bob dylan", "target_name": "world war ii", "weight": 1.0, "year": 2016}, {"source": "16", "target": "77", "source_name": "bob dylan", "target_name": "rock music", "weight": 7.0, "year": 2016}, {"source": "16", "target": "79", "source_name": "bob dylan", "target_name": "popular culture", "weight": 3.0, "year": 2016}, {"source": "16", "target": "80", "source_name": "bob dylan", "target_name": "folk music", "weight": 5.0, "year": 2016}, {"source": "17", "target": "21", "source_name": "civil rights", "target_name": "social protest", "weight": 1.0, "year": 2016}, {"source": "17", "target": "30", "source_name": "civil rights", "target_name": "rock band", "weight": 1.0, "year": 2016}, {"source": "17", "target": "41", "source_name": "civil rights", "target_name": "youth culture", "weight": 1.0, "year": 2016}, {"source": "17", "target": "53", "source_name": "civil rights", "target_name": "popular music", "weight": 4.0, "year": 2016}, {"source": "17", "target": "54", "source_name": "civil rights", "target_name": "american popular music", "weight": 1.0, "year": 2016}, {"source": "17", "target": "61", "source_name": "civil rights", "target_name": "progressive rock", "weight": 1.0, "year": 2016}, {"source": "17", "target": "70", "source_name": "civil rights", "target_name": "world war", "weight": 1.0, "year": 2016}, {"source": "17", "target": "73", "source_name": "civil rights", "target_name": "southern rock", "weight": 1.0, "year": 2016}, {"source": "17", "target": "74", "source_name": "civil rights", "target_name": "united states", "weight": 3.0, "year": 2016}, {"source": "17", "target": "75", "source_name": "civil rights", "target_name": "world war ii", "weight": 1.0, "year": 2016}, {"source": "17", "target": "77", "source_name": "civil rights", "target_name": "rock music", "weight": 3.0, "year": 2016}, {"source": "17", "target": "79", "source_name": "civil rights", "target_name": "popular culture", "weight": 1.0, "year": 2016}, {"source": "17", "target": "80", "source_name": "civil rights", "target_name": "folk music", "weight": 2.0, "year": 2016}, {"source": "18", "target": "19", "source_name": "middle class", "target_name": "music video", "weight": 1.0, "year": 2016}, {"source": "18", "target": "28", "source_name": "middle class", "target_name": "high school", "weight": 1.0, "year": 2016}, {"source": "18", "target": "30", "source_name": "middle class", "target_name": "rock band", "weight": 2.0, "year": 2016}, {"source": "18", "target": "48", "source_name": "middle class", "target_name": "pop music", "weight": 1.0, "year": 2016}, {"source": "18", "target": "53", "source_name": "middle class", "target_name": "popular music", "weight": 2.0, "year": 2016}, {"source": "18", "target": "61", "source_name": "middle class", "target_name": "progressive rock", "weight": 2.0, "year": 2016}, {"source": "18", "target": "77", "source_name": "middle class", "target_name": "rock music", "weight": 2.0, "year": 2016}, {"source": "19", "target": "22", "source_name": "music video", "target_name": "chamber music", "weight": 1.0, "year": 2016}, {"source": "19", "target": "28", "source_name": "music video", "target_name": "high school", "weight": 1.0, "year": 2016}, {"source": "19", "target": "30", "source_name": "music video", "target_name": "rock band", "weight": 3.0, "year": 2016}, {"source": "19", "target": "36", "source_name": "music video", "target_name": "music industry", "weight": 2.0, "year": 2016}, {"source": "19", "target": "38", "source_name": "music video", "target_name": "summary additional listening", "weight": 1.0, "year": 2016}, {"source": "19", "target": "40", "source_name": "music video", "target_name": "musical instruments", "weight": 1.0, "year": 2016}, {"source": "19", "target": "47", "source_name": "music video", "target_name": "hard rock", "weight": 1.0, "year": 2016}, {"source": "19", "target": "48", "source_name": "music video", "target_name": "pop music", "weight": 3.0, "year": 2016}, {"source": "19", "target": "49", "source_name": "music video", "target_name": "music theory", "weight": 1.0, "year": 2016}, {"source": "19", "target": "51", "source_name": "music video", "target_name": "cultural identity", "weight": 2.0, "year": 2016}, {"source": "19", "target": "52", "source_name": "music video", "target_name": "folk song", "weight": 1.0, "year": 2016}, {"source": "19", "target": "53", "source_name": "music video", "target_name": "popular music", "weight": 8.0, "year": 2016}, {"source": "19", "target": "54", "source_name": "music video", "target_name": "american popular music", "weight": 1.0, "year": 2016}, {"source": "19", "target": "61", "source_name": "music video", "target_name": "progressive rock", "weight": 1.0, "year": 2016}, {"source": "19", "target": "65", "source_name": "music video", "target_name": "country music", "weight": 4.0, "year": 2016}, {"source": "19", "target": "69", "source_name": "music video", "target_name": "classical music", "weight": 1.0, "year": 2016}, {"source": "19", "target": "72", "source_name": "music video", "target_name": "jimi hendrix", "weight": 1.0, "year": 2016}, {"source": "19", "target": "74", "source_name": "music video", "target_name": "united states", "weight": 2.0, "year": 2016}, {"source": "19", "target": "76", "source_name": "music video", "target_name": "los angeles", "weight": 1.0, "year": 2016}, {"source": "19", "target": "77", "source_name": "music video", "target_name": "rock music", "weight": 9.0, "year": 2016}, {"source": "19", "target": "78", "source_name": "music video", "target_name": "hip hop", "weight": 2.0, "year": 2016}, {"source": "19", "target": "80", "source_name": "music video", "target_name": "folk music", "weight": 1.0, "year": 2016}, {"source": "19", "target": "82", "source_name": "music video", "target_name": "heavy metal", "weight": 1.0, "year": 2016}, {"source": "19", "target": "89", "source_name": "music video", "target_name": "electronic music", "weight": 1.0, "year": 2016}, {"source": "19", "target": "90", "source_name": "music video", "target_name": "blues rock", "weight": 1.0, "year": 2016}, {"source": "20", "target": "24", "source_name": "garage rock", "target_name": "punk rock", "weight": 1.0, "year": 2016}, {"source": "20", "target": "27", "source_name": "garage rock", "target_name": "pop rock", "weight": 1.0, "year": 2016}, {"source": "20", "target": "29", "source_name": "garage rock", "target_name": "rolling stone", "weight": 1.0, "year": 2016}, {"source": "20", "target": "30", "source_name": "garage rock", "target_name": "rock band", "weight": 2.0, "year": 2016}, {"source": "20", "target": "43", "source_name": "garage rock", "target_name": "music education", "weight": 1.0, "year": 2016}, {"source": "20", "target": "44", "source_name": "garage rock", "target_name": "alternative rock", "weight": 2.0, "year": 2016}, {"source": "20", "target": "47", "source_name": "garage rock", "target_name": "hard rock", "weight": 1.0, "year": 2016}, {"source": "20", "target": "48", "source_name": "garage rock", "target_name": "pop music", "weight": 1.0, "year": 2016}, {"source": "20", "target": "53", "source_name": "garage rock", "target_name": "popular music", "weight": 4.0, "year": 2016}, {"source": "20", "target": "57", "source_name": "garage rock", "target_name": "north america", "weight": 1.0, "year": 2016}, {"source": "20", "target": "65", "source_name": "garage rock", "target_name": "country music", "weight": 1.0, "year": 2016}, {"source": "20", "target": "73", "source_name": "garage rock", "target_name": "southern rock", "weight": 1.0, "year": 2016}, {"source": "20", "target": "77", "source_name": "garage rock", "target_name": "rock music", "weight": 5.0, "year": 2016}, {"source": "20", "target": "80", "source_name": "garage rock", "target_name": "folk music", "weight": 1.0, "year": 2016}, {"source": "21", "target": "47", "source_name": "social protest", "target_name": "hard rock", "weight": 1.0, "year": 2016}, {"source": "21", "target": "48", "source_name": "social protest", "target_name": "pop music", "weight": 1.0, "year": 2016}, {"source": "21", "target": "53", "source_name": "social protest", "target_name": "popular music", "weight": 4.0, "year": 2016}, {"source": "21", "target": "57", "source_name": "social protest", "target_name": "north america", "weight": 2.0, "year": 2016}, {"source": "21", "target": "61", "source_name": "social protest", "target_name": "progressive rock", "weight": 1.0, "year": 2016}, {"source": "21", "target": "71", "source_name": "social protest", "target_name": "latin american", "weight": 1.0, "year": 2016}, {"source": "21", "target": "74", "source_name": "social protest", "target_name": "united states", "weight": 2.0, "year": 2016}, {"source": "21", "target": "77", "source_name": "social protest", "target_name": "rock music", "weight": 1.0, "year": 2016}, {"source": "21", "target": "80", "source_name": "social protest", "target_name": "folk music", "weight": 2.0, "year": 2016}, {"source": "21", "target": "82", "source_name": "social protest", "target_name": "heavy metal", "weight": 1.0, "year": 2016}, {"source": "21", "target": "87", "source_name": "social protest", "target_name": "music hall", "weight": 1.0, "year": 2016}, {"source": "22", "target": "35", "source_name": "chamber music", "target_name": "ancient greek", "weight": 1.0, "year": 2016}, {"source": "22", "target": "36", "source_name": "chamber music", "target_name": "music industry", "weight": 1.0, "year": 2016}, {"source": "22", "target": "38", "source_name": "chamber music", "target_name": "summary additional listening", "weight": 1.0, "year": 2016}, {"source": "22", "target": "40", "source_name": "chamber music", "target_name": "musical instruments", "weight": 1.0, "year": 2016}, {"source": "22", "target": "48", "source_name": "chamber music", "target_name": "pop music", "weight": 1.0, "year": 2016}, {"source": "22", "target": "52", "source_name": "chamber music", "target_name": "folk song", "weight": 1.0, "year": 2016}, {"source": "22", "target": "53", "source_name": "chamber music", "target_name": "popular music", "weight": 2.0, "year": 2016}, {"source": "22", "target": "54", "source_name": "chamber music", "target_name": "american popular music", "weight": 1.0, "year": 2016}, {"source": "22", "target": "65", "source_name": "chamber music", "target_name": "country music", "weight": 2.0, "year": 2016}, {"source": "22", "target": "69", "source_name": "chamber music", "target_name": "classical music", "weight": 3.0, "year": 2016}, {"source": "22", "target": "74", "source_name": "chamber music", "target_name": "united states", "weight": 1.0, "year": 2016}, {"source": "22", "target": "77", "source_name": "chamber music", "target_name": "rock music", "weight": 1.0, "year": 2016}, {"source": "22", "target": "79", "source_name": "chamber music", "target_name": "popular culture", "weight": 1.0, "year": 2016}, {"source": "22", "target": "80", "source_name": "chamber music", "target_name": "folk music", "weight": 2.0, "year": 2016}, {"source": "22", "target": "89", "source_name": "chamber music", "target_name": "electronic music", "weight": 3.0, "year": 2016}, {"source": "23", "target": "24", "source_name": "electronic dance music", "target_name": "punk rock", "weight": 1.0, "year": 2016}, {"source": "23", "target": "36", "source_name": "electronic dance music", "target_name": "music industry", "weight": 2.0, "year": 2016}, {"source": "23", "target": "42", "source_name": "electronic dance music", "target_name": "simon frith", "weight": 2.0, "year": 2016}, {"source": "23", "target": "47", "source_name": "electronic dance music", "target_name": "hard rock", "weight": 1.0, "year": 2016}, {"source": "23", "target": "53", "source_name": "electronic dance music", "target_name": "popular music", "weight": 9.0, "year": 2016}, {"source": "23", "target": "56", "source_name": "electronic dance music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2016}, {"source": "23", "target": "57", "source_name": "electronic dance music", "target_name": "north america", "weight": 1.0, "year": 2016}, {"source": "23", "target": "60", "source_name": "electronic dance music", "target_name": "cultural studies", "weight": 2.0, "year": 2016}, {"source": "23", "target": "67", "source_name": "electronic dance music", "target_name": "rock art", "weight": 1.0, "year": 2016}, {"source": "23", "target": "74", "source_name": "electronic dance music", "target_name": "united states", "weight": 2.0, "year": 2016}, {"source": "23", "target": "76", "source_name": "electronic dance music", "target_name": "los angeles", "weight": 1.0, "year": 2016}, {"source": "23", "target": "77", "source_name": "electronic dance music", "target_name": "rock music", "weight": 1.0, "year": 2016}, {"source": "23", "target": "78", "source_name": "electronic dance music", "target_name": "hip hop", "weight": 1.0, "year": 2016}, {"source": "23", "target": "79", "source_name": "electronic dance music", "target_name": "popular culture", "weight": 1.0, "year": 2016}, {"source": "23", "target": "82", "source_name": "electronic dance music", "target_name": "heavy metal", "weight": 3.0, "year": 2016}, {"source": "23", "target": "88", "source_name": "electronic dance music", "target_name": "oxford university press", "weight": 1.0, "year": 2016}, {"source": "23", "target": "89", "source_name": "electronic dance music", "target_name": "electronic music", "weight": 4.0, "year": 2016}, {"source": "24", "target": "27", "source_name": "punk rock", "target_name": "pop rock", "weight": 1.0, "year": 2016}, {"source": "24", "target": "30", "source_name": "punk rock", "target_name": "rock band", "weight": 1.0, "year": 2016}, {"source": "24", "target": "36", "source_name": "punk rock", "target_name": "music industry", "weight": 1.0, "year": 2016}, {"source": "24", "target": "41", "source_name": "punk rock", "target_name": "youth culture", "weight": 2.0, "year": 2016}, {"source": "24", "target": "42", "source_name": "punk rock", "target_name": "simon frith", "weight": 1.0, "year": 2016}, {"source": "24", "target": "44", "source_name": "punk rock", "target_name": "alternative rock", "weight": 4.0, "year": 2016}, {"source": "24", "target": "47", "source_name": "punk rock", "target_name": "hard rock", "weight": 5.0, "year": 2016}, {"source": "24", "target": "48", "source_name": "punk rock", "target_name": "pop music", "weight": 4.0, "year": 2016}, {"source": "24", "target": "51", "source_name": "punk rock", "target_name": "cultural identity", "weight": 1.0, "year": 2016}, {"source": "24", "target": "53", "source_name": "punk rock", "target_name": "popular music", "weight": 13.0, "year": 2016}, {"source": "24", "target": "57", "source_name": "punk rock", "target_name": "north america", "weight": 1.0, "year": 2016}, {"source": "24", "target": "61", "source_name": "punk rock", "target_name": "progressive rock", "weight": 3.0, "year": 2016}, {"source": "24", "target": "65", "source_name": "punk rock", "target_name": "country music", "weight": 1.0, "year": 2016}, {"source": "24", "target": "69", "source_name": "punk rock", "target_name": "classical music", "weight": 1.0, "year": 2016}, {"source": "24", "target": "74", "source_name": "punk rock", "target_name": "united states", "weight": 3.0, "year": 2016}, {"source": "24", "target": "77", "source_name": "punk rock", "target_name": "rock music", "weight": 12.0, "year": 2016}, {"source": "24", "target": "78", "source_name": "punk rock", "target_name": "hip hop", "weight": 1.0, "year": 2016}, {"source": "24", "target": "79", "source_name": "punk rock", "target_name": "popular culture", "weight": 1.0, "year": 2016}, {"source": "24", "target": "80", "source_name": "punk rock", "target_name": "folk music", "weight": 1.0, "year": 2016}, {"source": "24", "target": "82", "source_name": "punk rock", "target_name": "heavy metal", "weight": 6.0, "year": 2016}, {"source": "25", "target": "30", "source_name": "russian rock", "target_name": "rock band", "weight": 1.0, "year": 2016}, {"source": "25", "target": "37", "source_name": "russian rock", "target_name": "middle ages", "weight": 1.0, "year": 2016}, {"source": "25", "target": "46", "source_name": "russian rock", "target_name": "music festival", "weight": 1.0, "year": 2016}, {"source": "25", "target": "53", "source_name": "russian rock", "target_name": "popular music", "weight": 2.0, "year": 2016}, {"source": "25", "target": "66", "source_name": "russian rock", "target_name": "hong kong", "weight": 1.0, "year": 2016}, {"source": "25", "target": "77", "source_name": "russian rock", "target_name": "rock music", "weight": 2.0, "year": 2016}, {"source": "25", "target": "78", "source_name": "russian rock", "target_name": "hip hop", "weight": 1.0, "year": 2016}, {"source": "25", "target": "80", "source_name": "russian rock", "target_name": "folk music", "weight": 1.0, "year": 2016}, {"source": "25", "target": "85", "source_name": "russian rock", "target_name": "jewish music", "weight": 1.0, "year": 2016}, {"source": "26", "target": "43", "source_name": "information technology", "target_name": "music education", "weight": 1.0, "year": 2016}, {"source": "27", "target": "44", "source_name": "pop rock", "target_name": "alternative rock", "weight": 1.0, "year": 2016}, {"source": "27", "target": "47", "source_name": "pop rock", "target_name": "hard rock", "weight": 1.0, "year": 2016}, {"source": "27", "target": "48", "source_name": "pop rock", "target_name": "pop music", "weight": 1.0, "year": 2016}, {"source": "27", "target": "53", "source_name": "pop rock", "target_name": "popular music", "weight": 1.0, "year": 2016}, {"source": "27", "target": "64", "source_name": "pop rock", "target_name": "english language", "weight": 1.0, "year": 2016}, {"source": "27", "target": "65", "source_name": "pop rock", "target_name": "country music", "weight": 1.0, "year": 2016}, {"source": "27", "target": "66", "source_name": "pop rock", "target_name": "hong kong", "weight": 1.0, "year": 2016}, {"source": "27", "target": "67", "source_name": "pop rock", "target_name": "rock art", "weight": 1.0, "year": 2016}, {"source": "27", "target": "77", "source_name": "pop rock", "target_name": "rock music", "weight": 1.0, "year": 2016}, {"source": "27", "target": "83", "source_name": "pop rock", "target_name": "folk rock", "weight": 1.0, "year": 2016}, {"source": "28", "target": "30", "source_name": "high school", "target_name": "rock band", "weight": 1.0, "year": 2016}, {"source": "28", "target": "37", "source_name": "high school", "target_name": "middle ages", "weight": 1.0, "year": 2016}, {"source": "28", "target": "48", "source_name": "high school", "target_name": "pop music", "weight": 1.0, "year": 2016}, {"source": "28", "target": "61", "source_name": "high school", "target_name": "progressive rock", "weight": 1.0, "year": 2016}, {"source": "28", "target": "77", "source_name": "high school", "target_name": "rock music", "weight": 5.0, "year": 2016}, {"source": "28", "target": "82", "source_name": "high school", "target_name": "heavy metal", "weight": 1.0, "year": 2016}, {"source": "29", "target": "30", "source_name": "rolling stone", "target_name": "rock band", "weight": 1.0, "year": 2016}, {"source": "29", "target": "36", "source_name": "rolling stone", "target_name": "music industry", "weight": 2.0, "year": 2016}, {"source": "29", "target": "42", "source_name": "rolling stone", "target_name": "simon frith", "weight": 1.0, "year": 2016}, {"source": "29", "target": "44", "source_name": "rolling stone", "target_name": "alternative rock", "weight": 1.0, "year": 2016}, {"source": "29", "target": "48", "source_name": "rolling stone", "target_name": "pop music", "weight": 4.0, "year": 2016}, {"source": "29", "target": "53", "source_name": "rolling stone", "target_name": "popular music", "weight": 8.0, "year": 2016}, {"source": "29", "target": "55", "source_name": "rolling stone", "target_name": "rock criticism", "weight": 4.0, "year": 2016}, {"source": "29", "target": "56", "source_name": "rolling stone", "target_name": "bruce springsteen", "weight": 2.0, "year": 2016}, {"source": "29", "target": "62", "source_name": "rolling stone", "target_name": "led zeppelin", "weight": 1.0, "year": 2016}, {"source": "29", "target": "72", "source_name": "rolling stone", "target_name": "jimi hendrix", "weight": 2.0, "year": 2016}, {"source": "29", "target": "74", "source_name": "rolling stone", "target_name": "united states", "weight": 1.0, "year": 2016}, {"source": "29", "target": "77", "source_name": "rolling stone", "target_name": "rock music", "weight": 9.0, "year": 2016}, {"source": "29", "target": "79", "source_name": "rolling stone", "target_name": "popular culture", "weight": 3.0, "year": 2016}, {"source": "29", "target": "80", "source_name": "rolling stone", "target_name": "folk music", "weight": 1.0, "year": 2016}, {"source": "29", "target": "87", "source_name": "rolling stone", "target_name": "music hall", "weight": 2.0, "year": 2016}, {"source": "30", "target": "36", "source_name": "rock band", "target_name": "music industry", "weight": 2.0, "year": 2016}, {"source": "30", "target": "37", "source_name": "rock band", "target_name": "middle ages", "weight": 2.0, "year": 2016}, {"source": "30", "target": "41", "source_name": "rock band", "target_name": "youth culture", "weight": 1.0, "year": 2016}, {"source": "30", "target": "43", "source_name": "rock band", "target_name": "music education", "weight": 3.0, "year": 2016}, {"source": "30", "target": "44", "source_name": "rock band", "target_name": "alternative rock", "weight": 1.0, "year": 2016}, {"source": "30", "target": "47", "source_name": "rock band", "target_name": "hard rock", "weight": 1.0, "year": 2016}, {"source": "30", "target": "48", "source_name": "rock band", "target_name": "pop music", "weight": 1.0, "year": 2016}, {"source": "30", "target": "52", "source_name": "rock band", "target_name": "folk song", "weight": 2.0, "year": 2016}, {"source": "30", "target": "53", "source_name": "rock band", "target_name": "popular music", "weight": 22.0, "year": 2016}, {"source": "30", "target": "54", "source_name": "rock band", "target_name": "american popular music", "weight": 1.0, "year": 2016}, {"source": "30", "target": "55", "source_name": "rock band", "target_name": "rock criticism", "weight": 1.0, "year": 2016}, {"source": "30", "target": "61", "source_name": "rock band", "target_name": "progressive rock", "weight": 11.0, "year": 2016}, {"source": "30", "target": "62", "source_name": "rock band", "target_name": "led zeppelin", "weight": 1.0, "year": 2016}, {"source": "30", "target": "65", "source_name": "rock band", "target_name": "country music", "weight": 1.0, "year": 2016}, {"source": "30", "target": "67", "source_name": "rock band", "target_name": "rock art", "weight": 1.0, "year": 2016}, {"source": "30", "target": "69", "source_name": "rock band", "target_name": "classical music", "weight": 4.0, "year": 2016}, {"source": "30", "target": "72", "source_name": "rock band", "target_name": "jimi hendrix", "weight": 2.0, "year": 2016}, {"source": "30", "target": "73", "source_name": "rock band", "target_name": "southern rock", "weight": 2.0, "year": 2016}, {"source": "30", "target": "74", "source_name": "rock band", "target_name": "united states", "weight": 2.0, "year": 2016}, {"source": "30", "target": "76", "source_name": "rock band", "target_name": "los angeles", "weight": 1.0, "year": 2016}, {"source": "30", "target": "77", "source_name": "rock band", "target_name": "rock music", "weight": 34.0, "year": 2016}, {"source": "30", "target": "79", "source_name": "rock band", "target_name": "popular culture", "weight": 1.0, "year": 2016}, {"source": "30", "target": "80", "source_name": "rock band", "target_name": "folk music", "weight": 2.0, "year": 2016}, {"source": "30", "target": "82", "source_name": "rock band", "target_name": "heavy metal", "weight": 3.0, "year": 2016}, {"source": "30", "target": "83", "source_name": "rock band", "target_name": "folk rock", "weight": 1.0, "year": 2016}, {"source": "30", "target": "87", "source_name": "rock band", "target_name": "music hall", "weight": 1.0, "year": 2016}, {"source": "31", "target": "69", "source_name": "post modernism", "target_name": "classical music", "weight": 1.0, "year": 2016}, {"source": "32", "target": "43", "source_name": "higher education", "target_name": "music education", "weight": 3.0, "year": 2016}, {"source": "33", "target": "53", "source_name": "jesus christ", "target_name": "popular music", "weight": 1.0, "year": 2016}, {"source": "33", "target": "70", "source_name": "jesus christ", "target_name": "world war", "weight": 1.0, "year": 2016}, {"source": "33", "target": "77", "source_name": "jesus christ", "target_name": "rock music", "weight": 4.0, "year": 2016}, {"source": "34", "target": "36", "source_name": "mass media", "target_name": "music industry", "weight": 1.0, "year": 2016}, {"source": "34", "target": "40", "source_name": "mass media", "target_name": "musical instruments", "weight": 1.0, "year": 2016}, {"source": "34", "target": "41", "source_name": "mass media", "target_name": "youth culture", "weight": 1.0, "year": 2016}, {"source": "34", "target": "43", "source_name": "mass media", "target_name": "music education", "weight": 2.0, "year": 2016}, {"source": "34", "target": "46", "source_name": "mass media", "target_name": "music festival", "weight": 1.0, "year": 2016}, {"source": "34", "target": "48", "source_name": "mass media", "target_name": "pop music", "weight": 2.0, "year": 2016}, {"source": "34", "target": "51", "source_name": "mass media", "target_name": "cultural identity", "weight": 1.0, "year": 2016}, {"source": "34", "target": "52", "source_name": "mass media", "target_name": "folk song", "weight": 2.0, "year": 2016}, {"source": "34", "target": "53", "source_name": "mass media", "target_name": "popular music", "weight": 6.0, "year": 2016}, {"source": "34", "target": "60", "source_name": "mass media", "target_name": "cultural studies", "weight": 1.0, "year": 2016}, {"source": "34", "target": "65", "source_name": "mass media", "target_name": "country music", "weight": 1.0, "year": 2016}, {"source": "34", "target": "66", "source_name": "mass media", "target_name": "hong kong", "weight": 1.0, "year": 2016}, {"source": "34", "target": "67", "source_name": "mass media", "target_name": "rock art", "weight": 1.0, "year": 2016}, {"source": "34", "target": "69", "source_name": "mass media", "target_name": "classical music", "weight": 1.0, "year": 2016}, {"source": "34", "target": "77", "source_name": "mass media", "target_name": "rock music", "weight": 4.0, "year": 2016}, {"source": "34", "target": "79", "source_name": "mass media", "target_name": "popular culture", "weight": 2.0, "year": 2016}, {"source": "35", "target": "43", "source_name": "ancient greek", "target_name": "music education", "weight": 1.0, "year": 2016}, {"source": "35", "target": "65", "source_name": "ancient greek", "target_name": "country music", "weight": 1.0, "year": 2016}, {"source": "35", "target": "77", "source_name": "ancient greek", "target_name": "rock music", "weight": 1.0, "year": 2016}, {"source": "35", "target": "80", "source_name": "ancient greek", "target_name": "folk music", "weight": 1.0, "year": 2016}, {"source": "35", "target": "89", "source_name": "ancient greek", "target_name": "electronic music", "weight": 1.0, "year": 2016}, {"source": "36", "target": "38", "source_name": "music industry", "target_name": "summary additional listening", "weight": 1.0, "year": 2016}, {"source": "36", "target": "40", "source_name": "music industry", "target_name": "musical instruments", "weight": 1.0, "year": 2016}, {"source": "36", "target": "41", "source_name": "music industry", "target_name": "youth culture", "weight": 2.0, "year": 2016}, {"source": "36", "target": "42", "source_name": "music industry", "target_name": "simon frith", "weight": 2.0, "year": 2016}, {"source": "36", "target": "43", "source_name": "music industry", "target_name": "music education", "weight": 2.0, "year": 2016}, {"source": "36", "target": "44", "source_name": "music industry", "target_name": "alternative rock", "weight": 1.0, "year": 2016}, {"source": "36", "target": "46", "source_name": "music industry", "target_name": "music festival", "weight": 1.0, "year": 2016}, {"source": "36", "target": "47", "source_name": "music industry", "target_name": "hard rock", "weight": 3.0, "year": 2016}, {"source": "36", "target": "48", "source_name": "music industry", "target_name": "pop music", "weight": 10.0, "year": 2016}, {"source": "36", "target": "49", "source_name": "music industry", "target_name": "music theory", "weight": 1.0, "year": 2016}, {"source": "36", "target": "50", "source_name": "music industry", "target_name": "hollywood film", "weight": 1.0, "year": 2016}, {"source": "36", "target": "51", "source_name": "music industry", "target_name": "cultural identity", "weight": 3.0, "year": 2016}, {"source": "36", "target": "52", "source_name": "music industry", "target_name": "folk song", "weight": 1.0, "year": 2016}, {"source": "36", "target": "53", "source_name": "music industry", "target_name": "popular music", "weight": 34.0, "year": 2016}, {"source": "36", "target": "54", "source_name": "music industry", "target_name": "american popular music", "weight": 3.0, "year": 2016}, {"source": "36", "target": "55", "source_name": "music industry", "target_name": "rock criticism", "weight": 3.0, "year": 2016}, {"source": "36", "target": "56", "source_name": "music industry", "target_name": "bruce springsteen", "weight": 2.0, "year": 2016}, {"source": "36", "target": "60", "source_name": "music industry", "target_name": "cultural studies", "weight": 2.0, "year": 2016}, {"source": "36", "target": "61", "source_name": "music industry", "target_name": "progressive rock", "weight": 3.0, "year": 2016}, {"source": "36", "target": "62", "source_name": "music industry", "target_name": "led zeppelin", "weight": 1.0, "year": 2016}, {"source": "36", "target": "64", "source_name": "music industry", "target_name": "english language", "weight": 1.0, "year": 2016}, {"source": "36", "target": "65", "source_name": "music industry", "target_name": "country music", "weight": 2.0, "year": 2016}, {"source": "36", "target": "66", "source_name": "music industry", "target_name": "hong kong", "weight": 1.0, "year": 2016}, {"source": "36", "target": "67", "source_name": "music industry", "target_name": "rock art", "weight": 1.0, "year": 2016}, {"source": "36", "target": "68", "source_name": "music industry", "target_name": "hearing loss", "weight": 1.0, "year": 2016}, {"source": "36", "target": "69", "source_name": "music industry", "target_name": "classical music", "weight": 6.0, "year": 2016}, {"source": "36", "target": "70", "source_name": "music industry", "target_name": "world war", "weight": 2.0, "year": 2016}, {"source": "36", "target": "72", "source_name": "music industry", "target_name": "jimi hendrix", "weight": 4.0, "year": 2016}, {"source": "36", "target": "74", "source_name": "music industry", "target_name": "united states", "weight": 6.0, "year": 2016}, {"source": "36", "target": "75", "source_name": "music industry", "target_name": "world war ii", "weight": 3.0, "year": 2016}, {"source": "36", "target": "76", "source_name": "music industry", "target_name": "los angeles", "weight": 2.0, "year": 2016}, {"source": "36", "target": "77", "source_name": "music industry", "target_name": "rock music", "weight": 24.0, "year": 2016}, {"source": "36", "target": "78", "source_name": "music industry", "target_name": "hip hop", "weight": 5.0, "year": 2016}, {"source": "36", "target": "79", "source_name": "music industry", "target_name": "popular culture", "weight": 5.0, "year": 2016}, {"source": "36", "target": "80", "source_name": "music industry", "target_name": "folk music", "weight": 5.0, "year": 2016}, {"source": "36", "target": "82", "source_name": "music industry", "target_name": "heavy metal", "weight": 2.0, "year": 2016}, {"source": "36", "target": "83", "source_name": "music industry", "target_name": "folk rock", "weight": 1.0, "year": 2016}, {"source": "36", "target": "87", "source_name": "music industry", "target_name": "music hall", "weight": 1.0, "year": 2016}, {"source": "36", "target": "88", "source_name": "music industry", "target_name": "oxford university press", "weight": 2.0, "year": 2016}, {"source": "36", "target": "89", "source_name": "music industry", "target_name": "electronic music", "weight": 2.0, "year": 2016}, {"source": "37", "target": "44", "source_name": "middle ages", "target_name": "alternative rock", "weight": 1.0, "year": 2016}, {"source": "37", "target": "58", "source_name": "middle ages", "target_name": "music therapy", "weight": 1.0, "year": 2016}, {"source": "37", "target": "61", "source_name": "middle ages", "target_name": "progressive rock", "weight": 1.0, "year": 2016}, {"source": "37", "target": "69", "source_name": "middle ages", "target_name": "classical music", "weight": 1.0, "year": 2016}, {"source": "37", "target": "77", "source_name": "middle ages", "target_name": "rock music", "weight": 3.0, "year": 2016}, {"source": "37", "target": "80", "source_name": "middle ages", "target_name": "folk music", "weight": 2.0, "year": 2016}, {"source": "38", "target": "40", "source_name": "summary additional listening", "target_name": "musical instruments", "weight": 1.0, "year": 2016}, {"source": "38", "target": "52", "source_name": "summary additional listening", "target_name": "folk song", "weight": 1.0, "year": 2016}, {"source": "38", "target": "53", "source_name": "summary additional listening", "target_name": "popular music", "weight": 1.0, "year": 2016}, {"source": "38", "target": "54", "source_name": "summary additional listening", "target_name": "american popular music", "weight": 1.0, "year": 2016}, {"source": "38", "target": "65", "source_name": "summary additional listening", "target_name": "country music", "weight": 1.0, "year": 2016}, {"source": "38", "target": "69", "source_name": "summary additional listening", "target_name": "classical music", "weight": 1.0, "year": 2016}, {"source": "38", "target": "74", "source_name": "summary additional listening", "target_name": "united states", "weight": 1.0, "year": 2016}, {"source": "38", "target": "80", "source_name": "summary additional listening", "target_name": "folk music", "weight": 1.0, "year": 2016}, {"source": "38", "target": "89", "source_name": "summary additional listening", "target_name": "electronic music", "weight": 1.0, "year": 2016}, {"source": "40", "target": "43", "source_name": "musical instruments", "target_name": "music education", "weight": 1.0, "year": 2016}, {"source": "40", "target": "49", "source_name": "musical instruments", "target_name": "music theory", "weight": 1.0, "year": 2016}, {"source": "40", "target": "52", "source_name": "musical instruments", "target_name": "folk song", "weight": 1.0, "year": 2016}, {"source": "40", "target": "53", "source_name": "musical instruments", "target_name": "popular music", "weight": 2.0, "year": 2016}, {"source": "40", "target": "54", "source_name": "musical instruments", "target_name": "american popular music", "weight": 2.0, "year": 2016}, {"source": "40", "target": "65", "source_name": "musical instruments", "target_name": "country music", "weight": 1.0, "year": 2016}, {"source": "40", "target": "69", "source_name": "musical instruments", "target_name": "classical music", "weight": 1.0, "year": 2016}, {"source": "40", "target": "70", "source_name": "musical instruments", "target_name": "world war", "weight": 1.0, "year": 2016}, {"source": "40", "target": "74", "source_name": "musical instruments", "target_name": "united states", "weight": 2.0, "year": 2016}, {"source": "40", "target": "75", "source_name": "musical instruments", "target_name": "world war ii", "weight": 1.0, "year": 2016}, {"source": "40", "target": "80", "source_name": "musical instruments", "target_name": "folk music", "weight": 1.0, "year": 2016}, {"source": "40", "target": "89", "source_name": "musical instruments", "target_name": "electronic music", "weight": 2.0, "year": 2016}, {"source": "41", "target": "47", "source_name": "youth culture", "target_name": "hard rock", "weight": 1.0, "year": 2016}, {"source": "41", "target": "48", "source_name": "youth culture", "target_name": "pop music", "weight": 4.0, "year": 2016}, {"source": "41", "target": "51", "source_name": "youth culture", "target_name": "cultural identity", "weight": 2.0, "year": 2016}, {"source": "41", "target": "53", "source_name": "youth culture", "target_name": "popular music", "weight": 8.0, "year": 2016}, {"source": "41", "target": "57", "source_name": "youth culture", "target_name": "north america", "weight": 1.0, "year": 2016}, {"source": "41", "target": "60", "source_name": "youth culture", "target_name": "cultural studies", "weight": 2.0, "year": 2016}, {"source": "41", "target": "61", "source_name": "youth culture", "target_name": "progressive rock", "weight": 1.0, "year": 2016}, {"source": "41", "target": "66", "source_name": "youth culture", "target_name": "hong kong", "weight": 1.0, "year": 2016}, {"source": "41", "target": "74", "source_name": "youth culture", "target_name": "united states", "weight": 2.0, "year": 2016}, {"source": "41", "target": "75", "source_name": "youth culture", "target_name": "world war ii", "weight": 1.0, "year": 2016}, {"source": "41", "target": "77", "source_name": "youth culture", "target_name": "rock music", "weight": 9.0, "year": 2016}, {"source": "41", "target": "80", "source_name": "youth culture", "target_name": "folk music", "weight": 2.0, "year": 2016}, {"source": "42", "target": "47", "source_name": "simon frith", "target_name": "hard rock", "weight": 1.0, "year": 2016}, {"source": "42", "target": "48", "source_name": "simon frith", "target_name": "pop music", "weight": 6.0, "year": 2016}, {"source": "42", "target": "49", "source_name": "simon frith", "target_name": "music theory", "weight": 1.0, "year": 2016}, {"source": "42", "target": "51", "source_name": "simon frith", "target_name": "cultural identity", "weight": 1.0, "year": 2016}, {"source": "42", "target": "53", "source_name": "simon frith", "target_name": "popular music", "weight": 6.0, "year": 2016}, {"source": "42", "target": "55", "source_name": "simon frith", "target_name": "rock criticism", "weight": 2.0, "year": 2016}, {"source": "42", "target": "56", "source_name": "simon frith", "target_name": "bruce springsteen", "weight": 1.0, "year": 2016}, {"source": "42", "target": "57", "source_name": "simon frith", "target_name": "north america", "weight": 1.0, "year": 2016}, {"source": "42", "target": "60", "source_name": "simon frith", "target_name": "cultural studies", "weight": 3.0, "year": 2016}, {"source": "42", "target": "61", "source_name": "simon frith", "target_name": "progressive rock", "weight": 1.0, "year": 2016}, {"source": "42", "target": "65", "source_name": "simon frith", "target_name": "country music", "weight": 1.0, "year": 2016}, {"source": "42", "target": "72", "source_name": "simon frith", "target_name": "jimi hendrix", "weight": 1.0, "year": 2016}, {"source": "42", "target": "76", "source_name": "simon frith", "target_name": "los angeles", "weight": 1.0, "year": 2016}, {"source": "42", "target": "77", "source_name": "simon frith", "target_name": "rock music", "weight": 5.0, "year": 2016}, {"source": "42", "target": "78", "source_name": "simon frith", "target_name": "hip hop", "weight": 1.0, "year": 2016}, {"source": "42", "target": "79", "source_name": "simon frith", "target_name": "popular culture", "weight": 2.0, "year": 2016}, {"source": "42", "target": "82", "source_name": "simon frith", "target_name": "heavy metal", "weight": 1.0, "year": 2016}, {"source": "42", "target": "88", "source_name": "simon frith", "target_name": "oxford university press", "weight": 1.0, "year": 2016}, {"source": "43", "target": "48", "source_name": "music education", "target_name": "pop music", "weight": 2.0, "year": 2016}, {"source": "43", "target": "49", "source_name": "music education", "target_name": "music theory", "weight": 3.0, "year": 2016}, {"source": "43", "target": "52", "source_name": "music education", "target_name": "folk song", "weight": 1.0, "year": 2016}, {"source": "43", "target": "53", "source_name": "music education", "target_name": "popular music", "weight": 6.0, "year": 2016}, {"source": "43", "target": "57", "source_name": "music education", "target_name": "north america", "weight": 1.0, "year": 2016}, {"source": "43", "target": "60", "source_name": "music education", "target_name": "cultural studies", "weight": 1.0, "year": 2016}, {"source": "43", "target": "66", "source_name": "music education", "target_name": "hong kong", "weight": 1.0, "year": 2016}, {"source": "43", "target": "69", "source_name": "music education", "target_name": "classical music", "weight": 3.0, "year": 2016}, {"source": "43", "target": "74", "source_name": "music education", "target_name": "united states", "weight": 1.0, "year": 2016}, {"source": "43", "target": "77", "source_name": "music education", "target_name": "rock music", "weight": 5.0, "year": 2016}, {"source": "43", "target": "80", "source_name": "music education", "target_name": "folk music", "weight": 6.0, "year": 2016}, {"source": "43", "target": "82", "source_name": "music education", "target_name": "heavy metal", "weight": 1.0, "year": 2016}, {"source": "44", "target": "47", "source_name": "alternative rock", "target_name": "hard rock", "weight": 2.0, "year": 2016}, {"source": "44", "target": "48", "source_name": "alternative rock", "target_name": "pop music", "weight": 1.0, "year": 2016}, {"source": "44", "target": "51", "source_name": "alternative rock", "target_name": "cultural identity", "weight": 1.0, "year": 2016}, {"source": "44", "target": "53", "source_name": "alternative rock", "target_name": "popular music", "weight": 11.0, "year": 2016}, {"source": "44", "target": "57", "source_name": "alternative rock", "target_name": "north america", "weight": 3.0, "year": 2016}, {"source": "44", "target": "61", "source_name": "alternative rock", "target_name": "progressive rock", "weight": 1.0, "year": 2016}, {"source": "44", "target": "65", "source_name": "alternative rock", "target_name": "country music", "weight": 2.0, "year": 2016}, {"source": "44", "target": "67", "source_name": "alternative rock", "target_name": "rock art", "weight": 1.0, "year": 2016}, {"source": "44", "target": "73", "source_name": "alternative rock", "target_name": "southern rock", "weight": 1.0, "year": 2016}, {"source": "44", "target": "74", "source_name": "alternative rock", "target_name": "united states", "weight": 2.0, "year": 2016}, {"source": "44", "target": "77", "source_name": "alternative rock", "target_name": "rock music", "weight": 8.0, "year": 2016}, {"source": "44", "target": "78", "source_name": "alternative rock", "target_name": "hip hop", "weight": 1.0, "year": 2016}, {"source": "44", "target": "79", "source_name": "alternative rock", "target_name": "popular culture", "weight": 1.0, "year": 2016}, {"source": "44", "target": "80", "source_name": "alternative rock", "target_name": "folk music", "weight": 1.0, "year": 2016}, {"source": "44", "target": "82", "source_name": "alternative rock", "target_name": "heavy metal", "weight": 1.0, "year": 2016}, {"source": "45", "target": "77", "source_name": "double bass", "target_name": "rock music", "weight": 2.0, "year": 2016}, {"source": "46", "target": "48", "source_name": "music festival", "target_name": "pop music", "weight": 2.0, "year": 2016}, {"source": "46", "target": "53", "source_name": "music festival", "target_name": "popular music", "weight": 2.0, "year": 2016}, {"source": "46", "target": "61", "source_name": "music festival", "target_name": "progressive rock", "weight": 1.0, "year": 2016}, {"source": "46", "target": "66", "source_name": "music festival", "target_name": "hong kong", "weight": 1.0, "year": 2016}, {"source": "46", "target": "69", "source_name": "music festival", "target_name": "classical music", "weight": 3.0, "year": 2016}, {"source": "46", "target": "77", "source_name": "music festival", "target_name": "rock music", "weight": 5.0, "year": 2016}, {"source": "46", "target": "78", "source_name": "music festival", "target_name": "hip hop", "weight": 1.0, "year": 2016}, {"source": "46", "target": "80", "source_name": "music festival", "target_name": "folk music", "weight": 2.0, "year": 2016}, {"source": "46", "target": "85", "source_name": "music festival", "target_name": "jewish music", "weight": 1.0, "year": 2016}, {"source": "46", "target": "86", "source_name": "music festival", "target_name": "south korea", "weight": 2.0, "year": 2016}, {"source": "47", "target": "48", "source_name": "hard rock", "target_name": "pop music", "weight": 2.0, "year": 2016}, {"source": "47", "target": "51", "source_name": "hard rock", "target_name": "cultural identity", "weight": 1.0, "year": 2016}, {"source": "47", "target": "53", "source_name": "hard rock", "target_name": "popular music", "weight": 5.0, "year": 2016}, {"source": "47", "target": "56", "source_name": "hard rock", "target_name": "bruce springsteen", "weight": 1.0, "year": 2016}, {"source": "47", "target": "57", "source_name": "hard rock", "target_name": "north america", "weight": 1.0, "year": 2016}, {"source": "47", "target": "59", "source_name": "hard rock", "target_name": "college students", "weight": 1.0, "year": 2016}, {"source": "47", "target": "61", "source_name": "hard rock", "target_name": "progressive rock", "weight": 2.0, "year": 2016}, {"source": "47", "target": "65", "source_name": "hard rock", "target_name": "country music", "weight": 1.0, "year": 2016}, {"source": "47", "target": "69", "source_name": "hard rock", "target_name": "classical music", "weight": 2.0, "year": 2016}, {"source": "47", "target": "74", "source_name": "hard rock", "target_name": "united states", "weight": 1.0, "year": 2016}, {"source": "47", "target": "77", "source_name": "hard rock", "target_name": "rock music", "weight": 13.0, "year": 2016}, {"source": "47", "target": "78", "source_name": "hard rock", "target_name": "hip hop", "weight": 1.0, "year": 2016}, {"source": "47", "target": "79", "source_name": "hard rock", "target_name": "popular culture", "weight": 2.0, "year": 2016}, {"source": "47", "target": "82", "source_name": "hard rock", "target_name": "heavy metal", "weight": 8.0, "year": 2016}, {"source": "47", "target": "83", "source_name": "hard rock", "target_name": "folk rock", "weight": 1.0, "year": 2016}, {"source": "47", "target": "89", "source_name": "hard rock", "target_name": "electronic music", "weight": 1.0, "year": 2016}, {"source": "48", "target": "49", "source_name": "pop music", "target_name": "music theory", "weight": 1.0, "year": 2016}, {"source": "48", "target": "51", "source_name": "pop music", "target_name": "cultural identity", "weight": 3.0, "year": 2016}, {"source": "48", "target": "52", "source_name": "pop music", "target_name": "folk song", "weight": 2.0, "year": 2016}, {"source": "48", "target": "53", "source_name": "pop music", "target_name": "popular music", "weight": 42.0, "year": 2016}, {"source": "48", "target": "55", "source_name": "pop music", "target_name": "rock criticism", "weight": 2.0, "year": 2016}, {"source": "48", "target": "57", "source_name": "pop music", "target_name": "north america", "weight": 2.0, "year": 2016}, {"source": "48", "target": "59", "source_name": "pop music", "target_name": "college students", "weight": 3.0, "year": 2016}, {"source": "48", "target": "60", "source_name": "pop music", "target_name": "cultural studies", "weight": 1.0, "year": 2016}, {"source": "48", "target": "62", "source_name": "pop music", "target_name": "led zeppelin", "weight": 2.0, "year": 2016}, {"source": "48", "target": "64", "source_name": "pop music", "target_name": "english language", "weight": 2.0, "year": 2016}, {"source": "48", "target": "65", "source_name": "pop music", "target_name": "country music", "weight": 2.0, "year": 2016}, {"source": "48", "target": "66", "source_name": "pop music", "target_name": "hong kong", "weight": 4.0, "year": 2016}, {"source": "48", "target": "67", "source_name": "pop music", "target_name": "rock art", "weight": 3.0, "year": 2016}, {"source": "48", "target": "69", "source_name": "pop music", "target_name": "classical music", "weight": 8.0, "year": 2016}, {"source": "48", "target": "70", "source_name": "pop music", "target_name": "world war", "weight": 2.0, "year": 2016}, {"source": "48", "target": "71", "source_name": "pop music", "target_name": "latin american", "weight": 1.0, "year": 2016}, {"source": "48", "target": "72", "source_name": "pop music", "target_name": "jimi hendrix", "weight": 3.0, "year": 2016}, {"source": "48", "target": "74", "source_name": "pop music", "target_name": "united states", "weight": 4.0, "year": 2016}, {"source": "48", "target": "76", "source_name": "pop music", "target_name": "los angeles", "weight": 1.0, "year": 2016}, {"source": "48", "target": "77", "source_name": "pop music", "target_name": "rock music", "weight": 35.0, "year": 2016}, {"source": "48", "target": "78", "source_name": "pop music", "target_name": "hip hop", "weight": 4.0, "year": 2016}, {"source": "48", "target": "79", "source_name": "pop music", "target_name": "popular culture", "weight": 6.0, "year": 2016}, {"source": "48", "target": "80", "source_name": "pop music", "target_name": "folk music", "weight": 7.0, "year": 2016}, {"source": "48", "target": "82", "source_name": "pop music", "target_name": "heavy metal", "weight": 2.0, "year": 2016}, {"source": "48", "target": "83", "source_name": "pop music", "target_name": "folk rock", "weight": 2.0, "year": 2016}, {"source": "48", "target": "87", "source_name": "pop music", "target_name": "music hall", "weight": 1.0, "year": 2016}, {"source": "49", "target": "53", "source_name": "music theory", "target_name": "popular music", "weight": 5.0, "year": 2016}, {"source": "49", "target": "54", "source_name": "music theory", "target_name": "american popular music", "weight": 1.0, "year": 2016}, {"source": "49", "target": "55", "source_name": "music theory", "target_name": "rock criticism", "weight": 1.0, "year": 2016}, {"source": "49", "target": "57", "source_name": "music theory", "target_name": "north america", "weight": 2.0, "year": 2016}, {"source": "49", "target": "61", "source_name": "music theory", "target_name": "progressive rock", "weight": 1.0, "year": 2016}, {"source": "49", "target": "69", "source_name": "music theory", "target_name": "classical music", "weight": 1.0, "year": 2016}, {"source": "49", "target": "72", "source_name": "music theory", "target_name": "jimi hendrix", "weight": 1.0, "year": 2016}, {"source": "49", "target": "77", "source_name": "music theory", "target_name": "rock music", "weight": 4.0, "year": 2016}, {"source": "49", "target": "78", "source_name": "music theory", "target_name": "hip hop", "weight": 1.0, "year": 2016}, {"source": "49", "target": "88", "source_name": "music theory", "target_name": "oxford university press", "weight": 2.0, "year": 2016}, {"source": "49", "target": "89", "source_name": "music theory", "target_name": "electronic music", "weight": 1.0, "year": 2016}, {"source": "50", "target": "53", "source_name": "hollywood film", "target_name": "popular music", "weight": 1.0, "year": 2016}, {"source": "50", "target": "60", "source_name": "hollywood film", "target_name": "cultural studies", "weight": 1.0, "year": 2016}, {"source": "50", "target": "79", "source_name": "hollywood film", "target_name": "popular culture", "weight": 1.0, "year": 2016}, {"source": "50", "target": "81", "source_name": "hollywood film", "target_name": "avant garde", "weight": 1.0, "year": 2016}, {"source": "50", "target": "88", "source_name": "hollywood film", "target_name": "oxford university press", "weight": 1.0, "year": 2016}, {"source": "51", "target": "52", "source_name": "cultural identity", "target_name": "folk song", "weight": 1.0, "year": 2016}, {"source": "51", "target": "53", "source_name": "cultural identity", "target_name": "popular music", "weight": 3.0, "year": 2016}, {"source": "51", "target": "60", "source_name": "cultural identity", "target_name": "cultural studies", "weight": 2.0, "year": 2016}, {"source": "51", "target": "65", "source_name": "cultural identity", "target_name": "country music", "weight": 1.0, "year": 2016}, {"source": "51", "target": "66", "source_name": "cultural identity", "target_name": "hong kong", "weight": 1.0, "year": 2016}, {"source": "51", "target": "72", "source_name": "cultural identity", "target_name": "jimi hendrix", "weight": 2.0, "year": 2016}, {"source": "51", "target": "74", "source_name": "cultural identity", "target_name": "united states", "weight": 2.0, "year": 2016}, {"source": "51", "target": "77", "source_name": "cultural identity", "target_name": "rock music", "weight": 7.0, "year": 2016}, {"source": "51", "target": "79", "source_name": "cultural identity", "target_name": "popular culture", "weight": 2.0, "year": 2016}, {"source": "51", "target": "80", "source_name": "cultural identity", "target_name": "folk music", "weight": 1.0, "year": 2016}, {"source": "51", "target": "82", "source_name": "cultural identity", "target_name": "heavy metal", "weight": 1.0, "year": 2016}, {"source": "52", "target": "53", "source_name": "folk song", "target_name": "popular music", "weight": 10.0, "year": 2016}, {"source": "52", "target": "54", "source_name": "folk song", "target_name": "american popular music", "weight": 2.0, "year": 2016}, {"source": "52", "target": "65", "source_name": "folk song", "target_name": "country music", "weight": 2.0, "year": 2016}, {"source": "52", "target": "66", "source_name": "folk song", "target_name": "hong kong", "weight": 1.0, "year": 2016}, {"source": "52", "target": "69", "source_name": "folk song", "target_name": "classical music", "weight": 2.0, "year": 2016}, {"source": "52", "target": "74", "source_name": "folk song", "target_name": "united states", "weight": 1.0, "year": 2016}, {"source": "52", "target": "77", "source_name": "folk song", "target_name": "rock music", "weight": 4.0, "year": 2016}, {"source": "52", "target": "80", "source_name": "folk song", "target_name": "folk music", "weight": 9.0, "year": 2016}, {"source": "52", "target": "87", "source_name": "folk song", "target_name": "music hall", "weight": 1.0, "year": 2016}, {"source": "52", "target": "89", "source_name": "folk song", "target_name": "electronic music", "weight": 1.0, "year": 2016}, {"source": "53", "target": "54", "source_name": "popular music", "target_name": "american popular music", "weight": 18.0, "year": 2016}, {"source": "53", "target": "55", "source_name": "popular music", "target_name": "rock criticism", "weight": 6.0, "year": 2016}, {"source": "53", "target": "56", "source_name": "popular music", "target_name": "bruce springsteen", "weight": 2.0, "year": 2016}, {"source": "53", "target": "57", "source_name": "popular music", "target_name": "north america", "weight": 9.0, "year": 2016}, {"source": "53", "target": "58", "source_name": "popular music", "target_name": "music therapy", "weight": 1.0, "year": 2016}, {"source": "53", "target": "59", "source_name": "popular music", "target_name": "college students", "weight": 3.0, "year": 2016}, {"source": "53", "target": "60", "source_name": "popular music", "target_name": "cultural studies", "weight": 8.0, "year": 2016}, {"source": "53", "target": "61", "source_name": "popular music", "target_name": "progressive rock", "weight": 13.0, "year": 2016}, {"source": "53", "target": "62", "source_name": "popular music", "target_name": "led zeppelin", "weight": 3.0, "year": 2016}, {"source": "53", "target": "64", "source_name": "popular music", "target_name": "english language", "weight": 2.0, "year": 2016}, {"source": "53", "target": "65", "source_name": "popular music", "target_name": "country music", "weight": 11.0, "year": 2016}, {"source": "53", "target": "66", "source_name": "popular music", "target_name": "hong kong", "weight": 4.0, "year": 2016}, {"source": "53", "target": "67", "source_name": "popular music", "target_name": "rock art", "weight": 8.0, "year": 2016}, {"source": "53", "target": "69", "source_name": "popular music", "target_name": "classical music", "weight": 18.0, "year": 2016}, {"source": "53", "target": "70", "source_name": "popular music", "target_name": "world war", "weight": 6.0, "year": 2016}, {"source": "53", "target": "71", "source_name": "popular music", "target_name": "latin american", "weight": 3.0, "year": 2016}, {"source": "53", "target": "72", "source_name": "popular music", "target_name": "jimi hendrix", "weight": 5.0, "year": 2016}, {"source": "53", "target": "73", "source_name": "popular music", "target_name": "southern rock", "weight": 2.0, "year": 2016}, {"source": "53", "target": "74", "source_name": "popular music", "target_name": "united states", "weight": 22.0, "year": 2016}, {"source": "53", "target": "75", "source_name": "popular music", "target_name": "world war ii", "weight": 4.0, "year": 2016}, {"source": "53", "target": "76", "source_name": "popular music", "target_name": "los angeles", "weight": 6.0, "year": 2016}, {"source": "53", "target": "77", "source_name": "popular music", "target_name": "rock music", "weight": 143.0, "year": 2016}, {"source": "53", "target": "78", "source_name": "popular music", "target_name": "hip hop", "weight": 11.0, "year": 2016}, {"source": "53", "target": "79", "source_name": "popular music", "target_name": "popular culture", "weight": 27.0, "year": 2016}, {"source": "53", "target": "80", "source_name": "popular music", "target_name": "folk music", "weight": 21.0, "year": 2016}, {"source": "53", "target": "82", "source_name": "popular music", "target_name": "heavy metal", "weight": 15.0, "year": 2016}, {"source": "53", "target": "83", "source_name": "popular music", "target_name": "folk rock", "weight": 3.0, "year": 2016}, {"source": "53", "target": "85", "source_name": "popular music", "target_name": "jewish music", "weight": 2.0, "year": 2016}, {"source": "53", "target": "87", "source_name": "popular music", "target_name": "music hall", "weight": 5.0, "year": 2016}, {"source": "53", "target": "88", "source_name": "popular music", "target_name": "oxford university press", "weight": 4.0, "year": 2016}, {"source": "53", "target": "89", "source_name": "popular music", "target_name": "electronic music", "weight": 9.0, "year": 2016}, {"source": "53", "target": "90", "source_name": "popular music", "target_name": "blues rock", "weight": 1.0, "year": 2016}, {"source": "54", "target": "55", "source_name": "american popular music", "target_name": "rock criticism", "weight": 1.0, "year": 2016}, {"source": "54", "target": "57", "source_name": "american popular music", "target_name": "north america", "weight": 2.0, "year": 2016}, {"source": "54", "target": "65", "source_name": "american popular music", "target_name": "country music", "weight": 5.0, "year": 2016}, {"source": "54", "target": "69", "source_name": "american popular music", "target_name": "classical music", "weight": 3.0, "year": 2016}, {"source": "54", "target": "70", "source_name": "american popular music", "target_name": "world war", "weight": 1.0, "year": 2016}, {"source": "54", "target": "71", "source_name": "american popular music", "target_name": "latin american", "weight": 1.0, "year": 2016}, {"source": "54", "target": "74", "source_name": "american popular music", "target_name": "united states", "weight": 5.0, "year": 2016}, {"source": "54", "target": "75", "source_name": "american popular music", "target_name": "world war ii", "weight": 1.0, "year": 2016}, {"source": "54", "target": "76", "source_name": "american popular music", "target_name": "los angeles", "weight": 1.0, "year": 2016}, {"source": "54", "target": "77", "source_name": "american popular music", "target_name": "rock music", "weight": 7.0, "year": 2016}, {"source": "54", "target": "78", "source_name": "american popular music", "target_name": "hip hop", "weight": 2.0, "year": 2016}, {"source": "54", "target": "79", "source_name": "american popular music", "target_name": "popular culture", "weight": 1.0, "year": 2016}, {"source": "54", "target": "80", "source_name": "american popular music", "target_name": "folk music", "weight": 1.0, "year": 2016}, {"source": "54", "target": "88", "source_name": "american popular music", "target_name": "oxford university press", "weight": 1.0, "year": 2016}, {"source": "54", "target": "89", "source_name": "american popular music", "target_name": "electronic music", "weight": 1.0, "year": 2016}, {"source": "55", "target": "56", "source_name": "rock criticism", "target_name": "bruce springsteen", "weight": 1.0, "year": 2016}, {"source": "55", "target": "57", "source_name": "rock criticism", "target_name": "north america", "weight": 1.0, "year": 2016}, {"source": "55", "target": "61", "source_name": "rock criticism", "target_name": "progressive rock", "weight": 3.0, "year": 2016}, {"source": "55", "target": "62", "source_name": "rock criticism", "target_name": "led zeppelin", "weight": 1.0, "year": 2016}, {"source": "55", "target": "65", "source_name": "rock criticism", "target_name": "country music", "weight": 1.0, "year": 2016}, {"source": "55", "target": "69", "source_name": "rock criticism", "target_name": "classical music", "weight": 1.0, "year": 2016}, {"source": "55", "target": "74", "source_name": "rock criticism", "target_name": "united states", "weight": 2.0, "year": 2016}, {"source": "55", "target": "77", "source_name": "rock criticism", "target_name": "rock music", "weight": 5.0, "year": 2016}, {"source": "55", "target": "78", "source_name": "rock criticism", "target_name": "hip hop", "weight": 1.0, "year": 2016}, {"source": "55", "target": "79", "source_name": "rock criticism", "target_name": "popular culture", "weight": 1.0, "year": 2016}, {"source": "55", "target": "82", "source_name": "rock criticism", "target_name": "heavy metal", "weight": 1.0, "year": 2016}, {"source": "55", "target": "88", "source_name": "rock criticism", "target_name": "oxford university press", "weight": 1.0, "year": 2016}, {"source": "56", "target": "72", "source_name": "bruce springsteen", "target_name": "jimi hendrix", "weight": 1.0, "year": 2016}, {"source": "56", "target": "77", "source_name": "bruce springsteen", "target_name": "rock music", "weight": 2.0, "year": 2016}, {"source": "56", "target": "78", "source_name": "bruce springsteen", "target_name": "hip hop", "weight": 1.0, "year": 2016}, {"source": "56", "target": "79", "source_name": "bruce springsteen", "target_name": "popular culture", "weight": 2.0, "year": 2016}, {"source": "56", "target": "82", "source_name": "bruce springsteen", "target_name": "heavy metal", "weight": 1.0, "year": 2016}, {"source": "57", "target": "61", "source_name": "north america", "target_name": "progressive rock", "weight": 1.0, "year": 2016}, {"source": "57", "target": "65", "source_name": "north america", "target_name": "country music", "weight": 2.0, "year": 2016}, {"source": "57", "target": "71", "source_name": "north america", "target_name": "latin american", "weight": 1.0, "year": 2016}, {"source": "57", "target": "73", "source_name": "north america", "target_name": "southern rock", "weight": 1.0, "year": 2016}, {"source": "57", "target": "74", "source_name": "north america", "target_name": "united states", "weight": 3.0, "year": 2016}, {"source": "57", "target": "77", "source_name": "north america", "target_name": "rock music", "weight": 7.0, "year": 2016}, {"source": "57", "target": "78", "source_name": "north america", "target_name": "hip hop", "weight": 1.0, "year": 2016}, {"source": "57", "target": "80", "source_name": "north america", "target_name": "folk music", "weight": 2.0, "year": 2016}, {"source": "57", "target": "82", "source_name": "north america", "target_name": "heavy metal", "weight": 1.0, "year": 2016}, {"source": "58", "target": "64", "source_name": "music therapy", "target_name": "english language", "weight": 1.0, "year": 2016}, {"source": "58", "target": "74", "source_name": "music therapy", "target_name": "united states", "weight": 1.0, "year": 2016}, {"source": "58", "target": "77", "source_name": "music therapy", "target_name": "rock music", "weight": 3.0, "year": 2016}, {"source": "59", "target": "69", "source_name": "college students", "target_name": "classical music", "weight": 1.0, "year": 2016}, {"source": "59", "target": "74", "source_name": "college students", "target_name": "united states", "weight": 1.0, "year": 2016}, {"source": "59", "target": "77", "source_name": "college students", "target_name": "rock music", "weight": 5.0, "year": 2016}, {"source": "59", "target": "82", "source_name": "college students", "target_name": "heavy metal", "weight": 2.0, "year": 2016}, {"source": "60", "target": "61", "source_name": "cultural studies", "target_name": "progressive rock", "weight": 1.0, "year": 2016}, {"source": "60", "target": "62", "source_name": "cultural studies", "target_name": "led zeppelin", "weight": 1.0, "year": 2016}, {"source": "60", "target": "71", "source_name": "cultural studies", "target_name": "latin american", "weight": 1.0, "year": 2016}, {"source": "60", "target": "74", "source_name": "cultural studies", "target_name": "united states", "weight": 1.0, "year": 2016}, {"source": "60", "target": "76", "source_name": "cultural studies", "target_name": "los angeles", "weight": 1.0, "year": 2016}, {"source": "60", "target": "77", "source_name": "cultural studies", "target_name": "rock music", "weight": 8.0, "year": 2016}, {"source": "60", "target": "79", "source_name": "cultural studies", "target_name": "popular culture", "weight": 6.0, "year": 2016}, {"source": "60", "target": "80", "source_name": "cultural studies", "target_name": "folk music", "weight": 2.0, "year": 2016}, {"source": "60", "target": "81", "source_name": "cultural studies", "target_name": "avant garde", "weight": 1.0, "year": 2016}, {"source": "60", "target": "85", "source_name": "cultural studies", "target_name": "jewish music", "weight": 1.0, "year": 2016}, {"source": "60", "target": "87", "source_name": "cultural studies", "target_name": "music hall", "weight": 1.0, "year": 2016}, {"source": "60", "target": "88", "source_name": "cultural studies", "target_name": "oxford university press", "weight": 4.0, "year": 2016}, {"source": "60", "target": "89", "source_name": "cultural studies", "target_name": "electronic music", "weight": 1.0, "year": 2016}, {"source": "61", "target": "62", "source_name": "progressive rock", "target_name": "led zeppelin", "weight": 1.0, "year": 2016}, {"source": "61", "target": "69", "source_name": "progressive rock", "target_name": "classical music", "weight": 3.0, "year": 2016}, {"source": "61", "target": "72", "source_name": "progressive rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2016}, {"source": "61", "target": "74", "source_name": "progressive rock", "target_name": "united states", "weight": 3.0, "year": 2016}, {"source": "61", "target": "77", "source_name": "progressive rock", "target_name": "rock music", "weight": 24.0, "year": 2016}, {"source": "61", "target": "80", "source_name": "progressive rock", "target_name": "folk music", "weight": 3.0, "year": 2016}, {"source": "61", "target": "82", "source_name": "progressive rock", "target_name": "heavy metal", "weight": 3.0, "year": 2016}, {"source": "61", "target": "83", "source_name": "progressive rock", "target_name": "folk rock", "weight": 1.0, "year": 2016}, {"source": "61", "target": "88", "source_name": "progressive rock", "target_name": "oxford university press", "weight": 1.0, "year": 2016}, {"source": "61", "target": "89", "source_name": "progressive rock", "target_name": "electronic music", "weight": 1.0, "year": 2016}, {"source": "62", "target": "67", "source_name": "led zeppelin", "target_name": "rock art", "weight": 1.0, "year": 2016}, {"source": "62", "target": "69", "source_name": "led zeppelin", "target_name": "classical music", "weight": 1.0, "year": 2016}, {"source": "62", "target": "77", "source_name": "led zeppelin", "target_name": "rock music", "weight": 3.0, "year": 2016}, {"source": "62", "target": "78", "source_name": "led zeppelin", "target_name": "hip hop", "weight": 1.0, "year": 2016}, {"source": "62", "target": "80", "source_name": "led zeppelin", "target_name": "folk music", "weight": 1.0, "year": 2016}, {"source": "62", "target": "82", "source_name": "led zeppelin", "target_name": "heavy metal", "weight": 2.0, "year": 2016}, {"source": "62", "target": "88", "source_name": "led zeppelin", "target_name": "oxford university press", "weight": 1.0, "year": 2016}, {"source": "64", "target": "66", "source_name": "english language", "target_name": "hong kong", "weight": 1.0, "year": 2016}, {"source": "64", "target": "67", "source_name": "english language", "target_name": "rock art", "weight": 1.0, "year": 2016}, {"source": "64", "target": "70", "source_name": "english language", "target_name": "world war", "weight": 1.0, "year": 2016}, {"source": "64", "target": "74", "source_name": "english language", "target_name": "united states", "weight": 2.0, "year": 2016}, {"source": "64", "target": "77", "source_name": "english language", "target_name": "rock music", "weight": 2.0, "year": 2016}, {"source": "64", "target": "79", "source_name": "english language", "target_name": "popular culture", "weight": 1.0, "year": 2016}, {"source": "64", "target": "83", "source_name": "english language", "target_name": "folk rock", "weight": 1.0, "year": 2016}, {"source": "65", "target": "69", "source_name": "country music", "target_name": "classical music", "weight": 4.0, "year": 2016}, {"source": "65", "target": "72", "source_name": "country music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2016}, {"source": "65", "target": "73", "source_name": "country music", "target_name": "southern rock", "weight": 2.0, "year": 2016}, {"source": "65", "target": "74", "source_name": "country music", "target_name": "united states", "weight": 3.0, "year": 2016}, {"source": "65", "target": "77", "source_name": "country music", "target_name": "rock music", "weight": 5.0, "year": 2016}, {"source": "65", "target": "78", "source_name": "country music", "target_name": "hip hop", "weight": 1.0, "year": 2016}, {"source": "65", "target": "79", "source_name": "country music", "target_name": "popular culture", "weight": 2.0, "year": 2016}, {"source": "65", "target": "80", "source_name": "country music", "target_name": "folk music", "weight": 4.0, "year": 2016}, {"source": "65", "target": "82", "source_name": "country music", "target_name": "heavy metal", "weight": 1.0, "year": 2016}, {"source": "65", "target": "89", "source_name": "country music", "target_name": "electronic music", "weight": 2.0, "year": 2016}, {"source": "66", "target": "67", "source_name": "hong kong", "target_name": "rock art", "weight": 1.0, "year": 2016}, {"source": "66", "target": "77", "source_name": "hong kong", "target_name": "rock music", "weight": 2.0, "year": 2016}, {"source": "66", "target": "78", "source_name": "hong kong", "target_name": "hip hop", "weight": 1.0, "year": 2016}, {"source": "66", "target": "80", "source_name": "hong kong", "target_name": "folk music", "weight": 1.0, "year": 2016}, {"source": "66", "target": "83", "source_name": "hong kong", "target_name": "folk rock", "weight": 1.0, "year": 2016}, {"source": "66", "target": "85", "source_name": "hong kong", "target_name": "jewish music", "weight": 1.0, "year": 2016}, {"source": "67", "target": "69", "source_name": "rock art", "target_name": "classical music", "weight": 1.0, "year": 2016}, {"source": "67", "target": "74", "source_name": "rock art", "target_name": "united states", "weight": 1.0, "year": 2016}, {"source": "67", "target": "77", "source_name": "rock art", "target_name": "rock music", "weight": 8.0, "year": 2016}, {"source": "67", "target": "79", "source_name": "rock art", "target_name": "popular culture", "weight": 1.0, "year": 2016}, {"source": "67", "target": "80", "source_name": "rock art", "target_name": "folk music", "weight": 1.0, "year": 2016}, {"source": "67", "target": "82", "source_name": "rock art", "target_name": "heavy metal", "weight": 1.0, "year": 2016}, {"source": "67", "target": "83", "source_name": "rock art", "target_name": "folk rock", "weight": 1.0, "year": 2016}, {"source": "67", "target": "89", "source_name": "rock art", "target_name": "electronic music", "weight": 1.0, "year": 2016}, {"source": "68", "target": "69", "source_name": "hearing loss", "target_name": "classical music", "weight": 1.0, "year": 2016}, {"source": "68", "target": "77", "source_name": "hearing loss", "target_name": "rock music", "weight": 3.0, "year": 2016}, {"source": "69", "target": "70", "source_name": "classical music", "target_name": "world war", "weight": 2.0, "year": 2016}, {"source": "69", "target": "71", "source_name": "classical music", "target_name": "latin american", "weight": 1.0, "year": 2016}, {"source": "69", "target": "72", "source_name": "classical music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2016}, {"source": "69", "target": "74", "source_name": "classical music", "target_name": "united states", "weight": 4.0, "year": 2016}, {"source": "69", "target": "75", "source_name": "classical music", "target_name": "world war ii", "weight": 1.0, "year": 2016}, {"source": "69", "target": "76", "source_name": "classical music", "target_name": "los angeles", "weight": 1.0, "year": 2016}, {"source": "69", "target": "77", "source_name": "classical music", "target_name": "rock music", "weight": 39.0, "year": 2016}, {"source": "69", "target": "78", "source_name": "classical music", "target_name": "hip hop", "weight": 2.0, "year": 2016}, {"source": "69", "target": "79", "source_name": "classical music", "target_name": "popular culture", "weight": 4.0, "year": 2016}, {"source": "69", "target": "80", "source_name": "classical music", "target_name": "folk music", "weight": 5.0, "year": 2016}, {"source": "69", "target": "82", "source_name": "classical music", "target_name": "heavy metal", "weight": 3.0, "year": 2016}, {"source": "69", "target": "87", "source_name": "classical music", "target_name": "music hall", "weight": 2.0, "year": 2016}, {"source": "69", "target": "88", "source_name": "classical music", "target_name": "oxford university press", "weight": 1.0, "year": 2016}, {"source": "69", "target": "89", "source_name": "classical music", "target_name": "electronic music", "weight": 2.0, "year": 2016}, {"source": "70", "target": "74", "source_name": "world war", "target_name": "united states", "weight": 2.0, "year": 2016}, {"source": "70", "target": "75", "source_name": "world war", "target_name": "world war ii", "weight": 6.0, "year": 2016}, {"source": "70", "target": "77", "source_name": "world war", "target_name": "rock music", "weight": 6.0, "year": 2016}, {"source": "70", "target": "79", "source_name": "world war", "target_name": "popular culture", "weight": 1.0, "year": 2016}, {"source": "70", "target": "80", "source_name": "world war", "target_name": "folk music", "weight": 1.0, "year": 2016}, {"source": "70", "target": "87", "source_name": "world war", "target_name": "music hall", "weight": 1.0, "year": 2016}, {"source": "70", "target": "89", "source_name": "world war", "target_name": "electronic music", "weight": 1.0, "year": 2016}, {"source": "71", "target": "74", "source_name": "latin american", "target_name": "united states", "weight": 4.0, "year": 2016}, {"source": "71", "target": "76", "source_name": "latin american", "target_name": "los angeles", "weight": 2.0, "year": 2016}, {"source": "71", "target": "77", "source_name": "latin american", "target_name": "rock music", "weight": 5.0, "year": 2016}, {"source": "71", "target": "79", "source_name": "latin american", "target_name": "popular culture", "weight": 1.0, "year": 2016}, {"source": "72", "target": "74", "source_name": "jimi hendrix", "target_name": "united states", "weight": 1.0, "year": 2016}, {"source": "72", "target": "77", "source_name": "jimi hendrix", "target_name": "rock music", "weight": 7.0, "year": 2016}, {"source": "72", "target": "79", "source_name": "jimi hendrix", "target_name": "popular culture", "weight": 2.0, "year": 2016}, {"source": "72", "target": "80", "source_name": "jimi hendrix", "target_name": "folk music", "weight": 1.0, "year": 2016}, {"source": "72", "target": "89", "source_name": "jimi hendrix", "target_name": "electronic music", "weight": 1.0, "year": 2016}, {"source": "73", "target": "77", "source_name": "southern rock", "target_name": "rock music", "weight": 1.0, "year": 2016}, {"source": "73", "target": "80", "source_name": "southern rock", "target_name": "folk music", "weight": 1.0, "year": 2016}, {"source": "74", "target": "76", "source_name": "united states", "target_name": "los angeles", "weight": 1.0, "year": 2016}, {"source": "74", "target": "77", "source_name": "united states", "target_name": "rock music", "weight": 16.0, "year": 2016}, {"source": "74", "target": "78", "source_name": "united states", "target_name": "hip hop", "weight": 1.0, "year": 2016}, {"source": "74", "target": "79", "source_name": "united states", "target_name": "popular culture", "weight": 3.0, "year": 2016}, {"source": "74", "target": "80", "source_name": "united states", "target_name": "folk music", "weight": 4.0, "year": 2016}, {"source": "74", "target": "88", "source_name": "united states", "target_name": "oxford university press", "weight": 1.0, "year": 2016}, {"source": "74", "target": "89", "source_name": "united states", "target_name": "electronic music", "weight": 3.0, "year": 2016}, {"source": "75", "target": "76", "source_name": "world war ii", "target_name": "los angeles", "weight": 1.0, "year": 2016}, {"source": "75", "target": "77", "source_name": "world war ii", "target_name": "rock music", "weight": 3.0, "year": 2016}, {"source": "75", "target": "80", "source_name": "world war ii", "target_name": "folk music", "weight": 1.0, "year": 2016}, {"source": "76", "target": "77", "source_name": "los angeles", "target_name": "rock music", "weight": 8.0, "year": 2016}, {"source": "76", "target": "79", "source_name": "los angeles", "target_name": "popular culture", "weight": 1.0, "year": 2016}, {"source": "76", "target": "80", "source_name": "los angeles", "target_name": "folk music", "weight": 2.0, "year": 2016}, {"source": "77", "target": "78", "source_name": "rock music", "target_name": "hip hop", "weight": 5.0, "year": 2016}, {"source": "77", "target": "79", "source_name": "rock music", "target_name": "popular culture", "weight": 22.0, "year": 2016}, {"source": "77", "target": "80", "source_name": "rock music", "target_name": "folk music", "weight": 15.0, "year": 2016}, {"source": "77", "target": "82", "source_name": "rock music", "target_name": "heavy metal", "weight": 17.0, "year": 2016}, {"source": "77", "target": "83", "source_name": "rock music", "target_name": "folk rock", "weight": 3.0, "year": 2016}, {"source": "77", "target": "87", "source_name": "rock music", "target_name": "music hall", "weight": 5.0, "year": 2016}, {"source": "77", "target": "88", "source_name": "rock music", "target_name": "oxford university press", "weight": 2.0, "year": 2016}, {"source": "77", "target": "89", "source_name": "rock music", "target_name": "electronic music", "weight": 6.0, "year": 2016}, {"source": "78", "target": "79", "source_name": "hip hop", "target_name": "popular culture", "weight": 2.0, "year": 2016}, {"source": "78", "target": "80", "source_name": "hip hop", "target_name": "folk music", "weight": 3.0, "year": 2016}, {"source": "78", "target": "82", "source_name": "hip hop", "target_name": "heavy metal", "weight": 2.0, "year": 2016}, {"source": "78", "target": "85", "source_name": "hip hop", "target_name": "jewish music", "weight": 1.0, "year": 2016}, {"source": "78", "target": "88", "source_name": "hip hop", "target_name": "oxford university press", "weight": 1.0, "year": 2016}, {"source": "78", "target": "90", "source_name": "hip hop", "target_name": "blues rock", "weight": 1.0, "year": 2016}, {"source": "79", "target": "80", "source_name": "popular culture", "target_name": "folk music", "weight": 3.0, "year": 2016}, {"source": "79", "target": "82", "source_name": "popular culture", "target_name": "heavy metal", "weight": 3.0, "year": 2016}, {"source": "79", "target": "85", "source_name": "popular culture", "target_name": "jewish music", "weight": 1.0, "year": 2016}, {"source": "79", "target": "87", "source_name": "popular culture", "target_name": "music hall", "weight": 3.0, "year": 2016}, {"source": "79", "target": "88", "source_name": "popular culture", "target_name": "oxford university press", "weight": 1.0, "year": 2016}, {"source": "79", "target": "89", "source_name": "popular culture", "target_name": "electronic music", "weight": 1.0, "year": 2016}, {"source": "80", "target": "82", "source_name": "folk music", "target_name": "heavy metal", "weight": 1.0, "year": 2016}, {"source": "80", "target": "85", "source_name": "folk music", "target_name": "jewish music", "weight": 2.0, "year": 2016}, {"source": "80", "target": "87", "source_name": "folk music", "target_name": "music hall", "weight": 3.0, "year": 2016}, {"source": "80", "target": "88", "source_name": "folk music", "target_name": "oxford university press", "weight": 1.0, "year": 2016}, {"source": "80", "target": "89", "source_name": "folk music", "target_name": "electronic music", "weight": 3.0, "year": 2016}, {"source": "81", "target": "88", "source_name": "avant garde", "target_name": "oxford university press", "weight": 1.0, "year": 2016}, {"source": "82", "target": "83", "source_name": "heavy metal", "target_name": "folk rock", "weight": 2.0, "year": 2016}, {"source": "85", "target": "88", "source_name": "jewish music", "target_name": "oxford university press", "weight": 1.0, "year": 2016}, {"source": "88", "target": "89", "source_name": "oxford university press", "target_name": "electronic music", "weight": 1.0, "year": 2016}]}, {"2017": [{"source": "1", "target": "6", "source_name": "rock star", "target_name": "elvis presley", "weight": 1.0, "year": 2017}, {"source": "1", "target": "7", "source_name": "rock star", "target_name": "nineteenth century", "weight": 1.0, "year": 2017}, {"source": "1", "target": "9", "source_name": "rock star", "target_name": "compact disc", "weight": 1.0, "year": 2017}, {"source": "1", "target": "16", "source_name": "rock star", "target_name": "bob dylan", "weight": 1.0, "year": 2017}, {"source": "1", "target": "19", "source_name": "rock star", "target_name": "music video", "weight": 1.0, "year": 2017}, {"source": "1", "target": "23", "source_name": "rock star", "target_name": "electronic dance music", "weight": 1.0, "year": 2017}, {"source": "1", "target": "24", "source_name": "rock star", "target_name": "punk rock", "weight": 1.0, "year": 2017}, {"source": "1", "target": "28", "source_name": "rock star", "target_name": "high school", "weight": 1.0, "year": 2017}, {"source": "1", "target": "29", "source_name": "rock star", "target_name": "rolling stone", "weight": 2.0, "year": 2017}, {"source": "1", "target": "36", "source_name": "rock star", "target_name": "music industry", "weight": 4.0, "year": 2017}, {"source": "1", "target": "41", "source_name": "rock star", "target_name": "youth culture", "weight": 2.0, "year": 2017}, {"source": "1", "target": "42", "source_name": "rock star", "target_name": "simon frith", "weight": 1.0, "year": 2017}, {"source": "1", "target": "48", "source_name": "rock star", "target_name": "pop music", "weight": 4.0, "year": 2017}, {"source": "1", "target": "51", "source_name": "rock star", "target_name": "cultural identity", "weight": 2.0, "year": 2017}, {"source": "1", "target": "53", "source_name": "rock star", "target_name": "popular music", "weight": 7.0, "year": 2017}, {"source": "1", "target": "56", "source_name": "rock star", "target_name": "bruce springsteen", "weight": 1.0, "year": 2017}, {"source": "1", "target": "57", "source_name": "rock star", "target_name": "north america", "weight": 1.0, "year": 2017}, {"source": "1", "target": "60", "source_name": "rock star", "target_name": "cultural studies", "weight": 1.0, "year": 2017}, {"source": "1", "target": "69", "source_name": "rock star", "target_name": "classical music", "weight": 1.0, "year": 2017}, {"source": "1", "target": "74", "source_name": "rock star", "target_name": "united states", "weight": 1.0, "year": 2017}, {"source": "1", "target": "77", "source_name": "rock star", "target_name": "rock music", "weight": 10.0, "year": 2017}, {"source": "1", "target": "79", "source_name": "rock star", "target_name": "popular culture", "weight": 2.0, "year": 2017}, {"source": "1", "target": "82", "source_name": "rock star", "target_name": "heavy metal", "weight": 3.0, "year": 2017}, {"source": "2", "target": "3", "source_name": "indie rock", "target_name": "glam rock", "weight": 1.0, "year": 2017}, {"source": "2", "target": "19", "source_name": "indie rock", "target_name": "music video", "weight": 1.0, "year": 2017}, {"source": "2", "target": "20", "source_name": "indie rock", "target_name": "garage rock", "weight": 1.0, "year": 2017}, {"source": "2", "target": "24", "source_name": "indie rock", "target_name": "punk rock", "weight": 1.0, "year": 2017}, {"source": "2", "target": "27", "source_name": "indie rock", "target_name": "pop rock", "weight": 1.0, "year": 2017}, {"source": "2", "target": "30", "source_name": "indie rock", "target_name": "rock band", "weight": 2.0, "year": 2017}, {"source": "2", "target": "36", "source_name": "indie rock", "target_name": "music industry", "weight": 1.0, "year": 2017}, {"source": "2", "target": "44", "source_name": "indie rock", "target_name": "alternative rock", "weight": 1.0, "year": 2017}, {"source": "2", "target": "47", "source_name": "indie rock", "target_name": "hard rock", "weight": 1.0, "year": 2017}, {"source": "2", "target": "48", "source_name": "indie rock", "target_name": "pop music", "weight": 2.0, "year": 2017}, {"source": "2", "target": "51", "source_name": "indie rock", "target_name": "cultural identity", "weight": 1.0, "year": 2017}, {"source": "2", "target": "53", "source_name": "indie rock", "target_name": "popular music", "weight": 2.0, "year": 2017}, {"source": "2", "target": "67", "source_name": "indie rock", "target_name": "rock art", "weight": 2.0, "year": 2017}, {"source": "2", "target": "69", "source_name": "indie rock", "target_name": "classical music", "weight": 1.0, "year": 2017}, {"source": "2", "target": "72", "source_name": "indie rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2017}, {"source": "2", "target": "74", "source_name": "indie rock", "target_name": "united states", "weight": 1.0, "year": 2017}, {"source": "2", "target": "77", "source_name": "indie rock", "target_name": "rock music", "weight": 6.0, "year": 2017}, {"source": "2", "target": "78", "source_name": "indie rock", "target_name": "hip hop", "weight": 1.0, "year": 2017}, {"source": "2", "target": "80", "source_name": "indie rock", "target_name": "folk music", "weight": 1.0, "year": 2017}, {"source": "3", "target": "20", "source_name": "glam rock", "target_name": "garage rock", "weight": 2.0, "year": 2017}, {"source": "3", "target": "24", "source_name": "glam rock", "target_name": "punk rock", "weight": 2.0, "year": 2017}, {"source": "3", "target": "27", "source_name": "glam rock", "target_name": "pop rock", "weight": 1.0, "year": 2017}, {"source": "3", "target": "41", "source_name": "glam rock", "target_name": "youth culture", "weight": 1.0, "year": 2017}, {"source": "3", "target": "44", "source_name": "glam rock", "target_name": "alternative rock", "weight": 1.0, "year": 2017}, {"source": "3", "target": "47", "source_name": "glam rock", "target_name": "hard rock", "weight": 1.0, "year": 2017}, {"source": "3", "target": "53", "source_name": "glam rock", "target_name": "popular music", "weight": 1.0, "year": 2017}, {"source": "3", "target": "77", "source_name": "glam rock", "target_name": "rock music", "weight": 3.0, "year": 2017}, {"source": "3", "target": "79", "source_name": "glam rock", "target_name": "popular culture", "weight": 2.0, "year": 2017}, {"source": "3", "target": "87", "source_name": "glam rock", "target_name": "music hall", "weight": 1.0, "year": 2017}, {"source": "4", "target": "7", "source_name": "gregorian chant", "target_name": "nineteenth century", "weight": 1.0, "year": 2017}, {"source": "4", "target": "9", "source_name": "gregorian chant", "target_name": "compact disc", "weight": 1.0, "year": 2017}, {"source": "4", "target": "10", "source_name": "gregorian chant", "target_name": "african american", "weight": 1.0, "year": 2017}, {"source": "4", "target": "19", "source_name": "gregorian chant", "target_name": "music video", "weight": 1.0, "year": 2017}, {"source": "4", "target": "22", "source_name": "gregorian chant", "target_name": "chamber music", "weight": 1.0, "year": 2017}, {"source": "4", "target": "36", "source_name": "gregorian chant", "target_name": "music industry", "weight": 1.0, "year": 2017}, {"source": "4", "target": "37", "source_name": "gregorian chant", "target_name": "middle ages", "weight": 1.0, "year": 2017}, {"source": "4", "target": "38", "source_name": "gregorian chant", "target_name": "summary additional listening", "weight": 1.0, "year": 2017}, {"source": "4", "target": "40", "source_name": "gregorian chant", "target_name": "musical instruments", "weight": 1.0, "year": 2017}, {"source": "4", "target": "48", "source_name": "gregorian chant", "target_name": "pop music", "weight": 1.0, "year": 2017}, {"source": "4", "target": "52", "source_name": "gregorian chant", "target_name": "folk song", "weight": 1.0, "year": 2017}, {"source": "4", "target": "53", "source_name": "gregorian chant", "target_name": "popular music", "weight": 1.0, "year": 2017}, {"source": "4", "target": "54", "source_name": "gregorian chant", "target_name": "american popular music", "weight": 1.0, "year": 2017}, {"source": "4", "target": "65", "source_name": "gregorian chant", "target_name": "country music", "weight": 1.0, "year": 2017}, {"source": "4", "target": "69", "source_name": "gregorian chant", "target_name": "classical music", "weight": 1.0, "year": 2017}, {"source": "4", "target": "74", "source_name": "gregorian chant", "target_name": "united states", "weight": 1.0, "year": 2017}, {"source": "4", "target": "80", "source_name": "gregorian chant", "target_name": "folk music", "weight": 1.0, "year": 2017}, {"source": "4", "target": "89", "source_name": "gregorian chant", "target_name": "electronic music", "weight": 1.0, "year": 2017}, {"source": "5", "target": "12", "source_name": "jesus christ superstar", "target_name": "rock opera", "weight": 3.0, "year": 2017}, {"source": "5", "target": "15", "source_name": "jesus christ superstar", "target_name": "musical theatre", "weight": 3.0, "year": 2017}, {"source": "5", "target": "33", "source_name": "jesus christ superstar", "target_name": "jesus christ", "weight": 5.0, "year": 2017}, {"source": "5", "target": "34", "source_name": "jesus christ superstar", "target_name": "mass media", "weight": 1.0, "year": 2017}, {"source": "5", "target": "41", "source_name": "jesus christ superstar", "target_name": "youth culture", "weight": 1.0, "year": 2017}, {"source": "5", "target": "53", "source_name": "jesus christ superstar", "target_name": "popular music", "weight": 1.0, "year": 2017}, {"source": "5", "target": "77", "source_name": "jesus christ superstar", "target_name": "rock music", "weight": 7.0, "year": 2017}, {"source": "6", "target": "10", "source_name": "elvis presley", "target_name": "african american", "weight": 1.0, "year": 2017}, {"source": "6", "target": "16", "source_name": "elvis presley", "target_name": "bob dylan", "weight": 4.0, "year": 2017}, {"source": "6", "target": "17", "source_name": "elvis presley", "target_name": "civil rights", "weight": 1.0, "year": 2017}, {"source": "6", "target": "23", "source_name": "elvis presley", "target_name": "electronic dance music", "weight": 1.0, "year": 2017}, {"source": "6", "target": "29", "source_name": "elvis presley", "target_name": "rolling stone", "weight": 2.0, "year": 2017}, {"source": "6", "target": "36", "source_name": "elvis presley", "target_name": "music industry", "weight": 3.0, "year": 2017}, {"source": "6", "target": "40", "source_name": "elvis presley", "target_name": "musical instruments", "weight": 1.0, "year": 2017}, {"source": "6", "target": "41", "source_name": "elvis presley", "target_name": "youth culture", "weight": 1.0, "year": 2017}, {"source": "6", "target": "42", "source_name": "elvis presley", "target_name": "simon frith", "weight": 2.0, "year": 2017}, {"source": "6", "target": "47", "source_name": "elvis presley", "target_name": "hard rock", "weight": 1.0, "year": 2017}, {"source": "6", "target": "48", "source_name": "elvis presley", "target_name": "pop music", "weight": 1.0, "year": 2017}, {"source": "6", "target": "49", "source_name": "elvis presley", "target_name": "music theory", "weight": 1.0, "year": 2017}, {"source": "6", "target": "51", "source_name": "elvis presley", "target_name": "cultural identity", "weight": 1.0, "year": 2017}, {"source": "6", "target": "53", "source_name": "elvis presley", "target_name": "popular music", "weight": 9.0, "year": 2017}, {"source": "6", "target": "54", "source_name": "elvis presley", "target_name": "american popular music", "weight": 3.0, "year": 2017}, {"source": "6", "target": "56", "source_name": "elvis presley", "target_name": "bruce springsteen", "weight": 2.0, "year": 2017}, {"source": "6", "target": "60", "source_name": "elvis presley", "target_name": "cultural studies", "weight": 1.0, "year": 2017}, {"source": "6", "target": "67", "source_name": "elvis presley", "target_name": "rock art", "weight": 1.0, "year": 2017}, {"source": "6", "target": "70", "source_name": "elvis presley", "target_name": "world war", "weight": 1.0, "year": 2017}, {"source": "6", "target": "72", "source_name": "elvis presley", "target_name": "jimi hendrix", "weight": 1.0, "year": 2017}, {"source": "6", "target": "74", "source_name": "elvis presley", "target_name": "united states", "weight": 2.0, "year": 2017}, {"source": "6", "target": "75", "source_name": "elvis presley", "target_name": "world war ii", "weight": 1.0, "year": 2017}, {"source": "6", "target": "77", "source_name": "elvis presley", "target_name": "rock music", "weight": 5.0, "year": 2017}, {"source": "6", "target": "78", "source_name": "elvis presley", "target_name": "hip hop", "weight": 1.0, "year": 2017}, {"source": "6", "target": "79", "source_name": "elvis presley", "target_name": "popular culture", "weight": 2.0, "year": 2017}, {"source": "6", "target": "80", "source_name": "elvis presley", "target_name": "folk music", "weight": 1.0, "year": 2017}, {"source": "6", "target": "82", "source_name": "elvis presley", "target_name": "heavy metal", "weight": 1.0, "year": 2017}, {"source": "7", "target": "9", "source_name": "nineteenth century", "target_name": "compact disc", "weight": 1.0, "year": 2017}, {"source": "7", "target": "10", "source_name": "nineteenth century", "target_name": "african american", "weight": 1.0, "year": 2017}, {"source": "7", "target": "19", "source_name": "nineteenth century", "target_name": "music video", "weight": 1.0, "year": 2017}, {"source": "7", "target": "22", "source_name": "nineteenth century", "target_name": "chamber music", "weight": 1.0, "year": 2017}, {"source": "7", "target": "34", "source_name": "nineteenth century", "target_name": "mass media", "weight": 1.0, "year": 2017}, {"source": "7", "target": "36", "source_name": "nineteenth century", "target_name": "music industry", "weight": 2.0, "year": 2017}, {"source": "7", "target": "38", "source_name": "nineteenth century", "target_name": "summary additional listening", "weight": 1.0, "year": 2017}, {"source": "7", "target": "40", "source_name": "nineteenth century", "target_name": "musical instruments", "weight": 1.0, "year": 2017}, {"source": "7", "target": "43", "source_name": "nineteenth century", "target_name": "music education", "weight": 1.0, "year": 2017}, {"source": "7", "target": "45", "source_name": "nineteenth century", "target_name": "double bass", "weight": 2.0, "year": 2017}, {"source": "7", "target": "48", "source_name": "nineteenth century", "target_name": "pop music", "weight": 1.0, "year": 2017}, {"source": "7", "target": "50", "source_name": "nineteenth century", "target_name": "hollywood film", "weight": 1.0, "year": 2017}, {"source": "7", "target": "52", "source_name": "nineteenth century", "target_name": "folk song", "weight": 3.0, "year": 2017}, {"source": "7", "target": "53", "source_name": "nineteenth century", "target_name": "popular music", "weight": 4.0, "year": 2017}, {"source": "7", "target": "54", "source_name": "nineteenth century", "target_name": "american popular music", "weight": 1.0, "year": 2017}, {"source": "7", "target": "65", "source_name": "nineteenth century", "target_name": "country music", "weight": 1.0, "year": 2017}, {"source": "7", "target": "67", "source_name": "nineteenth century", "target_name": "rock art", "weight": 1.0, "year": 2017}, {"source": "7", "target": "69", "source_name": "nineteenth century", "target_name": "classical music", "weight": 4.0, "year": 2017}, {"source": "7", "target": "70", "source_name": "nineteenth century", "target_name": "world war", "weight": 2.0, "year": 2017}, {"source": "7", "target": "74", "source_name": "nineteenth century", "target_name": "united states", "weight": 2.0, "year": 2017}, {"source": "7", "target": "77", "source_name": "nineteenth century", "target_name": "rock music", "weight": 4.0, "year": 2017}, {"source": "7", "target": "79", "source_name": "nineteenth century", "target_name": "popular culture", "weight": 1.0, "year": 2017}, {"source": "7", "target": "80", "source_name": "nineteenth century", "target_name": "folk music", "weight": 3.0, "year": 2017}, {"source": "7", "target": "85", "source_name": "nineteenth century", "target_name": "jewish music", "weight": 1.0, "year": 2017}, {"source": "7", "target": "87", "source_name": "nineteenth century", "target_name": "music hall", "weight": 1.0, "year": 2017}, {"source": "7", "target": "89", "source_name": "nineteenth century", "target_name": "electronic music", "weight": 1.0, "year": 2017}, {"source": "8", "target": "20", "source_name": "christian rock", "target_name": "garage rock", "weight": 1.0, "year": 2017}, {"source": "8", "target": "36", "source_name": "christian rock", "target_name": "music industry", "weight": 1.0, "year": 2017}, {"source": "8", "target": "44", "source_name": "christian rock", "target_name": "alternative rock", "weight": 1.0, "year": 2017}, {"source": "8", "target": "53", "source_name": "christian rock", "target_name": "popular music", "weight": 2.0, "year": 2017}, {"source": "8", "target": "57", "source_name": "christian rock", "target_name": "north america", "weight": 1.0, "year": 2017}, {"source": "8", "target": "65", "source_name": "christian rock", "target_name": "country music", "weight": 1.0, "year": 2017}, {"source": "8", "target": "73", "source_name": "christian rock", "target_name": "southern rock", "weight": 1.0, "year": 2017}, {"source": "8", "target": "77", "source_name": "christian rock", "target_name": "rock music", "weight": 2.0, "year": 2017}, {"source": "8", "target": "79", "source_name": "christian rock", "target_name": "popular culture", "weight": 1.0, "year": 2017}, {"source": "8", "target": "80", "source_name": "christian rock", "target_name": "folk music", "weight": 1.0, "year": 2017}, {"source": "9", "target": "10", "source_name": "compact disc", "target_name": "african american", "weight": 1.0, "year": 2017}, {"source": "9", "target": "11", "source_name": "compact disc", "target_name": "south africa", "weight": 1.0, "year": 2017}, {"source": "9", "target": "18", "source_name": "compact disc", "target_name": "middle class", "weight": 1.0, "year": 2017}, {"source": "9", "target": "19", "source_name": "compact disc", "target_name": "music video", "weight": 1.0, "year": 2017}, {"source": "9", "target": "24", "source_name": "compact disc", "target_name": "punk rock", "weight": 1.0, "year": 2017}, {"source": "9", "target": "25", "source_name": "compact disc", "target_name": "russian rock", "weight": 1.0, "year": 2017}, {"source": "9", "target": "28", "source_name": "compact disc", "target_name": "high school", "weight": 1.0, "year": 2017}, {"source": "9", "target": "29", "source_name": "compact disc", "target_name": "rolling stone", "weight": 1.0, "year": 2017}, {"source": "9", "target": "30", "source_name": "compact disc", "target_name": "rock band", "weight": 1.0, "year": 2017}, {"source": "9", "target": "36", "source_name": "compact disc", "target_name": "music industry", "weight": 1.0, "year": 2017}, {"source": "9", "target": "37", "source_name": "compact disc", "target_name": "middle ages", "weight": 1.0, "year": 2017}, {"source": "9", "target": "46", "source_name": "compact disc", "target_name": "music festival", "weight": 1.0, "year": 2017}, {"source": "9", "target": "48", "source_name": "compact disc", "target_name": "pop music", "weight": 1.0, "year": 2017}, {"source": "9", "target": "51", "source_name": "compact disc", "target_name": "cultural identity", "weight": 1.0, "year": 2017}, {"source": "9", "target": "53", "source_name": "compact disc", "target_name": "popular music", "weight": 4.0, "year": 2017}, {"source": "9", "target": "61", "source_name": "compact disc", "target_name": "progressive rock", "weight": 1.0, "year": 2017}, {"source": "9", "target": "66", "source_name": "compact disc", "target_name": "hong kong", "weight": 1.0, "year": 2017}, {"source": "9", "target": "74", "source_name": "compact disc", "target_name": "united states", "weight": 1.0, "year": 2017}, {"source": "9", "target": "77", "source_name": "compact disc", "target_name": "rock music", "weight": 2.0, "year": 2017}, {"source": "9", "target": "78", "source_name": "compact disc", "target_name": "hip hop", "weight": 1.0, "year": 2017}, {"source": "9", "target": "79", "source_name": "compact disc", "target_name": "popular culture", "weight": 1.0, "year": 2017}, {"source": "9", "target": "80", "source_name": "compact disc", "target_name": "folk music", "weight": 3.0, "year": 2017}, {"source": "9", "target": "85", "source_name": "compact disc", "target_name": "jewish music", "weight": 2.0, "year": 2017}, {"source": "9", "target": "89", "source_name": "compact disc", "target_name": "electronic music", "weight": 1.0, "year": 2017}, {"source": "10", "target": "11", "source_name": "african american", "target_name": "south africa", "weight": 1.0, "year": 2017}, {"source": "10", "target": "15", "source_name": "african american", "target_name": "musical theatre", "weight": 1.0, "year": 2017}, {"source": "10", "target": "17", "source_name": "african american", "target_name": "civil rights", "weight": 2.0, "year": 2017}, {"source": "10", "target": "19", "source_name": "african american", "target_name": "music video", "weight": 1.0, "year": 2017}, {"source": "10", "target": "21", "source_name": "african american", "target_name": "social protest", "weight": 1.0, "year": 2017}, {"source": "10", "target": "22", "source_name": "african american", "target_name": "chamber music", "weight": 1.0, "year": 2017}, {"source": "10", "target": "23", "source_name": "african american", "target_name": "electronic dance music", "weight": 1.0, "year": 2017}, {"source": "10", "target": "24", "source_name": "african american", "target_name": "punk rock", "weight": 2.0, "year": 2017}, {"source": "10", "target": "29", "source_name": "african american", "target_name": "rolling stone", "weight": 1.0, "year": 2017}, {"source": "10", "target": "36", "source_name": "african american", "target_name": "music industry", "weight": 2.0, "year": 2017}, {"source": "10", "target": "38", "source_name": "african american", "target_name": "summary additional listening", "weight": 1.0, "year": 2017}, {"source": "10", "target": "40", "source_name": "african american", "target_name": "musical instruments", "weight": 1.0, "year": 2017}, {"source": "10", "target": "52", "source_name": "african american", "target_name": "folk song", "weight": 1.0, "year": 2017}, {"source": "10", "target": "53", "source_name": "african american", "target_name": "popular music", "weight": 7.0, "year": 2017}, {"source": "10", "target": "54", "source_name": "african american", "target_name": "american popular music", "weight": 1.0, "year": 2017}, {"source": "10", "target": "61", "source_name": "african american", "target_name": "progressive rock", "weight": 1.0, "year": 2017}, {"source": "10", "target": "62", "source_name": "african american", "target_name": "led zeppelin", "weight": 1.0, "year": 2017}, {"source": "10", "target": "65", "source_name": "african american", "target_name": "country music", "weight": 1.0, "year": 2017}, {"source": "10", "target": "69", "source_name": "african american", "target_name": "classical music", "weight": 2.0, "year": 2017}, {"source": "10", "target": "72", "source_name": "african american", "target_name": "jimi hendrix", "weight": 1.0, "year": 2017}, {"source": "10", "target": "74", "source_name": "african american", "target_name": "united states", "weight": 6.0, "year": 2017}, {"source": "10", "target": "75", "source_name": "african american", "target_name": "world war ii", "weight": 1.0, "year": 2017}, {"source": "10", "target": "77", "source_name": "african american", "target_name": "rock music", "weight": 2.0, "year": 2017}, {"source": "10", "target": "78", "source_name": "african american", "target_name": "hip hop", "weight": 1.0, "year": 2017}, {"source": "10", "target": "79", "source_name": "african american", "target_name": "popular culture", "weight": 2.0, "year": 2017}, {"source": "10", "target": "80", "source_name": "african american", "target_name": "folk music", "weight": 4.0, "year": 2017}, {"source": "10", "target": "82", "source_name": "african american", "target_name": "heavy metal", "weight": 1.0, "year": 2017}, {"source": "10", "target": "89", "source_name": "african american", "target_name": "electronic music", "weight": 1.0, "year": 2017}, {"source": "11", "target": "17", "source_name": "south africa", "target_name": "civil rights", "weight": 1.0, "year": 2017}, {"source": "11", "target": "21", "source_name": "south africa", "target_name": "social protest", "weight": 2.0, "year": 2017}, {"source": "11", "target": "23", "source_name": "south africa", "target_name": "electronic dance music", "weight": 1.0, "year": 2017}, {"source": "11", "target": "25", "source_name": "south africa", "target_name": "russian rock", "weight": 1.0, "year": 2017}, {"source": "11", "target": "36", "source_name": "south africa", "target_name": "music industry", "weight": 1.0, "year": 2017}, {"source": "11", "target": "43", "source_name": "south africa", "target_name": "music education", "weight": 1.0, "year": 2017}, {"source": "11", "target": "46", "source_name": "south africa", "target_name": "music festival", "weight": 3.0, "year": 2017}, {"source": "11", "target": "53", "source_name": "south africa", "target_name": "popular music", "weight": 5.0, "year": 2017}, {"source": "11", "target": "61", "source_name": "south africa", "target_name": "progressive rock", "weight": 1.0, "year": 2017}, {"source": "11", "target": "66", "source_name": "south africa", "target_name": "hong kong", "weight": 1.0, "year": 2017}, {"source": "11", "target": "74", "source_name": "south africa", "target_name": "united states", "weight": 3.0, "year": 2017}, {"source": "11", "target": "78", "source_name": "south africa", "target_name": "hip hop", "weight": 1.0, "year": 2017}, {"source": "11", "target": "80", "source_name": "south africa", "target_name": "folk music", "weight": 3.0, "year": 2017}, {"source": "11", "target": "85", "source_name": "south africa", "target_name": "jewish music", "weight": 1.0, "year": 2017}, {"source": "11", "target": "87", "source_name": "south africa", "target_name": "music hall", "weight": 1.0, "year": 2017}, {"source": "11", "target": "88", "source_name": "south africa", "target_name": "oxford university press", "weight": 1.0, "year": 2017}, {"source": "12", "target": "15", "source_name": "rock opera", "target_name": "musical theatre", "weight": 3.0, "year": 2017}, {"source": "12", "target": "33", "source_name": "rock opera", "target_name": "jesus christ", "weight": 2.0, "year": 2017}, {"source": "12", "target": "41", "source_name": "rock opera", "target_name": "youth culture", "weight": 2.0, "year": 2017}, {"source": "12", "target": "48", "source_name": "rock opera", "target_name": "pop music", "weight": 1.0, "year": 2017}, {"source": "12", "target": "53", "source_name": "rock opera", "target_name": "popular music", "weight": 1.0, "year": 2017}, {"source": "12", "target": "57", "source_name": "rock opera", "target_name": "north america", "weight": 1.0, "year": 2017}, {"source": "12", "target": "77", "source_name": "rock opera", "target_name": "rock music", "weight": 3.0, "year": 2017}, {"source": "12", "target": "79", "source_name": "rock opera", "target_name": "popular culture", "weight": 1.0, "year": 2017}, {"source": "15", "target": "33", "source_name": "musical theatre", "target_name": "jesus christ", "weight": 3.0, "year": 2017}, {"source": "15", "target": "53", "source_name": "musical theatre", "target_name": "popular music", "weight": 5.0, "year": 2017}, {"source": "15", "target": "54", "source_name": "musical theatre", "target_name": "american popular music", "weight": 3.0, "year": 2017}, {"source": "15", "target": "57", "source_name": "musical theatre", "target_name": "north america", "weight": 2.0, "year": 2017}, {"source": "15", "target": "70", "source_name": "musical theatre", "target_name": "world war", "weight": 1.0, "year": 2017}, {"source": "15", "target": "74", "source_name": "musical theatre", "target_name": "united states", "weight": 1.0, "year": 2017}, {"source": "15", "target": "77", "source_name": "musical theatre", "target_name": "rock music", "weight": 8.0, "year": 2017}, {"source": "15", "target": "87", "source_name": "musical theatre", "target_name": "music hall", "weight": 1.0, "year": 2017}, {"source": "16", "target": "29", "source_name": "bob dylan", "target_name": "rolling stone", "weight": 4.0, "year": 2017}, {"source": "16", "target": "30", "source_name": "bob dylan", "target_name": "rock band", "weight": 2.0, "year": 2017}, {"source": "16", "target": "36", "source_name": "bob dylan", "target_name": "music industry", "weight": 3.0, "year": 2017}, {"source": "16", "target": "42", "source_name": "bob dylan", "target_name": "simon frith", "weight": 1.0, "year": 2017}, {"source": "16", "target": "44", "source_name": "bob dylan", "target_name": "alternative rock", "weight": 1.0, "year": 2017}, {"source": "16", "target": "48", "source_name": "bob dylan", "target_name": "pop music", "weight": 3.0, "year": 2017}, {"source": "16", "target": "52", "source_name": "bob dylan", "target_name": "folk song", "weight": 1.0, "year": 2017}, {"source": "16", "target": "53", "source_name": "bob dylan", "target_name": "popular music", "weight": 10.0, "year": 2017}, {"source": "16", "target": "54", "source_name": "bob dylan", "target_name": "american popular music", "weight": 1.0, "year": 2017}, {"source": "16", "target": "56", "source_name": "bob dylan", "target_name": "bruce springsteen", "weight": 1.0, "year": 2017}, {"source": "16", "target": "69", "source_name": "bob dylan", "target_name": "classical music", "weight": 1.0, "year": 2017}, {"source": "16", "target": "70", "source_name": "bob dylan", "target_name": "world war", "weight": 1.0, "year": 2017}, {"source": "16", "target": "72", "source_name": "bob dylan", "target_name": "jimi hendrix", "weight": 2.0, "year": 2017}, {"source": "16", "target": "75", "source_name": "bob dylan", "target_name": "world war ii", "weight": 1.0, "year": 2017}, {"source": "16", "target": "77", "source_name": "bob dylan", "target_name": "rock music", "weight": 7.0, "year": 2017}, {"source": "16", "target": "79", "source_name": "bob dylan", "target_name": "popular culture", "weight": 3.0, "year": 2017}, {"source": "16", "target": "80", "source_name": "bob dylan", "target_name": "folk music", "weight": 5.0, "year": 2017}, {"source": "17", "target": "21", "source_name": "civil rights", "target_name": "social protest", "weight": 1.0, "year": 2017}, {"source": "17", "target": "24", "source_name": "civil rights", "target_name": "punk rock", "weight": 1.0, "year": 2017}, {"source": "17", "target": "30", "source_name": "civil rights", "target_name": "rock band", "weight": 1.0, "year": 2017}, {"source": "17", "target": "41", "source_name": "civil rights", "target_name": "youth culture", "weight": 1.0, "year": 2017}, {"source": "17", "target": "53", "source_name": "civil rights", "target_name": "popular music", "weight": 4.0, "year": 2017}, {"source": "17", "target": "54", "source_name": "civil rights", "target_name": "american popular music", "weight": 1.0, "year": 2017}, {"source": "17", "target": "61", "source_name": "civil rights", "target_name": "progressive rock", "weight": 1.0, "year": 2017}, {"source": "17", "target": "70", "source_name": "civil rights", "target_name": "world war", "weight": 1.0, "year": 2017}, {"source": "17", "target": "73", "source_name": "civil rights", "target_name": "southern rock", "weight": 1.0, "year": 2017}, {"source": "17", "target": "74", "source_name": "civil rights", "target_name": "united states", "weight": 3.0, "year": 2017}, {"source": "17", "target": "75", "source_name": "civil rights", "target_name": "world war ii", "weight": 1.0, "year": 2017}, {"source": "17", "target": "77", "source_name": "civil rights", "target_name": "rock music", "weight": 3.0, "year": 2017}, {"source": "17", "target": "79", "source_name": "civil rights", "target_name": "popular culture", "weight": 1.0, "year": 2017}, {"source": "17", "target": "80", "source_name": "civil rights", "target_name": "folk music", "weight": 2.0, "year": 2017}, {"source": "18", "target": "19", "source_name": "middle class", "target_name": "music video", "weight": 1.0, "year": 2017}, {"source": "18", "target": "28", "source_name": "middle class", "target_name": "high school", "weight": 1.0, "year": 2017}, {"source": "18", "target": "30", "source_name": "middle class", "target_name": "rock band", "weight": 2.0, "year": 2017}, {"source": "18", "target": "48", "source_name": "middle class", "target_name": "pop music", "weight": 1.0, "year": 2017}, {"source": "18", "target": "53", "source_name": "middle class", "target_name": "popular music", "weight": 2.0, "year": 2017}, {"source": "18", "target": "61", "source_name": "middle class", "target_name": "progressive rock", "weight": 2.0, "year": 2017}, {"source": "18", "target": "77", "source_name": "middle class", "target_name": "rock music", "weight": 2.0, "year": 2017}, {"source": "19", "target": "22", "source_name": "music video", "target_name": "chamber music", "weight": 1.0, "year": 2017}, {"source": "19", "target": "24", "source_name": "music video", "target_name": "punk rock", "weight": 1.0, "year": 2017}, {"source": "19", "target": "28", "source_name": "music video", "target_name": "high school", "weight": 2.0, "year": 2017}, {"source": "19", "target": "30", "source_name": "music video", "target_name": "rock band", "weight": 3.0, "year": 2017}, {"source": "19", "target": "36", "source_name": "music video", "target_name": "music industry", "weight": 2.0, "year": 2017}, {"source": "19", "target": "38", "source_name": "music video", "target_name": "summary additional listening", "weight": 1.0, "year": 2017}, {"source": "19", "target": "40", "source_name": "music video", "target_name": "musical instruments", "weight": 1.0, "year": 2017}, {"source": "19", "target": "47", "source_name": "music video", "target_name": "hard rock", "weight": 1.0, "year": 2017}, {"source": "19", "target": "48", "source_name": "music video", "target_name": "pop music", "weight": 4.0, "year": 2017}, {"source": "19", "target": "49", "source_name": "music video", "target_name": "music theory", "weight": 1.0, "year": 2017}, {"source": "19", "target": "51", "source_name": "music video", "target_name": "cultural identity", "weight": 2.0, "year": 2017}, {"source": "19", "target": "52", "source_name": "music video", "target_name": "folk song", "weight": 1.0, "year": 2017}, {"source": "19", "target": "53", "source_name": "music video", "target_name": "popular music", "weight": 9.0, "year": 2017}, {"source": "19", "target": "54", "source_name": "music video", "target_name": "american popular music", "weight": 1.0, "year": 2017}, {"source": "19", "target": "61", "source_name": "music video", "target_name": "progressive rock", "weight": 1.0, "year": 2017}, {"source": "19", "target": "65", "source_name": "music video", "target_name": "country music", "weight": 4.0, "year": 2017}, {"source": "19", "target": "69", "source_name": "music video", "target_name": "classical music", "weight": 2.0, "year": 2017}, {"source": "19", "target": "72", "source_name": "music video", "target_name": "jimi hendrix", "weight": 1.0, "year": 2017}, {"source": "19", "target": "74", "source_name": "music video", "target_name": "united states", "weight": 3.0, "year": 2017}, {"source": "19", "target": "76", "source_name": "music video", "target_name": "los angeles", "weight": 1.0, "year": 2017}, {"source": "19", "target": "77", "source_name": "music video", "target_name": "rock music", "weight": 10.0, "year": 2017}, {"source": "19", "target": "78", "source_name": "music video", "target_name": "hip hop", "weight": 2.0, "year": 2017}, {"source": "19", "target": "80", "source_name": "music video", "target_name": "folk music", "weight": 1.0, "year": 2017}, {"source": "19", "target": "82", "source_name": "music video", "target_name": "heavy metal", "weight": 1.0, "year": 2017}, {"source": "19", "target": "89", "source_name": "music video", "target_name": "electronic music", "weight": 1.0, "year": 2017}, {"source": "19", "target": "90", "source_name": "music video", "target_name": "blues rock", "weight": 1.0, "year": 2017}, {"source": "20", "target": "24", "source_name": "garage rock", "target_name": "punk rock", "weight": 1.0, "year": 2017}, {"source": "20", "target": "27", "source_name": "garage rock", "target_name": "pop rock", "weight": 1.0, "year": 2017}, {"source": "20", "target": "29", "source_name": "garage rock", "target_name": "rolling stone", "weight": 1.0, "year": 2017}, {"source": "20", "target": "30", "source_name": "garage rock", "target_name": "rock band", "weight": 2.0, "year": 2017}, {"source": "20", "target": "43", "source_name": "garage rock", "target_name": "music education", "weight": 1.0, "year": 2017}, {"source": "20", "target": "44", "source_name": "garage rock", "target_name": "alternative rock", "weight": 2.0, "year": 2017}, {"source": "20", "target": "47", "source_name": "garage rock", "target_name": "hard rock", "weight": 1.0, "year": 2017}, {"source": "20", "target": "48", "source_name": "garage rock", "target_name": "pop music", "weight": 1.0, "year": 2017}, {"source": "20", "target": "53", "source_name": "garage rock", "target_name": "popular music", "weight": 4.0, "year": 2017}, {"source": "20", "target": "57", "source_name": "garage rock", "target_name": "north america", "weight": 1.0, "year": 2017}, {"source": "20", "target": "65", "source_name": "garage rock", "target_name": "country music", "weight": 1.0, "year": 2017}, {"source": "20", "target": "73", "source_name": "garage rock", "target_name": "southern rock", "weight": 1.0, "year": 2017}, {"source": "20", "target": "77", "source_name": "garage rock", "target_name": "rock music", "weight": 5.0, "year": 2017}, {"source": "20", "target": "80", "source_name": "garage rock", "target_name": "folk music", "weight": 1.0, "year": 2017}, {"source": "21", "target": "47", "source_name": "social protest", "target_name": "hard rock", "weight": 1.0, "year": 2017}, {"source": "21", "target": "48", "source_name": "social protest", "target_name": "pop music", "weight": 1.0, "year": 2017}, {"source": "21", "target": "53", "source_name": "social protest", "target_name": "popular music", "weight": 4.0, "year": 2017}, {"source": "21", "target": "57", "source_name": "social protest", "target_name": "north america", "weight": 2.0, "year": 2017}, {"source": "21", "target": "61", "source_name": "social protest", "target_name": "progressive rock", "weight": 1.0, "year": 2017}, {"source": "21", "target": "71", "source_name": "social protest", "target_name": "latin american", "weight": 1.0, "year": 2017}, {"source": "21", "target": "74", "source_name": "social protest", "target_name": "united states", "weight": 2.0, "year": 2017}, {"source": "21", "target": "77", "source_name": "social protest", "target_name": "rock music", "weight": 1.0, "year": 2017}, {"source": "21", "target": "80", "source_name": "social protest", "target_name": "folk music", "weight": 2.0, "year": 2017}, {"source": "21", "target": "82", "source_name": "social protest", "target_name": "heavy metal", "weight": 1.0, "year": 2017}, {"source": "21", "target": "87", "source_name": "social protest", "target_name": "music hall", "weight": 1.0, "year": 2017}, {"source": "22", "target": "35", "source_name": "chamber music", "target_name": "ancient greek", "weight": 1.0, "year": 2017}, {"source": "22", "target": "36", "source_name": "chamber music", "target_name": "music industry", "weight": 1.0, "year": 2017}, {"source": "22", "target": "38", "source_name": "chamber music", "target_name": "summary additional listening", "weight": 1.0, "year": 2017}, {"source": "22", "target": "40", "source_name": "chamber music", "target_name": "musical instruments", "weight": 1.0, "year": 2017}, {"source": "22", "target": "48", "source_name": "chamber music", "target_name": "pop music", "weight": 1.0, "year": 2017}, {"source": "22", "target": "52", "source_name": "chamber music", "target_name": "folk song", "weight": 1.0, "year": 2017}, {"source": "22", "target": "53", "source_name": "chamber music", "target_name": "popular music", "weight": 2.0, "year": 2017}, {"source": "22", "target": "54", "source_name": "chamber music", "target_name": "american popular music", "weight": 1.0, "year": 2017}, {"source": "22", "target": "65", "source_name": "chamber music", "target_name": "country music", "weight": 2.0, "year": 2017}, {"source": "22", "target": "69", "source_name": "chamber music", "target_name": "classical music", "weight": 3.0, "year": 2017}, {"source": "22", "target": "74", "source_name": "chamber music", "target_name": "united states", "weight": 1.0, "year": 2017}, {"source": "22", "target": "77", "source_name": "chamber music", "target_name": "rock music", "weight": 1.0, "year": 2017}, {"source": "22", "target": "79", "source_name": "chamber music", "target_name": "popular culture", "weight": 1.0, "year": 2017}, {"source": "22", "target": "80", "source_name": "chamber music", "target_name": "folk music", "weight": 2.0, "year": 2017}, {"source": "22", "target": "89", "source_name": "chamber music", "target_name": "electronic music", "weight": 3.0, "year": 2017}, {"source": "23", "target": "24", "source_name": "electronic dance music", "target_name": "punk rock", "weight": 1.0, "year": 2017}, {"source": "23", "target": "36", "source_name": "electronic dance music", "target_name": "music industry", "weight": 2.0, "year": 2017}, {"source": "23", "target": "42", "source_name": "electronic dance music", "target_name": "simon frith", "weight": 2.0, "year": 2017}, {"source": "23", "target": "47", "source_name": "electronic dance music", "target_name": "hard rock", "weight": 1.0, "year": 2017}, {"source": "23", "target": "53", "source_name": "electronic dance music", "target_name": "popular music", "weight": 10.0, "year": 2017}, {"source": "23", "target": "56", "source_name": "electronic dance music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2017}, {"source": "23", "target": "57", "source_name": "electronic dance music", "target_name": "north america", "weight": 1.0, "year": 2017}, {"source": "23", "target": "60", "source_name": "electronic dance music", "target_name": "cultural studies", "weight": 2.0, "year": 2017}, {"source": "23", "target": "67", "source_name": "electronic dance music", "target_name": "rock art", "weight": 1.0, "year": 2017}, {"source": "23", "target": "74", "source_name": "electronic dance music", "target_name": "united states", "weight": 2.0, "year": 2017}, {"source": "23", "target": "76", "source_name": "electronic dance music", "target_name": "los angeles", "weight": 1.0, "year": 2017}, {"source": "23", "target": "77", "source_name": "electronic dance music", "target_name": "rock music", "weight": 1.0, "year": 2017}, {"source": "23", "target": "78", "source_name": "electronic dance music", "target_name": "hip hop", "weight": 1.0, "year": 2017}, {"source": "23", "target": "79", "source_name": "electronic dance music", "target_name": "popular culture", "weight": 1.0, "year": 2017}, {"source": "23", "target": "82", "source_name": "electronic dance music", "target_name": "heavy metal", "weight": 3.0, "year": 2017}, {"source": "23", "target": "88", "source_name": "electronic dance music", "target_name": "oxford university press", "weight": 1.0, "year": 2017}, {"source": "23", "target": "89", "source_name": "electronic dance music", "target_name": "electronic music", "weight": 4.0, "year": 2017}, {"source": "24", "target": "27", "source_name": "punk rock", "target_name": "pop rock", "weight": 1.0, "year": 2017}, {"source": "24", "target": "30", "source_name": "punk rock", "target_name": "rock band", "weight": 1.0, "year": 2017}, {"source": "24", "target": "36", "source_name": "punk rock", "target_name": "music industry", "weight": 1.0, "year": 2017}, {"source": "24", "target": "41", "source_name": "punk rock", "target_name": "youth culture", "weight": 2.0, "year": 2017}, {"source": "24", "target": "42", "source_name": "punk rock", "target_name": "simon frith", "weight": 1.0, "year": 2017}, {"source": "24", "target": "44", "source_name": "punk rock", "target_name": "alternative rock", "weight": 4.0, "year": 2017}, {"source": "24", "target": "47", "source_name": "punk rock", "target_name": "hard rock", "weight": 5.0, "year": 2017}, {"source": "24", "target": "48", "source_name": "punk rock", "target_name": "pop music", "weight": 4.0, "year": 2017}, {"source": "24", "target": "51", "source_name": "punk rock", "target_name": "cultural identity", "weight": 1.0, "year": 2017}, {"source": "24", "target": "53", "source_name": "punk rock", "target_name": "popular music", "weight": 13.0, "year": 2017}, {"source": "24", "target": "57", "source_name": "punk rock", "target_name": "north america", "weight": 1.0, "year": 2017}, {"source": "24", "target": "61", "source_name": "punk rock", "target_name": "progressive rock", "weight": 3.0, "year": 2017}, {"source": "24", "target": "65", "source_name": "punk rock", "target_name": "country music", "weight": 1.0, "year": 2017}, {"source": "24", "target": "69", "source_name": "punk rock", "target_name": "classical music", "weight": 1.0, "year": 2017}, {"source": "24", "target": "74", "source_name": "punk rock", "target_name": "united states", "weight": 3.0, "year": 2017}, {"source": "24", "target": "77", "source_name": "punk rock", "target_name": "rock music", "weight": 12.0, "year": 2017}, {"source": "24", "target": "78", "source_name": "punk rock", "target_name": "hip hop", "weight": 1.0, "year": 2017}, {"source": "24", "target": "79", "source_name": "punk rock", "target_name": "popular culture", "weight": 1.0, "year": 2017}, {"source": "24", "target": "80", "source_name": "punk rock", "target_name": "folk music", "weight": 1.0, "year": 2017}, {"source": "24", "target": "82", "source_name": "punk rock", "target_name": "heavy metal", "weight": 6.0, "year": 2017}, {"source": "25", "target": "30", "source_name": "russian rock", "target_name": "rock band", "weight": 1.0, "year": 2017}, {"source": "25", "target": "37", "source_name": "russian rock", "target_name": "middle ages", "weight": 1.0, "year": 2017}, {"source": "25", "target": "46", "source_name": "russian rock", "target_name": "music festival", "weight": 1.0, "year": 2017}, {"source": "25", "target": "53", "source_name": "russian rock", "target_name": "popular music", "weight": 2.0, "year": 2017}, {"source": "25", "target": "66", "source_name": "russian rock", "target_name": "hong kong", "weight": 1.0, "year": 2017}, {"source": "25", "target": "77", "source_name": "russian rock", "target_name": "rock music", "weight": 3.0, "year": 2017}, {"source": "25", "target": "78", "source_name": "russian rock", "target_name": "hip hop", "weight": 1.0, "year": 2017}, {"source": "25", "target": "80", "source_name": "russian rock", "target_name": "folk music", "weight": 1.0, "year": 2017}, {"source": "25", "target": "85", "source_name": "russian rock", "target_name": "jewish music", "weight": 1.0, "year": 2017}, {"source": "26", "target": "43", "source_name": "information technology", "target_name": "music education", "weight": 1.0, "year": 2017}, {"source": "27", "target": "44", "source_name": "pop rock", "target_name": "alternative rock", "weight": 1.0, "year": 2017}, {"source": "27", "target": "47", "source_name": "pop rock", "target_name": "hard rock", "weight": 1.0, "year": 2017}, {"source": "27", "target": "48", "source_name": "pop rock", "target_name": "pop music", "weight": 1.0, "year": 2017}, {"source": "27", "target": "53", "source_name": "pop rock", "target_name": "popular music", "weight": 1.0, "year": 2017}, {"source": "27", "target": "64", "source_name": "pop rock", "target_name": "english language", "weight": 1.0, "year": 2017}, {"source": "27", "target": "65", "source_name": "pop rock", "target_name": "country music", "weight": 1.0, "year": 2017}, {"source": "27", "target": "66", "source_name": "pop rock", "target_name": "hong kong", "weight": 1.0, "year": 2017}, {"source": "27", "target": "67", "source_name": "pop rock", "target_name": "rock art", "weight": 1.0, "year": 2017}, {"source": "27", "target": "77", "source_name": "pop rock", "target_name": "rock music", "weight": 1.0, "year": 2017}, {"source": "27", "target": "83", "source_name": "pop rock", "target_name": "folk rock", "weight": 1.0, "year": 2017}, {"source": "28", "target": "30", "source_name": "high school", "target_name": "rock band", "weight": 1.0, "year": 2017}, {"source": "28", "target": "37", "source_name": "high school", "target_name": "middle ages", "weight": 1.0, "year": 2017}, {"source": "28", "target": "48", "source_name": "high school", "target_name": "pop music", "weight": 2.0, "year": 2017}, {"source": "28", "target": "53", "source_name": "high school", "target_name": "popular music", "weight": 1.0, "year": 2017}, {"source": "28", "target": "61", "source_name": "high school", "target_name": "progressive rock", "weight": 1.0, "year": 2017}, {"source": "28", "target": "69", "source_name": "high school", "target_name": "classical music", "weight": 1.0, "year": 2017}, {"source": "28", "target": "74", "source_name": "high school", "target_name": "united states", "weight": 1.0, "year": 2017}, {"source": "28", "target": "77", "source_name": "high school", "target_name": "rock music", "weight": 6.0, "year": 2017}, {"source": "28", "target": "82", "source_name": "high school", "target_name": "heavy metal", "weight": 1.0, "year": 2017}, {"source": "29", "target": "30", "source_name": "rolling stone", "target_name": "rock band", "weight": 1.0, "year": 2017}, {"source": "29", "target": "36", "source_name": "rolling stone", "target_name": "music industry", "weight": 2.0, "year": 2017}, {"source": "29", "target": "42", "source_name": "rolling stone", "target_name": "simon frith", "weight": 1.0, "year": 2017}, {"source": "29", "target": "44", "source_name": "rolling stone", "target_name": "alternative rock", "weight": 1.0, "year": 2017}, {"source": "29", "target": "48", "source_name": "rolling stone", "target_name": "pop music", "weight": 4.0, "year": 2017}, {"source": "29", "target": "53", "source_name": "rolling stone", "target_name": "popular music", "weight": 10.0, "year": 2017}, {"source": "29", "target": "54", "source_name": "rolling stone", "target_name": "american popular music", "weight": 2.0, "year": 2017}, {"source": "29", "target": "55", "source_name": "rolling stone", "target_name": "rock criticism", "weight": 4.0, "year": 2017}, {"source": "29", "target": "56", "source_name": "rolling stone", "target_name": "bruce springsteen", "weight": 2.0, "year": 2017}, {"source": "29", "target": "62", "source_name": "rolling stone", "target_name": "led zeppelin", "weight": 2.0, "year": 2017}, {"source": "29", "target": "69", "source_name": "rolling stone", "target_name": "classical music", "weight": 1.0, "year": 2017}, {"source": "29", "target": "72", "source_name": "rolling stone", "target_name": "jimi hendrix", "weight": 3.0, "year": 2017}, {"source": "29", "target": "74", "source_name": "rolling stone", "target_name": "united states", "weight": 2.0, "year": 2017}, {"source": "29", "target": "77", "source_name": "rolling stone", "target_name": "rock music", "weight": 9.0, "year": 2017}, {"source": "29", "target": "79", "source_name": "rolling stone", "target_name": "popular culture", "weight": 3.0, "year": 2017}, {"source": "29", "target": "80", "source_name": "rolling stone", "target_name": "folk music", "weight": 1.0, "year": 2017}, {"source": "29", "target": "87", "source_name": "rolling stone", "target_name": "music hall", "weight": 2.0, "year": 2017}, {"source": "30", "target": "36", "source_name": "rock band", "target_name": "music industry", "weight": 3.0, "year": 2017}, {"source": "30", "target": "37", "source_name": "rock band", "target_name": "middle ages", "weight": 2.0, "year": 2017}, {"source": "30", "target": "41", "source_name": "rock band", "target_name": "youth culture", "weight": 1.0, "year": 2017}, {"source": "30", "target": "43", "source_name": "rock band", "target_name": "music education", "weight": 4.0, "year": 2017}, {"source": "30", "target": "44", "source_name": "rock band", "target_name": "alternative rock", "weight": 1.0, "year": 2017}, {"source": "30", "target": "47", "source_name": "rock band", "target_name": "hard rock", "weight": 1.0, "year": 2017}, {"source": "30", "target": "48", "source_name": "rock band", "target_name": "pop music", "weight": 1.0, "year": 2017}, {"source": "30", "target": "52", "source_name": "rock band", "target_name": "folk song", "weight": 2.0, "year": 2017}, {"source": "30", "target": "53", "source_name": "rock band", "target_name": "popular music", "weight": 22.0, "year": 2017}, {"source": "30", "target": "54", "source_name": "rock band", "target_name": "american popular music", "weight": 1.0, "year": 2017}, {"source": "30", "target": "55", "source_name": "rock band", "target_name": "rock criticism", "weight": 1.0, "year": 2017}, {"source": "30", "target": "61", "source_name": "rock band", "target_name": "progressive rock", "weight": 11.0, "year": 2017}, {"source": "30", "target": "62", "source_name": "rock band", "target_name": "led zeppelin", "weight": 1.0, "year": 2017}, {"source": "30", "target": "65", "source_name": "rock band", "target_name": "country music", "weight": 1.0, "year": 2017}, {"source": "30", "target": "67", "source_name": "rock band", "target_name": "rock art", "weight": 1.0, "year": 2017}, {"source": "30", "target": "69", "source_name": "rock band", "target_name": "classical music", "weight": 4.0, "year": 2017}, {"source": "30", "target": "72", "source_name": "rock band", "target_name": "jimi hendrix", "weight": 2.0, "year": 2017}, {"source": "30", "target": "73", "source_name": "rock band", "target_name": "southern rock", "weight": 2.0, "year": 2017}, {"source": "30", "target": "74", "source_name": "rock band", "target_name": "united states", "weight": 2.0, "year": 2017}, {"source": "30", "target": "76", "source_name": "rock band", "target_name": "los angeles", "weight": 1.0, "year": 2017}, {"source": "30", "target": "77", "source_name": "rock band", "target_name": "rock music", "weight": 36.0, "year": 2017}, {"source": "30", "target": "79", "source_name": "rock band", "target_name": "popular culture", "weight": 2.0, "year": 2017}, {"source": "30", "target": "80", "source_name": "rock band", "target_name": "folk music", "weight": 2.0, "year": 2017}, {"source": "30", "target": "82", "source_name": "rock band", "target_name": "heavy metal", "weight": 4.0, "year": 2017}, {"source": "30", "target": "83", "source_name": "rock band", "target_name": "folk rock", "weight": 1.0, "year": 2017}, {"source": "30", "target": "87", "source_name": "rock band", "target_name": "music hall", "weight": 1.0, "year": 2017}, {"source": "31", "target": "69", "source_name": "post modernism", "target_name": "classical music", "weight": 1.0, "year": 2017}, {"source": "32", "target": "43", "source_name": "higher education", "target_name": "music education", "weight": 4.0, "year": 2017}, {"source": "32", "target": "53", "source_name": "higher education", "target_name": "popular music", "weight": 1.0, "year": 2017}, {"source": "32", "target": "60", "source_name": "higher education", "target_name": "cultural studies", "weight": 1.0, "year": 2017}, {"source": "32", "target": "69", "source_name": "higher education", "target_name": "classical music", "weight": 1.0, "year": 2017}, {"source": "33", "target": "53", "source_name": "jesus christ", "target_name": "popular music", "weight": 1.0, "year": 2017}, {"source": "33", "target": "70", "source_name": "jesus christ", "target_name": "world war", "weight": 1.0, "year": 2017}, {"source": "33", "target": "77", "source_name": "jesus christ", "target_name": "rock music", "weight": 4.0, "year": 2017}, {"source": "34", "target": "36", "source_name": "mass media", "target_name": "music industry", "weight": 1.0, "year": 2017}, {"source": "34", "target": "40", "source_name": "mass media", "target_name": "musical instruments", "weight": 1.0, "year": 2017}, {"source": "34", "target": "41", "source_name": "mass media", "target_name": "youth culture", "weight": 1.0, "year": 2017}, {"source": "34", "target": "43", "source_name": "mass media", "target_name": "music education", "weight": 2.0, "year": 2017}, {"source": "34", "target": "46", "source_name": "mass media", "target_name": "music festival", "weight": 1.0, "year": 2017}, {"source": "34", "target": "48", "source_name": "mass media", "target_name": "pop music", "weight": 2.0, "year": 2017}, {"source": "34", "target": "51", "source_name": "mass media", "target_name": "cultural identity", "weight": 1.0, "year": 2017}, {"source": "34", "target": "52", "source_name": "mass media", "target_name": "folk song", "weight": 2.0, "year": 2017}, {"source": "34", "target": "53", "source_name": "mass media", "target_name": "popular music", "weight": 6.0, "year": 2017}, {"source": "34", "target": "60", "source_name": "mass media", "target_name": "cultural studies", "weight": 1.0, "year": 2017}, {"source": "34", "target": "65", "source_name": "mass media", "target_name": "country music", "weight": 1.0, "year": 2017}, {"source": "34", "target": "66", "source_name": "mass media", "target_name": "hong kong", "weight": 1.0, "year": 2017}, {"source": "34", "target": "67", "source_name": "mass media", "target_name": "rock art", "weight": 1.0, "year": 2017}, {"source": "34", "target": "69", "source_name": "mass media", "target_name": "classical music", "weight": 1.0, "year": 2017}, {"source": "34", "target": "77", "source_name": "mass media", "target_name": "rock music", "weight": 4.0, "year": 2017}, {"source": "34", "target": "79", "source_name": "mass media", "target_name": "popular culture", "weight": 2.0, "year": 2017}, {"source": "35", "target": "43", "source_name": "ancient greek", "target_name": "music education", "weight": 1.0, "year": 2017}, {"source": "35", "target": "65", "source_name": "ancient greek", "target_name": "country music", "weight": 1.0, "year": 2017}, {"source": "35", "target": "77", "source_name": "ancient greek", "target_name": "rock music", "weight": 1.0, "year": 2017}, {"source": "35", "target": "80", "source_name": "ancient greek", "target_name": "folk music", "weight": 1.0, "year": 2017}, {"source": "35", "target": "89", "source_name": "ancient greek", "target_name": "electronic music", "weight": 1.0, "year": 2017}, {"source": "36", "target": "38", "source_name": "music industry", "target_name": "summary additional listening", "weight": 1.0, "year": 2017}, {"source": "36", "target": "40", "source_name": "music industry", "target_name": "musical instruments", "weight": 1.0, "year": 2017}, {"source": "36", "target": "41", "source_name": "music industry", "target_name": "youth culture", "weight": 2.0, "year": 2017}, {"source": "36", "target": "42", "source_name": "music industry", "target_name": "simon frith", "weight": 2.0, "year": 2017}, {"source": "36", "target": "43", "source_name": "music industry", "target_name": "music education", "weight": 3.0, "year": 2017}, {"source": "36", "target": "44", "source_name": "music industry", "target_name": "alternative rock", "weight": 1.0, "year": 2017}, {"source": "36", "target": "46", "source_name": "music industry", "target_name": "music festival", "weight": 1.0, "year": 2017}, {"source": "36", "target": "47", "source_name": "music industry", "target_name": "hard rock", "weight": 3.0, "year": 2017}, {"source": "36", "target": "48", "source_name": "music industry", "target_name": "pop music", "weight": 10.0, "year": 2017}, {"source": "36", "target": "49", "source_name": "music industry", "target_name": "music theory", "weight": 1.0, "year": 2017}, {"source": "36", "target": "50", "source_name": "music industry", "target_name": "hollywood film", "weight": 1.0, "year": 2017}, {"source": "36", "target": "51", "source_name": "music industry", "target_name": "cultural identity", "weight": 3.0, "year": 2017}, {"source": "36", "target": "52", "source_name": "music industry", "target_name": "folk song", "weight": 1.0, "year": 2017}, {"source": "36", "target": "53", "source_name": "music industry", "target_name": "popular music", "weight": 36.0, "year": 2017}, {"source": "36", "target": "54", "source_name": "music industry", "target_name": "american popular music", "weight": 3.0, "year": 2017}, {"source": "36", "target": "55", "source_name": "music industry", "target_name": "rock criticism", "weight": 3.0, "year": 2017}, {"source": "36", "target": "56", "source_name": "music industry", "target_name": "bruce springsteen", "weight": 2.0, "year": 2017}, {"source": "36", "target": "60", "source_name": "music industry", "target_name": "cultural studies", "weight": 2.0, "year": 2017}, {"source": "36", "target": "61", "source_name": "music industry", "target_name": "progressive rock", "weight": 3.0, "year": 2017}, {"source": "36", "target": "62", "source_name": "music industry", "target_name": "led zeppelin", "weight": 1.0, "year": 2017}, {"source": "36", "target": "64", "source_name": "music industry", "target_name": "english language", "weight": 1.0, "year": 2017}, {"source": "36", "target": "65", "source_name": "music industry", "target_name": "country music", "weight": 2.0, "year": 2017}, {"source": "36", "target": "66", "source_name": "music industry", "target_name": "hong kong", "weight": 1.0, "year": 2017}, {"source": "36", "target": "67", "source_name": "music industry", "target_name": "rock art", "weight": 1.0, "year": 2017}, {"source": "36", "target": "68", "source_name": "music industry", "target_name": "hearing loss", "weight": 1.0, "year": 2017}, {"source": "36", "target": "69", "source_name": "music industry", "target_name": "classical music", "weight": 6.0, "year": 2017}, {"source": "36", "target": "70", "source_name": "music industry", "target_name": "world war", "weight": 2.0, "year": 2017}, {"source": "36", "target": "72", "source_name": "music industry", "target_name": "jimi hendrix", "weight": 4.0, "year": 2017}, {"source": "36", "target": "74", "source_name": "music industry", "target_name": "united states", "weight": 6.0, "year": 2017}, {"source": "36", "target": "75", "source_name": "music industry", "target_name": "world war ii", "weight": 3.0, "year": 2017}, {"source": "36", "target": "76", "source_name": "music industry", "target_name": "los angeles", "weight": 2.0, "year": 2017}, {"source": "36", "target": "77", "source_name": "music industry", "target_name": "rock music", "weight": 24.0, "year": 2017}, {"source": "36", "target": "78", "source_name": "music industry", "target_name": "hip hop", "weight": 6.0, "year": 2017}, {"source": "36", "target": "79", "source_name": "music industry", "target_name": "popular culture", "weight": 6.0, "year": 2017}, {"source": "36", "target": "80", "source_name": "music industry", "target_name": "folk music", "weight": 5.0, "year": 2017}, {"source": "36", "target": "82", "source_name": "music industry", "target_name": "heavy metal", "weight": 2.0, "year": 2017}, {"source": "36", "target": "83", "source_name": "music industry", "target_name": "folk rock", "weight": 1.0, "year": 2017}, {"source": "36", "target": "87", "source_name": "music industry", "target_name": "music hall", "weight": 1.0, "year": 2017}, {"source": "36", "target": "88", "source_name": "music industry", "target_name": "oxford university press", "weight": 2.0, "year": 2017}, {"source": "36", "target": "89", "source_name": "music industry", "target_name": "electronic music", "weight": 3.0, "year": 2017}, {"source": "37", "target": "44", "source_name": "middle ages", "target_name": "alternative rock", "weight": 1.0, "year": 2017}, {"source": "37", "target": "58", "source_name": "middle ages", "target_name": "music therapy", "weight": 1.0, "year": 2017}, {"source": "37", "target": "61", "source_name": "middle ages", "target_name": "progressive rock", "weight": 1.0, "year": 2017}, {"source": "37", "target": "69", "source_name": "middle ages", "target_name": "classical music", "weight": 1.0, "year": 2017}, {"source": "37", "target": "77", "source_name": "middle ages", "target_name": "rock music", "weight": 3.0, "year": 2017}, {"source": "37", "target": "80", "source_name": "middle ages", "target_name": "folk music", "weight": 2.0, "year": 2017}, {"source": "38", "target": "40", "source_name": "summary additional listening", "target_name": "musical instruments", "weight": 1.0, "year": 2017}, {"source": "38", "target": "52", "source_name": "summary additional listening", "target_name": "folk song", "weight": 1.0, "year": 2017}, {"source": "38", "target": "53", "source_name": "summary additional listening", "target_name": "popular music", "weight": 1.0, "year": 2017}, {"source": "38", "target": "54", "source_name": "summary additional listening", "target_name": "american popular music", "weight": 1.0, "year": 2017}, {"source": "38", "target": "65", "source_name": "summary additional listening", "target_name": "country music", "weight": 1.0, "year": 2017}, {"source": "38", "target": "69", "source_name": "summary additional listening", "target_name": "classical music", "weight": 1.0, "year": 2017}, {"source": "38", "target": "74", "source_name": "summary additional listening", "target_name": "united states", "weight": 1.0, "year": 2017}, {"source": "38", "target": "80", "source_name": "summary additional listening", "target_name": "folk music", "weight": 1.0, "year": 2017}, {"source": "38", "target": "89", "source_name": "summary additional listening", "target_name": "electronic music", "weight": 1.0, "year": 2017}, {"source": "40", "target": "43", "source_name": "musical instruments", "target_name": "music education", "weight": 1.0, "year": 2017}, {"source": "40", "target": "49", "source_name": "musical instruments", "target_name": "music theory", "weight": 1.0, "year": 2017}, {"source": "40", "target": "52", "source_name": "musical instruments", "target_name": "folk song", "weight": 1.0, "year": 2017}, {"source": "40", "target": "53", "source_name": "musical instruments", "target_name": "popular music", "weight": 2.0, "year": 2017}, {"source": "40", "target": "54", "source_name": "musical instruments", "target_name": "american popular music", "weight": 2.0, "year": 2017}, {"source": "40", "target": "65", "source_name": "musical instruments", "target_name": "country music", "weight": 1.0, "year": 2017}, {"source": "40", "target": "69", "source_name": "musical instruments", "target_name": "classical music", "weight": 1.0, "year": 2017}, {"source": "40", "target": "70", "source_name": "musical instruments", "target_name": "world war", "weight": 1.0, "year": 2017}, {"source": "40", "target": "74", "source_name": "musical instruments", "target_name": "united states", "weight": 2.0, "year": 2017}, {"source": "40", "target": "75", "source_name": "musical instruments", "target_name": "world war ii", "weight": 1.0, "year": 2017}, {"source": "40", "target": "80", "source_name": "musical instruments", "target_name": "folk music", "weight": 1.0, "year": 2017}, {"source": "40", "target": "89", "source_name": "musical instruments", "target_name": "electronic music", "weight": 2.0, "year": 2017}, {"source": "41", "target": "47", "source_name": "youth culture", "target_name": "hard rock", "weight": 1.0, "year": 2017}, {"source": "41", "target": "48", "source_name": "youth culture", "target_name": "pop music", "weight": 5.0, "year": 2017}, {"source": "41", "target": "51", "source_name": "youth culture", "target_name": "cultural identity", "weight": 2.0, "year": 2017}, {"source": "41", "target": "53", "source_name": "youth culture", "target_name": "popular music", "weight": 8.0, "year": 2017}, {"source": "41", "target": "57", "source_name": "youth culture", "target_name": "north america", "weight": 1.0, "year": 2017}, {"source": "41", "target": "60", "source_name": "youth culture", "target_name": "cultural studies", "weight": 2.0, "year": 2017}, {"source": "41", "target": "61", "source_name": "youth culture", "target_name": "progressive rock", "weight": 1.0, "year": 2017}, {"source": "41", "target": "66", "source_name": "youth culture", "target_name": "hong kong", "weight": 1.0, "year": 2017}, {"source": "41", "target": "74", "source_name": "youth culture", "target_name": "united states", "weight": 2.0, "year": 2017}, {"source": "41", "target": "75", "source_name": "youth culture", "target_name": "world war ii", "weight": 1.0, "year": 2017}, {"source": "41", "target": "77", "source_name": "youth culture", "target_name": "rock music", "weight": 10.0, "year": 2017}, {"source": "41", "target": "80", "source_name": "youth culture", "target_name": "folk music", "weight": 2.0, "year": 2017}, {"source": "42", "target": "47", "source_name": "simon frith", "target_name": "hard rock", "weight": 1.0, "year": 2017}, {"source": "42", "target": "48", "source_name": "simon frith", "target_name": "pop music", "weight": 6.0, "year": 2017}, {"source": "42", "target": "49", "source_name": "simon frith", "target_name": "music theory", "weight": 1.0, "year": 2017}, {"source": "42", "target": "51", "source_name": "simon frith", "target_name": "cultural identity", "weight": 1.0, "year": 2017}, {"source": "42", "target": "53", "source_name": "simon frith", "target_name": "popular music", "weight": 6.0, "year": 2017}, {"source": "42", "target": "55", "source_name": "simon frith", "target_name": "rock criticism", "weight": 2.0, "year": 2017}, {"source": "42", "target": "56", "source_name": "simon frith", "target_name": "bruce springsteen", "weight": 1.0, "year": 2017}, {"source": "42", "target": "57", "source_name": "simon frith", "target_name": "north america", "weight": 1.0, "year": 2017}, {"source": "42", "target": "60", "source_name": "simon frith", "target_name": "cultural studies", "weight": 3.0, "year": 2017}, {"source": "42", "target": "61", "source_name": "simon frith", "target_name": "progressive rock", "weight": 1.0, "year": 2017}, {"source": "42", "target": "65", "source_name": "simon frith", "target_name": "country music", "weight": 1.0, "year": 2017}, {"source": "42", "target": "72", "source_name": "simon frith", "target_name": "jimi hendrix", "weight": 1.0, "year": 2017}, {"source": "42", "target": "76", "source_name": "simon frith", "target_name": "los angeles", "weight": 1.0, "year": 2017}, {"source": "42", "target": "77", "source_name": "simon frith", "target_name": "rock music", "weight": 5.0, "year": 2017}, {"source": "42", "target": "78", "source_name": "simon frith", "target_name": "hip hop", "weight": 1.0, "year": 2017}, {"source": "42", "target": "79", "source_name": "simon frith", "target_name": "popular culture", "weight": 2.0, "year": 2017}, {"source": "42", "target": "82", "source_name": "simon frith", "target_name": "heavy metal", "weight": 1.0, "year": 2017}, {"source": "42", "target": "88", "source_name": "simon frith", "target_name": "oxford university press", "weight": 1.0, "year": 2017}, {"source": "43", "target": "48", "source_name": "music education", "target_name": "pop music", "weight": 2.0, "year": 2017}, {"source": "43", "target": "49", "source_name": "music education", "target_name": "music theory", "weight": 3.0, "year": 2017}, {"source": "43", "target": "52", "source_name": "music education", "target_name": "folk song", "weight": 1.0, "year": 2017}, {"source": "43", "target": "53", "source_name": "music education", "target_name": "popular music", "weight": 7.0, "year": 2017}, {"source": "43", "target": "57", "source_name": "music education", "target_name": "north america", "weight": 1.0, "year": 2017}, {"source": "43", "target": "60", "source_name": "music education", "target_name": "cultural studies", "weight": 2.0, "year": 2017}, {"source": "43", "target": "66", "source_name": "music education", "target_name": "hong kong", "weight": 1.0, "year": 2017}, {"source": "43", "target": "69", "source_name": "music education", "target_name": "classical music", "weight": 3.0, "year": 2017}, {"source": "43", "target": "74", "source_name": "music education", "target_name": "united states", "weight": 1.0, "year": 2017}, {"source": "43", "target": "77", "source_name": "music education", "target_name": "rock music", "weight": 6.0, "year": 2017}, {"source": "43", "target": "79", "source_name": "music education", "target_name": "popular culture", "weight": 1.0, "year": 2017}, {"source": "43", "target": "80", "source_name": "music education", "target_name": "folk music", "weight": 6.0, "year": 2017}, {"source": "43", "target": "82", "source_name": "music education", "target_name": "heavy metal", "weight": 1.0, "year": 2017}, {"source": "44", "target": "46", "source_name": "alternative rock", "target_name": "music festival", "weight": 1.0, "year": 2017}, {"source": "44", "target": "47", "source_name": "alternative rock", "target_name": "hard rock", "weight": 3.0, "year": 2017}, {"source": "44", "target": "48", "source_name": "alternative rock", "target_name": "pop music", "weight": 1.0, "year": 2017}, {"source": "44", "target": "51", "source_name": "alternative rock", "target_name": "cultural identity", "weight": 1.0, "year": 2017}, {"source": "44", "target": "53", "source_name": "alternative rock", "target_name": "popular music", "weight": 11.0, "year": 2017}, {"source": "44", "target": "57", "source_name": "alternative rock", "target_name": "north america", "weight": 3.0, "year": 2017}, {"source": "44", "target": "61", "source_name": "alternative rock", "target_name": "progressive rock", "weight": 1.0, "year": 2017}, {"source": "44", "target": "65", "source_name": "alternative rock", "target_name": "country music", "weight": 3.0, "year": 2017}, {"source": "44", "target": "67", "source_name": "alternative rock", "target_name": "rock art", "weight": 1.0, "year": 2017}, {"source": "44", "target": "73", "source_name": "alternative rock", "target_name": "southern rock", "weight": 1.0, "year": 2017}, {"source": "44", "target": "74", "source_name": "alternative rock", "target_name": "united states", "weight": 2.0, "year": 2017}, {"source": "44", "target": "77", "source_name": "alternative rock", "target_name": "rock music", "weight": 8.0, "year": 2017}, {"source": "44", "target": "78", "source_name": "alternative rock", "target_name": "hip hop", "weight": 1.0, "year": 2017}, {"source": "44", "target": "79", "source_name": "alternative rock", "target_name": "popular culture", "weight": 1.0, "year": 2017}, {"source": "44", "target": "80", "source_name": "alternative rock", "target_name": "folk music", "weight": 1.0, "year": 2017}, {"source": "44", "target": "82", "source_name": "alternative rock", "target_name": "heavy metal", "weight": 2.0, "year": 2017}, {"source": "45", "target": "77", "source_name": "double bass", "target_name": "rock music", "weight": 2.0, "year": 2017}, {"source": "46", "target": "47", "source_name": "music festival", "target_name": "hard rock", "weight": 1.0, "year": 2017}, {"source": "46", "target": "48", "source_name": "music festival", "target_name": "pop music", "weight": 2.0, "year": 2017}, {"source": "46", "target": "53", "source_name": "music festival", "target_name": "popular music", "weight": 2.0, "year": 2017}, {"source": "46", "target": "61", "source_name": "music festival", "target_name": "progressive rock", "weight": 1.0, "year": 2017}, {"source": "46", "target": "65", "source_name": "music festival", "target_name": "country music", "weight": 1.0, "year": 2017}, {"source": "46", "target": "66", "source_name": "music festival", "target_name": "hong kong", "weight": 1.0, "year": 2017}, {"source": "46", "target": "69", "source_name": "music festival", "target_name": "classical music", "weight": 3.0, "year": 2017}, {"source": "46", "target": "77", "source_name": "music festival", "target_name": "rock music", "weight": 6.0, "year": 2017}, {"source": "46", "target": "78", "source_name": "music festival", "target_name": "hip hop", "weight": 1.0, "year": 2017}, {"source": "46", "target": "80", "source_name": "music festival", "target_name": "folk music", "weight": 2.0, "year": 2017}, {"source": "46", "target": "82", "source_name": "music festival", "target_name": "heavy metal", "weight": 1.0, "year": 2017}, {"source": "46", "target": "85", "source_name": "music festival", "target_name": "jewish music", "weight": 1.0, "year": 2017}, {"source": "46", "target": "86", "source_name": "music festival", "target_name": "south korea", "weight": 2.0, "year": 2017}, {"source": "47", "target": "48", "source_name": "hard rock", "target_name": "pop music", "weight": 2.0, "year": 2017}, {"source": "47", "target": "51", "source_name": "hard rock", "target_name": "cultural identity", "weight": 1.0, "year": 2017}, {"source": "47", "target": "53", "source_name": "hard rock", "target_name": "popular music", "weight": 5.0, "year": 2017}, {"source": "47", "target": "56", "source_name": "hard rock", "target_name": "bruce springsteen", "weight": 1.0, "year": 2017}, {"source": "47", "target": "57", "source_name": "hard rock", "target_name": "north america", "weight": 1.0, "year": 2017}, {"source": "47", "target": "59", "source_name": "hard rock", "target_name": "college students", "weight": 1.0, "year": 2017}, {"source": "47", "target": "61", "source_name": "hard rock", "target_name": "progressive rock", "weight": 2.0, "year": 2017}, {"source": "47", "target": "65", "source_name": "hard rock", "target_name": "country music", "weight": 2.0, "year": 2017}, {"source": "47", "target": "69", "source_name": "hard rock", "target_name": "classical music", "weight": 2.0, "year": 2017}, {"source": "47", "target": "74", "source_name": "hard rock", "target_name": "united states", "weight": 1.0, "year": 2017}, {"source": "47", "target": "77", "source_name": "hard rock", "target_name": "rock music", "weight": 13.0, "year": 2017}, {"source": "47", "target": "78", "source_name": "hard rock", "target_name": "hip hop", "weight": 1.0, "year": 2017}, {"source": "47", "target": "79", "source_name": "hard rock", "target_name": "popular culture", "weight": 2.0, "year": 2017}, {"source": "47", "target": "82", "source_name": "hard rock", "target_name": "heavy metal", "weight": 9.0, "year": 2017}, {"source": "47", "target": "83", "source_name": "hard rock", "target_name": "folk rock", "weight": 1.0, "year": 2017}, {"source": "47", "target": "89", "source_name": "hard rock", "target_name": "electronic music", "weight": 1.0, "year": 2017}, {"source": "48", "target": "49", "source_name": "pop music", "target_name": "music theory", "weight": 1.0, "year": 2017}, {"source": "48", "target": "51", "source_name": "pop music", "target_name": "cultural identity", "weight": 3.0, "year": 2017}, {"source": "48", "target": "52", "source_name": "pop music", "target_name": "folk song", "weight": 2.0, "year": 2017}, {"source": "48", "target": "53", "source_name": "pop music", "target_name": "popular music", "weight": 44.0, "year": 2017}, {"source": "48", "target": "55", "source_name": "pop music", "target_name": "rock criticism", "weight": 2.0, "year": 2017}, {"source": "48", "target": "57", "source_name": "pop music", "target_name": "north america", "weight": 2.0, "year": 2017}, {"source": "48", "target": "59", "source_name": "pop music", "target_name": "college students", "weight": 3.0, "year": 2017}, {"source": "48", "target": "60", "source_name": "pop music", "target_name": "cultural studies", "weight": 1.0, "year": 2017}, {"source": "48", "target": "62", "source_name": "pop music", "target_name": "led zeppelin", "weight": 2.0, "year": 2017}, {"source": "48", "target": "64", "source_name": "pop music", "target_name": "english language", "weight": 2.0, "year": 2017}, {"source": "48", "target": "65", "source_name": "pop music", "target_name": "country music", "weight": 2.0, "year": 2017}, {"source": "48", "target": "66", "source_name": "pop music", "target_name": "hong kong", "weight": 4.0, "year": 2017}, {"source": "48", "target": "67", "source_name": "pop music", "target_name": "rock art", "weight": 3.0, "year": 2017}, {"source": "48", "target": "69", "source_name": "pop music", "target_name": "classical music", "weight": 9.0, "year": 2017}, {"source": "48", "target": "70", "source_name": "pop music", "target_name": "world war", "weight": 2.0, "year": 2017}, {"source": "48", "target": "71", "source_name": "pop music", "target_name": "latin american", "weight": 1.0, "year": 2017}, {"source": "48", "target": "72", "source_name": "pop music", "target_name": "jimi hendrix", "weight": 3.0, "year": 2017}, {"source": "48", "target": "74", "source_name": "pop music", "target_name": "united states", "weight": 5.0, "year": 2017}, {"source": "48", "target": "76", "source_name": "pop music", "target_name": "los angeles", "weight": 1.0, "year": 2017}, {"source": "48", "target": "77", "source_name": "pop music", "target_name": "rock music", "weight": 38.0, "year": 2017}, {"source": "48", "target": "78", "source_name": "pop music", "target_name": "hip hop", "weight": 4.0, "year": 2017}, {"source": "48", "target": "79", "source_name": "pop music", "target_name": "popular culture", "weight": 6.0, "year": 2017}, {"source": "48", "target": "80", "source_name": "pop music", "target_name": "folk music", "weight": 7.0, "year": 2017}, {"source": "48", "target": "82", "source_name": "pop music", "target_name": "heavy metal", "weight": 2.0, "year": 2017}, {"source": "48", "target": "83", "source_name": "pop music", "target_name": "folk rock", "weight": 2.0, "year": 2017}, {"source": "48", "target": "87", "source_name": "pop music", "target_name": "music hall", "weight": 1.0, "year": 2017}, {"source": "49", "target": "53", "source_name": "music theory", "target_name": "popular music", "weight": 6.0, "year": 2017}, {"source": "49", "target": "54", "source_name": "music theory", "target_name": "american popular music", "weight": 1.0, "year": 2017}, {"source": "49", "target": "55", "source_name": "music theory", "target_name": "rock criticism", "weight": 1.0, "year": 2017}, {"source": "49", "target": "57", "source_name": "music theory", "target_name": "north america", "weight": 2.0, "year": 2017}, {"source": "49", "target": "61", "source_name": "music theory", "target_name": "progressive rock", "weight": 1.0, "year": 2017}, {"source": "49", "target": "69", "source_name": "music theory", "target_name": "classical music", "weight": 1.0, "year": 2017}, {"source": "49", "target": "72", "source_name": "music theory", "target_name": "jimi hendrix", "weight": 1.0, "year": 2017}, {"source": "49", "target": "77", "source_name": "music theory", "target_name": "rock music", "weight": 5.0, "year": 2017}, {"source": "49", "target": "78", "source_name": "music theory", "target_name": "hip hop", "weight": 1.0, "year": 2017}, {"source": "49", "target": "88", "source_name": "music theory", "target_name": "oxford university press", "weight": 2.0, "year": 2017}, {"source": "49", "target": "89", "source_name": "music theory", "target_name": "electronic music", "weight": 1.0, "year": 2017}, {"source": "50", "target": "53", "source_name": "hollywood film", "target_name": "popular music", "weight": 1.0, "year": 2017}, {"source": "50", "target": "60", "source_name": "hollywood film", "target_name": "cultural studies", "weight": 1.0, "year": 2017}, {"source": "50", "target": "79", "source_name": "hollywood film", "target_name": "popular culture", "weight": 1.0, "year": 2017}, {"source": "50", "target": "81", "source_name": "hollywood film", "target_name": "avant garde", "weight": 1.0, "year": 2017}, {"source": "50", "target": "88", "source_name": "hollywood film", "target_name": "oxford university press", "weight": 1.0, "year": 2017}, {"source": "51", "target": "52", "source_name": "cultural identity", "target_name": "folk song", "weight": 1.0, "year": 2017}, {"source": "51", "target": "53", "source_name": "cultural identity", "target_name": "popular music", "weight": 3.0, "year": 2017}, {"source": "51", "target": "60", "source_name": "cultural identity", "target_name": "cultural studies", "weight": 2.0, "year": 2017}, {"source": "51", "target": "65", "source_name": "cultural identity", "target_name": "country music", "weight": 1.0, "year": 2017}, {"source": "51", "target": "66", "source_name": "cultural identity", "target_name": "hong kong", "weight": 1.0, "year": 2017}, {"source": "51", "target": "72", "source_name": "cultural identity", "target_name": "jimi hendrix", "weight": 2.0, "year": 2017}, {"source": "51", "target": "74", "source_name": "cultural identity", "target_name": "united states", "weight": 2.0, "year": 2017}, {"source": "51", "target": "77", "source_name": "cultural identity", "target_name": "rock music", "weight": 7.0, "year": 2017}, {"source": "51", "target": "79", "source_name": "cultural identity", "target_name": "popular culture", "weight": 2.0, "year": 2017}, {"source": "51", "target": "80", "source_name": "cultural identity", "target_name": "folk music", "weight": 1.0, "year": 2017}, {"source": "51", "target": "82", "source_name": "cultural identity", "target_name": "heavy metal", "weight": 1.0, "year": 2017}, {"source": "52", "target": "53", "source_name": "folk song", "target_name": "popular music", "weight": 10.0, "year": 2017}, {"source": "52", "target": "54", "source_name": "folk song", "target_name": "american popular music", "weight": 2.0, "year": 2017}, {"source": "52", "target": "65", "source_name": "folk song", "target_name": "country music", "weight": 2.0, "year": 2017}, {"source": "52", "target": "66", "source_name": "folk song", "target_name": "hong kong", "weight": 1.0, "year": 2017}, {"source": "52", "target": "69", "source_name": "folk song", "target_name": "classical music", "weight": 2.0, "year": 2017}, {"source": "52", "target": "74", "source_name": "folk song", "target_name": "united states", "weight": 1.0, "year": 2017}, {"source": "52", "target": "77", "source_name": "folk song", "target_name": "rock music", "weight": 4.0, "year": 2017}, {"source": "52", "target": "80", "source_name": "folk song", "target_name": "folk music", "weight": 9.0, "year": 2017}, {"source": "52", "target": "87", "source_name": "folk song", "target_name": "music hall", "weight": 1.0, "year": 2017}, {"source": "52", "target": "89", "source_name": "folk song", "target_name": "electronic music", "weight": 1.0, "year": 2017}, {"source": "53", "target": "54", "source_name": "popular music", "target_name": "american popular music", "weight": 20.0, "year": 2017}, {"source": "53", "target": "55", "source_name": "popular music", "target_name": "rock criticism", "weight": 7.0, "year": 2017}, {"source": "53", "target": "56", "source_name": "popular music", "target_name": "bruce springsteen", "weight": 2.0, "year": 2017}, {"source": "53", "target": "57", "source_name": "popular music", "target_name": "north america", "weight": 9.0, "year": 2017}, {"source": "53", "target": "58", "source_name": "popular music", "target_name": "music therapy", "weight": 1.0, "year": 2017}, {"source": "53", "target": "59", "source_name": "popular music", "target_name": "college students", "weight": 3.0, "year": 2017}, {"source": "53", "target": "60", "source_name": "popular music", "target_name": "cultural studies", "weight": 9.0, "year": 2017}, {"source": "53", "target": "61", "source_name": "popular music", "target_name": "progressive rock", "weight": 14.0, "year": 2017}, {"source": "53", "target": "62", "source_name": "popular music", "target_name": "led zeppelin", "weight": 3.0, "year": 2017}, {"source": "53", "target": "64", "source_name": "popular music", "target_name": "english language", "weight": 2.0, "year": 2017}, {"source": "53", "target": "65", "source_name": "popular music", "target_name": "country music", "weight": 11.0, "year": 2017}, {"source": "53", "target": "66", "source_name": "popular music", "target_name": "hong kong", "weight": 4.0, "year": 2017}, {"source": "53", "target": "67", "source_name": "popular music", "target_name": "rock art", "weight": 9.0, "year": 2017}, {"source": "53", "target": "69", "source_name": "popular music", "target_name": "classical music", "weight": 19.0, "year": 2017}, {"source": "53", "target": "70", "source_name": "popular music", "target_name": "world war", "weight": 6.0, "year": 2017}, {"source": "53", "target": "71", "source_name": "popular music", "target_name": "latin american", "weight": 3.0, "year": 2017}, {"source": "53", "target": "72", "source_name": "popular music", "target_name": "jimi hendrix", "weight": 5.0, "year": 2017}, {"source": "53", "target": "73", "source_name": "popular music", "target_name": "southern rock", "weight": 2.0, "year": 2017}, {"source": "53", "target": "74", "source_name": "popular music", "target_name": "united states", "weight": 23.0, "year": 2017}, {"source": "53", "target": "75", "source_name": "popular music", "target_name": "world war ii", "weight": 4.0, "year": 2017}, {"source": "53", "target": "76", "source_name": "popular music", "target_name": "los angeles", "weight": 6.0, "year": 2017}, {"source": "53", "target": "77", "source_name": "popular music", "target_name": "rock music", "weight": 148.0, "year": 2017}, {"source": "53", "target": "78", "source_name": "popular music", "target_name": "hip hop", "weight": 12.0, "year": 2017}, {"source": "53", "target": "79", "source_name": "popular music", "target_name": "popular culture", "weight": 27.0, "year": 2017}, {"source": "53", "target": "80", "source_name": "popular music", "target_name": "folk music", "weight": 21.0, "year": 2017}, {"source": "53", "target": "82", "source_name": "popular music", "target_name": "heavy metal", "weight": 15.0, "year": 2017}, {"source": "53", "target": "83", "source_name": "popular music", "target_name": "folk rock", "weight": 3.0, "year": 2017}, {"source": "53", "target": "85", "source_name": "popular music", "target_name": "jewish music", "weight": 2.0, "year": 2017}, {"source": "53", "target": "87", "source_name": "popular music", "target_name": "music hall", "weight": 5.0, "year": 2017}, {"source": "53", "target": "88", "source_name": "popular music", "target_name": "oxford university press", "weight": 4.0, "year": 2017}, {"source": "53", "target": "89", "source_name": "popular music", "target_name": "electronic music", "weight": 10.0, "year": 2017}, {"source": "53", "target": "90", "source_name": "popular music", "target_name": "blues rock", "weight": 1.0, "year": 2017}, {"source": "54", "target": "55", "source_name": "american popular music", "target_name": "rock criticism", "weight": 1.0, "year": 2017}, {"source": "54", "target": "57", "source_name": "american popular music", "target_name": "north america", "weight": 2.0, "year": 2017}, {"source": "54", "target": "65", "source_name": "american popular music", "target_name": "country music", "weight": 5.0, "year": 2017}, {"source": "54", "target": "69", "source_name": "american popular music", "target_name": "classical music", "weight": 3.0, "year": 2017}, {"source": "54", "target": "70", "source_name": "american popular music", "target_name": "world war", "weight": 1.0, "year": 2017}, {"source": "54", "target": "71", "source_name": "american popular music", "target_name": "latin american", "weight": 1.0, "year": 2017}, {"source": "54", "target": "74", "source_name": "american popular music", "target_name": "united states", "weight": 5.0, "year": 2017}, {"source": "54", "target": "75", "source_name": "american popular music", "target_name": "world war ii", "weight": 1.0, "year": 2017}, {"source": "54", "target": "76", "source_name": "american popular music", "target_name": "los angeles", "weight": 1.0, "year": 2017}, {"source": "54", "target": "77", "source_name": "american popular music", "target_name": "rock music", "weight": 7.0, "year": 2017}, {"source": "54", "target": "78", "source_name": "american popular music", "target_name": "hip hop", "weight": 2.0, "year": 2017}, {"source": "54", "target": "79", "source_name": "american popular music", "target_name": "popular culture", "weight": 1.0, "year": 2017}, {"source": "54", "target": "80", "source_name": "american popular music", "target_name": "folk music", "weight": 1.0, "year": 2017}, {"source": "54", "target": "88", "source_name": "american popular music", "target_name": "oxford university press", "weight": 1.0, "year": 2017}, {"source": "54", "target": "89", "source_name": "american popular music", "target_name": "electronic music", "weight": 1.0, "year": 2017}, {"source": "55", "target": "56", "source_name": "rock criticism", "target_name": "bruce springsteen", "weight": 1.0, "year": 2017}, {"source": "55", "target": "57", "source_name": "rock criticism", "target_name": "north america", "weight": 1.0, "year": 2017}, {"source": "55", "target": "61", "source_name": "rock criticism", "target_name": "progressive rock", "weight": 3.0, "year": 2017}, {"source": "55", "target": "62", "source_name": "rock criticism", "target_name": "led zeppelin", "weight": 1.0, "year": 2017}, {"source": "55", "target": "65", "source_name": "rock criticism", "target_name": "country music", "weight": 1.0, "year": 2017}, {"source": "55", "target": "69", "source_name": "rock criticism", "target_name": "classical music", "weight": 1.0, "year": 2017}, {"source": "55", "target": "74", "source_name": "rock criticism", "target_name": "united states", "weight": 2.0, "year": 2017}, {"source": "55", "target": "77", "source_name": "rock criticism", "target_name": "rock music", "weight": 5.0, "year": 2017}, {"source": "55", "target": "78", "source_name": "rock criticism", "target_name": "hip hop", "weight": 1.0, "year": 2017}, {"source": "55", "target": "79", "source_name": "rock criticism", "target_name": "popular culture", "weight": 1.0, "year": 2017}, {"source": "55", "target": "82", "source_name": "rock criticism", "target_name": "heavy metal", "weight": 1.0, "year": 2017}, {"source": "55", "target": "88", "source_name": "rock criticism", "target_name": "oxford university press", "weight": 1.0, "year": 2017}, {"source": "56", "target": "72", "source_name": "bruce springsteen", "target_name": "jimi hendrix", "weight": 1.0, "year": 2017}, {"source": "56", "target": "77", "source_name": "bruce springsteen", "target_name": "rock music", "weight": 2.0, "year": 2017}, {"source": "56", "target": "78", "source_name": "bruce springsteen", "target_name": "hip hop", "weight": 1.0, "year": 2017}, {"source": "56", "target": "79", "source_name": "bruce springsteen", "target_name": "popular culture", "weight": 2.0, "year": 2017}, {"source": "56", "target": "82", "source_name": "bruce springsteen", "target_name": "heavy metal", "weight": 1.0, "year": 2017}, {"source": "57", "target": "61", "source_name": "north america", "target_name": "progressive rock", "weight": 1.0, "year": 2017}, {"source": "57", "target": "65", "source_name": "north america", "target_name": "country music", "weight": 2.0, "year": 2017}, {"source": "57", "target": "71", "source_name": "north america", "target_name": "latin american", "weight": 1.0, "year": 2017}, {"source": "57", "target": "73", "source_name": "north america", "target_name": "southern rock", "weight": 1.0, "year": 2017}, {"source": "57", "target": "74", "source_name": "north america", "target_name": "united states", "weight": 3.0, "year": 2017}, {"source": "57", "target": "77", "source_name": "north america", "target_name": "rock music", "weight": 7.0, "year": 2017}, {"source": "57", "target": "78", "source_name": "north america", "target_name": "hip hop", "weight": 1.0, "year": 2017}, {"source": "57", "target": "80", "source_name": "north america", "target_name": "folk music", "weight": 2.0, "year": 2017}, {"source": "57", "target": "82", "source_name": "north america", "target_name": "heavy metal", "weight": 1.0, "year": 2017}, {"source": "58", "target": "64", "source_name": "music therapy", "target_name": "english language", "weight": 1.0, "year": 2017}, {"source": "58", "target": "74", "source_name": "music therapy", "target_name": "united states", "weight": 1.0, "year": 2017}, {"source": "58", "target": "77", "source_name": "music therapy", "target_name": "rock music", "weight": 3.0, "year": 2017}, {"source": "59", "target": "69", "source_name": "college students", "target_name": "classical music", "weight": 1.0, "year": 2017}, {"source": "59", "target": "74", "source_name": "college students", "target_name": "united states", "weight": 1.0, "year": 2017}, {"source": "59", "target": "77", "source_name": "college students", "target_name": "rock music", "weight": 5.0, "year": 2017}, {"source": "59", "target": "82", "source_name": "college students", "target_name": "heavy metal", "weight": 2.0, "year": 2017}, {"source": "60", "target": "61", "source_name": "cultural studies", "target_name": "progressive rock", "weight": 1.0, "year": 2017}, {"source": "60", "target": "62", "source_name": "cultural studies", "target_name": "led zeppelin", "weight": 1.0, "year": 2017}, {"source": "60", "target": "71", "source_name": "cultural studies", "target_name": "latin american", "weight": 1.0, "year": 2017}, {"source": "60", "target": "74", "source_name": "cultural studies", "target_name": "united states", "weight": 1.0, "year": 2017}, {"source": "60", "target": "76", "source_name": "cultural studies", "target_name": "los angeles", "weight": 1.0, "year": 2017}, {"source": "60", "target": "77", "source_name": "cultural studies", "target_name": "rock music", "weight": 8.0, "year": 2017}, {"source": "60", "target": "79", "source_name": "cultural studies", "target_name": "popular culture", "weight": 6.0, "year": 2017}, {"source": "60", "target": "80", "source_name": "cultural studies", "target_name": "folk music", "weight": 2.0, "year": 2017}, {"source": "60", "target": "81", "source_name": "cultural studies", "target_name": "avant garde", "weight": 1.0, "year": 2017}, {"source": "60", "target": "85", "source_name": "cultural studies", "target_name": "jewish music", "weight": 1.0, "year": 2017}, {"source": "60", "target": "87", "source_name": "cultural studies", "target_name": "music hall", "weight": 1.0, "year": 2017}, {"source": "60", "target": "88", "source_name": "cultural studies", "target_name": "oxford university press", "weight": 4.0, "year": 2017}, {"source": "60", "target": "89", "source_name": "cultural studies", "target_name": "electronic music", "weight": 1.0, "year": 2017}, {"source": "61", "target": "62", "source_name": "progressive rock", "target_name": "led zeppelin", "weight": 1.0, "year": 2017}, {"source": "61", "target": "69", "source_name": "progressive rock", "target_name": "classical music", "weight": 3.0, "year": 2017}, {"source": "61", "target": "72", "source_name": "progressive rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2017}, {"source": "61", "target": "74", "source_name": "progressive rock", "target_name": "united states", "weight": 3.0, "year": 2017}, {"source": "61", "target": "77", "source_name": "progressive rock", "target_name": "rock music", "weight": 24.0, "year": 2017}, {"source": "61", "target": "80", "source_name": "progressive rock", "target_name": "folk music", "weight": 3.0, "year": 2017}, {"source": "61", "target": "82", "source_name": "progressive rock", "target_name": "heavy metal", "weight": 3.0, "year": 2017}, {"source": "61", "target": "83", "source_name": "progressive rock", "target_name": "folk rock", "weight": 1.0, "year": 2017}, {"source": "61", "target": "88", "source_name": "progressive rock", "target_name": "oxford university press", "weight": 1.0, "year": 2017}, {"source": "61", "target": "89", "source_name": "progressive rock", "target_name": "electronic music", "weight": 1.0, "year": 2017}, {"source": "62", "target": "67", "source_name": "led zeppelin", "target_name": "rock art", "weight": 1.0, "year": 2017}, {"source": "62", "target": "69", "source_name": "led zeppelin", "target_name": "classical music", "weight": 2.0, "year": 2017}, {"source": "62", "target": "72", "source_name": "led zeppelin", "target_name": "jimi hendrix", "weight": 2.0, "year": 2017}, {"source": "62", "target": "74", "source_name": "led zeppelin", "target_name": "united states", "weight": 1.0, "year": 2017}, {"source": "62", "target": "77", "source_name": "led zeppelin", "target_name": "rock music", "weight": 4.0, "year": 2017}, {"source": "62", "target": "78", "source_name": "led zeppelin", "target_name": "hip hop", "weight": 1.0, "year": 2017}, {"source": "62", "target": "80", "source_name": "led zeppelin", "target_name": "folk music", "weight": 1.0, "year": 2017}, {"source": "62", "target": "82", "source_name": "led zeppelin", "target_name": "heavy metal", "weight": 2.0, "year": 2017}, {"source": "62", "target": "88", "source_name": "led zeppelin", "target_name": "oxford university press", "weight": 1.0, "year": 2017}, {"source": "64", "target": "66", "source_name": "english language", "target_name": "hong kong", "weight": 1.0, "year": 2017}, {"source": "64", "target": "67", "source_name": "english language", "target_name": "rock art", "weight": 1.0, "year": 2017}, {"source": "64", "target": "70", "source_name": "english language", "target_name": "world war", "weight": 1.0, "year": 2017}, {"source": "64", "target": "74", "source_name": "english language", "target_name": "united states", "weight": 2.0, "year": 2017}, {"source": "64", "target": "77", "source_name": "english language", "target_name": "rock music", "weight": 2.0, "year": 2017}, {"source": "64", "target": "79", "source_name": "english language", "target_name": "popular culture", "weight": 1.0, "year": 2017}, {"source": "64", "target": "83", "source_name": "english language", "target_name": "folk rock", "weight": 1.0, "year": 2017}, {"source": "65", "target": "69", "source_name": "country music", "target_name": "classical music", "weight": 4.0, "year": 2017}, {"source": "65", "target": "72", "source_name": "country music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2017}, {"source": "65", "target": "73", "source_name": "country music", "target_name": "southern rock", "weight": 2.0, "year": 2017}, {"source": "65", "target": "74", "source_name": "country music", "target_name": "united states", "weight": 3.0, "year": 2017}, {"source": "65", "target": "77", "source_name": "country music", "target_name": "rock music", "weight": 5.0, "year": 2017}, {"source": "65", "target": "78", "source_name": "country music", "target_name": "hip hop", "weight": 1.0, "year": 2017}, {"source": "65", "target": "79", "source_name": "country music", "target_name": "popular culture", "weight": 2.0, "year": 2017}, {"source": "65", "target": "80", "source_name": "country music", "target_name": "folk music", "weight": 4.0, "year": 2017}, {"source": "65", "target": "82", "source_name": "country music", "target_name": "heavy metal", "weight": 2.0, "year": 2017}, {"source": "65", "target": "89", "source_name": "country music", "target_name": "electronic music", "weight": 2.0, "year": 2017}, {"source": "66", "target": "67", "source_name": "hong kong", "target_name": "rock art", "weight": 1.0, "year": 2017}, {"source": "66", "target": "77", "source_name": "hong kong", "target_name": "rock music", "weight": 2.0, "year": 2017}, {"source": "66", "target": "78", "source_name": "hong kong", "target_name": "hip hop", "weight": 1.0, "year": 2017}, {"source": "66", "target": "80", "source_name": "hong kong", "target_name": "folk music", "weight": 1.0, "year": 2017}, {"source": "66", "target": "83", "source_name": "hong kong", "target_name": "folk rock", "weight": 1.0, "year": 2017}, {"source": "66", "target": "85", "source_name": "hong kong", "target_name": "jewish music", "weight": 1.0, "year": 2017}, {"source": "67", "target": "69", "source_name": "rock art", "target_name": "classical music", "weight": 1.0, "year": 2017}, {"source": "67", "target": "74", "source_name": "rock art", "target_name": "united states", "weight": 1.0, "year": 2017}, {"source": "67", "target": "77", "source_name": "rock art", "target_name": "rock music", "weight": 9.0, "year": 2017}, {"source": "67", "target": "79", "source_name": "rock art", "target_name": "popular culture", "weight": 1.0, "year": 2017}, {"source": "67", "target": "80", "source_name": "rock art", "target_name": "folk music", "weight": 1.0, "year": 2017}, {"source": "67", "target": "82", "source_name": "rock art", "target_name": "heavy metal", "weight": 1.0, "year": 2017}, {"source": "67", "target": "83", "source_name": "rock art", "target_name": "folk rock", "weight": 1.0, "year": 2017}, {"source": "67", "target": "89", "source_name": "rock art", "target_name": "electronic music", "weight": 1.0, "year": 2017}, {"source": "68", "target": "69", "source_name": "hearing loss", "target_name": "classical music", "weight": 1.0, "year": 2017}, {"source": "68", "target": "77", "source_name": "hearing loss", "target_name": "rock music", "weight": 3.0, "year": 2017}, {"source": "69", "target": "70", "source_name": "classical music", "target_name": "world war", "weight": 2.0, "year": 2017}, {"source": "69", "target": "71", "source_name": "classical music", "target_name": "latin american", "weight": 1.0, "year": 2017}, {"source": "69", "target": "72", "source_name": "classical music", "target_name": "jimi hendrix", "weight": 2.0, "year": 2017}, {"source": "69", "target": "74", "source_name": "classical music", "target_name": "united states", "weight": 6.0, "year": 2017}, {"source": "69", "target": "75", "source_name": "classical music", "target_name": "world war ii", "weight": 1.0, "year": 2017}, {"source": "69", "target": "76", "source_name": "classical music", "target_name": "los angeles", "weight": 1.0, "year": 2017}, {"source": "69", "target": "77", "source_name": "classical music", "target_name": "rock music", "weight": 41.0, "year": 2017}, {"source": "69", "target": "78", "source_name": "classical music", "target_name": "hip hop", "weight": 2.0, "year": 2017}, {"source": "69", "target": "79", "source_name": "classical music", "target_name": "popular culture", "weight": 4.0, "year": 2017}, {"source": "69", "target": "80", "source_name": "classical music", "target_name": "folk music", "weight": 5.0, "year": 2017}, {"source": "69", "target": "82", "source_name": "classical music", "target_name": "heavy metal", "weight": 3.0, "year": 2017}, {"source": "69", "target": "87", "source_name": "classical music", "target_name": "music hall", "weight": 2.0, "year": 2017}, {"source": "69", "target": "88", "source_name": "classical music", "target_name": "oxford university press", "weight": 1.0, "year": 2017}, {"source": "69", "target": "89", "source_name": "classical music", "target_name": "electronic music", "weight": 3.0, "year": 2017}, {"source": "70", "target": "74", "source_name": "world war", "target_name": "united states", "weight": 2.0, "year": 2017}, {"source": "70", "target": "75", "source_name": "world war", "target_name": "world war ii", "weight": 6.0, "year": 2017}, {"source": "70", "target": "77", "source_name": "world war", "target_name": "rock music", "weight": 6.0, "year": 2017}, {"source": "70", "target": "79", "source_name": "world war", "target_name": "popular culture", "weight": 1.0, "year": 2017}, {"source": "70", "target": "80", "source_name": "world war", "target_name": "folk music", "weight": 1.0, "year": 2017}, {"source": "70", "target": "87", "source_name": "world war", "target_name": "music hall", "weight": 1.0, "year": 2017}, {"source": "70", "target": "89", "source_name": "world war", "target_name": "electronic music", "weight": 1.0, "year": 2017}, {"source": "71", "target": "74", "source_name": "latin american", "target_name": "united states", "weight": 4.0, "year": 2017}, {"source": "71", "target": "76", "source_name": "latin american", "target_name": "los angeles", "weight": 2.0, "year": 2017}, {"source": "71", "target": "77", "source_name": "latin american", "target_name": "rock music", "weight": 5.0, "year": 2017}, {"source": "71", "target": "79", "source_name": "latin american", "target_name": "popular culture", "weight": 1.0, "year": 2017}, {"source": "72", "target": "74", "source_name": "jimi hendrix", "target_name": "united states", "weight": 2.0, "year": 2017}, {"source": "72", "target": "77", "source_name": "jimi hendrix", "target_name": "rock music", "weight": 8.0, "year": 2017}, {"source": "72", "target": "79", "source_name": "jimi hendrix", "target_name": "popular culture", "weight": 2.0, "year": 2017}, {"source": "72", "target": "80", "source_name": "jimi hendrix", "target_name": "folk music", "weight": 1.0, "year": 2017}, {"source": "72", "target": "89", "source_name": "jimi hendrix", "target_name": "electronic music", "weight": 1.0, "year": 2017}, {"source": "73", "target": "77", "source_name": "southern rock", "target_name": "rock music", "weight": 1.0, "year": 2017}, {"source": "73", "target": "80", "source_name": "southern rock", "target_name": "folk music", "weight": 1.0, "year": 2017}, {"source": "74", "target": "76", "source_name": "united states", "target_name": "los angeles", "weight": 1.0, "year": 2017}, {"source": "74", "target": "77", "source_name": "united states", "target_name": "rock music", "weight": 17.0, "year": 2017}, {"source": "74", "target": "78", "source_name": "united states", "target_name": "hip hop", "weight": 1.0, "year": 2017}, {"source": "74", "target": "79", "source_name": "united states", "target_name": "popular culture", "weight": 3.0, "year": 2017}, {"source": "74", "target": "80", "source_name": "united states", "target_name": "folk music", "weight": 4.0, "year": 2017}, {"source": "74", "target": "88", "source_name": "united states", "target_name": "oxford university press", "weight": 1.0, "year": 2017}, {"source": "74", "target": "89", "source_name": "united states", "target_name": "electronic music", "weight": 3.0, "year": 2017}, {"source": "75", "target": "76", "source_name": "world war ii", "target_name": "los angeles", "weight": 1.0, "year": 2017}, {"source": "75", "target": "77", "source_name": "world war ii", "target_name": "rock music", "weight": 3.0, "year": 2017}, {"source": "75", "target": "80", "source_name": "world war ii", "target_name": "folk music", "weight": 1.0, "year": 2017}, {"source": "76", "target": "77", "source_name": "los angeles", "target_name": "rock music", "weight": 8.0, "year": 2017}, {"source": "76", "target": "79", "source_name": "los angeles", "target_name": "popular culture", "weight": 1.0, "year": 2017}, {"source": "76", "target": "80", "source_name": "los angeles", "target_name": "folk music", "weight": 2.0, "year": 2017}, {"source": "77", "target": "78", "source_name": "rock music", "target_name": "hip hop", "weight": 5.0, "year": 2017}, {"source": "77", "target": "79", "source_name": "rock music", "target_name": "popular culture", "weight": 24.0, "year": 2017}, {"source": "77", "target": "80", "source_name": "rock music", "target_name": "folk music", "weight": 15.0, "year": 2017}, {"source": "77", "target": "82", "source_name": "rock music", "target_name": "heavy metal", "weight": 18.0, "year": 2017}, {"source": "77", "target": "83", "source_name": "rock music", "target_name": "folk rock", "weight": 3.0, "year": 2017}, {"source": "77", "target": "87", "source_name": "rock music", "target_name": "music hall", "weight": 5.0, "year": 2017}, {"source": "77", "target": "88", "source_name": "rock music", "target_name": "oxford university press", "weight": 2.0, "year": 2017}, {"source": "77", "target": "89", "source_name": "rock music", "target_name": "electronic music", "weight": 6.0, "year": 2017}, {"source": "77", "target": "90", "source_name": "rock music", "target_name": "blues rock", "weight": 1.0, "year": 2017}, {"source": "78", "target": "79", "source_name": "hip hop", "target_name": "popular culture", "weight": 2.0, "year": 2017}, {"source": "78", "target": "80", "source_name": "hip hop", "target_name": "folk music", "weight": 3.0, "year": 2017}, {"source": "78", "target": "82", "source_name": "hip hop", "target_name": "heavy metal", "weight": 2.0, "year": 2017}, {"source": "78", "target": "85", "source_name": "hip hop", "target_name": "jewish music", "weight": 1.0, "year": 2017}, {"source": "78", "target": "88", "source_name": "hip hop", "target_name": "oxford university press", "weight": 1.0, "year": 2017}, {"source": "78", "target": "89", "source_name": "hip hop", "target_name": "electronic music", "weight": 1.0, "year": 2017}, {"source": "78", "target": "90", "source_name": "hip hop", "target_name": "blues rock", "weight": 1.0, "year": 2017}, {"source": "79", "target": "80", "source_name": "popular culture", "target_name": "folk music", "weight": 3.0, "year": 2017}, {"source": "79", "target": "82", "source_name": "popular culture", "target_name": "heavy metal", "weight": 3.0, "year": 2017}, {"source": "79", "target": "85", "source_name": "popular culture", "target_name": "jewish music", "weight": 1.0, "year": 2017}, {"source": "79", "target": "87", "source_name": "popular culture", "target_name": "music hall", "weight": 3.0, "year": 2017}, {"source": "79", "target": "88", "source_name": "popular culture", "target_name": "oxford university press", "weight": 1.0, "year": 2017}, {"source": "79", "target": "89", "source_name": "popular culture", "target_name": "electronic music", "weight": 1.0, "year": 2017}, {"source": "80", "target": "82", "source_name": "folk music", "target_name": "heavy metal", "weight": 1.0, "year": 2017}, {"source": "80", "target": "85", "source_name": "folk music", "target_name": "jewish music", "weight": 2.0, "year": 2017}, {"source": "80", "target": "87", "source_name": "folk music", "target_name": "music hall", "weight": 3.0, "year": 2017}, {"source": "80", "target": "88", "source_name": "folk music", "target_name": "oxford university press", "weight": 1.0, "year": 2017}, {"source": "80", "target": "89", "source_name": "folk music", "target_name": "electronic music", "weight": 3.0, "year": 2017}, {"source": "81", "target": "88", "source_name": "avant garde", "target_name": "oxford university press", "weight": 1.0, "year": 2017}, {"source": "82", "target": "83", "source_name": "heavy metal", "target_name": "folk rock", "weight": 2.0, "year": 2017}, {"source": "85", "target": "88", "source_name": "jewish music", "target_name": "oxford university press", "weight": 1.0, "year": 2017}, {"source": "88", "target": "89", "source_name": "oxford university press", "target_name": "electronic music", "weight": 1.0, "year": 2017}]}, {"2018": [{"source": "1", "target": "6", "source_name": "rock star", "target_name": "elvis presley", "weight": 1.0, "year": 2018}, {"source": "1", "target": "7", "source_name": "rock star", "target_name": "nineteenth century", "weight": 1.0, "year": 2018}, {"source": "1", "target": "9", "source_name": "rock star", "target_name": "compact disc", "weight": 1.0, "year": 2018}, {"source": "1", "target": "16", "source_name": "rock star", "target_name": "bob dylan", "weight": 1.0, "year": 2018}, {"source": "1", "target": "19", "source_name": "rock star", "target_name": "music video", "weight": 1.0, "year": 2018}, {"source": "1", "target": "23", "source_name": "rock star", "target_name": "electronic dance music", "weight": 1.0, "year": 2018}, {"source": "1", "target": "24", "source_name": "rock star", "target_name": "punk rock", "weight": 1.0, "year": 2018}, {"source": "1", "target": "28", "source_name": "rock star", "target_name": "high school", "weight": 1.0, "year": 2018}, {"source": "1", "target": "29", "source_name": "rock star", "target_name": "rolling stone", "weight": 2.0, "year": 2018}, {"source": "1", "target": "36", "source_name": "rock star", "target_name": "music industry", "weight": 4.0, "year": 2018}, {"source": "1", "target": "41", "source_name": "rock star", "target_name": "youth culture", "weight": 2.0, "year": 2018}, {"source": "1", "target": "42", "source_name": "rock star", "target_name": "simon frith", "weight": 1.0, "year": 2018}, {"source": "1", "target": "48", "source_name": "rock star", "target_name": "pop music", "weight": 4.0, "year": 2018}, {"source": "1", "target": "51", "source_name": "rock star", "target_name": "cultural identity", "weight": 2.0, "year": 2018}, {"source": "1", "target": "53", "source_name": "rock star", "target_name": "popular music", "weight": 7.0, "year": 2018}, {"source": "1", "target": "56", "source_name": "rock star", "target_name": "bruce springsteen", "weight": 1.0, "year": 2018}, {"source": "1", "target": "57", "source_name": "rock star", "target_name": "north america", "weight": 1.0, "year": 2018}, {"source": "1", "target": "60", "source_name": "rock star", "target_name": "cultural studies", "weight": 1.0, "year": 2018}, {"source": "1", "target": "67", "source_name": "rock star", "target_name": "rock art", "weight": 1.0, "year": 2018}, {"source": "1", "target": "69", "source_name": "rock star", "target_name": "classical music", "weight": 1.0, "year": 2018}, {"source": "1", "target": "74", "source_name": "rock star", "target_name": "united states", "weight": 1.0, "year": 2018}, {"source": "1", "target": "77", "source_name": "rock star", "target_name": "rock music", "weight": 11.0, "year": 2018}, {"source": "1", "target": "79", "source_name": "rock star", "target_name": "popular culture", "weight": 2.0, "year": 2018}, {"source": "1", "target": "82", "source_name": "rock star", "target_name": "heavy metal", "weight": 3.0, "year": 2018}, {"source": "2", "target": "3", "source_name": "indie rock", "target_name": "glam rock", "weight": 1.0, "year": 2018}, {"source": "2", "target": "19", "source_name": "indie rock", "target_name": "music video", "weight": 1.0, "year": 2018}, {"source": "2", "target": "20", "source_name": "indie rock", "target_name": "garage rock", "weight": 1.0, "year": 2018}, {"source": "2", "target": "24", "source_name": "indie rock", "target_name": "punk rock", "weight": 1.0, "year": 2018}, {"source": "2", "target": "27", "source_name": "indie rock", "target_name": "pop rock", "weight": 1.0, "year": 2018}, {"source": "2", "target": "30", "source_name": "indie rock", "target_name": "rock band", "weight": 2.0, "year": 2018}, {"source": "2", "target": "36", "source_name": "indie rock", "target_name": "music industry", "weight": 1.0, "year": 2018}, {"source": "2", "target": "44", "source_name": "indie rock", "target_name": "alternative rock", "weight": 1.0, "year": 2018}, {"source": "2", "target": "47", "source_name": "indie rock", "target_name": "hard rock", "weight": 1.0, "year": 2018}, {"source": "2", "target": "48", "source_name": "indie rock", "target_name": "pop music", "weight": 2.0, "year": 2018}, {"source": "2", "target": "51", "source_name": "indie rock", "target_name": "cultural identity", "weight": 1.0, "year": 2018}, {"source": "2", "target": "53", "source_name": "indie rock", "target_name": "popular music", "weight": 2.0, "year": 2018}, {"source": "2", "target": "67", "source_name": "indie rock", "target_name": "rock art", "weight": 2.0, "year": 2018}, {"source": "2", "target": "69", "source_name": "indie rock", "target_name": "classical music", "weight": 1.0, "year": 2018}, {"source": "2", "target": "72", "source_name": "indie rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2018}, {"source": "2", "target": "74", "source_name": "indie rock", "target_name": "united states", "weight": 1.0, "year": 2018}, {"source": "2", "target": "77", "source_name": "indie rock", "target_name": "rock music", "weight": 6.0, "year": 2018}, {"source": "2", "target": "78", "source_name": "indie rock", "target_name": "hip hop", "weight": 1.0, "year": 2018}, {"source": "2", "target": "80", "source_name": "indie rock", "target_name": "folk music", "weight": 1.0, "year": 2018}, {"source": "3", "target": "20", "source_name": "glam rock", "target_name": "garage rock", "weight": 2.0, "year": 2018}, {"source": "3", "target": "24", "source_name": "glam rock", "target_name": "punk rock", "weight": 2.0, "year": 2018}, {"source": "3", "target": "27", "source_name": "glam rock", "target_name": "pop rock", "weight": 1.0, "year": 2018}, {"source": "3", "target": "41", "source_name": "glam rock", "target_name": "youth culture", "weight": 1.0, "year": 2018}, {"source": "3", "target": "44", "source_name": "glam rock", "target_name": "alternative rock", "weight": 1.0, "year": 2018}, {"source": "3", "target": "47", "source_name": "glam rock", "target_name": "hard rock", "weight": 1.0, "year": 2018}, {"source": "3", "target": "53", "source_name": "glam rock", "target_name": "popular music", "weight": 1.0, "year": 2018}, {"source": "3", "target": "77", "source_name": "glam rock", "target_name": "rock music", "weight": 3.0, "year": 2018}, {"source": "3", "target": "79", "source_name": "glam rock", "target_name": "popular culture", "weight": 2.0, "year": 2018}, {"source": "3", "target": "87", "source_name": "glam rock", "target_name": "music hall", "weight": 1.0, "year": 2018}, {"source": "4", "target": "7", "source_name": "gregorian chant", "target_name": "nineteenth century", "weight": 1.0, "year": 2018}, {"source": "4", "target": "9", "source_name": "gregorian chant", "target_name": "compact disc", "weight": 1.0, "year": 2018}, {"source": "4", "target": "10", "source_name": "gregorian chant", "target_name": "african american", "weight": 1.0, "year": 2018}, {"source": "4", "target": "19", "source_name": "gregorian chant", "target_name": "music video", "weight": 1.0, "year": 2018}, {"source": "4", "target": "22", "source_name": "gregorian chant", "target_name": "chamber music", "weight": 1.0, "year": 2018}, {"source": "4", "target": "36", "source_name": "gregorian chant", "target_name": "music industry", "weight": 1.0, "year": 2018}, {"source": "4", "target": "37", "source_name": "gregorian chant", "target_name": "middle ages", "weight": 1.0, "year": 2018}, {"source": "4", "target": "38", "source_name": "gregorian chant", "target_name": "summary additional listening", "weight": 1.0, "year": 2018}, {"source": "4", "target": "40", "source_name": "gregorian chant", "target_name": "musical instruments", "weight": 1.0, "year": 2018}, {"source": "4", "target": "48", "source_name": "gregorian chant", "target_name": "pop music", "weight": 1.0, "year": 2018}, {"source": "4", "target": "52", "source_name": "gregorian chant", "target_name": "folk song", "weight": 1.0, "year": 2018}, {"source": "4", "target": "53", "source_name": "gregorian chant", "target_name": "popular music", "weight": 1.0, "year": 2018}, {"source": "4", "target": "54", "source_name": "gregorian chant", "target_name": "american popular music", "weight": 1.0, "year": 2018}, {"source": "4", "target": "65", "source_name": "gregorian chant", "target_name": "country music", "weight": 1.0, "year": 2018}, {"source": "4", "target": "69", "source_name": "gregorian chant", "target_name": "classical music", "weight": 1.0, "year": 2018}, {"source": "4", "target": "74", "source_name": "gregorian chant", "target_name": "united states", "weight": 1.0, "year": 2018}, {"source": "4", "target": "80", "source_name": "gregorian chant", "target_name": "folk music", "weight": 1.0, "year": 2018}, {"source": "4", "target": "89", "source_name": "gregorian chant", "target_name": "electronic music", "weight": 1.0, "year": 2018}, {"source": "5", "target": "12", "source_name": "jesus christ superstar", "target_name": "rock opera", "weight": 3.0, "year": 2018}, {"source": "5", "target": "15", "source_name": "jesus christ superstar", "target_name": "musical theatre", "weight": 3.0, "year": 2018}, {"source": "5", "target": "33", "source_name": "jesus christ superstar", "target_name": "jesus christ", "weight": 5.0, "year": 2018}, {"source": "5", "target": "34", "source_name": "jesus christ superstar", "target_name": "mass media", "weight": 1.0, "year": 2018}, {"source": "5", "target": "41", "source_name": "jesus christ superstar", "target_name": "youth culture", "weight": 1.0, "year": 2018}, {"source": "5", "target": "53", "source_name": "jesus christ superstar", "target_name": "popular music", "weight": 1.0, "year": 2018}, {"source": "5", "target": "77", "source_name": "jesus christ superstar", "target_name": "rock music", "weight": 7.0, "year": 2018}, {"source": "6", "target": "10", "source_name": "elvis presley", "target_name": "african american", "weight": 1.0, "year": 2018}, {"source": "6", "target": "16", "source_name": "elvis presley", "target_name": "bob dylan", "weight": 4.0, "year": 2018}, {"source": "6", "target": "17", "source_name": "elvis presley", "target_name": "civil rights", "weight": 1.0, "year": 2018}, {"source": "6", "target": "23", "source_name": "elvis presley", "target_name": "electronic dance music", "weight": 1.0, "year": 2018}, {"source": "6", "target": "29", "source_name": "elvis presley", "target_name": "rolling stone", "weight": 2.0, "year": 2018}, {"source": "6", "target": "36", "source_name": "elvis presley", "target_name": "music industry", "weight": 3.0, "year": 2018}, {"source": "6", "target": "40", "source_name": "elvis presley", "target_name": "musical instruments", "weight": 1.0, "year": 2018}, {"source": "6", "target": "41", "source_name": "elvis presley", "target_name": "youth culture", "weight": 1.0, "year": 2018}, {"source": "6", "target": "42", "source_name": "elvis presley", "target_name": "simon frith", "weight": 2.0, "year": 2018}, {"source": "6", "target": "47", "source_name": "elvis presley", "target_name": "hard rock", "weight": 1.0, "year": 2018}, {"source": "6", "target": "48", "source_name": "elvis presley", "target_name": "pop music", "weight": 1.0, "year": 2018}, {"source": "6", "target": "49", "source_name": "elvis presley", "target_name": "music theory", "weight": 1.0, "year": 2018}, {"source": "6", "target": "51", "source_name": "elvis presley", "target_name": "cultural identity", "weight": 1.0, "year": 2018}, {"source": "6", "target": "53", "source_name": "elvis presley", "target_name": "popular music", "weight": 9.0, "year": 2018}, {"source": "6", "target": "54", "source_name": "elvis presley", "target_name": "american popular music", "weight": 3.0, "year": 2018}, {"source": "6", "target": "56", "source_name": "elvis presley", "target_name": "bruce springsteen", "weight": 2.0, "year": 2018}, {"source": "6", "target": "60", "source_name": "elvis presley", "target_name": "cultural studies", "weight": 1.0, "year": 2018}, {"source": "6", "target": "67", "source_name": "elvis presley", "target_name": "rock art", "weight": 1.0, "year": 2018}, {"source": "6", "target": "70", "source_name": "elvis presley", "target_name": "world war", "weight": 1.0, "year": 2018}, {"source": "6", "target": "72", "source_name": "elvis presley", "target_name": "jimi hendrix", "weight": 1.0, "year": 2018}, {"source": "6", "target": "74", "source_name": "elvis presley", "target_name": "united states", "weight": 2.0, "year": 2018}, {"source": "6", "target": "75", "source_name": "elvis presley", "target_name": "world war ii", "weight": 1.0, "year": 2018}, {"source": "6", "target": "77", "source_name": "elvis presley", "target_name": "rock music", "weight": 5.0, "year": 2018}, {"source": "6", "target": "78", "source_name": "elvis presley", "target_name": "hip hop", "weight": 1.0, "year": 2018}, {"source": "6", "target": "79", "source_name": "elvis presley", "target_name": "popular culture", "weight": 2.0, "year": 2018}, {"source": "6", "target": "80", "source_name": "elvis presley", "target_name": "folk music", "weight": 1.0, "year": 2018}, {"source": "6", "target": "82", "source_name": "elvis presley", "target_name": "heavy metal", "weight": 1.0, "year": 2018}, {"source": "7", "target": "9", "source_name": "nineteenth century", "target_name": "compact disc", "weight": 1.0, "year": 2018}, {"source": "7", "target": "10", "source_name": "nineteenth century", "target_name": "african american", "weight": 1.0, "year": 2018}, {"source": "7", "target": "19", "source_name": "nineteenth century", "target_name": "music video", "weight": 1.0, "year": 2018}, {"source": "7", "target": "22", "source_name": "nineteenth century", "target_name": "chamber music", "weight": 1.0, "year": 2018}, {"source": "7", "target": "34", "source_name": "nineteenth century", "target_name": "mass media", "weight": 1.0, "year": 2018}, {"source": "7", "target": "36", "source_name": "nineteenth century", "target_name": "music industry", "weight": 2.0, "year": 2018}, {"source": "7", "target": "38", "source_name": "nineteenth century", "target_name": "summary additional listening", "weight": 1.0, "year": 2018}, {"source": "7", "target": "40", "source_name": "nineteenth century", "target_name": "musical instruments", "weight": 1.0, "year": 2018}, {"source": "7", "target": "43", "source_name": "nineteenth century", "target_name": "music education", "weight": 1.0, "year": 2018}, {"source": "7", "target": "45", "source_name": "nineteenth century", "target_name": "double bass", "weight": 2.0, "year": 2018}, {"source": "7", "target": "48", "source_name": "nineteenth century", "target_name": "pop music", "weight": 1.0, "year": 2018}, {"source": "7", "target": "49", "source_name": "nineteenth century", "target_name": "music theory", "weight": 1.0, "year": 2018}, {"source": "7", "target": "50", "source_name": "nineteenth century", "target_name": "hollywood film", "weight": 1.0, "year": 2018}, {"source": "7", "target": "52", "source_name": "nineteenth century", "target_name": "folk song", "weight": 3.0, "year": 2018}, {"source": "7", "target": "53", "source_name": "nineteenth century", "target_name": "popular music", "weight": 4.0, "year": 2018}, {"source": "7", "target": "54", "source_name": "nineteenth century", "target_name": "american popular music", "weight": 1.0, "year": 2018}, {"source": "7", "target": "65", "source_name": "nineteenth century", "target_name": "country music", "weight": 1.0, "year": 2018}, {"source": "7", "target": "67", "source_name": "nineteenth century", "target_name": "rock art", "weight": 1.0, "year": 2018}, {"source": "7", "target": "69", "source_name": "nineteenth century", "target_name": "classical music", "weight": 4.0, "year": 2018}, {"source": "7", "target": "70", "source_name": "nineteenth century", "target_name": "world war", "weight": 2.0, "year": 2018}, {"source": "7", "target": "74", "source_name": "nineteenth century", "target_name": "united states", "weight": 2.0, "year": 2018}, {"source": "7", "target": "77", "source_name": "nineteenth century", "target_name": "rock music", "weight": 4.0, "year": 2018}, {"source": "7", "target": "79", "source_name": "nineteenth century", "target_name": "popular culture", "weight": 1.0, "year": 2018}, {"source": "7", "target": "80", "source_name": "nineteenth century", "target_name": "folk music", "weight": 3.0, "year": 2018}, {"source": "7", "target": "85", "source_name": "nineteenth century", "target_name": "jewish music", "weight": 1.0, "year": 2018}, {"source": "7", "target": "87", "source_name": "nineteenth century", "target_name": "music hall", "weight": 1.0, "year": 2018}, {"source": "7", "target": "89", "source_name": "nineteenth century", "target_name": "electronic music", "weight": 1.0, "year": 2018}, {"source": "8", "target": "20", "source_name": "christian rock", "target_name": "garage rock", "weight": 1.0, "year": 2018}, {"source": "8", "target": "36", "source_name": "christian rock", "target_name": "music industry", "weight": 1.0, "year": 2018}, {"source": "8", "target": "44", "source_name": "christian rock", "target_name": "alternative rock", "weight": 1.0, "year": 2018}, {"source": "8", "target": "53", "source_name": "christian rock", "target_name": "popular music", "weight": 2.0, "year": 2018}, {"source": "8", "target": "57", "source_name": "christian rock", "target_name": "north america", "weight": 1.0, "year": 2018}, {"source": "8", "target": "65", "source_name": "christian rock", "target_name": "country music", "weight": 1.0, "year": 2018}, {"source": "8", "target": "73", "source_name": "christian rock", "target_name": "southern rock", "weight": 1.0, "year": 2018}, {"source": "8", "target": "77", "source_name": "christian rock", "target_name": "rock music", "weight": 2.0, "year": 2018}, {"source": "8", "target": "79", "source_name": "christian rock", "target_name": "popular culture", "weight": 2.0, "year": 2018}, {"source": "8", "target": "80", "source_name": "christian rock", "target_name": "folk music", "weight": 1.0, "year": 2018}, {"source": "9", "target": "10", "source_name": "compact disc", "target_name": "african american", "weight": 1.0, "year": 2018}, {"source": "9", "target": "11", "source_name": "compact disc", "target_name": "south africa", "weight": 1.0, "year": 2018}, {"source": "9", "target": "18", "source_name": "compact disc", "target_name": "middle class", "weight": 1.0, "year": 2018}, {"source": "9", "target": "19", "source_name": "compact disc", "target_name": "music video", "weight": 1.0, "year": 2018}, {"source": "9", "target": "24", "source_name": "compact disc", "target_name": "punk rock", "weight": 1.0, "year": 2018}, {"source": "9", "target": "25", "source_name": "compact disc", "target_name": "russian rock", "weight": 1.0, "year": 2018}, {"source": "9", "target": "28", "source_name": "compact disc", "target_name": "high school", "weight": 1.0, "year": 2018}, {"source": "9", "target": "29", "source_name": "compact disc", "target_name": "rolling stone", "weight": 1.0, "year": 2018}, {"source": "9", "target": "30", "source_name": "compact disc", "target_name": "rock band", "weight": 1.0, "year": 2018}, {"source": "9", "target": "36", "source_name": "compact disc", "target_name": "music industry", "weight": 1.0, "year": 2018}, {"source": "9", "target": "37", "source_name": "compact disc", "target_name": "middle ages", "weight": 1.0, "year": 2018}, {"source": "9", "target": "46", "source_name": "compact disc", "target_name": "music festival", "weight": 1.0, "year": 2018}, {"source": "9", "target": "48", "source_name": "compact disc", "target_name": "pop music", "weight": 1.0, "year": 2018}, {"source": "9", "target": "51", "source_name": "compact disc", "target_name": "cultural identity", "weight": 1.0, "year": 2018}, {"source": "9", "target": "53", "source_name": "compact disc", "target_name": "popular music", "weight": 4.0, "year": 2018}, {"source": "9", "target": "61", "source_name": "compact disc", "target_name": "progressive rock", "weight": 1.0, "year": 2018}, {"source": "9", "target": "66", "source_name": "compact disc", "target_name": "hong kong", "weight": 1.0, "year": 2018}, {"source": "9", "target": "74", "source_name": "compact disc", "target_name": "united states", "weight": 1.0, "year": 2018}, {"source": "9", "target": "77", "source_name": "compact disc", "target_name": "rock music", "weight": 2.0, "year": 2018}, {"source": "9", "target": "78", "source_name": "compact disc", "target_name": "hip hop", "weight": 1.0, "year": 2018}, {"source": "9", "target": "79", "source_name": "compact disc", "target_name": "popular culture", "weight": 1.0, "year": 2018}, {"source": "9", "target": "80", "source_name": "compact disc", "target_name": "folk music", "weight": 3.0, "year": 2018}, {"source": "9", "target": "85", "source_name": "compact disc", "target_name": "jewish music", "weight": 2.0, "year": 2018}, {"source": "9", "target": "89", "source_name": "compact disc", "target_name": "electronic music", "weight": 1.0, "year": 2018}, {"source": "10", "target": "11", "source_name": "african american", "target_name": "south africa", "weight": 1.0, "year": 2018}, {"source": "10", "target": "15", "source_name": "african american", "target_name": "musical theatre", "weight": 1.0, "year": 2018}, {"source": "10", "target": "17", "source_name": "african american", "target_name": "civil rights", "weight": 2.0, "year": 2018}, {"source": "10", "target": "19", "source_name": "african american", "target_name": "music video", "weight": 1.0, "year": 2018}, {"source": "10", "target": "21", "source_name": "african american", "target_name": "social protest", "weight": 1.0, "year": 2018}, {"source": "10", "target": "22", "source_name": "african american", "target_name": "chamber music", "weight": 1.0, "year": 2018}, {"source": "10", "target": "23", "source_name": "african american", "target_name": "electronic dance music", "weight": 1.0, "year": 2018}, {"source": "10", "target": "24", "source_name": "african american", "target_name": "punk rock", "weight": 2.0, "year": 2018}, {"source": "10", "target": "29", "source_name": "african american", "target_name": "rolling stone", "weight": 1.0, "year": 2018}, {"source": "10", "target": "36", "source_name": "african american", "target_name": "music industry", "weight": 3.0, "year": 2018}, {"source": "10", "target": "38", "source_name": "african american", "target_name": "summary additional listening", "weight": 1.0, "year": 2018}, {"source": "10", "target": "40", "source_name": "african american", "target_name": "musical instruments", "weight": 1.0, "year": 2018}, {"source": "10", "target": "52", "source_name": "african american", "target_name": "folk song", "weight": 1.0, "year": 2018}, {"source": "10", "target": "53", "source_name": "african american", "target_name": "popular music", "weight": 7.0, "year": 2018}, {"source": "10", "target": "54", "source_name": "african american", "target_name": "american popular music", "weight": 1.0, "year": 2018}, {"source": "10", "target": "61", "source_name": "african american", "target_name": "progressive rock", "weight": 1.0, "year": 2018}, {"source": "10", "target": "62", "source_name": "african american", "target_name": "led zeppelin", "weight": 1.0, "year": 2018}, {"source": "10", "target": "65", "source_name": "african american", "target_name": "country music", "weight": 1.0, "year": 2018}, {"source": "10", "target": "69", "source_name": "african american", "target_name": "classical music", "weight": 2.0, "year": 2018}, {"source": "10", "target": "72", "source_name": "african american", "target_name": "jimi hendrix", "weight": 1.0, "year": 2018}, {"source": "10", "target": "74", "source_name": "african american", "target_name": "united states", "weight": 6.0, "year": 2018}, {"source": "10", "target": "75", "source_name": "african american", "target_name": "world war ii", "weight": 1.0, "year": 2018}, {"source": "10", "target": "77", "source_name": "african american", "target_name": "rock music", "weight": 2.0, "year": 2018}, {"source": "10", "target": "78", "source_name": "african american", "target_name": "hip hop", "weight": 1.0, "year": 2018}, {"source": "10", "target": "79", "source_name": "african american", "target_name": "popular culture", "weight": 2.0, "year": 2018}, {"source": "10", "target": "80", "source_name": "african american", "target_name": "folk music", "weight": 4.0, "year": 2018}, {"source": "10", "target": "82", "source_name": "african american", "target_name": "heavy metal", "weight": 1.0, "year": 2018}, {"source": "10", "target": "89", "source_name": "african american", "target_name": "electronic music", "weight": 1.0, "year": 2018}, {"source": "11", "target": "17", "source_name": "south africa", "target_name": "civil rights", "weight": 1.0, "year": 2018}, {"source": "11", "target": "21", "source_name": "south africa", "target_name": "social protest", "weight": 2.0, "year": 2018}, {"source": "11", "target": "23", "source_name": "south africa", "target_name": "electronic dance music", "weight": 1.0, "year": 2018}, {"source": "11", "target": "25", "source_name": "south africa", "target_name": "russian rock", "weight": 1.0, "year": 2018}, {"source": "11", "target": "36", "source_name": "south africa", "target_name": "music industry", "weight": 1.0, "year": 2018}, {"source": "11", "target": "43", "source_name": "south africa", "target_name": "music education", "weight": 1.0, "year": 2018}, {"source": "11", "target": "46", "source_name": "south africa", "target_name": "music festival", "weight": 3.0, "year": 2018}, {"source": "11", "target": "53", "source_name": "south africa", "target_name": "popular music", "weight": 5.0, "year": 2018}, {"source": "11", "target": "61", "source_name": "south africa", "target_name": "progressive rock", "weight": 1.0, "year": 2018}, {"source": "11", "target": "66", "source_name": "south africa", "target_name": "hong kong", "weight": 1.0, "year": 2018}, {"source": "11", "target": "74", "source_name": "south africa", "target_name": "united states", "weight": 3.0, "year": 2018}, {"source": "11", "target": "78", "source_name": "south africa", "target_name": "hip hop", "weight": 1.0, "year": 2018}, {"source": "11", "target": "80", "source_name": "south africa", "target_name": "folk music", "weight": 3.0, "year": 2018}, {"source": "11", "target": "85", "source_name": "south africa", "target_name": "jewish music", "weight": 1.0, "year": 2018}, {"source": "11", "target": "87", "source_name": "south africa", "target_name": "music hall", "weight": 1.0, "year": 2018}, {"source": "11", "target": "88", "source_name": "south africa", "target_name": "oxford university press", "weight": 1.0, "year": 2018}, {"source": "12", "target": "15", "source_name": "rock opera", "target_name": "musical theatre", "weight": 3.0, "year": 2018}, {"source": "12", "target": "33", "source_name": "rock opera", "target_name": "jesus christ", "weight": 2.0, "year": 2018}, {"source": "12", "target": "41", "source_name": "rock opera", "target_name": "youth culture", "weight": 2.0, "year": 2018}, {"source": "12", "target": "48", "source_name": "rock opera", "target_name": "pop music", "weight": 1.0, "year": 2018}, {"source": "12", "target": "53", "source_name": "rock opera", "target_name": "popular music", "weight": 1.0, "year": 2018}, {"source": "12", "target": "57", "source_name": "rock opera", "target_name": "north america", "weight": 1.0, "year": 2018}, {"source": "12", "target": "77", "source_name": "rock opera", "target_name": "rock music", "weight": 3.0, "year": 2018}, {"source": "12", "target": "79", "source_name": "rock opera", "target_name": "popular culture", "weight": 1.0, "year": 2018}, {"source": "15", "target": "33", "source_name": "musical theatre", "target_name": "jesus christ", "weight": 3.0, "year": 2018}, {"source": "15", "target": "53", "source_name": "musical theatre", "target_name": "popular music", "weight": 6.0, "year": 2018}, {"source": "15", "target": "54", "source_name": "musical theatre", "target_name": "american popular music", "weight": 3.0, "year": 2018}, {"source": "15", "target": "57", "source_name": "musical theatre", "target_name": "north america", "weight": 2.0, "year": 2018}, {"source": "15", "target": "70", "source_name": "musical theatre", "target_name": "world war", "weight": 1.0, "year": 2018}, {"source": "15", "target": "74", "source_name": "musical theatre", "target_name": "united states", "weight": 1.0, "year": 2018}, {"source": "15", "target": "77", "source_name": "musical theatre", "target_name": "rock music", "weight": 8.0, "year": 2018}, {"source": "15", "target": "87", "source_name": "musical theatre", "target_name": "music hall", "weight": 1.0, "year": 2018}, {"source": "16", "target": "29", "source_name": "bob dylan", "target_name": "rolling stone", "weight": 4.0, "year": 2018}, {"source": "16", "target": "30", "source_name": "bob dylan", "target_name": "rock band", "weight": 2.0, "year": 2018}, {"source": "16", "target": "36", "source_name": "bob dylan", "target_name": "music industry", "weight": 3.0, "year": 2018}, {"source": "16", "target": "42", "source_name": "bob dylan", "target_name": "simon frith", "weight": 1.0, "year": 2018}, {"source": "16", "target": "44", "source_name": "bob dylan", "target_name": "alternative rock", "weight": 1.0, "year": 2018}, {"source": "16", "target": "48", "source_name": "bob dylan", "target_name": "pop music", "weight": 3.0, "year": 2018}, {"source": "16", "target": "52", "source_name": "bob dylan", "target_name": "folk song", "weight": 1.0, "year": 2018}, {"source": "16", "target": "53", "source_name": "bob dylan", "target_name": "popular music", "weight": 10.0, "year": 2018}, {"source": "16", "target": "54", "source_name": "bob dylan", "target_name": "american popular music", "weight": 1.0, "year": 2018}, {"source": "16", "target": "56", "source_name": "bob dylan", "target_name": "bruce springsteen", "weight": 1.0, "year": 2018}, {"source": "16", "target": "69", "source_name": "bob dylan", "target_name": "classical music", "weight": 1.0, "year": 2018}, {"source": "16", "target": "70", "source_name": "bob dylan", "target_name": "world war", "weight": 1.0, "year": 2018}, {"source": "16", "target": "72", "source_name": "bob dylan", "target_name": "jimi hendrix", "weight": 2.0, "year": 2018}, {"source": "16", "target": "75", "source_name": "bob dylan", "target_name": "world war ii", "weight": 1.0, "year": 2018}, {"source": "16", "target": "77", "source_name": "bob dylan", "target_name": "rock music", "weight": 7.0, "year": 2018}, {"source": "16", "target": "79", "source_name": "bob dylan", "target_name": "popular culture", "weight": 3.0, "year": 2018}, {"source": "16", "target": "80", "source_name": "bob dylan", "target_name": "folk music", "weight": 5.0, "year": 2018}, {"source": "17", "target": "21", "source_name": "civil rights", "target_name": "social protest", "weight": 1.0, "year": 2018}, {"source": "17", "target": "24", "source_name": "civil rights", "target_name": "punk rock", "weight": 1.0, "year": 2018}, {"source": "17", "target": "30", "source_name": "civil rights", "target_name": "rock band", "weight": 1.0, "year": 2018}, {"source": "17", "target": "41", "source_name": "civil rights", "target_name": "youth culture", "weight": 1.0, "year": 2018}, {"source": "17", "target": "53", "source_name": "civil rights", "target_name": "popular music", "weight": 4.0, "year": 2018}, {"source": "17", "target": "54", "source_name": "civil rights", "target_name": "american popular music", "weight": 1.0, "year": 2018}, {"source": "17", "target": "61", "source_name": "civil rights", "target_name": "progressive rock", "weight": 1.0, "year": 2018}, {"source": "17", "target": "70", "source_name": "civil rights", "target_name": "world war", "weight": 1.0, "year": 2018}, {"source": "17", "target": "73", "source_name": "civil rights", "target_name": "southern rock", "weight": 1.0, "year": 2018}, {"source": "17", "target": "74", "source_name": "civil rights", "target_name": "united states", "weight": 3.0, "year": 2018}, {"source": "17", "target": "75", "source_name": "civil rights", "target_name": "world war ii", "weight": 1.0, "year": 2018}, {"source": "17", "target": "77", "source_name": "civil rights", "target_name": "rock music", "weight": 3.0, "year": 2018}, {"source": "17", "target": "79", "source_name": "civil rights", "target_name": "popular culture", "weight": 1.0, "year": 2018}, {"source": "17", "target": "80", "source_name": "civil rights", "target_name": "folk music", "weight": 2.0, "year": 2018}, {"source": "18", "target": "19", "source_name": "middle class", "target_name": "music video", "weight": 1.0, "year": 2018}, {"source": "18", "target": "28", "source_name": "middle class", "target_name": "high school", "weight": 1.0, "year": 2018}, {"source": "18", "target": "30", "source_name": "middle class", "target_name": "rock band", "weight": 2.0, "year": 2018}, {"source": "18", "target": "48", "source_name": "middle class", "target_name": "pop music", "weight": 1.0, "year": 2018}, {"source": "18", "target": "53", "source_name": "middle class", "target_name": "popular music", "weight": 2.0, "year": 2018}, {"source": "18", "target": "61", "source_name": "middle class", "target_name": "progressive rock", "weight": 2.0, "year": 2018}, {"source": "18", "target": "77", "source_name": "middle class", "target_name": "rock music", "weight": 2.0, "year": 2018}, {"source": "19", "target": "22", "source_name": "music video", "target_name": "chamber music", "weight": 1.0, "year": 2018}, {"source": "19", "target": "24", "source_name": "music video", "target_name": "punk rock", "weight": 1.0, "year": 2018}, {"source": "19", "target": "28", "source_name": "music video", "target_name": "high school", "weight": 2.0, "year": 2018}, {"source": "19", "target": "30", "source_name": "music video", "target_name": "rock band", "weight": 3.0, "year": 2018}, {"source": "19", "target": "36", "source_name": "music video", "target_name": "music industry", "weight": 2.0, "year": 2018}, {"source": "19", "target": "38", "source_name": "music video", "target_name": "summary additional listening", "weight": 1.0, "year": 2018}, {"source": "19", "target": "40", "source_name": "music video", "target_name": "musical instruments", "weight": 1.0, "year": 2018}, {"source": "19", "target": "47", "source_name": "music video", "target_name": "hard rock", "weight": 1.0, "year": 2018}, {"source": "19", "target": "48", "source_name": "music video", "target_name": "pop music", "weight": 5.0, "year": 2018}, {"source": "19", "target": "49", "source_name": "music video", "target_name": "music theory", "weight": 1.0, "year": 2018}, {"source": "19", "target": "51", "source_name": "music video", "target_name": "cultural identity", "weight": 2.0, "year": 2018}, {"source": "19", "target": "52", "source_name": "music video", "target_name": "folk song", "weight": 1.0, "year": 2018}, {"source": "19", "target": "53", "source_name": "music video", "target_name": "popular music", "weight": 9.0, "year": 2018}, {"source": "19", "target": "54", "source_name": "music video", "target_name": "american popular music", "weight": 1.0, "year": 2018}, {"source": "19", "target": "61", "source_name": "music video", "target_name": "progressive rock", "weight": 1.0, "year": 2018}, {"source": "19", "target": "65", "source_name": "music video", "target_name": "country music", "weight": 4.0, "year": 2018}, {"source": "19", "target": "69", "source_name": "music video", "target_name": "classical music", "weight": 2.0, "year": 2018}, {"source": "19", "target": "72", "source_name": "music video", "target_name": "jimi hendrix", "weight": 1.0, "year": 2018}, {"source": "19", "target": "74", "source_name": "music video", "target_name": "united states", "weight": 3.0, "year": 2018}, {"source": "19", "target": "76", "source_name": "music video", "target_name": "los angeles", "weight": 1.0, "year": 2018}, {"source": "19", "target": "77", "source_name": "music video", "target_name": "rock music", "weight": 10.0, "year": 2018}, {"source": "19", "target": "78", "source_name": "music video", "target_name": "hip hop", "weight": 2.0, "year": 2018}, {"source": "19", "target": "80", "source_name": "music video", "target_name": "folk music", "weight": 1.0, "year": 2018}, {"source": "19", "target": "82", "source_name": "music video", "target_name": "heavy metal", "weight": 1.0, "year": 2018}, {"source": "19", "target": "89", "source_name": "music video", "target_name": "electronic music", "weight": 1.0, "year": 2018}, {"source": "19", "target": "90", "source_name": "music video", "target_name": "blues rock", "weight": 1.0, "year": 2018}, {"source": "20", "target": "24", "source_name": "garage rock", "target_name": "punk rock", "weight": 1.0, "year": 2018}, {"source": "20", "target": "27", "source_name": "garage rock", "target_name": "pop rock", "weight": 1.0, "year": 2018}, {"source": "20", "target": "29", "source_name": "garage rock", "target_name": "rolling stone", "weight": 1.0, "year": 2018}, {"source": "20", "target": "30", "source_name": "garage rock", "target_name": "rock band", "weight": 2.0, "year": 2018}, {"source": "20", "target": "43", "source_name": "garage rock", "target_name": "music education", "weight": 1.0, "year": 2018}, {"source": "20", "target": "44", "source_name": "garage rock", "target_name": "alternative rock", "weight": 2.0, "year": 2018}, {"source": "20", "target": "47", "source_name": "garage rock", "target_name": "hard rock", "weight": 1.0, "year": 2018}, {"source": "20", "target": "48", "source_name": "garage rock", "target_name": "pop music", "weight": 1.0, "year": 2018}, {"source": "20", "target": "53", "source_name": "garage rock", "target_name": "popular music", "weight": 4.0, "year": 2018}, {"source": "20", "target": "57", "source_name": "garage rock", "target_name": "north america", "weight": 1.0, "year": 2018}, {"source": "20", "target": "65", "source_name": "garage rock", "target_name": "country music", "weight": 1.0, "year": 2018}, {"source": "20", "target": "73", "source_name": "garage rock", "target_name": "southern rock", "weight": 1.0, "year": 2018}, {"source": "20", "target": "77", "source_name": "garage rock", "target_name": "rock music", "weight": 5.0, "year": 2018}, {"source": "20", "target": "80", "source_name": "garage rock", "target_name": "folk music", "weight": 1.0, "year": 2018}, {"source": "21", "target": "47", "source_name": "social protest", "target_name": "hard rock", "weight": 1.0, "year": 2018}, {"source": "21", "target": "48", "source_name": "social protest", "target_name": "pop music", "weight": 1.0, "year": 2018}, {"source": "21", "target": "53", "source_name": "social protest", "target_name": "popular music", "weight": 4.0, "year": 2018}, {"source": "21", "target": "57", "source_name": "social protest", "target_name": "north america", "weight": 2.0, "year": 2018}, {"source": "21", "target": "61", "source_name": "social protest", "target_name": "progressive rock", "weight": 1.0, "year": 2018}, {"source": "21", "target": "71", "source_name": "social protest", "target_name": "latin american", "weight": 1.0, "year": 2018}, {"source": "21", "target": "74", "source_name": "social protest", "target_name": "united states", "weight": 2.0, "year": 2018}, {"source": "21", "target": "77", "source_name": "social protest", "target_name": "rock music", "weight": 1.0, "year": 2018}, {"source": "21", "target": "80", "source_name": "social protest", "target_name": "folk music", "weight": 2.0, "year": 2018}, {"source": "21", "target": "82", "source_name": "social protest", "target_name": "heavy metal", "weight": 1.0, "year": 2018}, {"source": "21", "target": "87", "source_name": "social protest", "target_name": "music hall", "weight": 1.0, "year": 2018}, {"source": "22", "target": "35", "source_name": "chamber music", "target_name": "ancient greek", "weight": 1.0, "year": 2018}, {"source": "22", "target": "36", "source_name": "chamber music", "target_name": "music industry", "weight": 1.0, "year": 2018}, {"source": "22", "target": "38", "source_name": "chamber music", "target_name": "summary additional listening", "weight": 1.0, "year": 2018}, {"source": "22", "target": "40", "source_name": "chamber music", "target_name": "musical instruments", "weight": 1.0, "year": 2018}, {"source": "22", "target": "48", "source_name": "chamber music", "target_name": "pop music", "weight": 1.0, "year": 2018}, {"source": "22", "target": "52", "source_name": "chamber music", "target_name": "folk song", "weight": 1.0, "year": 2018}, {"source": "22", "target": "53", "source_name": "chamber music", "target_name": "popular music", "weight": 2.0, "year": 2018}, {"source": "22", "target": "54", "source_name": "chamber music", "target_name": "american popular music", "weight": 1.0, "year": 2018}, {"source": "22", "target": "65", "source_name": "chamber music", "target_name": "country music", "weight": 2.0, "year": 2018}, {"source": "22", "target": "69", "source_name": "chamber music", "target_name": "classical music", "weight": 3.0, "year": 2018}, {"source": "22", "target": "74", "source_name": "chamber music", "target_name": "united states", "weight": 1.0, "year": 2018}, {"source": "22", "target": "77", "source_name": "chamber music", "target_name": "rock music", "weight": 1.0, "year": 2018}, {"source": "22", "target": "79", "source_name": "chamber music", "target_name": "popular culture", "weight": 1.0, "year": 2018}, {"source": "22", "target": "80", "source_name": "chamber music", "target_name": "folk music", "weight": 2.0, "year": 2018}, {"source": "22", "target": "89", "source_name": "chamber music", "target_name": "electronic music", "weight": 3.0, "year": 2018}, {"source": "23", "target": "24", "source_name": "electronic dance music", "target_name": "punk rock", "weight": 1.0, "year": 2018}, {"source": "23", "target": "36", "source_name": "electronic dance music", "target_name": "music industry", "weight": 2.0, "year": 2018}, {"source": "23", "target": "42", "source_name": "electronic dance music", "target_name": "simon frith", "weight": 2.0, "year": 2018}, {"source": "23", "target": "47", "source_name": "electronic dance music", "target_name": "hard rock", "weight": 1.0, "year": 2018}, {"source": "23", "target": "53", "source_name": "electronic dance music", "target_name": "popular music", "weight": 10.0, "year": 2018}, {"source": "23", "target": "56", "source_name": "electronic dance music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2018}, {"source": "23", "target": "57", "source_name": "electronic dance music", "target_name": "north america", "weight": 1.0, "year": 2018}, {"source": "23", "target": "60", "source_name": "electronic dance music", "target_name": "cultural studies", "weight": 2.0, "year": 2018}, {"source": "23", "target": "67", "source_name": "electronic dance music", "target_name": "rock art", "weight": 1.0, "year": 2018}, {"source": "23", "target": "74", "source_name": "electronic dance music", "target_name": "united states", "weight": 2.0, "year": 2018}, {"source": "23", "target": "76", "source_name": "electronic dance music", "target_name": "los angeles", "weight": 1.0, "year": 2018}, {"source": "23", "target": "77", "source_name": "electronic dance music", "target_name": "rock music", "weight": 1.0, "year": 2018}, {"source": "23", "target": "78", "source_name": "electronic dance music", "target_name": "hip hop", "weight": 1.0, "year": 2018}, {"source": "23", "target": "79", "source_name": "electronic dance music", "target_name": "popular culture", "weight": 1.0, "year": 2018}, {"source": "23", "target": "82", "source_name": "electronic dance music", "target_name": "heavy metal", "weight": 3.0, "year": 2018}, {"source": "23", "target": "88", "source_name": "electronic dance music", "target_name": "oxford university press", "weight": 1.0, "year": 2018}, {"source": "23", "target": "89", "source_name": "electronic dance music", "target_name": "electronic music", "weight": 4.0, "year": 2018}, {"source": "24", "target": "27", "source_name": "punk rock", "target_name": "pop rock", "weight": 1.0, "year": 2018}, {"source": "24", "target": "30", "source_name": "punk rock", "target_name": "rock band", "weight": 1.0, "year": 2018}, {"source": "24", "target": "36", "source_name": "punk rock", "target_name": "music industry", "weight": 1.0, "year": 2018}, {"source": "24", "target": "41", "source_name": "punk rock", "target_name": "youth culture", "weight": 2.0, "year": 2018}, {"source": "24", "target": "42", "source_name": "punk rock", "target_name": "simon frith", "weight": 1.0, "year": 2018}, {"source": "24", "target": "44", "source_name": "punk rock", "target_name": "alternative rock", "weight": 4.0, "year": 2018}, {"source": "24", "target": "47", "source_name": "punk rock", "target_name": "hard rock", "weight": 5.0, "year": 2018}, {"source": "24", "target": "48", "source_name": "punk rock", "target_name": "pop music", "weight": 4.0, "year": 2018}, {"source": "24", "target": "51", "source_name": "punk rock", "target_name": "cultural identity", "weight": 1.0, "year": 2018}, {"source": "24", "target": "53", "source_name": "punk rock", "target_name": "popular music", "weight": 13.0, "year": 2018}, {"source": "24", "target": "57", "source_name": "punk rock", "target_name": "north america", "weight": 1.0, "year": 2018}, {"source": "24", "target": "61", "source_name": "punk rock", "target_name": "progressive rock", "weight": 3.0, "year": 2018}, {"source": "24", "target": "65", "source_name": "punk rock", "target_name": "country music", "weight": 1.0, "year": 2018}, {"source": "24", "target": "69", "source_name": "punk rock", "target_name": "classical music", "weight": 1.0, "year": 2018}, {"source": "24", "target": "74", "source_name": "punk rock", "target_name": "united states", "weight": 3.0, "year": 2018}, {"source": "24", "target": "77", "source_name": "punk rock", "target_name": "rock music", "weight": 12.0, "year": 2018}, {"source": "24", "target": "78", "source_name": "punk rock", "target_name": "hip hop", "weight": 1.0, "year": 2018}, {"source": "24", "target": "79", "source_name": "punk rock", "target_name": "popular culture", "weight": 1.0, "year": 2018}, {"source": "24", "target": "80", "source_name": "punk rock", "target_name": "folk music", "weight": 1.0, "year": 2018}, {"source": "24", "target": "82", "source_name": "punk rock", "target_name": "heavy metal", "weight": 6.0, "year": 2018}, {"source": "25", "target": "30", "source_name": "russian rock", "target_name": "rock band", "weight": 1.0, "year": 2018}, {"source": "25", "target": "37", "source_name": "russian rock", "target_name": "middle ages", "weight": 1.0, "year": 2018}, {"source": "25", "target": "46", "source_name": "russian rock", "target_name": "music festival", "weight": 1.0, "year": 2018}, {"source": "25", "target": "53", "source_name": "russian rock", "target_name": "popular music", "weight": 2.0, "year": 2018}, {"source": "25", "target": "66", "source_name": "russian rock", "target_name": "hong kong", "weight": 1.0, "year": 2018}, {"source": "25", "target": "77", "source_name": "russian rock", "target_name": "rock music", "weight": 4.0, "year": 2018}, {"source": "25", "target": "78", "source_name": "russian rock", "target_name": "hip hop", "weight": 1.0, "year": 2018}, {"source": "25", "target": "80", "source_name": "russian rock", "target_name": "folk music", "weight": 1.0, "year": 2018}, {"source": "25", "target": "82", "source_name": "russian rock", "target_name": "heavy metal", "weight": 1.0, "year": 2018}, {"source": "25", "target": "85", "source_name": "russian rock", "target_name": "jewish music", "weight": 1.0, "year": 2018}, {"source": "26", "target": "43", "source_name": "information technology", "target_name": "music education", "weight": 1.0, "year": 2018}, {"source": "27", "target": "44", "source_name": "pop rock", "target_name": "alternative rock", "weight": 1.0, "year": 2018}, {"source": "27", "target": "47", "source_name": "pop rock", "target_name": "hard rock", "weight": 1.0, "year": 2018}, {"source": "27", "target": "48", "source_name": "pop rock", "target_name": "pop music", "weight": 1.0, "year": 2018}, {"source": "27", "target": "53", "source_name": "pop rock", "target_name": "popular music", "weight": 1.0, "year": 2018}, {"source": "27", "target": "64", "source_name": "pop rock", "target_name": "english language", "weight": 1.0, "year": 2018}, {"source": "27", "target": "65", "source_name": "pop rock", "target_name": "country music", "weight": 1.0, "year": 2018}, {"source": "27", "target": "66", "source_name": "pop rock", "target_name": "hong kong", "weight": 1.0, "year": 2018}, {"source": "27", "target": "67", "source_name": "pop rock", "target_name": "rock art", "weight": 1.0, "year": 2018}, {"source": "27", "target": "77", "source_name": "pop rock", "target_name": "rock music", "weight": 1.0, "year": 2018}, {"source": "27", "target": "83", "source_name": "pop rock", "target_name": "folk rock", "weight": 1.0, "year": 2018}, {"source": "28", "target": "30", "source_name": "high school", "target_name": "rock band", "weight": 1.0, "year": 2018}, {"source": "28", "target": "37", "source_name": "high school", "target_name": "middle ages", "weight": 1.0, "year": 2018}, {"source": "28", "target": "48", "source_name": "high school", "target_name": "pop music", "weight": 3.0, "year": 2018}, {"source": "28", "target": "53", "source_name": "high school", "target_name": "popular music", "weight": 1.0, "year": 2018}, {"source": "28", "target": "58", "source_name": "high school", "target_name": "music therapy", "weight": 1.0, "year": 2018}, {"source": "28", "target": "61", "source_name": "high school", "target_name": "progressive rock", "weight": 1.0, "year": 2018}, {"source": "28", "target": "69", "source_name": "high school", "target_name": "classical music", "weight": 1.0, "year": 2018}, {"source": "28", "target": "74", "source_name": "high school", "target_name": "united states", "weight": 1.0, "year": 2018}, {"source": "28", "target": "77", "source_name": "high school", "target_name": "rock music", "weight": 6.0, "year": 2018}, {"source": "28", "target": "82", "source_name": "high school", "target_name": "heavy metal", "weight": 1.0, "year": 2018}, {"source": "29", "target": "30", "source_name": "rolling stone", "target_name": "rock band", "weight": 1.0, "year": 2018}, {"source": "29", "target": "36", "source_name": "rolling stone", "target_name": "music industry", "weight": 2.0, "year": 2018}, {"source": "29", "target": "42", "source_name": "rolling stone", "target_name": "simon frith", "weight": 1.0, "year": 2018}, {"source": "29", "target": "44", "source_name": "rolling stone", "target_name": "alternative rock", "weight": 1.0, "year": 2018}, {"source": "29", "target": "48", "source_name": "rolling stone", "target_name": "pop music", "weight": 4.0, "year": 2018}, {"source": "29", "target": "53", "source_name": "rolling stone", "target_name": "popular music", "weight": 10.0, "year": 2018}, {"source": "29", "target": "54", "source_name": "rolling stone", "target_name": "american popular music", "weight": 2.0, "year": 2018}, {"source": "29", "target": "55", "source_name": "rolling stone", "target_name": "rock criticism", "weight": 4.0, "year": 2018}, {"source": "29", "target": "56", "source_name": "rolling stone", "target_name": "bruce springsteen", "weight": 2.0, "year": 2018}, {"source": "29", "target": "62", "source_name": "rolling stone", "target_name": "led zeppelin", "weight": 2.0, "year": 2018}, {"source": "29", "target": "69", "source_name": "rolling stone", "target_name": "classical music", "weight": 1.0, "year": 2018}, {"source": "29", "target": "72", "source_name": "rolling stone", "target_name": "jimi hendrix", "weight": 3.0, "year": 2018}, {"source": "29", "target": "74", "source_name": "rolling stone", "target_name": "united states", "weight": 2.0, "year": 2018}, {"source": "29", "target": "77", "source_name": "rolling stone", "target_name": "rock music", "weight": 9.0, "year": 2018}, {"source": "29", "target": "79", "source_name": "rolling stone", "target_name": "popular culture", "weight": 3.0, "year": 2018}, {"source": "29", "target": "80", "source_name": "rolling stone", "target_name": "folk music", "weight": 1.0, "year": 2018}, {"source": "29", "target": "87", "source_name": "rolling stone", "target_name": "music hall", "weight": 2.0, "year": 2018}, {"source": "30", "target": "36", "source_name": "rock band", "target_name": "music industry", "weight": 3.0, "year": 2018}, {"source": "30", "target": "37", "source_name": "rock band", "target_name": "middle ages", "weight": 2.0, "year": 2018}, {"source": "30", "target": "41", "source_name": "rock band", "target_name": "youth culture", "weight": 1.0, "year": 2018}, {"source": "30", "target": "43", "source_name": "rock band", "target_name": "music education", "weight": 5.0, "year": 2018}, {"source": "30", "target": "44", "source_name": "rock band", "target_name": "alternative rock", "weight": 1.0, "year": 2018}, {"source": "30", "target": "47", "source_name": "rock band", "target_name": "hard rock", "weight": 1.0, "year": 2018}, {"source": "30", "target": "48", "source_name": "rock band", "target_name": "pop music", "weight": 1.0, "year": 2018}, {"source": "30", "target": "52", "source_name": "rock band", "target_name": "folk song", "weight": 2.0, "year": 2018}, {"source": "30", "target": "53", "source_name": "rock band", "target_name": "popular music", "weight": 22.0, "year": 2018}, {"source": "30", "target": "54", "source_name": "rock band", "target_name": "american popular music", "weight": 1.0, "year": 2018}, {"source": "30", "target": "55", "source_name": "rock band", "target_name": "rock criticism", "weight": 1.0, "year": 2018}, {"source": "30", "target": "61", "source_name": "rock band", "target_name": "progressive rock", "weight": 11.0, "year": 2018}, {"source": "30", "target": "62", "source_name": "rock band", "target_name": "led zeppelin", "weight": 1.0, "year": 2018}, {"source": "30", "target": "65", "source_name": "rock band", "target_name": "country music", "weight": 1.0, "year": 2018}, {"source": "30", "target": "67", "source_name": "rock band", "target_name": "rock art", "weight": 1.0, "year": 2018}, {"source": "30", "target": "69", "source_name": "rock band", "target_name": "classical music", "weight": 4.0, "year": 2018}, {"source": "30", "target": "72", "source_name": "rock band", "target_name": "jimi hendrix", "weight": 2.0, "year": 2018}, {"source": "30", "target": "73", "source_name": "rock band", "target_name": "southern rock", "weight": 2.0, "year": 2018}, {"source": "30", "target": "74", "source_name": "rock band", "target_name": "united states", "weight": 2.0, "year": 2018}, {"source": "30", "target": "76", "source_name": "rock band", "target_name": "los angeles", "weight": 1.0, "year": 2018}, {"source": "30", "target": "77", "source_name": "rock band", "target_name": "rock music", "weight": 36.0, "year": 2018}, {"source": "30", "target": "79", "source_name": "rock band", "target_name": "popular culture", "weight": 2.0, "year": 2018}, {"source": "30", "target": "80", "source_name": "rock band", "target_name": "folk music", "weight": 2.0, "year": 2018}, {"source": "30", "target": "82", "source_name": "rock band", "target_name": "heavy metal", "weight": 4.0, "year": 2018}, {"source": "30", "target": "83", "source_name": "rock band", "target_name": "folk rock", "weight": 1.0, "year": 2018}, {"source": "30", "target": "87", "source_name": "rock band", "target_name": "music hall", "weight": 1.0, "year": 2018}, {"source": "31", "target": "69", "source_name": "post modernism", "target_name": "classical music", "weight": 1.0, "year": 2018}, {"source": "32", "target": "43", "source_name": "higher education", "target_name": "music education", "weight": 5.0, "year": 2018}, {"source": "32", "target": "53", "source_name": "higher education", "target_name": "popular music", "weight": 1.0, "year": 2018}, {"source": "32", "target": "60", "source_name": "higher education", "target_name": "cultural studies", "weight": 1.0, "year": 2018}, {"source": "32", "target": "69", "source_name": "higher education", "target_name": "classical music", "weight": 1.0, "year": 2018}, {"source": "33", "target": "53", "source_name": "jesus christ", "target_name": "popular music", "weight": 1.0, "year": 2018}, {"source": "33", "target": "70", "source_name": "jesus christ", "target_name": "world war", "weight": 1.0, "year": 2018}, {"source": "33", "target": "77", "source_name": "jesus christ", "target_name": "rock music", "weight": 4.0, "year": 2018}, {"source": "34", "target": "36", "source_name": "mass media", "target_name": "music industry", "weight": 1.0, "year": 2018}, {"source": "34", "target": "40", "source_name": "mass media", "target_name": "musical instruments", "weight": 1.0, "year": 2018}, {"source": "34", "target": "41", "source_name": "mass media", "target_name": "youth culture", "weight": 1.0, "year": 2018}, {"source": "34", "target": "43", "source_name": "mass media", "target_name": "music education", "weight": 2.0, "year": 2018}, {"source": "34", "target": "46", "source_name": "mass media", "target_name": "music festival", "weight": 1.0, "year": 2018}, {"source": "34", "target": "48", "source_name": "mass media", "target_name": "pop music", "weight": 2.0, "year": 2018}, {"source": "34", "target": "51", "source_name": "mass media", "target_name": "cultural identity", "weight": 1.0, "year": 2018}, {"source": "34", "target": "52", "source_name": "mass media", "target_name": "folk song", "weight": 2.0, "year": 2018}, {"source": "34", "target": "53", "source_name": "mass media", "target_name": "popular music", "weight": 6.0, "year": 2018}, {"source": "34", "target": "60", "source_name": "mass media", "target_name": "cultural studies", "weight": 1.0, "year": 2018}, {"source": "34", "target": "65", "source_name": "mass media", "target_name": "country music", "weight": 1.0, "year": 2018}, {"source": "34", "target": "66", "source_name": "mass media", "target_name": "hong kong", "weight": 1.0, "year": 2018}, {"source": "34", "target": "67", "source_name": "mass media", "target_name": "rock art", "weight": 1.0, "year": 2018}, {"source": "34", "target": "69", "source_name": "mass media", "target_name": "classical music", "weight": 1.0, "year": 2018}, {"source": "34", "target": "77", "source_name": "mass media", "target_name": "rock music", "weight": 4.0, "year": 2018}, {"source": "34", "target": "79", "source_name": "mass media", "target_name": "popular culture", "weight": 2.0, "year": 2018}, {"source": "35", "target": "43", "source_name": "ancient greek", "target_name": "music education", "weight": 1.0, "year": 2018}, {"source": "35", "target": "65", "source_name": "ancient greek", "target_name": "country music", "weight": 1.0, "year": 2018}, {"source": "35", "target": "77", "source_name": "ancient greek", "target_name": "rock music", "weight": 1.0, "year": 2018}, {"source": "35", "target": "80", "source_name": "ancient greek", "target_name": "folk music", "weight": 1.0, "year": 2018}, {"source": "35", "target": "89", "source_name": "ancient greek", "target_name": "electronic music", "weight": 1.0, "year": 2018}, {"source": "36", "target": "38", "source_name": "music industry", "target_name": "summary additional listening", "weight": 1.0, "year": 2018}, {"source": "36", "target": "40", "source_name": "music industry", "target_name": "musical instruments", "weight": 1.0, "year": 2018}, {"source": "36", "target": "41", "source_name": "music industry", "target_name": "youth culture", "weight": 2.0, "year": 2018}, {"source": "36", "target": "42", "source_name": "music industry", "target_name": "simon frith", "weight": 2.0, "year": 2018}, {"source": "36", "target": "43", "source_name": "music industry", "target_name": "music education", "weight": 3.0, "year": 2018}, {"source": "36", "target": "44", "source_name": "music industry", "target_name": "alternative rock", "weight": 1.0, "year": 2018}, {"source": "36", "target": "46", "source_name": "music industry", "target_name": "music festival", "weight": 1.0, "year": 2018}, {"source": "36", "target": "47", "source_name": "music industry", "target_name": "hard rock", "weight": 3.0, "year": 2018}, {"source": "36", "target": "48", "source_name": "music industry", "target_name": "pop music", "weight": 10.0, "year": 2018}, {"source": "36", "target": "49", "source_name": "music industry", "target_name": "music theory", "weight": 1.0, "year": 2018}, {"source": "36", "target": "50", "source_name": "music industry", "target_name": "hollywood film", "weight": 1.0, "year": 2018}, {"source": "36", "target": "51", "source_name": "music industry", "target_name": "cultural identity", "weight": 3.0, "year": 2018}, {"source": "36", "target": "52", "source_name": "music industry", "target_name": "folk song", "weight": 1.0, "year": 2018}, {"source": "36", "target": "53", "source_name": "music industry", "target_name": "popular music", "weight": 36.0, "year": 2018}, {"source": "36", "target": "54", "source_name": "music industry", "target_name": "american popular music", "weight": 3.0, "year": 2018}, {"source": "36", "target": "55", "source_name": "music industry", "target_name": "rock criticism", "weight": 3.0, "year": 2018}, {"source": "36", "target": "56", "source_name": "music industry", "target_name": "bruce springsteen", "weight": 2.0, "year": 2018}, {"source": "36", "target": "60", "source_name": "music industry", "target_name": "cultural studies", "weight": 2.0, "year": 2018}, {"source": "36", "target": "61", "source_name": "music industry", "target_name": "progressive rock", "weight": 3.0, "year": 2018}, {"source": "36", "target": "62", "source_name": "music industry", "target_name": "led zeppelin", "weight": 1.0, "year": 2018}, {"source": "36", "target": "64", "source_name": "music industry", "target_name": "english language", "weight": 1.0, "year": 2018}, {"source": "36", "target": "65", "source_name": "music industry", "target_name": "country music", "weight": 2.0, "year": 2018}, {"source": "36", "target": "66", "source_name": "music industry", "target_name": "hong kong", "weight": 1.0, "year": 2018}, {"source": "36", "target": "67", "source_name": "music industry", "target_name": "rock art", "weight": 1.0, "year": 2018}, {"source": "36", "target": "68", "source_name": "music industry", "target_name": "hearing loss", "weight": 1.0, "year": 2018}, {"source": "36", "target": "69", "source_name": "music industry", "target_name": "classical music", "weight": 6.0, "year": 2018}, {"source": "36", "target": "70", "source_name": "music industry", "target_name": "world war", "weight": 2.0, "year": 2018}, {"source": "36", "target": "72", "source_name": "music industry", "target_name": "jimi hendrix", "weight": 4.0, "year": 2018}, {"source": "36", "target": "74", "source_name": "music industry", "target_name": "united states", "weight": 6.0, "year": 2018}, {"source": "36", "target": "75", "source_name": "music industry", "target_name": "world war ii", "weight": 3.0, "year": 2018}, {"source": "36", "target": "76", "source_name": "music industry", "target_name": "los angeles", "weight": 2.0, "year": 2018}, {"source": "36", "target": "77", "source_name": "music industry", "target_name": "rock music", "weight": 25.0, "year": 2018}, {"source": "36", "target": "78", "source_name": "music industry", "target_name": "hip hop", "weight": 6.0, "year": 2018}, {"source": "36", "target": "79", "source_name": "music industry", "target_name": "popular culture", "weight": 6.0, "year": 2018}, {"source": "36", "target": "80", "source_name": "music industry", "target_name": "folk music", "weight": 5.0, "year": 2018}, {"source": "36", "target": "82", "source_name": "music industry", "target_name": "heavy metal", "weight": 2.0, "year": 2018}, {"source": "36", "target": "83", "source_name": "music industry", "target_name": "folk rock", "weight": 1.0, "year": 2018}, {"source": "36", "target": "87", "source_name": "music industry", "target_name": "music hall", "weight": 1.0, "year": 2018}, {"source": "36", "target": "88", "source_name": "music industry", "target_name": "oxford university press", "weight": 2.0, "year": 2018}, {"source": "36", "target": "89", "source_name": "music industry", "target_name": "electronic music", "weight": 3.0, "year": 2018}, {"source": "37", "target": "44", "source_name": "middle ages", "target_name": "alternative rock", "weight": 1.0, "year": 2018}, {"source": "37", "target": "58", "source_name": "middle ages", "target_name": "music therapy", "weight": 1.0, "year": 2018}, {"source": "37", "target": "61", "source_name": "middle ages", "target_name": "progressive rock", "weight": 1.0, "year": 2018}, {"source": "37", "target": "69", "source_name": "middle ages", "target_name": "classical music", "weight": 1.0, "year": 2018}, {"source": "37", "target": "77", "source_name": "middle ages", "target_name": "rock music", "weight": 3.0, "year": 2018}, {"source": "37", "target": "80", "source_name": "middle ages", "target_name": "folk music", "weight": 2.0, "year": 2018}, {"source": "38", "target": "40", "source_name": "summary additional listening", "target_name": "musical instruments", "weight": 1.0, "year": 2018}, {"source": "38", "target": "52", "source_name": "summary additional listening", "target_name": "folk song", "weight": 1.0, "year": 2018}, {"source": "38", "target": "53", "source_name": "summary additional listening", "target_name": "popular music", "weight": 1.0, "year": 2018}, {"source": "38", "target": "54", "source_name": "summary additional listening", "target_name": "american popular music", "weight": 1.0, "year": 2018}, {"source": "38", "target": "65", "source_name": "summary additional listening", "target_name": "country music", "weight": 1.0, "year": 2018}, {"source": "38", "target": "69", "source_name": "summary additional listening", "target_name": "classical music", "weight": 1.0, "year": 2018}, {"source": "38", "target": "74", "source_name": "summary additional listening", "target_name": "united states", "weight": 1.0, "year": 2018}, {"source": "38", "target": "80", "source_name": "summary additional listening", "target_name": "folk music", "weight": 1.0, "year": 2018}, {"source": "38", "target": "89", "source_name": "summary additional listening", "target_name": "electronic music", "weight": 1.0, "year": 2018}, {"source": "40", "target": "43", "source_name": "musical instruments", "target_name": "music education", "weight": 1.0, "year": 2018}, {"source": "40", "target": "49", "source_name": "musical instruments", "target_name": "music theory", "weight": 1.0, "year": 2018}, {"source": "40", "target": "52", "source_name": "musical instruments", "target_name": "folk song", "weight": 1.0, "year": 2018}, {"source": "40", "target": "53", "source_name": "musical instruments", "target_name": "popular music", "weight": 2.0, "year": 2018}, {"source": "40", "target": "54", "source_name": "musical instruments", "target_name": "american popular music", "weight": 2.0, "year": 2018}, {"source": "40", "target": "65", "source_name": "musical instruments", "target_name": "country music", "weight": 1.0, "year": 2018}, {"source": "40", "target": "69", "source_name": "musical instruments", "target_name": "classical music", "weight": 1.0, "year": 2018}, {"source": "40", "target": "70", "source_name": "musical instruments", "target_name": "world war", "weight": 1.0, "year": 2018}, {"source": "40", "target": "74", "source_name": "musical instruments", "target_name": "united states", "weight": 2.0, "year": 2018}, {"source": "40", "target": "75", "source_name": "musical instruments", "target_name": "world war ii", "weight": 1.0, "year": 2018}, {"source": "40", "target": "80", "source_name": "musical instruments", "target_name": "folk music", "weight": 1.0, "year": 2018}, {"source": "40", "target": "89", "source_name": "musical instruments", "target_name": "electronic music", "weight": 2.0, "year": 2018}, {"source": "41", "target": "42", "source_name": "youth culture", "target_name": "simon frith", "weight": 1.0, "year": 2018}, {"source": "41", "target": "47", "source_name": "youth culture", "target_name": "hard rock", "weight": 1.0, "year": 2018}, {"source": "41", "target": "48", "source_name": "youth culture", "target_name": "pop music", "weight": 5.0, "year": 2018}, {"source": "41", "target": "51", "source_name": "youth culture", "target_name": "cultural identity", "weight": 2.0, "year": 2018}, {"source": "41", "target": "53", "source_name": "youth culture", "target_name": "popular music", "weight": 9.0, "year": 2018}, {"source": "41", "target": "57", "source_name": "youth culture", "target_name": "north america", "weight": 1.0, "year": 2018}, {"source": "41", "target": "60", "source_name": "youth culture", "target_name": "cultural studies", "weight": 3.0, "year": 2018}, {"source": "41", "target": "61", "source_name": "youth culture", "target_name": "progressive rock", "weight": 1.0, "year": 2018}, {"source": "41", "target": "66", "source_name": "youth culture", "target_name": "hong kong", "weight": 1.0, "year": 2018}, {"source": "41", "target": "74", "source_name": "youth culture", "target_name": "united states", "weight": 2.0, "year": 2018}, {"source": "41", "target": "75", "source_name": "youth culture", "target_name": "world war ii", "weight": 1.0, "year": 2018}, {"source": "41", "target": "77", "source_name": "youth culture", "target_name": "rock music", "weight": 11.0, "year": 2018}, {"source": "41", "target": "80", "source_name": "youth culture", "target_name": "folk music", "weight": 2.0, "year": 2018}, {"source": "42", "target": "47", "source_name": "simon frith", "target_name": "hard rock", "weight": 1.0, "year": 2018}, {"source": "42", "target": "48", "source_name": "simon frith", "target_name": "pop music", "weight": 6.0, "year": 2018}, {"source": "42", "target": "49", "source_name": "simon frith", "target_name": "music theory", "weight": 1.0, "year": 2018}, {"source": "42", "target": "51", "source_name": "simon frith", "target_name": "cultural identity", "weight": 1.0, "year": 2018}, {"source": "42", "target": "53", "source_name": "simon frith", "target_name": "popular music", "weight": 7.0, "year": 2018}, {"source": "42", "target": "55", "source_name": "simon frith", "target_name": "rock criticism", "weight": 2.0, "year": 2018}, {"source": "42", "target": "56", "source_name": "simon frith", "target_name": "bruce springsteen", "weight": 1.0, "year": 2018}, {"source": "42", "target": "57", "source_name": "simon frith", "target_name": "north america", "weight": 1.0, "year": 2018}, {"source": "42", "target": "60", "source_name": "simon frith", "target_name": "cultural studies", "weight": 4.0, "year": 2018}, {"source": "42", "target": "61", "source_name": "simon frith", "target_name": "progressive rock", "weight": 1.0, "year": 2018}, {"source": "42", "target": "65", "source_name": "simon frith", "target_name": "country music", "weight": 1.0, "year": 2018}, {"source": "42", "target": "72", "source_name": "simon frith", "target_name": "jimi hendrix", "weight": 1.0, "year": 2018}, {"source": "42", "target": "76", "source_name": "simon frith", "target_name": "los angeles", "weight": 1.0, "year": 2018}, {"source": "42", "target": "77", "source_name": "simon frith", "target_name": "rock music", "weight": 6.0, "year": 2018}, {"source": "42", "target": "78", "source_name": "simon frith", "target_name": "hip hop", "weight": 1.0, "year": 2018}, {"source": "42", "target": "79", "source_name": "simon frith", "target_name": "popular culture", "weight": 2.0, "year": 2018}, {"source": "42", "target": "82", "source_name": "simon frith", "target_name": "heavy metal", "weight": 1.0, "year": 2018}, {"source": "42", "target": "88", "source_name": "simon frith", "target_name": "oxford university press", "weight": 1.0, "year": 2018}, {"source": "43", "target": "48", "source_name": "music education", "target_name": "pop music", "weight": 2.0, "year": 2018}, {"source": "43", "target": "49", "source_name": "music education", "target_name": "music theory", "weight": 3.0, "year": 2018}, {"source": "43", "target": "52", "source_name": "music education", "target_name": "folk song", "weight": 1.0, "year": 2018}, {"source": "43", "target": "53", "source_name": "music education", "target_name": "popular music", "weight": 7.0, "year": 2018}, {"source": "43", "target": "57", "source_name": "music education", "target_name": "north america", "weight": 1.0, "year": 2018}, {"source": "43", "target": "60", "source_name": "music education", "target_name": "cultural studies", "weight": 2.0, "year": 2018}, {"source": "43", "target": "66", "source_name": "music education", "target_name": "hong kong", "weight": 1.0, "year": 2018}, {"source": "43", "target": "69", "source_name": "music education", "target_name": "classical music", "weight": 3.0, "year": 2018}, {"source": "43", "target": "74", "source_name": "music education", "target_name": "united states", "weight": 1.0, "year": 2018}, {"source": "43", "target": "77", "source_name": "music education", "target_name": "rock music", "weight": 6.0, "year": 2018}, {"source": "43", "target": "79", "source_name": "music education", "target_name": "popular culture", "weight": 1.0, "year": 2018}, {"source": "43", "target": "80", "source_name": "music education", "target_name": "folk music", "weight": 6.0, "year": 2018}, {"source": "43", "target": "82", "source_name": "music education", "target_name": "heavy metal", "weight": 1.0, "year": 2018}, {"source": "44", "target": "46", "source_name": "alternative rock", "target_name": "music festival", "weight": 1.0, "year": 2018}, {"source": "44", "target": "47", "source_name": "alternative rock", "target_name": "hard rock", "weight": 3.0, "year": 2018}, {"source": "44", "target": "48", "source_name": "alternative rock", "target_name": "pop music", "weight": 1.0, "year": 2018}, {"source": "44", "target": "51", "source_name": "alternative rock", "target_name": "cultural identity", "weight": 1.0, "year": 2018}, {"source": "44", "target": "53", "source_name": "alternative rock", "target_name": "popular music", "weight": 11.0, "year": 2018}, {"source": "44", "target": "57", "source_name": "alternative rock", "target_name": "north america", "weight": 3.0, "year": 2018}, {"source": "44", "target": "61", "source_name": "alternative rock", "target_name": "progressive rock", "weight": 1.0, "year": 2018}, {"source": "44", "target": "65", "source_name": "alternative rock", "target_name": "country music", "weight": 3.0, "year": 2018}, {"source": "44", "target": "67", "source_name": "alternative rock", "target_name": "rock art", "weight": 1.0, "year": 2018}, {"source": "44", "target": "73", "source_name": "alternative rock", "target_name": "southern rock", "weight": 1.0, "year": 2018}, {"source": "44", "target": "74", "source_name": "alternative rock", "target_name": "united states", "weight": 2.0, "year": 2018}, {"source": "44", "target": "77", "source_name": "alternative rock", "target_name": "rock music", "weight": 8.0, "year": 2018}, {"source": "44", "target": "78", "source_name": "alternative rock", "target_name": "hip hop", "weight": 1.0, "year": 2018}, {"source": "44", "target": "79", "source_name": "alternative rock", "target_name": "popular culture", "weight": 1.0, "year": 2018}, {"source": "44", "target": "80", "source_name": "alternative rock", "target_name": "folk music", "weight": 1.0, "year": 2018}, {"source": "44", "target": "82", "source_name": "alternative rock", "target_name": "heavy metal", "weight": 2.0, "year": 2018}, {"source": "45", "target": "77", "source_name": "double bass", "target_name": "rock music", "weight": 2.0, "year": 2018}, {"source": "46", "target": "47", "source_name": "music festival", "target_name": "hard rock", "weight": 1.0, "year": 2018}, {"source": "46", "target": "48", "source_name": "music festival", "target_name": "pop music", "weight": 2.0, "year": 2018}, {"source": "46", "target": "53", "source_name": "music festival", "target_name": "popular music", "weight": 2.0, "year": 2018}, {"source": "46", "target": "61", "source_name": "music festival", "target_name": "progressive rock", "weight": 1.0, "year": 2018}, {"source": "46", "target": "65", "source_name": "music festival", "target_name": "country music", "weight": 1.0, "year": 2018}, {"source": "46", "target": "66", "source_name": "music festival", "target_name": "hong kong", "weight": 1.0, "year": 2018}, {"source": "46", "target": "69", "source_name": "music festival", "target_name": "classical music", "weight": 3.0, "year": 2018}, {"source": "46", "target": "77", "source_name": "music festival", "target_name": "rock music", "weight": 7.0, "year": 2018}, {"source": "46", "target": "78", "source_name": "music festival", "target_name": "hip hop", "weight": 1.0, "year": 2018}, {"source": "46", "target": "80", "source_name": "music festival", "target_name": "folk music", "weight": 2.0, "year": 2018}, {"source": "46", "target": "82", "source_name": "music festival", "target_name": "heavy metal", "weight": 1.0, "year": 2018}, {"source": "46", "target": "85", "source_name": "music festival", "target_name": "jewish music", "weight": 1.0, "year": 2018}, {"source": "46", "target": "86", "source_name": "music festival", "target_name": "south korea", "weight": 2.0, "year": 2018}, {"source": "47", "target": "48", "source_name": "hard rock", "target_name": "pop music", "weight": 2.0, "year": 2018}, {"source": "47", "target": "51", "source_name": "hard rock", "target_name": "cultural identity", "weight": 1.0, "year": 2018}, {"source": "47", "target": "53", "source_name": "hard rock", "target_name": "popular music", "weight": 5.0, "year": 2018}, {"source": "47", "target": "56", "source_name": "hard rock", "target_name": "bruce springsteen", "weight": 1.0, "year": 2018}, {"source": "47", "target": "57", "source_name": "hard rock", "target_name": "north america", "weight": 1.0, "year": 2018}, {"source": "47", "target": "59", "source_name": "hard rock", "target_name": "college students", "weight": 1.0, "year": 2018}, {"source": "47", "target": "61", "source_name": "hard rock", "target_name": "progressive rock", "weight": 2.0, "year": 2018}, {"source": "47", "target": "65", "source_name": "hard rock", "target_name": "country music", "weight": 2.0, "year": 2018}, {"source": "47", "target": "69", "source_name": "hard rock", "target_name": "classical music", "weight": 2.0, "year": 2018}, {"source": "47", "target": "74", "source_name": "hard rock", "target_name": "united states", "weight": 1.0, "year": 2018}, {"source": "47", "target": "77", "source_name": "hard rock", "target_name": "rock music", "weight": 13.0, "year": 2018}, {"source": "47", "target": "78", "source_name": "hard rock", "target_name": "hip hop", "weight": 1.0, "year": 2018}, {"source": "47", "target": "79", "source_name": "hard rock", "target_name": "popular culture", "weight": 2.0, "year": 2018}, {"source": "47", "target": "82", "source_name": "hard rock", "target_name": "heavy metal", "weight": 9.0, "year": 2018}, {"source": "47", "target": "83", "source_name": "hard rock", "target_name": "folk rock", "weight": 1.0, "year": 2018}, {"source": "47", "target": "89", "source_name": "hard rock", "target_name": "electronic music", "weight": 1.0, "year": 2018}, {"source": "48", "target": "49", "source_name": "pop music", "target_name": "music theory", "weight": 1.0, "year": 2018}, {"source": "48", "target": "51", "source_name": "pop music", "target_name": "cultural identity", "weight": 3.0, "year": 2018}, {"source": "48", "target": "52", "source_name": "pop music", "target_name": "folk song", "weight": 2.0, "year": 2018}, {"source": "48", "target": "53", "source_name": "pop music", "target_name": "popular music", "weight": 46.0, "year": 2018}, {"source": "48", "target": "55", "source_name": "pop music", "target_name": "rock criticism", "weight": 2.0, "year": 2018}, {"source": "48", "target": "57", "source_name": "pop music", "target_name": "north america", "weight": 2.0, "year": 2018}, {"source": "48", "target": "58", "source_name": "pop music", "target_name": "music therapy", "weight": 1.0, "year": 2018}, {"source": "48", "target": "59", "source_name": "pop music", "target_name": "college students", "weight": 3.0, "year": 2018}, {"source": "48", "target": "60", "source_name": "pop music", "target_name": "cultural studies", "weight": 1.0, "year": 2018}, {"source": "48", "target": "62", "source_name": "pop music", "target_name": "led zeppelin", "weight": 2.0, "year": 2018}, {"source": "48", "target": "64", "source_name": "pop music", "target_name": "english language", "weight": 2.0, "year": 2018}, {"source": "48", "target": "65", "source_name": "pop music", "target_name": "country music", "weight": 2.0, "year": 2018}, {"source": "48", "target": "66", "source_name": "pop music", "target_name": "hong kong", "weight": 4.0, "year": 2018}, {"source": "48", "target": "67", "source_name": "pop music", "target_name": "rock art", "weight": 3.0, "year": 2018}, {"source": "48", "target": "69", "source_name": "pop music", "target_name": "classical music", "weight": 9.0, "year": 2018}, {"source": "48", "target": "70", "source_name": "pop music", "target_name": "world war", "weight": 2.0, "year": 2018}, {"source": "48", "target": "71", "source_name": "pop music", "target_name": "latin american", "weight": 1.0, "year": 2018}, {"source": "48", "target": "72", "source_name": "pop music", "target_name": "jimi hendrix", "weight": 3.0, "year": 2018}, {"source": "48", "target": "74", "source_name": "pop music", "target_name": "united states", "weight": 6.0, "year": 2018}, {"source": "48", "target": "76", "source_name": "pop music", "target_name": "los angeles", "weight": 1.0, "year": 2018}, {"source": "48", "target": "77", "source_name": "pop music", "target_name": "rock music", "weight": 38.0, "year": 2018}, {"source": "48", "target": "78", "source_name": "pop music", "target_name": "hip hop", "weight": 4.0, "year": 2018}, {"source": "48", "target": "79", "source_name": "pop music", "target_name": "popular culture", "weight": 6.0, "year": 2018}, {"source": "48", "target": "80", "source_name": "pop music", "target_name": "folk music", "weight": 7.0, "year": 2018}, {"source": "48", "target": "82", "source_name": "pop music", "target_name": "heavy metal", "weight": 2.0, "year": 2018}, {"source": "48", "target": "83", "source_name": "pop music", "target_name": "folk rock", "weight": 2.0, "year": 2018}, {"source": "48", "target": "87", "source_name": "pop music", "target_name": "music hall", "weight": 1.0, "year": 2018}, {"source": "49", "target": "53", "source_name": "music theory", "target_name": "popular music", "weight": 6.0, "year": 2018}, {"source": "49", "target": "54", "source_name": "music theory", "target_name": "american popular music", "weight": 1.0, "year": 2018}, {"source": "49", "target": "55", "source_name": "music theory", "target_name": "rock criticism", "weight": 1.0, "year": 2018}, {"source": "49", "target": "57", "source_name": "music theory", "target_name": "north america", "weight": 2.0, "year": 2018}, {"source": "49", "target": "61", "source_name": "music theory", "target_name": "progressive rock", "weight": 1.0, "year": 2018}, {"source": "49", "target": "69", "source_name": "music theory", "target_name": "classical music", "weight": 1.0, "year": 2018}, {"source": "49", "target": "72", "source_name": "music theory", "target_name": "jimi hendrix", "weight": 1.0, "year": 2018}, {"source": "49", "target": "77", "source_name": "music theory", "target_name": "rock music", "weight": 5.0, "year": 2018}, {"source": "49", "target": "78", "source_name": "music theory", "target_name": "hip hop", "weight": 1.0, "year": 2018}, {"source": "49", "target": "88", "source_name": "music theory", "target_name": "oxford university press", "weight": 2.0, "year": 2018}, {"source": "49", "target": "89", "source_name": "music theory", "target_name": "electronic music", "weight": 1.0, "year": 2018}, {"source": "50", "target": "53", "source_name": "hollywood film", "target_name": "popular music", "weight": 1.0, "year": 2018}, {"source": "50", "target": "60", "source_name": "hollywood film", "target_name": "cultural studies", "weight": 1.0, "year": 2018}, {"source": "50", "target": "79", "source_name": "hollywood film", "target_name": "popular culture", "weight": 1.0, "year": 2018}, {"source": "50", "target": "81", "source_name": "hollywood film", "target_name": "avant garde", "weight": 1.0, "year": 2018}, {"source": "50", "target": "88", "source_name": "hollywood film", "target_name": "oxford university press", "weight": 1.0, "year": 2018}, {"source": "51", "target": "52", "source_name": "cultural identity", "target_name": "folk song", "weight": 1.0, "year": 2018}, {"source": "51", "target": "53", "source_name": "cultural identity", "target_name": "popular music", "weight": 3.0, "year": 2018}, {"source": "51", "target": "60", "source_name": "cultural identity", "target_name": "cultural studies", "weight": 2.0, "year": 2018}, {"source": "51", "target": "65", "source_name": "cultural identity", "target_name": "country music", "weight": 1.0, "year": 2018}, {"source": "51", "target": "66", "source_name": "cultural identity", "target_name": "hong kong", "weight": 1.0, "year": 2018}, {"source": "51", "target": "72", "source_name": "cultural identity", "target_name": "jimi hendrix", "weight": 2.0, "year": 2018}, {"source": "51", "target": "74", "source_name": "cultural identity", "target_name": "united states", "weight": 2.0, "year": 2018}, {"source": "51", "target": "77", "source_name": "cultural identity", "target_name": "rock music", "weight": 7.0, "year": 2018}, {"source": "51", "target": "79", "source_name": "cultural identity", "target_name": "popular culture", "weight": 2.0, "year": 2018}, {"source": "51", "target": "80", "source_name": "cultural identity", "target_name": "folk music", "weight": 1.0, "year": 2018}, {"source": "51", "target": "82", "source_name": "cultural identity", "target_name": "heavy metal", "weight": 1.0, "year": 2018}, {"source": "52", "target": "53", "source_name": "folk song", "target_name": "popular music", "weight": 10.0, "year": 2018}, {"source": "52", "target": "54", "source_name": "folk song", "target_name": "american popular music", "weight": 2.0, "year": 2018}, {"source": "52", "target": "65", "source_name": "folk song", "target_name": "country music", "weight": 2.0, "year": 2018}, {"source": "52", "target": "66", "source_name": "folk song", "target_name": "hong kong", "weight": 1.0, "year": 2018}, {"source": "52", "target": "69", "source_name": "folk song", "target_name": "classical music", "weight": 2.0, "year": 2018}, {"source": "52", "target": "74", "source_name": "folk song", "target_name": "united states", "weight": 1.0, "year": 2018}, {"source": "52", "target": "77", "source_name": "folk song", "target_name": "rock music", "weight": 4.0, "year": 2018}, {"source": "52", "target": "80", "source_name": "folk song", "target_name": "folk music", "weight": 9.0, "year": 2018}, {"source": "52", "target": "87", "source_name": "folk song", "target_name": "music hall", "weight": 1.0, "year": 2018}, {"source": "52", "target": "89", "source_name": "folk song", "target_name": "electronic music", "weight": 1.0, "year": 2018}, {"source": "53", "target": "54", "source_name": "popular music", "target_name": "american popular music", "weight": 20.0, "year": 2018}, {"source": "53", "target": "55", "source_name": "popular music", "target_name": "rock criticism", "weight": 7.0, "year": 2018}, {"source": "53", "target": "56", "source_name": "popular music", "target_name": "bruce springsteen", "weight": 2.0, "year": 2018}, {"source": "53", "target": "57", "source_name": "popular music", "target_name": "north america", "weight": 9.0, "year": 2018}, {"source": "53", "target": "58", "source_name": "popular music", "target_name": "music therapy", "weight": 1.0, "year": 2018}, {"source": "53", "target": "59", "source_name": "popular music", "target_name": "college students", "weight": 3.0, "year": 2018}, {"source": "53", "target": "60", "source_name": "popular music", "target_name": "cultural studies", "weight": 10.0, "year": 2018}, {"source": "53", "target": "61", "source_name": "popular music", "target_name": "progressive rock", "weight": 16.0, "year": 2018}, {"source": "53", "target": "62", "source_name": "popular music", "target_name": "led zeppelin", "weight": 3.0, "year": 2018}, {"source": "53", "target": "64", "source_name": "popular music", "target_name": "english language", "weight": 2.0, "year": 2018}, {"source": "53", "target": "65", "source_name": "popular music", "target_name": "country music", "weight": 11.0, "year": 2018}, {"source": "53", "target": "66", "source_name": "popular music", "target_name": "hong kong", "weight": 4.0, "year": 2018}, {"source": "53", "target": "67", "source_name": "popular music", "target_name": "rock art", "weight": 9.0, "year": 2018}, {"source": "53", "target": "69", "source_name": "popular music", "target_name": "classical music", "weight": 19.0, "year": 2018}, {"source": "53", "target": "70", "source_name": "popular music", "target_name": "world war", "weight": 6.0, "year": 2018}, {"source": "53", "target": "71", "source_name": "popular music", "target_name": "latin american", "weight": 3.0, "year": 2018}, {"source": "53", "target": "72", "source_name": "popular music", "target_name": "jimi hendrix", "weight": 5.0, "year": 2018}, {"source": "53", "target": "73", "source_name": "popular music", "target_name": "southern rock", "weight": 2.0, "year": 2018}, {"source": "53", "target": "74", "source_name": "popular music", "target_name": "united states", "weight": 24.0, "year": 2018}, {"source": "53", "target": "75", "source_name": "popular music", "target_name": "world war ii", "weight": 4.0, "year": 2018}, {"source": "53", "target": "76", "source_name": "popular music", "target_name": "los angeles", "weight": 6.0, "year": 2018}, {"source": "53", "target": "77", "source_name": "popular music", "target_name": "rock music", "weight": 151.0, "year": 2018}, {"source": "53", "target": "78", "source_name": "popular music", "target_name": "hip hop", "weight": 12.0, "year": 2018}, {"source": "53", "target": "79", "source_name": "popular music", "target_name": "popular culture", "weight": 27.0, "year": 2018}, {"source": "53", "target": "80", "source_name": "popular music", "target_name": "folk music", "weight": 21.0, "year": 2018}, {"source": "53", "target": "82", "source_name": "popular music", "target_name": "heavy metal", "weight": 15.0, "year": 2018}, {"source": "53", "target": "83", "source_name": "popular music", "target_name": "folk rock", "weight": 3.0, "year": 2018}, {"source": "53", "target": "85", "source_name": "popular music", "target_name": "jewish music", "weight": 2.0, "year": 2018}, {"source": "53", "target": "87", "source_name": "popular music", "target_name": "music hall", "weight": 5.0, "year": 2018}, {"source": "53", "target": "88", "source_name": "popular music", "target_name": "oxford university press", "weight": 4.0, "year": 2018}, {"source": "53", "target": "89", "source_name": "popular music", "target_name": "electronic music", "weight": 10.0, "year": 2018}, {"source": "53", "target": "90", "source_name": "popular music", "target_name": "blues rock", "weight": 1.0, "year": 2018}, {"source": "54", "target": "55", "source_name": "american popular music", "target_name": "rock criticism", "weight": 1.0, "year": 2018}, {"source": "54", "target": "57", "source_name": "american popular music", "target_name": "north america", "weight": 2.0, "year": 2018}, {"source": "54", "target": "65", "source_name": "american popular music", "target_name": "country music", "weight": 5.0, "year": 2018}, {"source": "54", "target": "69", "source_name": "american popular music", "target_name": "classical music", "weight": 3.0, "year": 2018}, {"source": "54", "target": "70", "source_name": "american popular music", "target_name": "world war", "weight": 1.0, "year": 2018}, {"source": "54", "target": "71", "source_name": "american popular music", "target_name": "latin american", "weight": 1.0, "year": 2018}, {"source": "54", "target": "74", "source_name": "american popular music", "target_name": "united states", "weight": 5.0, "year": 2018}, {"source": "54", "target": "75", "source_name": "american popular music", "target_name": "world war ii", "weight": 1.0, "year": 2018}, {"source": "54", "target": "76", "source_name": "american popular music", "target_name": "los angeles", "weight": 1.0, "year": 2018}, {"source": "54", "target": "77", "source_name": "american popular music", "target_name": "rock music", "weight": 7.0, "year": 2018}, {"source": "54", "target": "78", "source_name": "american popular music", "target_name": "hip hop", "weight": 2.0, "year": 2018}, {"source": "54", "target": "79", "source_name": "american popular music", "target_name": "popular culture", "weight": 1.0, "year": 2018}, {"source": "54", "target": "80", "source_name": "american popular music", "target_name": "folk music", "weight": 1.0, "year": 2018}, {"source": "54", "target": "88", "source_name": "american popular music", "target_name": "oxford university press", "weight": 1.0, "year": 2018}, {"source": "54", "target": "89", "source_name": "american popular music", "target_name": "electronic music", "weight": 1.0, "year": 2018}, {"source": "55", "target": "56", "source_name": "rock criticism", "target_name": "bruce springsteen", "weight": 1.0, "year": 2018}, {"source": "55", "target": "57", "source_name": "rock criticism", "target_name": "north america", "weight": 1.0, "year": 2018}, {"source": "55", "target": "61", "source_name": "rock criticism", "target_name": "progressive rock", "weight": 3.0, "year": 2018}, {"source": "55", "target": "62", "source_name": "rock criticism", "target_name": "led zeppelin", "weight": 1.0, "year": 2018}, {"source": "55", "target": "65", "source_name": "rock criticism", "target_name": "country music", "weight": 1.0, "year": 2018}, {"source": "55", "target": "69", "source_name": "rock criticism", "target_name": "classical music", "weight": 1.0, "year": 2018}, {"source": "55", "target": "74", "source_name": "rock criticism", "target_name": "united states", "weight": 2.0, "year": 2018}, {"source": "55", "target": "77", "source_name": "rock criticism", "target_name": "rock music", "weight": 5.0, "year": 2018}, {"source": "55", "target": "78", "source_name": "rock criticism", "target_name": "hip hop", "weight": 1.0, "year": 2018}, {"source": "55", "target": "79", "source_name": "rock criticism", "target_name": "popular culture", "weight": 1.0, "year": 2018}, {"source": "55", "target": "82", "source_name": "rock criticism", "target_name": "heavy metal", "weight": 1.0, "year": 2018}, {"source": "55", "target": "88", "source_name": "rock criticism", "target_name": "oxford university press", "weight": 1.0, "year": 2018}, {"source": "56", "target": "72", "source_name": "bruce springsteen", "target_name": "jimi hendrix", "weight": 1.0, "year": 2018}, {"source": "56", "target": "77", "source_name": "bruce springsteen", "target_name": "rock music", "weight": 2.0, "year": 2018}, {"source": "56", "target": "78", "source_name": "bruce springsteen", "target_name": "hip hop", "weight": 1.0, "year": 2018}, {"source": "56", "target": "79", "source_name": "bruce springsteen", "target_name": "popular culture", "weight": 2.0, "year": 2018}, {"source": "56", "target": "82", "source_name": "bruce springsteen", "target_name": "heavy metal", "weight": 1.0, "year": 2018}, {"source": "57", "target": "61", "source_name": "north america", "target_name": "progressive rock", "weight": 1.0, "year": 2018}, {"source": "57", "target": "65", "source_name": "north america", "target_name": "country music", "weight": 2.0, "year": 2018}, {"source": "57", "target": "71", "source_name": "north america", "target_name": "latin american", "weight": 1.0, "year": 2018}, {"source": "57", "target": "73", "source_name": "north america", "target_name": "southern rock", "weight": 1.0, "year": 2018}, {"source": "57", "target": "74", "source_name": "north america", "target_name": "united states", "weight": 3.0, "year": 2018}, {"source": "57", "target": "77", "source_name": "north america", "target_name": "rock music", "weight": 8.0, "year": 2018}, {"source": "57", "target": "78", "source_name": "north america", "target_name": "hip hop", "weight": 1.0, "year": 2018}, {"source": "57", "target": "80", "source_name": "north america", "target_name": "folk music", "weight": 2.0, "year": 2018}, {"source": "57", "target": "82", "source_name": "north america", "target_name": "heavy metal", "weight": 1.0, "year": 2018}, {"source": "58", "target": "64", "source_name": "music therapy", "target_name": "english language", "weight": 1.0, "year": 2018}, {"source": "58", "target": "74", "source_name": "music therapy", "target_name": "united states", "weight": 1.0, "year": 2018}, {"source": "58", "target": "77", "source_name": "music therapy", "target_name": "rock music", "weight": 3.0, "year": 2018}, {"source": "59", "target": "69", "source_name": "college students", "target_name": "classical music", "weight": 1.0, "year": 2018}, {"source": "59", "target": "74", "source_name": "college students", "target_name": "united states", "weight": 1.0, "year": 2018}, {"source": "59", "target": "77", "source_name": "college students", "target_name": "rock music", "weight": 5.0, "year": 2018}, {"source": "59", "target": "82", "source_name": "college students", "target_name": "heavy metal", "weight": 2.0, "year": 2018}, {"source": "60", "target": "61", "source_name": "cultural studies", "target_name": "progressive rock", "weight": 1.0, "year": 2018}, {"source": "60", "target": "62", "source_name": "cultural studies", "target_name": "led zeppelin", "weight": 1.0, "year": 2018}, {"source": "60", "target": "71", "source_name": "cultural studies", "target_name": "latin american", "weight": 1.0, "year": 2018}, {"source": "60", "target": "74", "source_name": "cultural studies", "target_name": "united states", "weight": 1.0, "year": 2018}, {"source": "60", "target": "76", "source_name": "cultural studies", "target_name": "los angeles", "weight": 1.0, "year": 2018}, {"source": "60", "target": "77", "source_name": "cultural studies", "target_name": "rock music", "weight": 9.0, "year": 2018}, {"source": "60", "target": "79", "source_name": "cultural studies", "target_name": "popular culture", "weight": 6.0, "year": 2018}, {"source": "60", "target": "80", "source_name": "cultural studies", "target_name": "folk music", "weight": 2.0, "year": 2018}, {"source": "60", "target": "81", "source_name": "cultural studies", "target_name": "avant garde", "weight": 1.0, "year": 2018}, {"source": "60", "target": "85", "source_name": "cultural studies", "target_name": "jewish music", "weight": 1.0, "year": 2018}, {"source": "60", "target": "87", "source_name": "cultural studies", "target_name": "music hall", "weight": 1.0, "year": 2018}, {"source": "60", "target": "88", "source_name": "cultural studies", "target_name": "oxford university press", "weight": 4.0, "year": 2018}, {"source": "60", "target": "89", "source_name": "cultural studies", "target_name": "electronic music", "weight": 1.0, "year": 2018}, {"source": "61", "target": "62", "source_name": "progressive rock", "target_name": "led zeppelin", "weight": 1.0, "year": 2018}, {"source": "61", "target": "69", "source_name": "progressive rock", "target_name": "classical music", "weight": 3.0, "year": 2018}, {"source": "61", "target": "72", "source_name": "progressive rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2018}, {"source": "61", "target": "74", "source_name": "progressive rock", "target_name": "united states", "weight": 3.0, "year": 2018}, {"source": "61", "target": "77", "source_name": "progressive rock", "target_name": "rock music", "weight": 25.0, "year": 2018}, {"source": "61", "target": "80", "source_name": "progressive rock", "target_name": "folk music", "weight": 3.0, "year": 2018}, {"source": "61", "target": "82", "source_name": "progressive rock", "target_name": "heavy metal", "weight": 3.0, "year": 2018}, {"source": "61", "target": "83", "source_name": "progressive rock", "target_name": "folk rock", "weight": 1.0, "year": 2018}, {"source": "61", "target": "88", "source_name": "progressive rock", "target_name": "oxford university press", "weight": 1.0, "year": 2018}, {"source": "61", "target": "89", "source_name": "progressive rock", "target_name": "electronic music", "weight": 1.0, "year": 2018}, {"source": "62", "target": "67", "source_name": "led zeppelin", "target_name": "rock art", "weight": 1.0, "year": 2018}, {"source": "62", "target": "69", "source_name": "led zeppelin", "target_name": "classical music", "weight": 2.0, "year": 2018}, {"source": "62", "target": "72", "source_name": "led zeppelin", "target_name": "jimi hendrix", "weight": 2.0, "year": 2018}, {"source": "62", "target": "74", "source_name": "led zeppelin", "target_name": "united states", "weight": 1.0, "year": 2018}, {"source": "62", "target": "77", "source_name": "led zeppelin", "target_name": "rock music", "weight": 4.0, "year": 2018}, {"source": "62", "target": "78", "source_name": "led zeppelin", "target_name": "hip hop", "weight": 1.0, "year": 2018}, {"source": "62", "target": "80", "source_name": "led zeppelin", "target_name": "folk music", "weight": 1.0, "year": 2018}, {"source": "62", "target": "82", "source_name": "led zeppelin", "target_name": "heavy metal", "weight": 2.0, "year": 2018}, {"source": "62", "target": "88", "source_name": "led zeppelin", "target_name": "oxford university press", "weight": 1.0, "year": 2018}, {"source": "64", "target": "66", "source_name": "english language", "target_name": "hong kong", "weight": 1.0, "year": 2018}, {"source": "64", "target": "67", "source_name": "english language", "target_name": "rock art", "weight": 1.0, "year": 2018}, {"source": "64", "target": "70", "source_name": "english language", "target_name": "world war", "weight": 1.0, "year": 2018}, {"source": "64", "target": "74", "source_name": "english language", "target_name": "united states", "weight": 2.0, "year": 2018}, {"source": "64", "target": "77", "source_name": "english language", "target_name": "rock music", "weight": 2.0, "year": 2018}, {"source": "64", "target": "79", "source_name": "english language", "target_name": "popular culture", "weight": 1.0, "year": 2018}, {"source": "64", "target": "83", "source_name": "english language", "target_name": "folk rock", "weight": 1.0, "year": 2018}, {"source": "65", "target": "69", "source_name": "country music", "target_name": "classical music", "weight": 4.0, "year": 2018}, {"source": "65", "target": "72", "source_name": "country music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2018}, {"source": "65", "target": "73", "source_name": "country music", "target_name": "southern rock", "weight": 2.0, "year": 2018}, {"source": "65", "target": "74", "source_name": "country music", "target_name": "united states", "weight": 3.0, "year": 2018}, {"source": "65", "target": "77", "source_name": "country music", "target_name": "rock music", "weight": 5.0, "year": 2018}, {"source": "65", "target": "78", "source_name": "country music", "target_name": "hip hop", "weight": 1.0, "year": 2018}, {"source": "65", "target": "79", "source_name": "country music", "target_name": "popular culture", "weight": 2.0, "year": 2018}, {"source": "65", "target": "80", "source_name": "country music", "target_name": "folk music", "weight": 4.0, "year": 2018}, {"source": "65", "target": "82", "source_name": "country music", "target_name": "heavy metal", "weight": 2.0, "year": 2018}, {"source": "65", "target": "89", "source_name": "country music", "target_name": "electronic music", "weight": 2.0, "year": 2018}, {"source": "66", "target": "67", "source_name": "hong kong", "target_name": "rock art", "weight": 1.0, "year": 2018}, {"source": "66", "target": "77", "source_name": "hong kong", "target_name": "rock music", "weight": 2.0, "year": 2018}, {"source": "66", "target": "78", "source_name": "hong kong", "target_name": "hip hop", "weight": 1.0, "year": 2018}, {"source": "66", "target": "80", "source_name": "hong kong", "target_name": "folk music", "weight": 1.0, "year": 2018}, {"source": "66", "target": "83", "source_name": "hong kong", "target_name": "folk rock", "weight": 1.0, "year": 2018}, {"source": "66", "target": "85", "source_name": "hong kong", "target_name": "jewish music", "weight": 1.0, "year": 2018}, {"source": "67", "target": "69", "source_name": "rock art", "target_name": "classical music", "weight": 1.0, "year": 2018}, {"source": "67", "target": "74", "source_name": "rock art", "target_name": "united states", "weight": 1.0, "year": 2018}, {"source": "67", "target": "77", "source_name": "rock art", "target_name": "rock music", "weight": 10.0, "year": 2018}, {"source": "67", "target": "79", "source_name": "rock art", "target_name": "popular culture", "weight": 1.0, "year": 2018}, {"source": "67", "target": "80", "source_name": "rock art", "target_name": "folk music", "weight": 1.0, "year": 2018}, {"source": "67", "target": "82", "source_name": "rock art", "target_name": "heavy metal", "weight": 1.0, "year": 2018}, {"source": "67", "target": "83", "source_name": "rock art", "target_name": "folk rock", "weight": 1.0, "year": 2018}, {"source": "67", "target": "89", "source_name": "rock art", "target_name": "electronic music", "weight": 1.0, "year": 2018}, {"source": "68", "target": "69", "source_name": "hearing loss", "target_name": "classical music", "weight": 1.0, "year": 2018}, {"source": "68", "target": "77", "source_name": "hearing loss", "target_name": "rock music", "weight": 3.0, "year": 2018}, {"source": "69", "target": "70", "source_name": "classical music", "target_name": "world war", "weight": 2.0, "year": 2018}, {"source": "69", "target": "71", "source_name": "classical music", "target_name": "latin american", "weight": 1.0, "year": 2018}, {"source": "69", "target": "72", "source_name": "classical music", "target_name": "jimi hendrix", "weight": 2.0, "year": 2018}, {"source": "69", "target": "74", "source_name": "classical music", "target_name": "united states", "weight": 6.0, "year": 2018}, {"source": "69", "target": "75", "source_name": "classical music", "target_name": "world war ii", "weight": 1.0, "year": 2018}, {"source": "69", "target": "76", "source_name": "classical music", "target_name": "los angeles", "weight": 1.0, "year": 2018}, {"source": "69", "target": "77", "source_name": "classical music", "target_name": "rock music", "weight": 42.0, "year": 2018}, {"source": "69", "target": "78", "source_name": "classical music", "target_name": "hip hop", "weight": 2.0, "year": 2018}, {"source": "69", "target": "79", "source_name": "classical music", "target_name": "popular culture", "weight": 4.0, "year": 2018}, {"source": "69", "target": "80", "source_name": "classical music", "target_name": "folk music", "weight": 5.0, "year": 2018}, {"source": "69", "target": "82", "source_name": "classical music", "target_name": "heavy metal", "weight": 3.0, "year": 2018}, {"source": "69", "target": "87", "source_name": "classical music", "target_name": "music hall", "weight": 2.0, "year": 2018}, {"source": "69", "target": "88", "source_name": "classical music", "target_name": "oxford university press", "weight": 1.0, "year": 2018}, {"source": "69", "target": "89", "source_name": "classical music", "target_name": "electronic music", "weight": 4.0, "year": 2018}, {"source": "70", "target": "74", "source_name": "world war", "target_name": "united states", "weight": 2.0, "year": 2018}, {"source": "70", "target": "75", "source_name": "world war", "target_name": "world war ii", "weight": 6.0, "year": 2018}, {"source": "70", "target": "77", "source_name": "world war", "target_name": "rock music", "weight": 6.0, "year": 2018}, {"source": "70", "target": "79", "source_name": "world war", "target_name": "popular culture", "weight": 1.0, "year": 2018}, {"source": "70", "target": "80", "source_name": "world war", "target_name": "folk music", "weight": 1.0, "year": 2018}, {"source": "70", "target": "87", "source_name": "world war", "target_name": "music hall", "weight": 1.0, "year": 2018}, {"source": "70", "target": "89", "source_name": "world war", "target_name": "electronic music", "weight": 1.0, "year": 2018}, {"source": "71", "target": "74", "source_name": "latin american", "target_name": "united states", "weight": 4.0, "year": 2018}, {"source": "71", "target": "76", "source_name": "latin american", "target_name": "los angeles", "weight": 2.0, "year": 2018}, {"source": "71", "target": "77", "source_name": "latin american", "target_name": "rock music", "weight": 5.0, "year": 2018}, {"source": "71", "target": "79", "source_name": "latin american", "target_name": "popular culture", "weight": 1.0, "year": 2018}, {"source": "72", "target": "74", "source_name": "jimi hendrix", "target_name": "united states", "weight": 2.0, "year": 2018}, {"source": "72", "target": "77", "source_name": "jimi hendrix", "target_name": "rock music", "weight": 8.0, "year": 2018}, {"source": "72", "target": "79", "source_name": "jimi hendrix", "target_name": "popular culture", "weight": 2.0, "year": 2018}, {"source": "72", "target": "80", "source_name": "jimi hendrix", "target_name": "folk music", "weight": 1.0, "year": 2018}, {"source": "72", "target": "89", "source_name": "jimi hendrix", "target_name": "electronic music", "weight": 1.0, "year": 2018}, {"source": "73", "target": "77", "source_name": "southern rock", "target_name": "rock music", "weight": 1.0, "year": 2018}, {"source": "73", "target": "80", "source_name": "southern rock", "target_name": "folk music", "weight": 1.0, "year": 2018}, {"source": "74", "target": "76", "source_name": "united states", "target_name": "los angeles", "weight": 1.0, "year": 2018}, {"source": "74", "target": "77", "source_name": "united states", "target_name": "rock music", "weight": 17.0, "year": 2018}, {"source": "74", "target": "78", "source_name": "united states", "target_name": "hip hop", "weight": 1.0, "year": 2018}, {"source": "74", "target": "79", "source_name": "united states", "target_name": "popular culture", "weight": 3.0, "year": 2018}, {"source": "74", "target": "80", "source_name": "united states", "target_name": "folk music", "weight": 4.0, "year": 2018}, {"source": "74", "target": "88", "source_name": "united states", "target_name": "oxford university press", "weight": 1.0, "year": 2018}, {"source": "74", "target": "89", "source_name": "united states", "target_name": "electronic music", "weight": 3.0, "year": 2018}, {"source": "75", "target": "76", "source_name": "world war ii", "target_name": "los angeles", "weight": 1.0, "year": 2018}, {"source": "75", "target": "77", "source_name": "world war ii", "target_name": "rock music", "weight": 3.0, "year": 2018}, {"source": "75", "target": "80", "source_name": "world war ii", "target_name": "folk music", "weight": 1.0, "year": 2018}, {"source": "76", "target": "77", "source_name": "los angeles", "target_name": "rock music", "weight": 8.0, "year": 2018}, {"source": "76", "target": "79", "source_name": "los angeles", "target_name": "popular culture", "weight": 1.0, "year": 2018}, {"source": "76", "target": "80", "source_name": "los angeles", "target_name": "folk music", "weight": 2.0, "year": 2018}, {"source": "77", "target": "78", "source_name": "rock music", "target_name": "hip hop", "weight": 5.0, "year": 2018}, {"source": "77", "target": "79", "source_name": "rock music", "target_name": "popular culture", "weight": 24.0, "year": 2018}, {"source": "77", "target": "80", "source_name": "rock music", "target_name": "folk music", "weight": 15.0, "year": 2018}, {"source": "77", "target": "82", "source_name": "rock music", "target_name": "heavy metal", "weight": 19.0, "year": 2018}, {"source": "77", "target": "83", "source_name": "rock music", "target_name": "folk rock", "weight": 3.0, "year": 2018}, {"source": "77", "target": "87", "source_name": "rock music", "target_name": "music hall", "weight": 5.0, "year": 2018}, {"source": "77", "target": "88", "source_name": "rock music", "target_name": "oxford university press", "weight": 2.0, "year": 2018}, {"source": "77", "target": "89", "source_name": "rock music", "target_name": "electronic music", "weight": 6.0, "year": 2018}, {"source": "77", "target": "90", "source_name": "rock music", "target_name": "blues rock", "weight": 1.0, "year": 2018}, {"source": "78", "target": "79", "source_name": "hip hop", "target_name": "popular culture", "weight": 2.0, "year": 2018}, {"source": "78", "target": "80", "source_name": "hip hop", "target_name": "folk music", "weight": 3.0, "year": 2018}, {"source": "78", "target": "82", "source_name": "hip hop", "target_name": "heavy metal", "weight": 2.0, "year": 2018}, {"source": "78", "target": "85", "source_name": "hip hop", "target_name": "jewish music", "weight": 1.0, "year": 2018}, {"source": "78", "target": "88", "source_name": "hip hop", "target_name": "oxford university press", "weight": 1.0, "year": 2018}, {"source": "78", "target": "89", "source_name": "hip hop", "target_name": "electronic music", "weight": 1.0, "year": 2018}, {"source": "78", "target": "90", "source_name": "hip hop", "target_name": "blues rock", "weight": 1.0, "year": 2018}, {"source": "79", "target": "80", "source_name": "popular culture", "target_name": "folk music", "weight": 3.0, "year": 2018}, {"source": "79", "target": "82", "source_name": "popular culture", "target_name": "heavy metal", "weight": 3.0, "year": 2018}, {"source": "79", "target": "85", "source_name": "popular culture", "target_name": "jewish music", "weight": 1.0, "year": 2018}, {"source": "79", "target": "87", "source_name": "popular culture", "target_name": "music hall", "weight": 3.0, "year": 2018}, {"source": "79", "target": "88", "source_name": "popular culture", "target_name": "oxford university press", "weight": 1.0, "year": 2018}, {"source": "79", "target": "89", "source_name": "popular culture", "target_name": "electronic music", "weight": 1.0, "year": 2018}, {"source": "80", "target": "82", "source_name": "folk music", "target_name": "heavy metal", "weight": 1.0, "year": 2018}, {"source": "80", "target": "85", "source_name": "folk music", "target_name": "jewish music", "weight": 2.0, "year": 2018}, {"source": "80", "target": "87", "source_name": "folk music", "target_name": "music hall", "weight": 3.0, "year": 2018}, {"source": "80", "target": "88", "source_name": "folk music", "target_name": "oxford university press", "weight": 1.0, "year": 2018}, {"source": "80", "target": "89", "source_name": "folk music", "target_name": "electronic music", "weight": 3.0, "year": 2018}, {"source": "81", "target": "88", "source_name": "avant garde", "target_name": "oxford university press", "weight": 1.0, "year": 2018}, {"source": "82", "target": "83", "source_name": "heavy metal", "target_name": "folk rock", "weight": 2.0, "year": 2018}, {"source": "85", "target": "88", "source_name": "jewish music", "target_name": "oxford university press", "weight": 1.0, "year": 2018}, {"source": "88", "target": "89", "source_name": "oxford university press", "target_name": "electronic music", "weight": 1.0, "year": 2018}]}, {"2019": [{"source": "1", "target": "6", "source_name": "rock star", "target_name": "elvis presley", "weight": 1.0, "year": 2019}, {"source": "1", "target": "7", "source_name": "rock star", "target_name": "nineteenth century", "weight": 1.0, "year": 2019}, {"source": "1", "target": "9", "source_name": "rock star", "target_name": "compact disc", "weight": 1.0, "year": 2019}, {"source": "1", "target": "16", "source_name": "rock star", "target_name": "bob dylan", "weight": 1.0, "year": 2019}, {"source": "1", "target": "19", "source_name": "rock star", "target_name": "music video", "weight": 1.0, "year": 2019}, {"source": "1", "target": "23", "source_name": "rock star", "target_name": "electronic dance music", "weight": 1.0, "year": 2019}, {"source": "1", "target": "24", "source_name": "rock star", "target_name": "punk rock", "weight": 1.0, "year": 2019}, {"source": "1", "target": "28", "source_name": "rock star", "target_name": "high school", "weight": 1.0, "year": 2019}, {"source": "1", "target": "29", "source_name": "rock star", "target_name": "rolling stone", "weight": 2.0, "year": 2019}, {"source": "1", "target": "36", "source_name": "rock star", "target_name": "music industry", "weight": 4.0, "year": 2019}, {"source": "1", "target": "41", "source_name": "rock star", "target_name": "youth culture", "weight": 2.0, "year": 2019}, {"source": "1", "target": "42", "source_name": "rock star", "target_name": "simon frith", "weight": 1.0, "year": 2019}, {"source": "1", "target": "48", "source_name": "rock star", "target_name": "pop music", "weight": 4.0, "year": 2019}, {"source": "1", "target": "51", "source_name": "rock star", "target_name": "cultural identity", "weight": 2.0, "year": 2019}, {"source": "1", "target": "53", "source_name": "rock star", "target_name": "popular music", "weight": 7.0, "year": 2019}, {"source": "1", "target": "56", "source_name": "rock star", "target_name": "bruce springsteen", "weight": 1.0, "year": 2019}, {"source": "1", "target": "57", "source_name": "rock star", "target_name": "north america", "weight": 1.0, "year": 2019}, {"source": "1", "target": "60", "source_name": "rock star", "target_name": "cultural studies", "weight": 1.0, "year": 2019}, {"source": "1", "target": "67", "source_name": "rock star", "target_name": "rock art", "weight": 1.0, "year": 2019}, {"source": "1", "target": "69", "source_name": "rock star", "target_name": "classical music", "weight": 1.0, "year": 2019}, {"source": "1", "target": "74", "source_name": "rock star", "target_name": "united states", "weight": 1.0, "year": 2019}, {"source": "1", "target": "77", "source_name": "rock star", "target_name": "rock music", "weight": 11.0, "year": 2019}, {"source": "1", "target": "79", "source_name": "rock star", "target_name": "popular culture", "weight": 2.0, "year": 2019}, {"source": "1", "target": "82", "source_name": "rock star", "target_name": "heavy metal", "weight": 3.0, "year": 2019}, {"source": "1", "target": "89", "source_name": "rock star", "target_name": "electronic music", "weight": 1.0, "year": 2019}, {"source": "2", "target": "3", "source_name": "indie rock", "target_name": "glam rock", "weight": 1.0, "year": 2019}, {"source": "2", "target": "19", "source_name": "indie rock", "target_name": "music video", "weight": 1.0, "year": 2019}, {"source": "2", "target": "20", "source_name": "indie rock", "target_name": "garage rock", "weight": 1.0, "year": 2019}, {"source": "2", "target": "24", "source_name": "indie rock", "target_name": "punk rock", "weight": 1.0, "year": 2019}, {"source": "2", "target": "27", "source_name": "indie rock", "target_name": "pop rock", "weight": 1.0, "year": 2019}, {"source": "2", "target": "30", "source_name": "indie rock", "target_name": "rock band", "weight": 2.0, "year": 2019}, {"source": "2", "target": "36", "source_name": "indie rock", "target_name": "music industry", "weight": 1.0, "year": 2019}, {"source": "2", "target": "44", "source_name": "indie rock", "target_name": "alternative rock", "weight": 1.0, "year": 2019}, {"source": "2", "target": "47", "source_name": "indie rock", "target_name": "hard rock", "weight": 1.0, "year": 2019}, {"source": "2", "target": "48", "source_name": "indie rock", "target_name": "pop music", "weight": 2.0, "year": 2019}, {"source": "2", "target": "51", "source_name": "indie rock", "target_name": "cultural identity", "weight": 1.0, "year": 2019}, {"source": "2", "target": "53", "source_name": "indie rock", "target_name": "popular music", "weight": 2.0, "year": 2019}, {"source": "2", "target": "67", "source_name": "indie rock", "target_name": "rock art", "weight": 2.0, "year": 2019}, {"source": "2", "target": "69", "source_name": "indie rock", "target_name": "classical music", "weight": 1.0, "year": 2019}, {"source": "2", "target": "72", "source_name": "indie rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2019}, {"source": "2", "target": "74", "source_name": "indie rock", "target_name": "united states", "weight": 1.0, "year": 2019}, {"source": "2", "target": "77", "source_name": "indie rock", "target_name": "rock music", "weight": 6.0, "year": 2019}, {"source": "2", "target": "78", "source_name": "indie rock", "target_name": "hip hop", "weight": 1.0, "year": 2019}, {"source": "2", "target": "80", "source_name": "indie rock", "target_name": "folk music", "weight": 1.0, "year": 2019}, {"source": "3", "target": "20", "source_name": "glam rock", "target_name": "garage rock", "weight": 2.0, "year": 2019}, {"source": "3", "target": "24", "source_name": "glam rock", "target_name": "punk rock", "weight": 2.0, "year": 2019}, {"source": "3", "target": "27", "source_name": "glam rock", "target_name": "pop rock", "weight": 1.0, "year": 2019}, {"source": "3", "target": "41", "source_name": "glam rock", "target_name": "youth culture", "weight": 1.0, "year": 2019}, {"source": "3", "target": "44", "source_name": "glam rock", "target_name": "alternative rock", "weight": 1.0, "year": 2019}, {"source": "3", "target": "47", "source_name": "glam rock", "target_name": "hard rock", "weight": 1.0, "year": 2019}, {"source": "3", "target": "53", "source_name": "glam rock", "target_name": "popular music", "weight": 1.0, "year": 2019}, {"source": "3", "target": "77", "source_name": "glam rock", "target_name": "rock music", "weight": 3.0, "year": 2019}, {"source": "3", "target": "79", "source_name": "glam rock", "target_name": "popular culture", "weight": 2.0, "year": 2019}, {"source": "3", "target": "87", "source_name": "glam rock", "target_name": "music hall", "weight": 1.0, "year": 2019}, {"source": "4", "target": "7", "source_name": "gregorian chant", "target_name": "nineteenth century", "weight": 1.0, "year": 2019}, {"source": "4", "target": "9", "source_name": "gregorian chant", "target_name": "compact disc", "weight": 1.0, "year": 2019}, {"source": "4", "target": "10", "source_name": "gregorian chant", "target_name": "african american", "weight": 1.0, "year": 2019}, {"source": "4", "target": "19", "source_name": "gregorian chant", "target_name": "music video", "weight": 1.0, "year": 2019}, {"source": "4", "target": "22", "source_name": "gregorian chant", "target_name": "chamber music", "weight": 1.0, "year": 2019}, {"source": "4", "target": "36", "source_name": "gregorian chant", "target_name": "music industry", "weight": 1.0, "year": 2019}, {"source": "4", "target": "37", "source_name": "gregorian chant", "target_name": "middle ages", "weight": 1.0, "year": 2019}, {"source": "4", "target": "38", "source_name": "gregorian chant", "target_name": "summary additional listening", "weight": 1.0, "year": 2019}, {"source": "4", "target": "40", "source_name": "gregorian chant", "target_name": "musical instruments", "weight": 1.0, "year": 2019}, {"source": "4", "target": "48", "source_name": "gregorian chant", "target_name": "pop music", "weight": 1.0, "year": 2019}, {"source": "4", "target": "52", "source_name": "gregorian chant", "target_name": "folk song", "weight": 1.0, "year": 2019}, {"source": "4", "target": "53", "source_name": "gregorian chant", "target_name": "popular music", "weight": 1.0, "year": 2019}, {"source": "4", "target": "54", "source_name": "gregorian chant", "target_name": "american popular music", "weight": 1.0, "year": 2019}, {"source": "4", "target": "65", "source_name": "gregorian chant", "target_name": "country music", "weight": 1.0, "year": 2019}, {"source": "4", "target": "69", "source_name": "gregorian chant", "target_name": "classical music", "weight": 1.0, "year": 2019}, {"source": "4", "target": "74", "source_name": "gregorian chant", "target_name": "united states", "weight": 1.0, "year": 2019}, {"source": "4", "target": "80", "source_name": "gregorian chant", "target_name": "folk music", "weight": 1.0, "year": 2019}, {"source": "4", "target": "89", "source_name": "gregorian chant", "target_name": "electronic music", "weight": 1.0, "year": 2019}, {"source": "5", "target": "12", "source_name": "jesus christ superstar", "target_name": "rock opera", "weight": 3.0, "year": 2019}, {"source": "5", "target": "15", "source_name": "jesus christ superstar", "target_name": "musical theatre", "weight": 3.0, "year": 2019}, {"source": "5", "target": "33", "source_name": "jesus christ superstar", "target_name": "jesus christ", "weight": 5.0, "year": 2019}, {"source": "5", "target": "34", "source_name": "jesus christ superstar", "target_name": "mass media", "weight": 1.0, "year": 2019}, {"source": "5", "target": "41", "source_name": "jesus christ superstar", "target_name": "youth culture", "weight": 1.0, "year": 2019}, {"source": "5", "target": "53", "source_name": "jesus christ superstar", "target_name": "popular music", "weight": 1.0, "year": 2019}, {"source": "5", "target": "77", "source_name": "jesus christ superstar", "target_name": "rock music", "weight": 7.0, "year": 2019}, {"source": "6", "target": "10", "source_name": "elvis presley", "target_name": "african american", "weight": 1.0, "year": 2019}, {"source": "6", "target": "16", "source_name": "elvis presley", "target_name": "bob dylan", "weight": 4.0, "year": 2019}, {"source": "6", "target": "17", "source_name": "elvis presley", "target_name": "civil rights", "weight": 1.0, "year": 2019}, {"source": "6", "target": "23", "source_name": "elvis presley", "target_name": "electronic dance music", "weight": 1.0, "year": 2019}, {"source": "6", "target": "29", "source_name": "elvis presley", "target_name": "rolling stone", "weight": 2.0, "year": 2019}, {"source": "6", "target": "36", "source_name": "elvis presley", "target_name": "music industry", "weight": 3.0, "year": 2019}, {"source": "6", "target": "40", "source_name": "elvis presley", "target_name": "musical instruments", "weight": 1.0, "year": 2019}, {"source": "6", "target": "41", "source_name": "elvis presley", "target_name": "youth culture", "weight": 1.0, "year": 2019}, {"source": "6", "target": "42", "source_name": "elvis presley", "target_name": "simon frith", "weight": 2.0, "year": 2019}, {"source": "6", "target": "47", "source_name": "elvis presley", "target_name": "hard rock", "weight": 1.0, "year": 2019}, {"source": "6", "target": "48", "source_name": "elvis presley", "target_name": "pop music", "weight": 1.0, "year": 2019}, {"source": "6", "target": "49", "source_name": "elvis presley", "target_name": "music theory", "weight": 1.0, "year": 2019}, {"source": "6", "target": "51", "source_name": "elvis presley", "target_name": "cultural identity", "weight": 1.0, "year": 2019}, {"source": "6", "target": "53", "source_name": "elvis presley", "target_name": "popular music", "weight": 9.0, "year": 2019}, {"source": "6", "target": "54", "source_name": "elvis presley", "target_name": "american popular music", "weight": 3.0, "year": 2019}, {"source": "6", "target": "56", "source_name": "elvis presley", "target_name": "bruce springsteen", "weight": 2.0, "year": 2019}, {"source": "6", "target": "60", "source_name": "elvis presley", "target_name": "cultural studies", "weight": 1.0, "year": 2019}, {"source": "6", "target": "67", "source_name": "elvis presley", "target_name": "rock art", "weight": 1.0, "year": 2019}, {"source": "6", "target": "70", "source_name": "elvis presley", "target_name": "world war", "weight": 1.0, "year": 2019}, {"source": "6", "target": "72", "source_name": "elvis presley", "target_name": "jimi hendrix", "weight": 1.0, "year": 2019}, {"source": "6", "target": "74", "source_name": "elvis presley", "target_name": "united states", "weight": 2.0, "year": 2019}, {"source": "6", "target": "75", "source_name": "elvis presley", "target_name": "world war ii", "weight": 1.0, "year": 2019}, {"source": "6", "target": "77", "source_name": "elvis presley", "target_name": "rock music", "weight": 5.0, "year": 2019}, {"source": "6", "target": "78", "source_name": "elvis presley", "target_name": "hip hop", "weight": 1.0, "year": 2019}, {"source": "6", "target": "79", "source_name": "elvis presley", "target_name": "popular culture", "weight": 2.0, "year": 2019}, {"source": "6", "target": "80", "source_name": "elvis presley", "target_name": "folk music", "weight": 1.0, "year": 2019}, {"source": "6", "target": "82", "source_name": "elvis presley", "target_name": "heavy metal", "weight": 1.0, "year": 2019}, {"source": "7", "target": "9", "source_name": "nineteenth century", "target_name": "compact disc", "weight": 1.0, "year": 2019}, {"source": "7", "target": "10", "source_name": "nineteenth century", "target_name": "african american", "weight": 1.0, "year": 2019}, {"source": "7", "target": "19", "source_name": "nineteenth century", "target_name": "music video", "weight": 1.0, "year": 2019}, {"source": "7", "target": "22", "source_name": "nineteenth century", "target_name": "chamber music", "weight": 1.0, "year": 2019}, {"source": "7", "target": "34", "source_name": "nineteenth century", "target_name": "mass media", "weight": 1.0, "year": 2019}, {"source": "7", "target": "35", "source_name": "nineteenth century", "target_name": "ancient greek", "weight": 1.0, "year": 2019}, {"source": "7", "target": "36", "source_name": "nineteenth century", "target_name": "music industry", "weight": 2.0, "year": 2019}, {"source": "7", "target": "38", "source_name": "nineteenth century", "target_name": "summary additional listening", "weight": 1.0, "year": 2019}, {"source": "7", "target": "40", "source_name": "nineteenth century", "target_name": "musical instruments", "weight": 1.0, "year": 2019}, {"source": "7", "target": "43", "source_name": "nineteenth century", "target_name": "music education", "weight": 1.0, "year": 2019}, {"source": "7", "target": "45", "source_name": "nineteenth century", "target_name": "double bass", "weight": 2.0, "year": 2019}, {"source": "7", "target": "48", "source_name": "nineteenth century", "target_name": "pop music", "weight": 1.0, "year": 2019}, {"source": "7", "target": "49", "source_name": "nineteenth century", "target_name": "music theory", "weight": 1.0, "year": 2019}, {"source": "7", "target": "50", "source_name": "nineteenth century", "target_name": "hollywood film", "weight": 1.0, "year": 2019}, {"source": "7", "target": "52", "source_name": "nineteenth century", "target_name": "folk song", "weight": 3.0, "year": 2019}, {"source": "7", "target": "53", "source_name": "nineteenth century", "target_name": "popular music", "weight": 4.0, "year": 2019}, {"source": "7", "target": "54", "source_name": "nineteenth century", "target_name": "american popular music", "weight": 1.0, "year": 2019}, {"source": "7", "target": "65", "source_name": "nineteenth century", "target_name": "country music", "weight": 1.0, "year": 2019}, {"source": "7", "target": "67", "source_name": "nineteenth century", "target_name": "rock art", "weight": 1.0, "year": 2019}, {"source": "7", "target": "69", "source_name": "nineteenth century", "target_name": "classical music", "weight": 4.0, "year": 2019}, {"source": "7", "target": "70", "source_name": "nineteenth century", "target_name": "world war", "weight": 2.0, "year": 2019}, {"source": "7", "target": "74", "source_name": "nineteenth century", "target_name": "united states", "weight": 2.0, "year": 2019}, {"source": "7", "target": "77", "source_name": "nineteenth century", "target_name": "rock music", "weight": 4.0, "year": 2019}, {"source": "7", "target": "79", "source_name": "nineteenth century", "target_name": "popular culture", "weight": 1.0, "year": 2019}, {"source": "7", "target": "80", "source_name": "nineteenth century", "target_name": "folk music", "weight": 3.0, "year": 2019}, {"source": "7", "target": "85", "source_name": "nineteenth century", "target_name": "jewish music", "weight": 1.0, "year": 2019}, {"source": "7", "target": "87", "source_name": "nineteenth century", "target_name": "music hall", "weight": 1.0, "year": 2019}, {"source": "7", "target": "89", "source_name": "nineteenth century", "target_name": "electronic music", "weight": 1.0, "year": 2019}, {"source": "8", "target": "20", "source_name": "christian rock", "target_name": "garage rock", "weight": 1.0, "year": 2019}, {"source": "8", "target": "36", "source_name": "christian rock", "target_name": "music industry", "weight": 1.0, "year": 2019}, {"source": "8", "target": "44", "source_name": "christian rock", "target_name": "alternative rock", "weight": 1.0, "year": 2019}, {"source": "8", "target": "53", "source_name": "christian rock", "target_name": "popular music", "weight": 2.0, "year": 2019}, {"source": "8", "target": "57", "source_name": "christian rock", "target_name": "north america", "weight": 1.0, "year": 2019}, {"source": "8", "target": "65", "source_name": "christian rock", "target_name": "country music", "weight": 1.0, "year": 2019}, {"source": "8", "target": "73", "source_name": "christian rock", "target_name": "southern rock", "weight": 1.0, "year": 2019}, {"source": "8", "target": "77", "source_name": "christian rock", "target_name": "rock music", "weight": 2.0, "year": 2019}, {"source": "8", "target": "79", "source_name": "christian rock", "target_name": "popular culture", "weight": 2.0, "year": 2019}, {"source": "8", "target": "80", "source_name": "christian rock", "target_name": "folk music", "weight": 1.0, "year": 2019}, {"source": "9", "target": "10", "source_name": "compact disc", "target_name": "african american", "weight": 1.0, "year": 2019}, {"source": "9", "target": "11", "source_name": "compact disc", "target_name": "south africa", "weight": 1.0, "year": 2019}, {"source": "9", "target": "18", "source_name": "compact disc", "target_name": "middle class", "weight": 1.0, "year": 2019}, {"source": "9", "target": "19", "source_name": "compact disc", "target_name": "music video", "weight": 1.0, "year": 2019}, {"source": "9", "target": "24", "source_name": "compact disc", "target_name": "punk rock", "weight": 1.0, "year": 2019}, {"source": "9", "target": "25", "source_name": "compact disc", "target_name": "russian rock", "weight": 1.0, "year": 2019}, {"source": "9", "target": "28", "source_name": "compact disc", "target_name": "high school", "weight": 1.0, "year": 2019}, {"source": "9", "target": "29", "source_name": "compact disc", "target_name": "rolling stone", "weight": 1.0, "year": 2019}, {"source": "9", "target": "30", "source_name": "compact disc", "target_name": "rock band", "weight": 1.0, "year": 2019}, {"source": "9", "target": "36", "source_name": "compact disc", "target_name": "music industry", "weight": 1.0, "year": 2019}, {"source": "9", "target": "37", "source_name": "compact disc", "target_name": "middle ages", "weight": 1.0, "year": 2019}, {"source": "9", "target": "46", "source_name": "compact disc", "target_name": "music festival", "weight": 1.0, "year": 2019}, {"source": "9", "target": "48", "source_name": "compact disc", "target_name": "pop music", "weight": 1.0, "year": 2019}, {"source": "9", "target": "51", "source_name": "compact disc", "target_name": "cultural identity", "weight": 1.0, "year": 2019}, {"source": "9", "target": "53", "source_name": "compact disc", "target_name": "popular music", "weight": 4.0, "year": 2019}, {"source": "9", "target": "61", "source_name": "compact disc", "target_name": "progressive rock", "weight": 1.0, "year": 2019}, {"source": "9", "target": "66", "source_name": "compact disc", "target_name": "hong kong", "weight": 1.0, "year": 2019}, {"source": "9", "target": "74", "source_name": "compact disc", "target_name": "united states", "weight": 1.0, "year": 2019}, {"source": "9", "target": "77", "source_name": "compact disc", "target_name": "rock music", "weight": 2.0, "year": 2019}, {"source": "9", "target": "78", "source_name": "compact disc", "target_name": "hip hop", "weight": 1.0, "year": 2019}, {"source": "9", "target": "79", "source_name": "compact disc", "target_name": "popular culture", "weight": 1.0, "year": 2019}, {"source": "9", "target": "80", "source_name": "compact disc", "target_name": "folk music", "weight": 3.0, "year": 2019}, {"source": "9", "target": "85", "source_name": "compact disc", "target_name": "jewish music", "weight": 2.0, "year": 2019}, {"source": "9", "target": "89", "source_name": "compact disc", "target_name": "electronic music", "weight": 1.0, "year": 2019}, {"source": "10", "target": "11", "source_name": "african american", "target_name": "south africa", "weight": 1.0, "year": 2019}, {"source": "10", "target": "15", "source_name": "african american", "target_name": "musical theatre", "weight": 1.0, "year": 2019}, {"source": "10", "target": "17", "source_name": "african american", "target_name": "civil rights", "weight": 2.0, "year": 2019}, {"source": "10", "target": "19", "source_name": "african american", "target_name": "music video", "weight": 1.0, "year": 2019}, {"source": "10", "target": "21", "source_name": "african american", "target_name": "social protest", "weight": 1.0, "year": 2019}, {"source": "10", "target": "22", "source_name": "african american", "target_name": "chamber music", "weight": 1.0, "year": 2019}, {"source": "10", "target": "23", "source_name": "african american", "target_name": "electronic dance music", "weight": 1.0, "year": 2019}, {"source": "10", "target": "24", "source_name": "african american", "target_name": "punk rock", "weight": 2.0, "year": 2019}, {"source": "10", "target": "29", "source_name": "african american", "target_name": "rolling stone", "weight": 1.0, "year": 2019}, {"source": "10", "target": "36", "source_name": "african american", "target_name": "music industry", "weight": 3.0, "year": 2019}, {"source": "10", "target": "38", "source_name": "african american", "target_name": "summary additional listening", "weight": 1.0, "year": 2019}, {"source": "10", "target": "40", "source_name": "african american", "target_name": "musical instruments", "weight": 1.0, "year": 2019}, {"source": "10", "target": "52", "source_name": "african american", "target_name": "folk song", "weight": 1.0, "year": 2019}, {"source": "10", "target": "53", "source_name": "african american", "target_name": "popular music", "weight": 7.0, "year": 2019}, {"source": "10", "target": "54", "source_name": "african american", "target_name": "american popular music", "weight": 1.0, "year": 2019}, {"source": "10", "target": "61", "source_name": "african american", "target_name": "progressive rock", "weight": 1.0, "year": 2019}, {"source": "10", "target": "62", "source_name": "african american", "target_name": "led zeppelin", "weight": 1.0, "year": 2019}, {"source": "10", "target": "65", "source_name": "african american", "target_name": "country music", "weight": 1.0, "year": 2019}, {"source": "10", "target": "69", "source_name": "african american", "target_name": "classical music", "weight": 2.0, "year": 2019}, {"source": "10", "target": "72", "source_name": "african american", "target_name": "jimi hendrix", "weight": 1.0, "year": 2019}, {"source": "10", "target": "74", "source_name": "african american", "target_name": "united states", "weight": 6.0, "year": 2019}, {"source": "10", "target": "75", "source_name": "african american", "target_name": "world war ii", "weight": 1.0, "year": 2019}, {"source": "10", "target": "77", "source_name": "african american", "target_name": "rock music", "weight": 2.0, "year": 2019}, {"source": "10", "target": "78", "source_name": "african american", "target_name": "hip hop", "weight": 1.0, "year": 2019}, {"source": "10", "target": "79", "source_name": "african american", "target_name": "popular culture", "weight": 2.0, "year": 2019}, {"source": "10", "target": "80", "source_name": "african american", "target_name": "folk music", "weight": 4.0, "year": 2019}, {"source": "10", "target": "82", "source_name": "african american", "target_name": "heavy metal", "weight": 1.0, "year": 2019}, {"source": "10", "target": "89", "source_name": "african american", "target_name": "electronic music", "weight": 1.0, "year": 2019}, {"source": "11", "target": "17", "source_name": "south africa", "target_name": "civil rights", "weight": 1.0, "year": 2019}, {"source": "11", "target": "21", "source_name": "south africa", "target_name": "social protest", "weight": 2.0, "year": 2019}, {"source": "11", "target": "23", "source_name": "south africa", "target_name": "electronic dance music", "weight": 1.0, "year": 2019}, {"source": "11", "target": "25", "source_name": "south africa", "target_name": "russian rock", "weight": 1.0, "year": 2019}, {"source": "11", "target": "36", "source_name": "south africa", "target_name": "music industry", "weight": 1.0, "year": 2019}, {"source": "11", "target": "43", "source_name": "south africa", "target_name": "music education", "weight": 1.0, "year": 2019}, {"source": "11", "target": "46", "source_name": "south africa", "target_name": "music festival", "weight": 3.0, "year": 2019}, {"source": "11", "target": "53", "source_name": "south africa", "target_name": "popular music", "weight": 5.0, "year": 2019}, {"source": "11", "target": "61", "source_name": "south africa", "target_name": "progressive rock", "weight": 1.0, "year": 2019}, {"source": "11", "target": "66", "source_name": "south africa", "target_name": "hong kong", "weight": 1.0, "year": 2019}, {"source": "11", "target": "74", "source_name": "south africa", "target_name": "united states", "weight": 3.0, "year": 2019}, {"source": "11", "target": "78", "source_name": "south africa", "target_name": "hip hop", "weight": 1.0, "year": 2019}, {"source": "11", "target": "80", "source_name": "south africa", "target_name": "folk music", "weight": 3.0, "year": 2019}, {"source": "11", "target": "85", "source_name": "south africa", "target_name": "jewish music", "weight": 1.0, "year": 2019}, {"source": "11", "target": "87", "source_name": "south africa", "target_name": "music hall", "weight": 1.0, "year": 2019}, {"source": "11", "target": "88", "source_name": "south africa", "target_name": "oxford university press", "weight": 1.0, "year": 2019}, {"source": "12", "target": "15", "source_name": "rock opera", "target_name": "musical theatre", "weight": 4.0, "year": 2019}, {"source": "12", "target": "25", "source_name": "rock opera", "target_name": "russian rock", "weight": 1.0, "year": 2019}, {"source": "12", "target": "33", "source_name": "rock opera", "target_name": "jesus christ", "weight": 2.0, "year": 2019}, {"source": "12", "target": "41", "source_name": "rock opera", "target_name": "youth culture", "weight": 2.0, "year": 2019}, {"source": "12", "target": "48", "source_name": "rock opera", "target_name": "pop music", "weight": 1.0, "year": 2019}, {"source": "12", "target": "53", "source_name": "rock opera", "target_name": "popular music", "weight": 1.0, "year": 2019}, {"source": "12", "target": "57", "source_name": "rock opera", "target_name": "north america", "weight": 1.0, "year": 2019}, {"source": "12", "target": "77", "source_name": "rock opera", "target_name": "rock music", "weight": 5.0, "year": 2019}, {"source": "12", "target": "79", "source_name": "rock opera", "target_name": "popular culture", "weight": 2.0, "year": 2019}, {"source": "12", "target": "80", "source_name": "rock opera", "target_name": "folk music", "weight": 1.0, "year": 2019}, {"source": "15", "target": "33", "source_name": "musical theatre", "target_name": "jesus christ", "weight": 3.0, "year": 2019}, {"source": "15", "target": "53", "source_name": "musical theatre", "target_name": "popular music", "weight": 6.0, "year": 2019}, {"source": "15", "target": "54", "source_name": "musical theatre", "target_name": "american popular music", "weight": 3.0, "year": 2019}, {"source": "15", "target": "57", "source_name": "musical theatre", "target_name": "north america", "weight": 2.0, "year": 2019}, {"source": "15", "target": "70", "source_name": "musical theatre", "target_name": "world war", "weight": 1.0, "year": 2019}, {"source": "15", "target": "74", "source_name": "musical theatre", "target_name": "united states", "weight": 1.0, "year": 2019}, {"source": "15", "target": "77", "source_name": "musical theatre", "target_name": "rock music", "weight": 9.0, "year": 2019}, {"source": "15", "target": "79", "source_name": "musical theatre", "target_name": "popular culture", "weight": 1.0, "year": 2019}, {"source": "15", "target": "87", "source_name": "musical theatre", "target_name": "music hall", "weight": 1.0, "year": 2019}, {"source": "16", "target": "29", "source_name": "bob dylan", "target_name": "rolling stone", "weight": 4.0, "year": 2019}, {"source": "16", "target": "30", "source_name": "bob dylan", "target_name": "rock band", "weight": 2.0, "year": 2019}, {"source": "16", "target": "36", "source_name": "bob dylan", "target_name": "music industry", "weight": 3.0, "year": 2019}, {"source": "16", "target": "42", "source_name": "bob dylan", "target_name": "simon frith", "weight": 1.0, "year": 2019}, {"source": "16", "target": "44", "source_name": "bob dylan", "target_name": "alternative rock", "weight": 1.0, "year": 2019}, {"source": "16", "target": "48", "source_name": "bob dylan", "target_name": "pop music", "weight": 3.0, "year": 2019}, {"source": "16", "target": "52", "source_name": "bob dylan", "target_name": "folk song", "weight": 1.0, "year": 2019}, {"source": "16", "target": "53", "source_name": "bob dylan", "target_name": "popular music", "weight": 10.0, "year": 2019}, {"source": "16", "target": "54", "source_name": "bob dylan", "target_name": "american popular music", "weight": 1.0, "year": 2019}, {"source": "16", "target": "56", "source_name": "bob dylan", "target_name": "bruce springsteen", "weight": 1.0, "year": 2019}, {"source": "16", "target": "69", "source_name": "bob dylan", "target_name": "classical music", "weight": 1.0, "year": 2019}, {"source": "16", "target": "70", "source_name": "bob dylan", "target_name": "world war", "weight": 1.0, "year": 2019}, {"source": "16", "target": "72", "source_name": "bob dylan", "target_name": "jimi hendrix", "weight": 2.0, "year": 2019}, {"source": "16", "target": "75", "source_name": "bob dylan", "target_name": "world war ii", "weight": 1.0, "year": 2019}, {"source": "16", "target": "77", "source_name": "bob dylan", "target_name": "rock music", "weight": 7.0, "year": 2019}, {"source": "16", "target": "79", "source_name": "bob dylan", "target_name": "popular culture", "weight": 3.0, "year": 2019}, {"source": "16", "target": "80", "source_name": "bob dylan", "target_name": "folk music", "weight": 5.0, "year": 2019}, {"source": "17", "target": "21", "source_name": "civil rights", "target_name": "social protest", "weight": 1.0, "year": 2019}, {"source": "17", "target": "24", "source_name": "civil rights", "target_name": "punk rock", "weight": 1.0, "year": 2019}, {"source": "17", "target": "30", "source_name": "civil rights", "target_name": "rock band", "weight": 1.0, "year": 2019}, {"source": "17", "target": "41", "source_name": "civil rights", "target_name": "youth culture", "weight": 1.0, "year": 2019}, {"source": "17", "target": "53", "source_name": "civil rights", "target_name": "popular music", "weight": 4.0, "year": 2019}, {"source": "17", "target": "54", "source_name": "civil rights", "target_name": "american popular music", "weight": 1.0, "year": 2019}, {"source": "17", "target": "61", "source_name": "civil rights", "target_name": "progressive rock", "weight": 1.0, "year": 2019}, {"source": "17", "target": "70", "source_name": "civil rights", "target_name": "world war", "weight": 1.0, "year": 2019}, {"source": "17", "target": "73", "source_name": "civil rights", "target_name": "southern rock", "weight": 1.0, "year": 2019}, {"source": "17", "target": "74", "source_name": "civil rights", "target_name": "united states", "weight": 3.0, "year": 2019}, {"source": "17", "target": "75", "source_name": "civil rights", "target_name": "world war ii", "weight": 1.0, "year": 2019}, {"source": "17", "target": "77", "source_name": "civil rights", "target_name": "rock music", "weight": 3.0, "year": 2019}, {"source": "17", "target": "79", "source_name": "civil rights", "target_name": "popular culture", "weight": 1.0, "year": 2019}, {"source": "17", "target": "80", "source_name": "civil rights", "target_name": "folk music", "weight": 2.0, "year": 2019}, {"source": "18", "target": "19", "source_name": "middle class", "target_name": "music video", "weight": 1.0, "year": 2019}, {"source": "18", "target": "28", "source_name": "middle class", "target_name": "high school", "weight": 1.0, "year": 2019}, {"source": "18", "target": "30", "source_name": "middle class", "target_name": "rock band", "weight": 2.0, "year": 2019}, {"source": "18", "target": "48", "source_name": "middle class", "target_name": "pop music", "weight": 1.0, "year": 2019}, {"source": "18", "target": "53", "source_name": "middle class", "target_name": "popular music", "weight": 2.0, "year": 2019}, {"source": "18", "target": "61", "source_name": "middle class", "target_name": "progressive rock", "weight": 2.0, "year": 2019}, {"source": "18", "target": "77", "source_name": "middle class", "target_name": "rock music", "weight": 2.0, "year": 2019}, {"source": "19", "target": "22", "source_name": "music video", "target_name": "chamber music", "weight": 1.0, "year": 2019}, {"source": "19", "target": "24", "source_name": "music video", "target_name": "punk rock", "weight": 1.0, "year": 2019}, {"source": "19", "target": "28", "source_name": "music video", "target_name": "high school", "weight": 2.0, "year": 2019}, {"source": "19", "target": "30", "source_name": "music video", "target_name": "rock band", "weight": 4.0, "year": 2019}, {"source": "19", "target": "36", "source_name": "music video", "target_name": "music industry", "weight": 2.0, "year": 2019}, {"source": "19", "target": "38", "source_name": "music video", "target_name": "summary additional listening", "weight": 1.0, "year": 2019}, {"source": "19", "target": "40", "source_name": "music video", "target_name": "musical instruments", "weight": 1.0, "year": 2019}, {"source": "19", "target": "47", "source_name": "music video", "target_name": "hard rock", "weight": 1.0, "year": 2019}, {"source": "19", "target": "48", "source_name": "music video", "target_name": "pop music", "weight": 5.0, "year": 2019}, {"source": "19", "target": "49", "source_name": "music video", "target_name": "music theory", "weight": 1.0, "year": 2019}, {"source": "19", "target": "51", "source_name": "music video", "target_name": "cultural identity", "weight": 2.0, "year": 2019}, {"source": "19", "target": "52", "source_name": "music video", "target_name": "folk song", "weight": 1.0, "year": 2019}, {"source": "19", "target": "53", "source_name": "music video", "target_name": "popular music", "weight": 10.0, "year": 2019}, {"source": "19", "target": "54", "source_name": "music video", "target_name": "american popular music", "weight": 1.0, "year": 2019}, {"source": "19", "target": "56", "source_name": "music video", "target_name": "bruce springsteen", "weight": 1.0, "year": 2019}, {"source": "19", "target": "61", "source_name": "music video", "target_name": "progressive rock", "weight": 1.0, "year": 2019}, {"source": "19", "target": "65", "source_name": "music video", "target_name": "country music", "weight": 4.0, "year": 2019}, {"source": "19", "target": "67", "source_name": "music video", "target_name": "rock art", "weight": 1.0, "year": 2019}, {"source": "19", "target": "69", "source_name": "music video", "target_name": "classical music", "weight": 2.0, "year": 2019}, {"source": "19", "target": "72", "source_name": "music video", "target_name": "jimi hendrix", "weight": 1.0, "year": 2019}, {"source": "19", "target": "74", "source_name": "music video", "target_name": "united states", "weight": 3.0, "year": 2019}, {"source": "19", "target": "76", "source_name": "music video", "target_name": "los angeles", "weight": 1.0, "year": 2019}, {"source": "19", "target": "77", "source_name": "music video", "target_name": "rock music", "weight": 11.0, "year": 2019}, {"source": "19", "target": "78", "source_name": "music video", "target_name": "hip hop", "weight": 2.0, "year": 2019}, {"source": "19", "target": "79", "source_name": "music video", "target_name": "popular culture", "weight": 1.0, "year": 2019}, {"source": "19", "target": "80", "source_name": "music video", "target_name": "folk music", "weight": 1.0, "year": 2019}, {"source": "19", "target": "82", "source_name": "music video", "target_name": "heavy metal", "weight": 1.0, "year": 2019}, {"source": "19", "target": "89", "source_name": "music video", "target_name": "electronic music", "weight": 1.0, "year": 2019}, {"source": "19", "target": "90", "source_name": "music video", "target_name": "blues rock", "weight": 1.0, "year": 2019}, {"source": "20", "target": "24", "source_name": "garage rock", "target_name": "punk rock", "weight": 1.0, "year": 2019}, {"source": "20", "target": "27", "source_name": "garage rock", "target_name": "pop rock", "weight": 1.0, "year": 2019}, {"source": "20", "target": "29", "source_name": "garage rock", "target_name": "rolling stone", "weight": 1.0, "year": 2019}, {"source": "20", "target": "30", "source_name": "garage rock", "target_name": "rock band", "weight": 2.0, "year": 2019}, {"source": "20", "target": "43", "source_name": "garage rock", "target_name": "music education", "weight": 1.0, "year": 2019}, {"source": "20", "target": "44", "source_name": "garage rock", "target_name": "alternative rock", "weight": 2.0, "year": 2019}, {"source": "20", "target": "47", "source_name": "garage rock", "target_name": "hard rock", "weight": 1.0, "year": 2019}, {"source": "20", "target": "48", "source_name": "garage rock", "target_name": "pop music", "weight": 1.0, "year": 2019}, {"source": "20", "target": "53", "source_name": "garage rock", "target_name": "popular music", "weight": 4.0, "year": 2019}, {"source": "20", "target": "57", "source_name": "garage rock", "target_name": "north america", "weight": 1.0, "year": 2019}, {"source": "20", "target": "65", "source_name": "garage rock", "target_name": "country music", "weight": 1.0, "year": 2019}, {"source": "20", "target": "73", "source_name": "garage rock", "target_name": "southern rock", "weight": 1.0, "year": 2019}, {"source": "20", "target": "77", "source_name": "garage rock", "target_name": "rock music", "weight": 5.0, "year": 2019}, {"source": "20", "target": "80", "source_name": "garage rock", "target_name": "folk music", "weight": 1.0, "year": 2019}, {"source": "21", "target": "47", "source_name": "social protest", "target_name": "hard rock", "weight": 1.0, "year": 2019}, {"source": "21", "target": "48", "source_name": "social protest", "target_name": "pop music", "weight": 1.0, "year": 2019}, {"source": "21", "target": "53", "source_name": "social protest", "target_name": "popular music", "weight": 5.0, "year": 2019}, {"source": "21", "target": "57", "source_name": "social protest", "target_name": "north america", "weight": 2.0, "year": 2019}, {"source": "21", "target": "61", "source_name": "social protest", "target_name": "progressive rock", "weight": 1.0, "year": 2019}, {"source": "21", "target": "71", "source_name": "social protest", "target_name": "latin american", "weight": 1.0, "year": 2019}, {"source": "21", "target": "74", "source_name": "social protest", "target_name": "united states", "weight": 2.0, "year": 2019}, {"source": "21", "target": "77", "source_name": "social protest", "target_name": "rock music", "weight": 1.0, "year": 2019}, {"source": "21", "target": "80", "source_name": "social protest", "target_name": "folk music", "weight": 2.0, "year": 2019}, {"source": "21", "target": "82", "source_name": "social protest", "target_name": "heavy metal", "weight": 1.0, "year": 2019}, {"source": "21", "target": "87", "source_name": "social protest", "target_name": "music hall", "weight": 1.0, "year": 2019}, {"source": "22", "target": "35", "source_name": "chamber music", "target_name": "ancient greek", "weight": 1.0, "year": 2019}, {"source": "22", "target": "36", "source_name": "chamber music", "target_name": "music industry", "weight": 1.0, "year": 2019}, {"source": "22", "target": "38", "source_name": "chamber music", "target_name": "summary additional listening", "weight": 1.0, "year": 2019}, {"source": "22", "target": "40", "source_name": "chamber music", "target_name": "musical instruments", "weight": 1.0, "year": 2019}, {"source": "22", "target": "48", "source_name": "chamber music", "target_name": "pop music", "weight": 1.0, "year": 2019}, {"source": "22", "target": "52", "source_name": "chamber music", "target_name": "folk song", "weight": 1.0, "year": 2019}, {"source": "22", "target": "53", "source_name": "chamber music", "target_name": "popular music", "weight": 2.0, "year": 2019}, {"source": "22", "target": "54", "source_name": "chamber music", "target_name": "american popular music", "weight": 1.0, "year": 2019}, {"source": "22", "target": "65", "source_name": "chamber music", "target_name": "country music", "weight": 2.0, "year": 2019}, {"source": "22", "target": "69", "source_name": "chamber music", "target_name": "classical music", "weight": 4.0, "year": 2019}, {"source": "22", "target": "74", "source_name": "chamber music", "target_name": "united states", "weight": 1.0, "year": 2019}, {"source": "22", "target": "77", "source_name": "chamber music", "target_name": "rock music", "weight": 2.0, "year": 2019}, {"source": "22", "target": "79", "source_name": "chamber music", "target_name": "popular culture", "weight": 1.0, "year": 2019}, {"source": "22", "target": "80", "source_name": "chamber music", "target_name": "folk music", "weight": 2.0, "year": 2019}, {"source": "22", "target": "89", "source_name": "chamber music", "target_name": "electronic music", "weight": 3.0, "year": 2019}, {"source": "23", "target": "24", "source_name": "electronic dance music", "target_name": "punk rock", "weight": 1.0, "year": 2019}, {"source": "23", "target": "36", "source_name": "electronic dance music", "target_name": "music industry", "weight": 2.0, "year": 2019}, {"source": "23", "target": "42", "source_name": "electronic dance music", "target_name": "simon frith", "weight": 2.0, "year": 2019}, {"source": "23", "target": "47", "source_name": "electronic dance music", "target_name": "hard rock", "weight": 1.0, "year": 2019}, {"source": "23", "target": "53", "source_name": "electronic dance music", "target_name": "popular music", "weight": 10.0, "year": 2019}, {"source": "23", "target": "56", "source_name": "electronic dance music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2019}, {"source": "23", "target": "57", "source_name": "electronic dance music", "target_name": "north america", "weight": 1.0, "year": 2019}, {"source": "23", "target": "60", "source_name": "electronic dance music", "target_name": "cultural studies", "weight": 2.0, "year": 2019}, {"source": "23", "target": "67", "source_name": "electronic dance music", "target_name": "rock art", "weight": 1.0, "year": 2019}, {"source": "23", "target": "74", "source_name": "electronic dance music", "target_name": "united states", "weight": 2.0, "year": 2019}, {"source": "23", "target": "76", "source_name": "electronic dance music", "target_name": "los angeles", "weight": 1.0, "year": 2019}, {"source": "23", "target": "77", "source_name": "electronic dance music", "target_name": "rock music", "weight": 1.0, "year": 2019}, {"source": "23", "target": "78", "source_name": "electronic dance music", "target_name": "hip hop", "weight": 1.0, "year": 2019}, {"source": "23", "target": "79", "source_name": "electronic dance music", "target_name": "popular culture", "weight": 1.0, "year": 2019}, {"source": "23", "target": "82", "source_name": "electronic dance music", "target_name": "heavy metal", "weight": 3.0, "year": 2019}, {"source": "23", "target": "88", "source_name": "electronic dance music", "target_name": "oxford university press", "weight": 1.0, "year": 2019}, {"source": "23", "target": "89", "source_name": "electronic dance music", "target_name": "electronic music", "weight": 4.0, "year": 2019}, {"source": "24", "target": "27", "source_name": "punk rock", "target_name": "pop rock", "weight": 1.0, "year": 2019}, {"source": "24", "target": "30", "source_name": "punk rock", "target_name": "rock band", "weight": 1.0, "year": 2019}, {"source": "24", "target": "36", "source_name": "punk rock", "target_name": "music industry", "weight": 1.0, "year": 2019}, {"source": "24", "target": "41", "source_name": "punk rock", "target_name": "youth culture", "weight": 2.0, "year": 2019}, {"source": "24", "target": "42", "source_name": "punk rock", "target_name": "simon frith", "weight": 1.0, "year": 2019}, {"source": "24", "target": "44", "source_name": "punk rock", "target_name": "alternative rock", "weight": 4.0, "year": 2019}, {"source": "24", "target": "47", "source_name": "punk rock", "target_name": "hard rock", "weight": 5.0, "year": 2019}, {"source": "24", "target": "48", "source_name": "punk rock", "target_name": "pop music", "weight": 4.0, "year": 2019}, {"source": "24", "target": "51", "source_name": "punk rock", "target_name": "cultural identity", "weight": 1.0, "year": 2019}, {"source": "24", "target": "53", "source_name": "punk rock", "target_name": "popular music", "weight": 13.0, "year": 2019}, {"source": "24", "target": "57", "source_name": "punk rock", "target_name": "north america", "weight": 1.0, "year": 2019}, {"source": "24", "target": "61", "source_name": "punk rock", "target_name": "progressive rock", "weight": 3.0, "year": 2019}, {"source": "24", "target": "65", "source_name": "punk rock", "target_name": "country music", "weight": 1.0, "year": 2019}, {"source": "24", "target": "69", "source_name": "punk rock", "target_name": "classical music", "weight": 1.0, "year": 2019}, {"source": "24", "target": "74", "source_name": "punk rock", "target_name": "united states", "weight": 3.0, "year": 2019}, {"source": "24", "target": "77", "source_name": "punk rock", "target_name": "rock music", "weight": 12.0, "year": 2019}, {"source": "24", "target": "78", "source_name": "punk rock", "target_name": "hip hop", "weight": 1.0, "year": 2019}, {"source": "24", "target": "79", "source_name": "punk rock", "target_name": "popular culture", "weight": 1.0, "year": 2019}, {"source": "24", "target": "80", "source_name": "punk rock", "target_name": "folk music", "weight": 1.0, "year": 2019}, {"source": "24", "target": "82", "source_name": "punk rock", "target_name": "heavy metal", "weight": 6.0, "year": 2019}, {"source": "25", "target": "30", "source_name": "russian rock", "target_name": "rock band", "weight": 1.0, "year": 2019}, {"source": "25", "target": "37", "source_name": "russian rock", "target_name": "middle ages", "weight": 1.0, "year": 2019}, {"source": "25", "target": "46", "source_name": "russian rock", "target_name": "music festival", "weight": 1.0, "year": 2019}, {"source": "25", "target": "53", "source_name": "russian rock", "target_name": "popular music", "weight": 2.0, "year": 2019}, {"source": "25", "target": "66", "source_name": "russian rock", "target_name": "hong kong", "weight": 1.0, "year": 2019}, {"source": "25", "target": "77", "source_name": "russian rock", "target_name": "rock music", "weight": 6.0, "year": 2019}, {"source": "25", "target": "78", "source_name": "russian rock", "target_name": "hip hop", "weight": 1.0, "year": 2019}, {"source": "25", "target": "80", "source_name": "russian rock", "target_name": "folk music", "weight": 2.0, "year": 2019}, {"source": "25", "target": "82", "source_name": "russian rock", "target_name": "heavy metal", "weight": 1.0, "year": 2019}, {"source": "25", "target": "85", "source_name": "russian rock", "target_name": "jewish music", "weight": 1.0, "year": 2019}, {"source": "26", "target": "43", "source_name": "information technology", "target_name": "music education", "weight": 1.0, "year": 2019}, {"source": "27", "target": "44", "source_name": "pop rock", "target_name": "alternative rock", "weight": 1.0, "year": 2019}, {"source": "27", "target": "47", "source_name": "pop rock", "target_name": "hard rock", "weight": 1.0, "year": 2019}, {"source": "27", "target": "48", "source_name": "pop rock", "target_name": "pop music", "weight": 1.0, "year": 2019}, {"source": "27", "target": "53", "source_name": "pop rock", "target_name": "popular music", "weight": 1.0, "year": 2019}, {"source": "27", "target": "64", "source_name": "pop rock", "target_name": "english language", "weight": 1.0, "year": 2019}, {"source": "27", "target": "65", "source_name": "pop rock", "target_name": "country music", "weight": 1.0, "year": 2019}, {"source": "27", "target": "66", "source_name": "pop rock", "target_name": "hong kong", "weight": 1.0, "year": 2019}, {"source": "27", "target": "67", "source_name": "pop rock", "target_name": "rock art", "weight": 1.0, "year": 2019}, {"source": "27", "target": "77", "source_name": "pop rock", "target_name": "rock music", "weight": 1.0, "year": 2019}, {"source": "27", "target": "83", "source_name": "pop rock", "target_name": "folk rock", "weight": 1.0, "year": 2019}, {"source": "28", "target": "30", "source_name": "high school", "target_name": "rock band", "weight": 1.0, "year": 2019}, {"source": "28", "target": "37", "source_name": "high school", "target_name": "middle ages", "weight": 1.0, "year": 2019}, {"source": "28", "target": "48", "source_name": "high school", "target_name": "pop music", "weight": 3.0, "year": 2019}, {"source": "28", "target": "53", "source_name": "high school", "target_name": "popular music", "weight": 1.0, "year": 2019}, {"source": "28", "target": "58", "source_name": "high school", "target_name": "music therapy", "weight": 1.0, "year": 2019}, {"source": "28", "target": "61", "source_name": "high school", "target_name": "progressive rock", "weight": 1.0, "year": 2019}, {"source": "28", "target": "69", "source_name": "high school", "target_name": "classical music", "weight": 1.0, "year": 2019}, {"source": "28", "target": "74", "source_name": "high school", "target_name": "united states", "weight": 1.0, "year": 2019}, {"source": "28", "target": "77", "source_name": "high school", "target_name": "rock music", "weight": 6.0, "year": 2019}, {"source": "28", "target": "82", "source_name": "high school", "target_name": "heavy metal", "weight": 1.0, "year": 2019}, {"source": "29", "target": "30", "source_name": "rolling stone", "target_name": "rock band", "weight": 1.0, "year": 2019}, {"source": "29", "target": "36", "source_name": "rolling stone", "target_name": "music industry", "weight": 2.0, "year": 2019}, {"source": "29", "target": "42", "source_name": "rolling stone", "target_name": "simon frith", "weight": 1.0, "year": 2019}, {"source": "29", "target": "44", "source_name": "rolling stone", "target_name": "alternative rock", "weight": 1.0, "year": 2019}, {"source": "29", "target": "48", "source_name": "rolling stone", "target_name": "pop music", "weight": 4.0, "year": 2019}, {"source": "29", "target": "53", "source_name": "rolling stone", "target_name": "popular music", "weight": 10.0, "year": 2019}, {"source": "29", "target": "54", "source_name": "rolling stone", "target_name": "american popular music", "weight": 2.0, "year": 2019}, {"source": "29", "target": "55", "source_name": "rolling stone", "target_name": "rock criticism", "weight": 4.0, "year": 2019}, {"source": "29", "target": "56", "source_name": "rolling stone", "target_name": "bruce springsteen", "weight": 2.0, "year": 2019}, {"source": "29", "target": "62", "source_name": "rolling stone", "target_name": "led zeppelin", "weight": 2.0, "year": 2019}, {"source": "29", "target": "69", "source_name": "rolling stone", "target_name": "classical music", "weight": 1.0, "year": 2019}, {"source": "29", "target": "72", "source_name": "rolling stone", "target_name": "jimi hendrix", "weight": 3.0, "year": 2019}, {"source": "29", "target": "74", "source_name": "rolling stone", "target_name": "united states", "weight": 2.0, "year": 2019}, {"source": "29", "target": "77", "source_name": "rolling stone", "target_name": "rock music", "weight": 9.0, "year": 2019}, {"source": "29", "target": "79", "source_name": "rolling stone", "target_name": "popular culture", "weight": 3.0, "year": 2019}, {"source": "29", "target": "80", "source_name": "rolling stone", "target_name": "folk music", "weight": 1.0, "year": 2019}, {"source": "29", "target": "87", "source_name": "rolling stone", "target_name": "music hall", "weight": 2.0, "year": 2019}, {"source": "30", "target": "36", "source_name": "rock band", "target_name": "music industry", "weight": 5.0, "year": 2019}, {"source": "30", "target": "37", "source_name": "rock band", "target_name": "middle ages", "weight": 2.0, "year": 2019}, {"source": "30", "target": "40", "source_name": "rock band", "target_name": "musical instruments", "weight": 1.0, "year": 2019}, {"source": "30", "target": "41", "source_name": "rock band", "target_name": "youth culture", "weight": 1.0, "year": 2019}, {"source": "30", "target": "43", "source_name": "rock band", "target_name": "music education", "weight": 6.0, "year": 2019}, {"source": "30", "target": "44", "source_name": "rock band", "target_name": "alternative rock", "weight": 1.0, "year": 2019}, {"source": "30", "target": "47", "source_name": "rock band", "target_name": "hard rock", "weight": 1.0, "year": 2019}, {"source": "30", "target": "48", "source_name": "rock band", "target_name": "pop music", "weight": 2.0, "year": 2019}, {"source": "30", "target": "52", "source_name": "rock band", "target_name": "folk song", "weight": 2.0, "year": 2019}, {"source": "30", "target": "53", "source_name": "rock band", "target_name": "popular music", "weight": 24.0, "year": 2019}, {"source": "30", "target": "54", "source_name": "rock band", "target_name": "american popular music", "weight": 1.0, "year": 2019}, {"source": "30", "target": "55", "source_name": "rock band", "target_name": "rock criticism", "weight": 1.0, "year": 2019}, {"source": "30", "target": "61", "source_name": "rock band", "target_name": "progressive rock", "weight": 11.0, "year": 2019}, {"source": "30", "target": "62", "source_name": "rock band", "target_name": "led zeppelin", "weight": 1.0, "year": 2019}, {"source": "30", "target": "63", "source_name": "rock band", "target_name": "post rock", "weight": 1.0, "year": 2019}, {"source": "30", "target": "65", "source_name": "rock band", "target_name": "country music", "weight": 1.0, "year": 2019}, {"source": "30", "target": "67", "source_name": "rock band", "target_name": "rock art", "weight": 1.0, "year": 2019}, {"source": "30", "target": "69", "source_name": "rock band", "target_name": "classical music", "weight": 5.0, "year": 2019}, {"source": "30", "target": "72", "source_name": "rock band", "target_name": "jimi hendrix", "weight": 2.0, "year": 2019}, {"source": "30", "target": "73", "source_name": "rock band", "target_name": "southern rock", "weight": 2.0, "year": 2019}, {"source": "30", "target": "74", "source_name": "rock band", "target_name": "united states", "weight": 2.0, "year": 2019}, {"source": "30", "target": "76", "source_name": "rock band", "target_name": "los angeles", "weight": 1.0, "year": 2019}, {"source": "30", "target": "77", "source_name": "rock band", "target_name": "rock music", "weight": 39.0, "year": 2019}, {"source": "30", "target": "79", "source_name": "rock band", "target_name": "popular culture", "weight": 2.0, "year": 2019}, {"source": "30", "target": "80", "source_name": "rock band", "target_name": "folk music", "weight": 3.0, "year": 2019}, {"source": "30", "target": "82", "source_name": "rock band", "target_name": "heavy metal", "weight": 4.0, "year": 2019}, {"source": "30", "target": "83", "source_name": "rock band", "target_name": "folk rock", "weight": 1.0, "year": 2019}, {"source": "30", "target": "87", "source_name": "rock band", "target_name": "music hall", "weight": 1.0, "year": 2019}, {"source": "30", "target": "89", "source_name": "rock band", "target_name": "electronic music", "weight": 1.0, "year": 2019}, {"source": "31", "target": "69", "source_name": "post modernism", "target_name": "classical music", "weight": 1.0, "year": 2019}, {"source": "32", "target": "43", "source_name": "higher education", "target_name": "music education", "weight": 5.0, "year": 2019}, {"source": "32", "target": "53", "source_name": "higher education", "target_name": "popular music", "weight": 1.0, "year": 2019}, {"source": "32", "target": "60", "source_name": "higher education", "target_name": "cultural studies", "weight": 1.0, "year": 2019}, {"source": "32", "target": "69", "source_name": "higher education", "target_name": "classical music", "weight": 1.0, "year": 2019}, {"source": "33", "target": "53", "source_name": "jesus christ", "target_name": "popular music", "weight": 1.0, "year": 2019}, {"source": "33", "target": "70", "source_name": "jesus christ", "target_name": "world war", "weight": 1.0, "year": 2019}, {"source": "33", "target": "77", "source_name": "jesus christ", "target_name": "rock music", "weight": 4.0, "year": 2019}, {"source": "34", "target": "36", "source_name": "mass media", "target_name": "music industry", "weight": 1.0, "year": 2019}, {"source": "34", "target": "40", "source_name": "mass media", "target_name": "musical instruments", "weight": 1.0, "year": 2019}, {"source": "34", "target": "41", "source_name": "mass media", "target_name": "youth culture", "weight": 1.0, "year": 2019}, {"source": "34", "target": "43", "source_name": "mass media", "target_name": "music education", "weight": 2.0, "year": 2019}, {"source": "34", "target": "46", "source_name": "mass media", "target_name": "music festival", "weight": 1.0, "year": 2019}, {"source": "34", "target": "48", "source_name": "mass media", "target_name": "pop music", "weight": 2.0, "year": 2019}, {"source": "34", "target": "51", "source_name": "mass media", "target_name": "cultural identity", "weight": 1.0, "year": 2019}, {"source": "34", "target": "52", "source_name": "mass media", "target_name": "folk song", "weight": 2.0, "year": 2019}, {"source": "34", "target": "53", "source_name": "mass media", "target_name": "popular music", "weight": 6.0, "year": 2019}, {"source": "34", "target": "60", "source_name": "mass media", "target_name": "cultural studies", "weight": 1.0, "year": 2019}, {"source": "34", "target": "65", "source_name": "mass media", "target_name": "country music", "weight": 1.0, "year": 2019}, {"source": "34", "target": "66", "source_name": "mass media", "target_name": "hong kong", "weight": 1.0, "year": 2019}, {"source": "34", "target": "67", "source_name": "mass media", "target_name": "rock art", "weight": 1.0, "year": 2019}, {"source": "34", "target": "69", "source_name": "mass media", "target_name": "classical music", "weight": 1.0, "year": 2019}, {"source": "34", "target": "77", "source_name": "mass media", "target_name": "rock music", "weight": 4.0, "year": 2019}, {"source": "34", "target": "79", "source_name": "mass media", "target_name": "popular culture", "weight": 2.0, "year": 2019}, {"source": "35", "target": "43", "source_name": "ancient greek", "target_name": "music education", "weight": 1.0, "year": 2019}, {"source": "35", "target": "65", "source_name": "ancient greek", "target_name": "country music", "weight": 1.0, "year": 2019}, {"source": "35", "target": "77", "source_name": "ancient greek", "target_name": "rock music", "weight": 1.0, "year": 2019}, {"source": "35", "target": "80", "source_name": "ancient greek", "target_name": "folk music", "weight": 1.0, "year": 2019}, {"source": "35", "target": "89", "source_name": "ancient greek", "target_name": "electronic music", "weight": 1.0, "year": 2019}, {"source": "36", "target": "38", "source_name": "music industry", "target_name": "summary additional listening", "weight": 1.0, "year": 2019}, {"source": "36", "target": "40", "source_name": "music industry", "target_name": "musical instruments", "weight": 1.0, "year": 2019}, {"source": "36", "target": "41", "source_name": "music industry", "target_name": "youth culture", "weight": 3.0, "year": 2019}, {"source": "36", "target": "42", "source_name": "music industry", "target_name": "simon frith", "weight": 2.0, "year": 2019}, {"source": "36", "target": "43", "source_name": "music industry", "target_name": "music education", "weight": 4.0, "year": 2019}, {"source": "36", "target": "44", "source_name": "music industry", "target_name": "alternative rock", "weight": 1.0, "year": 2019}, {"source": "36", "target": "46", "source_name": "music industry", "target_name": "music festival", "weight": 1.0, "year": 2019}, {"source": "36", "target": "47", "source_name": "music industry", "target_name": "hard rock", "weight": 3.0, "year": 2019}, {"source": "36", "target": "48", "source_name": "music industry", "target_name": "pop music", "weight": 10.0, "year": 2019}, {"source": "36", "target": "49", "source_name": "music industry", "target_name": "music theory", "weight": 1.0, "year": 2019}, {"source": "36", "target": "50", "source_name": "music industry", "target_name": "hollywood film", "weight": 1.0, "year": 2019}, {"source": "36", "target": "51", "source_name": "music industry", "target_name": "cultural identity", "weight": 3.0, "year": 2019}, {"source": "36", "target": "52", "source_name": "music industry", "target_name": "folk song", "weight": 1.0, "year": 2019}, {"source": "36", "target": "53", "source_name": "music industry", "target_name": "popular music", "weight": 38.0, "year": 2019}, {"source": "36", "target": "54", "source_name": "music industry", "target_name": "american popular music", "weight": 3.0, "year": 2019}, {"source": "36", "target": "55", "source_name": "music industry", "target_name": "rock criticism", "weight": 3.0, "year": 2019}, {"source": "36", "target": "56", "source_name": "music industry", "target_name": "bruce springsteen", "weight": 2.0, "year": 2019}, {"source": "36", "target": "60", "source_name": "music industry", "target_name": "cultural studies", "weight": 2.0, "year": 2019}, {"source": "36", "target": "61", "source_name": "music industry", "target_name": "progressive rock", "weight": 3.0, "year": 2019}, {"source": "36", "target": "62", "source_name": "music industry", "target_name": "led zeppelin", "weight": 1.0, "year": 2019}, {"source": "36", "target": "64", "source_name": "music industry", "target_name": "english language", "weight": 1.0, "year": 2019}, {"source": "36", "target": "65", "source_name": "music industry", "target_name": "country music", "weight": 2.0, "year": 2019}, {"source": "36", "target": "66", "source_name": "music industry", "target_name": "hong kong", "weight": 1.0, "year": 2019}, {"source": "36", "target": "67", "source_name": "music industry", "target_name": "rock art", "weight": 1.0, "year": 2019}, {"source": "36", "target": "68", "source_name": "music industry", "target_name": "hearing loss", "weight": 1.0, "year": 2019}, {"source": "36", "target": "69", "source_name": "music industry", "target_name": "classical music", "weight": 7.0, "year": 2019}, {"source": "36", "target": "70", "source_name": "music industry", "target_name": "world war", "weight": 2.0, "year": 2019}, {"source": "36", "target": "72", "source_name": "music industry", "target_name": "jimi hendrix", "weight": 4.0, "year": 2019}, {"source": "36", "target": "74", "source_name": "music industry", "target_name": "united states", "weight": 6.0, "year": 2019}, {"source": "36", "target": "75", "source_name": "music industry", "target_name": "world war ii", "weight": 3.0, "year": 2019}, {"source": "36", "target": "76", "source_name": "music industry", "target_name": "los angeles", "weight": 2.0, "year": 2019}, {"source": "36", "target": "77", "source_name": "music industry", "target_name": "rock music", "weight": 26.0, "year": 2019}, {"source": "36", "target": "78", "source_name": "music industry", "target_name": "hip hop", "weight": 6.0, "year": 2019}, {"source": "36", "target": "79", "source_name": "music industry", "target_name": "popular culture", "weight": 6.0, "year": 2019}, {"source": "36", "target": "80", "source_name": "music industry", "target_name": "folk music", "weight": 6.0, "year": 2019}, {"source": "36", "target": "82", "source_name": "music industry", "target_name": "heavy metal", "weight": 2.0, "year": 2019}, {"source": "36", "target": "83", "source_name": "music industry", "target_name": "folk rock", "weight": 1.0, "year": 2019}, {"source": "36", "target": "87", "source_name": "music industry", "target_name": "music hall", "weight": 1.0, "year": 2019}, {"source": "36", "target": "88", "source_name": "music industry", "target_name": "oxford university press", "weight": 2.0, "year": 2019}, {"source": "36", "target": "89", "source_name": "music industry", "target_name": "electronic music", "weight": 4.0, "year": 2019}, {"source": "37", "target": "44", "source_name": "middle ages", "target_name": "alternative rock", "weight": 1.0, "year": 2019}, {"source": "37", "target": "58", "source_name": "middle ages", "target_name": "music therapy", "weight": 1.0, "year": 2019}, {"source": "37", "target": "61", "source_name": "middle ages", "target_name": "progressive rock", "weight": 1.0, "year": 2019}, {"source": "37", "target": "69", "source_name": "middle ages", "target_name": "classical music", "weight": 1.0, "year": 2019}, {"source": "37", "target": "77", "source_name": "middle ages", "target_name": "rock music", "weight": 3.0, "year": 2019}, {"source": "37", "target": "80", "source_name": "middle ages", "target_name": "folk music", "weight": 2.0, "year": 2019}, {"source": "38", "target": "40", "source_name": "summary additional listening", "target_name": "musical instruments", "weight": 1.0, "year": 2019}, {"source": "38", "target": "52", "source_name": "summary additional listening", "target_name": "folk song", "weight": 1.0, "year": 2019}, {"source": "38", "target": "53", "source_name": "summary additional listening", "target_name": "popular music", "weight": 1.0, "year": 2019}, {"source": "38", "target": "54", "source_name": "summary additional listening", "target_name": "american popular music", "weight": 1.0, "year": 2019}, {"source": "38", "target": "65", "source_name": "summary additional listening", "target_name": "country music", "weight": 1.0, "year": 2019}, {"source": "38", "target": "69", "source_name": "summary additional listening", "target_name": "classical music", "weight": 1.0, "year": 2019}, {"source": "38", "target": "74", "source_name": "summary additional listening", "target_name": "united states", "weight": 1.0, "year": 2019}, {"source": "38", "target": "80", "source_name": "summary additional listening", "target_name": "folk music", "weight": 1.0, "year": 2019}, {"source": "38", "target": "89", "source_name": "summary additional listening", "target_name": "electronic music", "weight": 1.0, "year": 2019}, {"source": "40", "target": "43", "source_name": "musical instruments", "target_name": "music education", "weight": 1.0, "year": 2019}, {"source": "40", "target": "48", "source_name": "musical instruments", "target_name": "pop music", "weight": 1.0, "year": 2019}, {"source": "40", "target": "49", "source_name": "musical instruments", "target_name": "music theory", "weight": 1.0, "year": 2019}, {"source": "40", "target": "52", "source_name": "musical instruments", "target_name": "folk song", "weight": 1.0, "year": 2019}, {"source": "40", "target": "53", "source_name": "musical instruments", "target_name": "popular music", "weight": 2.0, "year": 2019}, {"source": "40", "target": "54", "source_name": "musical instruments", "target_name": "american popular music", "weight": 2.0, "year": 2019}, {"source": "40", "target": "65", "source_name": "musical instruments", "target_name": "country music", "weight": 1.0, "year": 2019}, {"source": "40", "target": "69", "source_name": "musical instruments", "target_name": "classical music", "weight": 1.0, "year": 2019}, {"source": "40", "target": "70", "source_name": "musical instruments", "target_name": "world war", "weight": 1.0, "year": 2019}, {"source": "40", "target": "74", "source_name": "musical instruments", "target_name": "united states", "weight": 2.0, "year": 2019}, {"source": "40", "target": "75", "source_name": "musical instruments", "target_name": "world war ii", "weight": 1.0, "year": 2019}, {"source": "40", "target": "77", "source_name": "musical instruments", "target_name": "rock music", "weight": 1.0, "year": 2019}, {"source": "40", "target": "80", "source_name": "musical instruments", "target_name": "folk music", "weight": 1.0, "year": 2019}, {"source": "40", "target": "89", "source_name": "musical instruments", "target_name": "electronic music", "weight": 2.0, "year": 2019}, {"source": "41", "target": "42", "source_name": "youth culture", "target_name": "simon frith", "weight": 1.0, "year": 2019}, {"source": "41", "target": "47", "source_name": "youth culture", "target_name": "hard rock", "weight": 1.0, "year": 2019}, {"source": "41", "target": "48", "source_name": "youth culture", "target_name": "pop music", "weight": 5.0, "year": 2019}, {"source": "41", "target": "51", "source_name": "youth culture", "target_name": "cultural identity", "weight": 2.0, "year": 2019}, {"source": "41", "target": "53", "source_name": "youth culture", "target_name": "popular music", "weight": 9.0, "year": 2019}, {"source": "41", "target": "57", "source_name": "youth culture", "target_name": "north america", "weight": 1.0, "year": 2019}, {"source": "41", "target": "60", "source_name": "youth culture", "target_name": "cultural studies", "weight": 3.0, "year": 2019}, {"source": "41", "target": "61", "source_name": "youth culture", "target_name": "progressive rock", "weight": 1.0, "year": 2019}, {"source": "41", "target": "66", "source_name": "youth culture", "target_name": "hong kong", "weight": 1.0, "year": 2019}, {"source": "41", "target": "74", "source_name": "youth culture", "target_name": "united states", "weight": 2.0, "year": 2019}, {"source": "41", "target": "75", "source_name": "youth culture", "target_name": "world war ii", "weight": 1.0, "year": 2019}, {"source": "41", "target": "77", "source_name": "youth culture", "target_name": "rock music", "weight": 12.0, "year": 2019}, {"source": "41", "target": "80", "source_name": "youth culture", "target_name": "folk music", "weight": 2.0, "year": 2019}, {"source": "42", "target": "47", "source_name": "simon frith", "target_name": "hard rock", "weight": 1.0, "year": 2019}, {"source": "42", "target": "48", "source_name": "simon frith", "target_name": "pop music", "weight": 6.0, "year": 2019}, {"source": "42", "target": "49", "source_name": "simon frith", "target_name": "music theory", "weight": 1.0, "year": 2019}, {"source": "42", "target": "51", "source_name": "simon frith", "target_name": "cultural identity", "weight": 1.0, "year": 2019}, {"source": "42", "target": "53", "source_name": "simon frith", "target_name": "popular music", "weight": 7.0, "year": 2019}, {"source": "42", "target": "55", "source_name": "simon frith", "target_name": "rock criticism", "weight": 2.0, "year": 2019}, {"source": "42", "target": "56", "source_name": "simon frith", "target_name": "bruce springsteen", "weight": 1.0, "year": 2019}, {"source": "42", "target": "57", "source_name": "simon frith", "target_name": "north america", "weight": 1.0, "year": 2019}, {"source": "42", "target": "60", "source_name": "simon frith", "target_name": "cultural studies", "weight": 4.0, "year": 2019}, {"source": "42", "target": "61", "source_name": "simon frith", "target_name": "progressive rock", "weight": 1.0, "year": 2019}, {"source": "42", "target": "65", "source_name": "simon frith", "target_name": "country music", "weight": 1.0, "year": 2019}, {"source": "42", "target": "72", "source_name": "simon frith", "target_name": "jimi hendrix", "weight": 1.0, "year": 2019}, {"source": "42", "target": "76", "source_name": "simon frith", "target_name": "los angeles", "weight": 1.0, "year": 2019}, {"source": "42", "target": "77", "source_name": "simon frith", "target_name": "rock music", "weight": 6.0, "year": 2019}, {"source": "42", "target": "78", "source_name": "simon frith", "target_name": "hip hop", "weight": 1.0, "year": 2019}, {"source": "42", "target": "79", "source_name": "simon frith", "target_name": "popular culture", "weight": 2.0, "year": 2019}, {"source": "42", "target": "82", "source_name": "simon frith", "target_name": "heavy metal", "weight": 1.0, "year": 2019}, {"source": "42", "target": "88", "source_name": "simon frith", "target_name": "oxford university press", "weight": 1.0, "year": 2019}, {"source": "43", "target": "48", "source_name": "music education", "target_name": "pop music", "weight": 2.0, "year": 2019}, {"source": "43", "target": "49", "source_name": "music education", "target_name": "music theory", "weight": 3.0, "year": 2019}, {"source": "43", "target": "51", "source_name": "music education", "target_name": "cultural identity", "weight": 1.0, "year": 2019}, {"source": "43", "target": "52", "source_name": "music education", "target_name": "folk song", "weight": 1.0, "year": 2019}, {"source": "43", "target": "53", "source_name": "music education", "target_name": "popular music", "weight": 8.0, "year": 2019}, {"source": "43", "target": "57", "source_name": "music education", "target_name": "north america", "weight": 1.0, "year": 2019}, {"source": "43", "target": "60", "source_name": "music education", "target_name": "cultural studies", "weight": 2.0, "year": 2019}, {"source": "43", "target": "66", "source_name": "music education", "target_name": "hong kong", "weight": 1.0, "year": 2019}, {"source": "43", "target": "69", "source_name": "music education", "target_name": "classical music", "weight": 4.0, "year": 2019}, {"source": "43", "target": "74", "source_name": "music education", "target_name": "united states", "weight": 1.0, "year": 2019}, {"source": "43", "target": "77", "source_name": "music education", "target_name": "rock music", "weight": 6.0, "year": 2019}, {"source": "43", "target": "79", "source_name": "music education", "target_name": "popular culture", "weight": 1.0, "year": 2019}, {"source": "43", "target": "80", "source_name": "music education", "target_name": "folk music", "weight": 6.0, "year": 2019}, {"source": "43", "target": "82", "source_name": "music education", "target_name": "heavy metal", "weight": 1.0, "year": 2019}, {"source": "44", "target": "46", "source_name": "alternative rock", "target_name": "music festival", "weight": 1.0, "year": 2019}, {"source": "44", "target": "47", "source_name": "alternative rock", "target_name": "hard rock", "weight": 3.0, "year": 2019}, {"source": "44", "target": "48", "source_name": "alternative rock", "target_name": "pop music", "weight": 1.0, "year": 2019}, {"source": "44", "target": "51", "source_name": "alternative rock", "target_name": "cultural identity", "weight": 1.0, "year": 2019}, {"source": "44", "target": "53", "source_name": "alternative rock", "target_name": "popular music", "weight": 11.0, "year": 2019}, {"source": "44", "target": "57", "source_name": "alternative rock", "target_name": "north america", "weight": 3.0, "year": 2019}, {"source": "44", "target": "61", "source_name": "alternative rock", "target_name": "progressive rock", "weight": 1.0, "year": 2019}, {"source": "44", "target": "65", "source_name": "alternative rock", "target_name": "country music", "weight": 3.0, "year": 2019}, {"source": "44", "target": "67", "source_name": "alternative rock", "target_name": "rock art", "weight": 1.0, "year": 2019}, {"source": "44", "target": "73", "source_name": "alternative rock", "target_name": "southern rock", "weight": 1.0, "year": 2019}, {"source": "44", "target": "74", "source_name": "alternative rock", "target_name": "united states", "weight": 2.0, "year": 2019}, {"source": "44", "target": "77", "source_name": "alternative rock", "target_name": "rock music", "weight": 8.0, "year": 2019}, {"source": "44", "target": "78", "source_name": "alternative rock", "target_name": "hip hop", "weight": 1.0, "year": 2019}, {"source": "44", "target": "79", "source_name": "alternative rock", "target_name": "popular culture", "weight": 1.0, "year": 2019}, {"source": "44", "target": "80", "source_name": "alternative rock", "target_name": "folk music", "weight": 1.0, "year": 2019}, {"source": "44", "target": "82", "source_name": "alternative rock", "target_name": "heavy metal", "weight": 2.0, "year": 2019}, {"source": "45", "target": "77", "source_name": "double bass", "target_name": "rock music", "weight": 2.0, "year": 2019}, {"source": "46", "target": "47", "source_name": "music festival", "target_name": "hard rock", "weight": 1.0, "year": 2019}, {"source": "46", "target": "48", "source_name": "music festival", "target_name": "pop music", "weight": 2.0, "year": 2019}, {"source": "46", "target": "53", "source_name": "music festival", "target_name": "popular music", "weight": 2.0, "year": 2019}, {"source": "46", "target": "61", "source_name": "music festival", "target_name": "progressive rock", "weight": 1.0, "year": 2019}, {"source": "46", "target": "65", "source_name": "music festival", "target_name": "country music", "weight": 1.0, "year": 2019}, {"source": "46", "target": "66", "source_name": "music festival", "target_name": "hong kong", "weight": 1.0, "year": 2019}, {"source": "46", "target": "69", "source_name": "music festival", "target_name": "classical music", "weight": 3.0, "year": 2019}, {"source": "46", "target": "77", "source_name": "music festival", "target_name": "rock music", "weight": 7.0, "year": 2019}, {"source": "46", "target": "78", "source_name": "music festival", "target_name": "hip hop", "weight": 1.0, "year": 2019}, {"source": "46", "target": "80", "source_name": "music festival", "target_name": "folk music", "weight": 2.0, "year": 2019}, {"source": "46", "target": "82", "source_name": "music festival", "target_name": "heavy metal", "weight": 1.0, "year": 2019}, {"source": "46", "target": "85", "source_name": "music festival", "target_name": "jewish music", "weight": 1.0, "year": 2019}, {"source": "46", "target": "86", "source_name": "music festival", "target_name": "south korea", "weight": 2.0, "year": 2019}, {"source": "47", "target": "48", "source_name": "hard rock", "target_name": "pop music", "weight": 2.0, "year": 2019}, {"source": "47", "target": "51", "source_name": "hard rock", "target_name": "cultural identity", "weight": 1.0, "year": 2019}, {"source": "47", "target": "53", "source_name": "hard rock", "target_name": "popular music", "weight": 5.0, "year": 2019}, {"source": "47", "target": "56", "source_name": "hard rock", "target_name": "bruce springsteen", "weight": 1.0, "year": 2019}, {"source": "47", "target": "57", "source_name": "hard rock", "target_name": "north america", "weight": 1.0, "year": 2019}, {"source": "47", "target": "59", "source_name": "hard rock", "target_name": "college students", "weight": 1.0, "year": 2019}, {"source": "47", "target": "61", "source_name": "hard rock", "target_name": "progressive rock", "weight": 3.0, "year": 2019}, {"source": "47", "target": "65", "source_name": "hard rock", "target_name": "country music", "weight": 2.0, "year": 2019}, {"source": "47", "target": "67", "source_name": "hard rock", "target_name": "rock art", "weight": 1.0, "year": 2019}, {"source": "47", "target": "69", "source_name": "hard rock", "target_name": "classical music", "weight": 2.0, "year": 2019}, {"source": "47", "target": "74", "source_name": "hard rock", "target_name": "united states", "weight": 1.0, "year": 2019}, {"source": "47", "target": "77", "source_name": "hard rock", "target_name": "rock music", "weight": 15.0, "year": 2019}, {"source": "47", "target": "78", "source_name": "hard rock", "target_name": "hip hop", "weight": 1.0, "year": 2019}, {"source": "47", "target": "79", "source_name": "hard rock", "target_name": "popular culture", "weight": 2.0, "year": 2019}, {"source": "47", "target": "82", "source_name": "hard rock", "target_name": "heavy metal", "weight": 10.0, "year": 2019}, {"source": "47", "target": "83", "source_name": "hard rock", "target_name": "folk rock", "weight": 1.0, "year": 2019}, {"source": "47", "target": "89", "source_name": "hard rock", "target_name": "electronic music", "weight": 1.0, "year": 2019}, {"source": "48", "target": "49", "source_name": "pop music", "target_name": "music theory", "weight": 1.0, "year": 2019}, {"source": "48", "target": "51", "source_name": "pop music", "target_name": "cultural identity", "weight": 3.0, "year": 2019}, {"source": "48", "target": "52", "source_name": "pop music", "target_name": "folk song", "weight": 3.0, "year": 2019}, {"source": "48", "target": "53", "source_name": "pop music", "target_name": "popular music", "weight": 47.0, "year": 2019}, {"source": "48", "target": "55", "source_name": "pop music", "target_name": "rock criticism", "weight": 2.0, "year": 2019}, {"source": "48", "target": "57", "source_name": "pop music", "target_name": "north america", "weight": 3.0, "year": 2019}, {"source": "48", "target": "58", "source_name": "pop music", "target_name": "music therapy", "weight": 1.0, "year": 2019}, {"source": "48", "target": "59", "source_name": "pop music", "target_name": "college students", "weight": 3.0, "year": 2019}, {"source": "48", "target": "60", "source_name": "pop music", "target_name": "cultural studies", "weight": 1.0, "year": 2019}, {"source": "48", "target": "62", "source_name": "pop music", "target_name": "led zeppelin", "weight": 2.0, "year": 2019}, {"source": "48", "target": "64", "source_name": "pop music", "target_name": "english language", "weight": 2.0, "year": 2019}, {"source": "48", "target": "65", "source_name": "pop music", "target_name": "country music", "weight": 2.0, "year": 2019}, {"source": "48", "target": "66", "source_name": "pop music", "target_name": "hong kong", "weight": 4.0, "year": 2019}, {"source": "48", "target": "67", "source_name": "pop music", "target_name": "rock art", "weight": 3.0, "year": 2019}, {"source": "48", "target": "69", "source_name": "pop music", "target_name": "classical music", "weight": 9.0, "year": 2019}, {"source": "48", "target": "70", "source_name": "pop music", "target_name": "world war", "weight": 2.0, "year": 2019}, {"source": "48", "target": "71", "source_name": "pop music", "target_name": "latin american", "weight": 1.0, "year": 2019}, {"source": "48", "target": "72", "source_name": "pop music", "target_name": "jimi hendrix", "weight": 3.0, "year": 2019}, {"source": "48", "target": "74", "source_name": "pop music", "target_name": "united states", "weight": 6.0, "year": 2019}, {"source": "48", "target": "76", "source_name": "pop music", "target_name": "los angeles", "weight": 1.0, "year": 2019}, {"source": "48", "target": "77", "source_name": "pop music", "target_name": "rock music", "weight": 41.0, "year": 2019}, {"source": "48", "target": "78", "source_name": "pop music", "target_name": "hip hop", "weight": 4.0, "year": 2019}, {"source": "48", "target": "79", "source_name": "pop music", "target_name": "popular culture", "weight": 6.0, "year": 2019}, {"source": "48", "target": "80", "source_name": "pop music", "target_name": "folk music", "weight": 7.0, "year": 2019}, {"source": "48", "target": "82", "source_name": "pop music", "target_name": "heavy metal", "weight": 2.0, "year": 2019}, {"source": "48", "target": "83", "source_name": "pop music", "target_name": "folk rock", "weight": 2.0, "year": 2019}, {"source": "48", "target": "87", "source_name": "pop music", "target_name": "music hall", "weight": 1.0, "year": 2019}, {"source": "49", "target": "53", "source_name": "music theory", "target_name": "popular music", "weight": 6.0, "year": 2019}, {"source": "49", "target": "54", "source_name": "music theory", "target_name": "american popular music", "weight": 1.0, "year": 2019}, {"source": "49", "target": "55", "source_name": "music theory", "target_name": "rock criticism", "weight": 1.0, "year": 2019}, {"source": "49", "target": "57", "source_name": "music theory", "target_name": "north america", "weight": 2.0, "year": 2019}, {"source": "49", "target": "61", "source_name": "music theory", "target_name": "progressive rock", "weight": 1.0, "year": 2019}, {"source": "49", "target": "69", "source_name": "music theory", "target_name": "classical music", "weight": 1.0, "year": 2019}, {"source": "49", "target": "72", "source_name": "music theory", "target_name": "jimi hendrix", "weight": 1.0, "year": 2019}, {"source": "49", "target": "77", "source_name": "music theory", "target_name": "rock music", "weight": 5.0, "year": 2019}, {"source": "49", "target": "78", "source_name": "music theory", "target_name": "hip hop", "weight": 1.0, "year": 2019}, {"source": "49", "target": "88", "source_name": "music theory", "target_name": "oxford university press", "weight": 2.0, "year": 2019}, {"source": "49", "target": "89", "source_name": "music theory", "target_name": "electronic music", "weight": 1.0, "year": 2019}, {"source": "50", "target": "53", "source_name": "hollywood film", "target_name": "popular music", "weight": 1.0, "year": 2019}, {"source": "50", "target": "60", "source_name": "hollywood film", "target_name": "cultural studies", "weight": 1.0, "year": 2019}, {"source": "50", "target": "79", "source_name": "hollywood film", "target_name": "popular culture", "weight": 1.0, "year": 2019}, {"source": "50", "target": "81", "source_name": "hollywood film", "target_name": "avant garde", "weight": 1.0, "year": 2019}, {"source": "50", "target": "88", "source_name": "hollywood film", "target_name": "oxford university press", "weight": 1.0, "year": 2019}, {"source": "51", "target": "52", "source_name": "cultural identity", "target_name": "folk song", "weight": 1.0, "year": 2019}, {"source": "51", "target": "53", "source_name": "cultural identity", "target_name": "popular music", "weight": 3.0, "year": 2019}, {"source": "51", "target": "60", "source_name": "cultural identity", "target_name": "cultural studies", "weight": 2.0, "year": 2019}, {"source": "51", "target": "65", "source_name": "cultural identity", "target_name": "country music", "weight": 1.0, "year": 2019}, {"source": "51", "target": "66", "source_name": "cultural identity", "target_name": "hong kong", "weight": 1.0, "year": 2019}, {"source": "51", "target": "72", "source_name": "cultural identity", "target_name": "jimi hendrix", "weight": 2.0, "year": 2019}, {"source": "51", "target": "74", "source_name": "cultural identity", "target_name": "united states", "weight": 2.0, "year": 2019}, {"source": "51", "target": "77", "source_name": "cultural identity", "target_name": "rock music", "weight": 7.0, "year": 2019}, {"source": "51", "target": "79", "source_name": "cultural identity", "target_name": "popular culture", "weight": 2.0, "year": 2019}, {"source": "51", "target": "80", "source_name": "cultural identity", "target_name": "folk music", "weight": 1.0, "year": 2019}, {"source": "51", "target": "82", "source_name": "cultural identity", "target_name": "heavy metal", "weight": 1.0, "year": 2019}, {"source": "52", "target": "53", "source_name": "folk song", "target_name": "popular music", "weight": 11.0, "year": 2019}, {"source": "52", "target": "54", "source_name": "folk song", "target_name": "american popular music", "weight": 2.0, "year": 2019}, {"source": "52", "target": "65", "source_name": "folk song", "target_name": "country music", "weight": 2.0, "year": 2019}, {"source": "52", "target": "66", "source_name": "folk song", "target_name": "hong kong", "weight": 1.0, "year": 2019}, {"source": "52", "target": "69", "source_name": "folk song", "target_name": "classical music", "weight": 2.0, "year": 2019}, {"source": "52", "target": "74", "source_name": "folk song", "target_name": "united states", "weight": 1.0, "year": 2019}, {"source": "52", "target": "77", "source_name": "folk song", "target_name": "rock music", "weight": 4.0, "year": 2019}, {"source": "52", "target": "80", "source_name": "folk song", "target_name": "folk music", "weight": 9.0, "year": 2019}, {"source": "52", "target": "87", "source_name": "folk song", "target_name": "music hall", "weight": 1.0, "year": 2019}, {"source": "52", "target": "89", "source_name": "folk song", "target_name": "electronic music", "weight": 1.0, "year": 2019}, {"source": "53", "target": "54", "source_name": "popular music", "target_name": "american popular music", "weight": 20.0, "year": 2019}, {"source": "53", "target": "55", "source_name": "popular music", "target_name": "rock criticism", "weight": 7.0, "year": 2019}, {"source": "53", "target": "56", "source_name": "popular music", "target_name": "bruce springsteen", "weight": 2.0, "year": 2019}, {"source": "53", "target": "57", "source_name": "popular music", "target_name": "north america", "weight": 9.0, "year": 2019}, {"source": "53", "target": "58", "source_name": "popular music", "target_name": "music therapy", "weight": 1.0, "year": 2019}, {"source": "53", "target": "59", "source_name": "popular music", "target_name": "college students", "weight": 3.0, "year": 2019}, {"source": "53", "target": "60", "source_name": "popular music", "target_name": "cultural studies", "weight": 10.0, "year": 2019}, {"source": "53", "target": "61", "source_name": "popular music", "target_name": "progressive rock", "weight": 16.0, "year": 2019}, {"source": "53", "target": "62", "source_name": "popular music", "target_name": "led zeppelin", "weight": 3.0, "year": 2019}, {"source": "53", "target": "64", "source_name": "popular music", "target_name": "english language", "weight": 2.0, "year": 2019}, {"source": "53", "target": "65", "source_name": "popular music", "target_name": "country music", "weight": 11.0, "year": 2019}, {"source": "53", "target": "66", "source_name": "popular music", "target_name": "hong kong", "weight": 4.0, "year": 2019}, {"source": "53", "target": "67", "source_name": "popular music", "target_name": "rock art", "weight": 9.0, "year": 2019}, {"source": "53", "target": "69", "source_name": "popular music", "target_name": "classical music", "weight": 20.0, "year": 2019}, {"source": "53", "target": "70", "source_name": "popular music", "target_name": "world war", "weight": 6.0, "year": 2019}, {"source": "53", "target": "71", "source_name": "popular music", "target_name": "latin american", "weight": 3.0, "year": 2019}, {"source": "53", "target": "72", "source_name": "popular music", "target_name": "jimi hendrix", "weight": 5.0, "year": 2019}, {"source": "53", "target": "73", "source_name": "popular music", "target_name": "southern rock", "weight": 2.0, "year": 2019}, {"source": "53", "target": "74", "source_name": "popular music", "target_name": "united states", "weight": 25.0, "year": 2019}, {"source": "53", "target": "75", "source_name": "popular music", "target_name": "world war ii", "weight": 4.0, "year": 2019}, {"source": "53", "target": "76", "source_name": "popular music", "target_name": "los angeles", "weight": 6.0, "year": 2019}, {"source": "53", "target": "77", "source_name": "popular music", "target_name": "rock music", "weight": 152.0, "year": 2019}, {"source": "53", "target": "78", "source_name": "popular music", "target_name": "hip hop", "weight": 13.0, "year": 2019}, {"source": "53", "target": "79", "source_name": "popular music", "target_name": "popular culture", "weight": 29.0, "year": 2019}, {"source": "53", "target": "80", "source_name": "popular music", "target_name": "folk music", "weight": 22.0, "year": 2019}, {"source": "53", "target": "82", "source_name": "popular music", "target_name": "heavy metal", "weight": 15.0, "year": 2019}, {"source": "53", "target": "83", "source_name": "popular music", "target_name": "folk rock", "weight": 3.0, "year": 2019}, {"source": "53", "target": "85", "source_name": "popular music", "target_name": "jewish music", "weight": 2.0, "year": 2019}, {"source": "53", "target": "87", "source_name": "popular music", "target_name": "music hall", "weight": 5.0, "year": 2019}, {"source": "53", "target": "88", "source_name": "popular music", "target_name": "oxford university press", "weight": 4.0, "year": 2019}, {"source": "53", "target": "89", "source_name": "popular music", "target_name": "electronic music", "weight": 11.0, "year": 2019}, {"source": "53", "target": "90", "source_name": "popular music", "target_name": "blues rock", "weight": 1.0, "year": 2019}, {"source": "54", "target": "55", "source_name": "american popular music", "target_name": "rock criticism", "weight": 1.0, "year": 2019}, {"source": "54", "target": "57", "source_name": "american popular music", "target_name": "north america", "weight": 2.0, "year": 2019}, {"source": "54", "target": "65", "source_name": "american popular music", "target_name": "country music", "weight": 5.0, "year": 2019}, {"source": "54", "target": "69", "source_name": "american popular music", "target_name": "classical music", "weight": 3.0, "year": 2019}, {"source": "54", "target": "70", "source_name": "american popular music", "target_name": "world war", "weight": 1.0, "year": 2019}, {"source": "54", "target": "71", "source_name": "american popular music", "target_name": "latin american", "weight": 1.0, "year": 2019}, {"source": "54", "target": "74", "source_name": "american popular music", "target_name": "united states", "weight": 5.0, "year": 2019}, {"source": "54", "target": "75", "source_name": "american popular music", "target_name": "world war ii", "weight": 1.0, "year": 2019}, {"source": "54", "target": "76", "source_name": "american popular music", "target_name": "los angeles", "weight": 1.0, "year": 2019}, {"source": "54", "target": "77", "source_name": "american popular music", "target_name": "rock music", "weight": 7.0, "year": 2019}, {"source": "54", "target": "78", "source_name": "american popular music", "target_name": "hip hop", "weight": 2.0, "year": 2019}, {"source": "54", "target": "79", "source_name": "american popular music", "target_name": "popular culture", "weight": 1.0, "year": 2019}, {"source": "54", "target": "80", "source_name": "american popular music", "target_name": "folk music", "weight": 1.0, "year": 2019}, {"source": "54", "target": "88", "source_name": "american popular music", "target_name": "oxford university press", "weight": 1.0, "year": 2019}, {"source": "54", "target": "89", "source_name": "american popular music", "target_name": "electronic music", "weight": 1.0, "year": 2019}, {"source": "55", "target": "56", "source_name": "rock criticism", "target_name": "bruce springsteen", "weight": 1.0, "year": 2019}, {"source": "55", "target": "57", "source_name": "rock criticism", "target_name": "north america", "weight": 1.0, "year": 2019}, {"source": "55", "target": "61", "source_name": "rock criticism", "target_name": "progressive rock", "weight": 3.0, "year": 2019}, {"source": "55", "target": "62", "source_name": "rock criticism", "target_name": "led zeppelin", "weight": 1.0, "year": 2019}, {"source": "55", "target": "65", "source_name": "rock criticism", "target_name": "country music", "weight": 1.0, "year": 2019}, {"source": "55", "target": "69", "source_name": "rock criticism", "target_name": "classical music", "weight": 1.0, "year": 2019}, {"source": "55", "target": "74", "source_name": "rock criticism", "target_name": "united states", "weight": 2.0, "year": 2019}, {"source": "55", "target": "77", "source_name": "rock criticism", "target_name": "rock music", "weight": 5.0, "year": 2019}, {"source": "55", "target": "78", "source_name": "rock criticism", "target_name": "hip hop", "weight": 1.0, "year": 2019}, {"source": "55", "target": "79", "source_name": "rock criticism", "target_name": "popular culture", "weight": 1.0, "year": 2019}, {"source": "55", "target": "82", "source_name": "rock criticism", "target_name": "heavy metal", "weight": 1.0, "year": 2019}, {"source": "55", "target": "88", "source_name": "rock criticism", "target_name": "oxford university press", "weight": 1.0, "year": 2019}, {"source": "56", "target": "67", "source_name": "bruce springsteen", "target_name": "rock art", "weight": 1.0, "year": 2019}, {"source": "56", "target": "72", "source_name": "bruce springsteen", "target_name": "jimi hendrix", "weight": 1.0, "year": 2019}, {"source": "56", "target": "77", "source_name": "bruce springsteen", "target_name": "rock music", "weight": 3.0, "year": 2019}, {"source": "56", "target": "78", "source_name": "bruce springsteen", "target_name": "hip hop", "weight": 1.0, "year": 2019}, {"source": "56", "target": "79", "source_name": "bruce springsteen", "target_name": "popular culture", "weight": 2.0, "year": 2019}, {"source": "56", "target": "82", "source_name": "bruce springsteen", "target_name": "heavy metal", "weight": 1.0, "year": 2019}, {"source": "57", "target": "61", "source_name": "north america", "target_name": "progressive rock", "weight": 1.0, "year": 2019}, {"source": "57", "target": "65", "source_name": "north america", "target_name": "country music", "weight": 2.0, "year": 2019}, {"source": "57", "target": "71", "source_name": "north america", "target_name": "latin american", "weight": 1.0, "year": 2019}, {"source": "57", "target": "73", "source_name": "north america", "target_name": "southern rock", "weight": 1.0, "year": 2019}, {"source": "57", "target": "74", "source_name": "north america", "target_name": "united states", "weight": 3.0, "year": 2019}, {"source": "57", "target": "77", "source_name": "north america", "target_name": "rock music", "weight": 8.0, "year": 2019}, {"source": "57", "target": "78", "source_name": "north america", "target_name": "hip hop", "weight": 1.0, "year": 2019}, {"source": "57", "target": "80", "source_name": "north america", "target_name": "folk music", "weight": 2.0, "year": 2019}, {"source": "57", "target": "82", "source_name": "north america", "target_name": "heavy metal", "weight": 1.0, "year": 2019}, {"source": "58", "target": "64", "source_name": "music therapy", "target_name": "english language", "weight": 1.0, "year": 2019}, {"source": "58", "target": "74", "source_name": "music therapy", "target_name": "united states", "weight": 1.0, "year": 2019}, {"source": "58", "target": "77", "source_name": "music therapy", "target_name": "rock music", "weight": 3.0, "year": 2019}, {"source": "59", "target": "69", "source_name": "college students", "target_name": "classical music", "weight": 1.0, "year": 2019}, {"source": "59", "target": "74", "source_name": "college students", "target_name": "united states", "weight": 1.0, "year": 2019}, {"source": "59", "target": "77", "source_name": "college students", "target_name": "rock music", "weight": 5.0, "year": 2019}, {"source": "59", "target": "82", "source_name": "college students", "target_name": "heavy metal", "weight": 2.0, "year": 2019}, {"source": "60", "target": "61", "source_name": "cultural studies", "target_name": "progressive rock", "weight": 1.0, "year": 2019}, {"source": "60", "target": "62", "source_name": "cultural studies", "target_name": "led zeppelin", "weight": 1.0, "year": 2019}, {"source": "60", "target": "71", "source_name": "cultural studies", "target_name": "latin american", "weight": 1.0, "year": 2019}, {"source": "60", "target": "74", "source_name": "cultural studies", "target_name": "united states", "weight": 1.0, "year": 2019}, {"source": "60", "target": "76", "source_name": "cultural studies", "target_name": "los angeles", "weight": 1.0, "year": 2019}, {"source": "60", "target": "77", "source_name": "cultural studies", "target_name": "rock music", "weight": 9.0, "year": 2019}, {"source": "60", "target": "79", "source_name": "cultural studies", "target_name": "popular culture", "weight": 6.0, "year": 2019}, {"source": "60", "target": "80", "source_name": "cultural studies", "target_name": "folk music", "weight": 2.0, "year": 2019}, {"source": "60", "target": "81", "source_name": "cultural studies", "target_name": "avant garde", "weight": 1.0, "year": 2019}, {"source": "60", "target": "85", "source_name": "cultural studies", "target_name": "jewish music", "weight": 1.0, "year": 2019}, {"source": "60", "target": "87", "source_name": "cultural studies", "target_name": "music hall", "weight": 1.0, "year": 2019}, {"source": "60", "target": "88", "source_name": "cultural studies", "target_name": "oxford university press", "weight": 4.0, "year": 2019}, {"source": "60", "target": "89", "source_name": "cultural studies", "target_name": "electronic music", "weight": 1.0, "year": 2019}, {"source": "61", "target": "62", "source_name": "progressive rock", "target_name": "led zeppelin", "weight": 1.0, "year": 2019}, {"source": "61", "target": "67", "source_name": "progressive rock", "target_name": "rock art", "weight": 1.0, "year": 2019}, {"source": "61", "target": "69", "source_name": "progressive rock", "target_name": "classical music", "weight": 4.0, "year": 2019}, {"source": "61", "target": "72", "source_name": "progressive rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2019}, {"source": "61", "target": "74", "source_name": "progressive rock", "target_name": "united states", "weight": 3.0, "year": 2019}, {"source": "61", "target": "77", "source_name": "progressive rock", "target_name": "rock music", "weight": 26.0, "year": 2019}, {"source": "61", "target": "80", "source_name": "progressive rock", "target_name": "folk music", "weight": 4.0, "year": 2019}, {"source": "61", "target": "82", "source_name": "progressive rock", "target_name": "heavy metal", "weight": 3.0, "year": 2019}, {"source": "61", "target": "83", "source_name": "progressive rock", "target_name": "folk rock", "weight": 1.0, "year": 2019}, {"source": "61", "target": "88", "source_name": "progressive rock", "target_name": "oxford university press", "weight": 2.0, "year": 2019}, {"source": "61", "target": "89", "source_name": "progressive rock", "target_name": "electronic music", "weight": 1.0, "year": 2019}, {"source": "62", "target": "67", "source_name": "led zeppelin", "target_name": "rock art", "weight": 1.0, "year": 2019}, {"source": "62", "target": "69", "source_name": "led zeppelin", "target_name": "classical music", "weight": 2.0, "year": 2019}, {"source": "62", "target": "72", "source_name": "led zeppelin", "target_name": "jimi hendrix", "weight": 2.0, "year": 2019}, {"source": "62", "target": "74", "source_name": "led zeppelin", "target_name": "united states", "weight": 1.0, "year": 2019}, {"source": "62", "target": "77", "source_name": "led zeppelin", "target_name": "rock music", "weight": 4.0, "year": 2019}, {"source": "62", "target": "78", "source_name": "led zeppelin", "target_name": "hip hop", "weight": 1.0, "year": 2019}, {"source": "62", "target": "80", "source_name": "led zeppelin", "target_name": "folk music", "weight": 1.0, "year": 2019}, {"source": "62", "target": "82", "source_name": "led zeppelin", "target_name": "heavy metal", "weight": 2.0, "year": 2019}, {"source": "62", "target": "88", "source_name": "led zeppelin", "target_name": "oxford university press", "weight": 1.0, "year": 2019}, {"source": "63", "target": "77", "source_name": "post rock", "target_name": "rock music", "weight": 1.0, "year": 2019}, {"source": "64", "target": "66", "source_name": "english language", "target_name": "hong kong", "weight": 1.0, "year": 2019}, {"source": "64", "target": "67", "source_name": "english language", "target_name": "rock art", "weight": 1.0, "year": 2019}, {"source": "64", "target": "70", "source_name": "english language", "target_name": "world war", "weight": 1.0, "year": 2019}, {"source": "64", "target": "74", "source_name": "english language", "target_name": "united states", "weight": 2.0, "year": 2019}, {"source": "64", "target": "77", "source_name": "english language", "target_name": "rock music", "weight": 2.0, "year": 2019}, {"source": "64", "target": "79", "source_name": "english language", "target_name": "popular culture", "weight": 1.0, "year": 2019}, {"source": "64", "target": "83", "source_name": "english language", "target_name": "folk rock", "weight": 1.0, "year": 2019}, {"source": "65", "target": "69", "source_name": "country music", "target_name": "classical music", "weight": 4.0, "year": 2019}, {"source": "65", "target": "72", "source_name": "country music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2019}, {"source": "65", "target": "73", "source_name": "country music", "target_name": "southern rock", "weight": 2.0, "year": 2019}, {"source": "65", "target": "74", "source_name": "country music", "target_name": "united states", "weight": 3.0, "year": 2019}, {"source": "65", "target": "77", "source_name": "country music", "target_name": "rock music", "weight": 5.0, "year": 2019}, {"source": "65", "target": "78", "source_name": "country music", "target_name": "hip hop", "weight": 1.0, "year": 2019}, {"source": "65", "target": "79", "source_name": "country music", "target_name": "popular culture", "weight": 2.0, "year": 2019}, {"source": "65", "target": "80", "source_name": "country music", "target_name": "folk music", "weight": 4.0, "year": 2019}, {"source": "65", "target": "82", "source_name": "country music", "target_name": "heavy metal", "weight": 2.0, "year": 2019}, {"source": "65", "target": "89", "source_name": "country music", "target_name": "electronic music", "weight": 2.0, "year": 2019}, {"source": "66", "target": "67", "source_name": "hong kong", "target_name": "rock art", "weight": 1.0, "year": 2019}, {"source": "66", "target": "77", "source_name": "hong kong", "target_name": "rock music", "weight": 2.0, "year": 2019}, {"source": "66", "target": "78", "source_name": "hong kong", "target_name": "hip hop", "weight": 1.0, "year": 2019}, {"source": "66", "target": "80", "source_name": "hong kong", "target_name": "folk music", "weight": 1.0, "year": 2019}, {"source": "66", "target": "83", "source_name": "hong kong", "target_name": "folk rock", "weight": 1.0, "year": 2019}, {"source": "66", "target": "85", "source_name": "hong kong", "target_name": "jewish music", "weight": 1.0, "year": 2019}, {"source": "67", "target": "69", "source_name": "rock art", "target_name": "classical music", "weight": 1.0, "year": 2019}, {"source": "67", "target": "74", "source_name": "rock art", "target_name": "united states", "weight": 1.0, "year": 2019}, {"source": "67", "target": "77", "source_name": "rock art", "target_name": "rock music", "weight": 11.0, "year": 2019}, {"source": "67", "target": "79", "source_name": "rock art", "target_name": "popular culture", "weight": 1.0, "year": 2019}, {"source": "67", "target": "80", "source_name": "rock art", "target_name": "folk music", "weight": 1.0, "year": 2019}, {"source": "67", "target": "82", "source_name": "rock art", "target_name": "heavy metal", "weight": 1.0, "year": 2019}, {"source": "67", "target": "83", "source_name": "rock art", "target_name": "folk rock", "weight": 1.0, "year": 2019}, {"source": "67", "target": "89", "source_name": "rock art", "target_name": "electronic music", "weight": 1.0, "year": 2019}, {"source": "68", "target": "69", "source_name": "hearing loss", "target_name": "classical music", "weight": 1.0, "year": 2019}, {"source": "68", "target": "77", "source_name": "hearing loss", "target_name": "rock music", "weight": 3.0, "year": 2019}, {"source": "69", "target": "70", "source_name": "classical music", "target_name": "world war", "weight": 2.0, "year": 2019}, {"source": "69", "target": "71", "source_name": "classical music", "target_name": "latin american", "weight": 1.0, "year": 2019}, {"source": "69", "target": "72", "source_name": "classical music", "target_name": "jimi hendrix", "weight": 2.0, "year": 2019}, {"source": "69", "target": "74", "source_name": "classical music", "target_name": "united states", "weight": 6.0, "year": 2019}, {"source": "69", "target": "75", "source_name": "classical music", "target_name": "world war ii", "weight": 1.0, "year": 2019}, {"source": "69", "target": "76", "source_name": "classical music", "target_name": "los angeles", "weight": 1.0, "year": 2019}, {"source": "69", "target": "77", "source_name": "classical music", "target_name": "rock music", "weight": 44.0, "year": 2019}, {"source": "69", "target": "78", "source_name": "classical music", "target_name": "hip hop", "weight": 2.0, "year": 2019}, {"source": "69", "target": "79", "source_name": "classical music", "target_name": "popular culture", "weight": 4.0, "year": 2019}, {"source": "69", "target": "80", "source_name": "classical music", "target_name": "folk music", "weight": 6.0, "year": 2019}, {"source": "69", "target": "82", "source_name": "classical music", "target_name": "heavy metal", "weight": 4.0, "year": 2019}, {"source": "69", "target": "87", "source_name": "classical music", "target_name": "music hall", "weight": 2.0, "year": 2019}, {"source": "69", "target": "88", "source_name": "classical music", "target_name": "oxford university press", "weight": 1.0, "year": 2019}, {"source": "69", "target": "89", "source_name": "classical music", "target_name": "electronic music", "weight": 4.0, "year": 2019}, {"source": "70", "target": "74", "source_name": "world war", "target_name": "united states", "weight": 2.0, "year": 2019}, {"source": "70", "target": "75", "source_name": "world war", "target_name": "world war ii", "weight": 6.0, "year": 2019}, {"source": "70", "target": "77", "source_name": "world war", "target_name": "rock music", "weight": 6.0, "year": 2019}, {"source": "70", "target": "79", "source_name": "world war", "target_name": "popular culture", "weight": 1.0, "year": 2019}, {"source": "70", "target": "80", "source_name": "world war", "target_name": "folk music", "weight": 1.0, "year": 2019}, {"source": "70", "target": "87", "source_name": "world war", "target_name": "music hall", "weight": 1.0, "year": 2019}, {"source": "70", "target": "89", "source_name": "world war", "target_name": "electronic music", "weight": 1.0, "year": 2019}, {"source": "71", "target": "74", "source_name": "latin american", "target_name": "united states", "weight": 4.0, "year": 2019}, {"source": "71", "target": "76", "source_name": "latin american", "target_name": "los angeles", "weight": 2.0, "year": 2019}, {"source": "71", "target": "77", "source_name": "latin american", "target_name": "rock music", "weight": 5.0, "year": 2019}, {"source": "71", "target": "79", "source_name": "latin american", "target_name": "popular culture", "weight": 1.0, "year": 2019}, {"source": "72", "target": "74", "source_name": "jimi hendrix", "target_name": "united states", "weight": 2.0, "year": 2019}, {"source": "72", "target": "77", "source_name": "jimi hendrix", "target_name": "rock music", "weight": 8.0, "year": 2019}, {"source": "72", "target": "79", "source_name": "jimi hendrix", "target_name": "popular culture", "weight": 2.0, "year": 2019}, {"source": "72", "target": "80", "source_name": "jimi hendrix", "target_name": "folk music", "weight": 1.0, "year": 2019}, {"source": "72", "target": "89", "source_name": "jimi hendrix", "target_name": "electronic music", "weight": 1.0, "year": 2019}, {"source": "73", "target": "77", "source_name": "southern rock", "target_name": "rock music", "weight": 1.0, "year": 2019}, {"source": "73", "target": "80", "source_name": "southern rock", "target_name": "folk music", "weight": 1.0, "year": 2019}, {"source": "74", "target": "76", "source_name": "united states", "target_name": "los angeles", "weight": 1.0, "year": 2019}, {"source": "74", "target": "77", "source_name": "united states", "target_name": "rock music", "weight": 18.0, "year": 2019}, {"source": "74", "target": "78", "source_name": "united states", "target_name": "hip hop", "weight": 2.0, "year": 2019}, {"source": "74", "target": "79", "source_name": "united states", "target_name": "popular culture", "weight": 3.0, "year": 2019}, {"source": "74", "target": "80", "source_name": "united states", "target_name": "folk music", "weight": 4.0, "year": 2019}, {"source": "74", "target": "88", "source_name": "united states", "target_name": "oxford university press", "weight": 1.0, "year": 2019}, {"source": "74", "target": "89", "source_name": "united states", "target_name": "electronic music", "weight": 3.0, "year": 2019}, {"source": "75", "target": "76", "source_name": "world war ii", "target_name": "los angeles", "weight": 1.0, "year": 2019}, {"source": "75", "target": "77", "source_name": "world war ii", "target_name": "rock music", "weight": 3.0, "year": 2019}, {"source": "75", "target": "80", "source_name": "world war ii", "target_name": "folk music", "weight": 1.0, "year": 2019}, {"source": "76", "target": "77", "source_name": "los angeles", "target_name": "rock music", "weight": 8.0, "year": 2019}, {"source": "76", "target": "79", "source_name": "los angeles", "target_name": "popular culture", "weight": 1.0, "year": 2019}, {"source": "76", "target": "80", "source_name": "los angeles", "target_name": "folk music", "weight": 2.0, "year": 2019}, {"source": "77", "target": "78", "source_name": "rock music", "target_name": "hip hop", "weight": 6.0, "year": 2019}, {"source": "77", "target": "79", "source_name": "rock music", "target_name": "popular culture", "weight": 25.0, "year": 2019}, {"source": "77", "target": "80", "source_name": "rock music", "target_name": "folk music", "weight": 16.0, "year": 2019}, {"source": "77", "target": "82", "source_name": "rock music", "target_name": "heavy metal", "weight": 21.0, "year": 2019}, {"source": "77", "target": "83", "source_name": "rock music", "target_name": "folk rock", "weight": 3.0, "year": 2019}, {"source": "77", "target": "87", "source_name": "rock music", "target_name": "music hall", "weight": 5.0, "year": 2019}, {"source": "77", "target": "88", "source_name": "rock music", "target_name": "oxford university press", "weight": 3.0, "year": 2019}, {"source": "77", "target": "89", "source_name": "rock music", "target_name": "electronic music", "weight": 6.0, "year": 2019}, {"source": "77", "target": "90", "source_name": "rock music", "target_name": "blues rock", "weight": 7.0, "year": 2019}, {"source": "78", "target": "79", "source_name": "hip hop", "target_name": "popular culture", "weight": 2.0, "year": 2019}, {"source": "78", "target": "80", "source_name": "hip hop", "target_name": "folk music", "weight": 3.0, "year": 2019}, {"source": "78", "target": "82", "source_name": "hip hop", "target_name": "heavy metal", "weight": 2.0, "year": 2019}, {"source": "78", "target": "85", "source_name": "hip hop", "target_name": "jewish music", "weight": 1.0, "year": 2019}, {"source": "78", "target": "88", "source_name": "hip hop", "target_name": "oxford university press", "weight": 1.0, "year": 2019}, {"source": "78", "target": "89", "source_name": "hip hop", "target_name": "electronic music", "weight": 1.0, "year": 2019}, {"source": "78", "target": "90", "source_name": "hip hop", "target_name": "blues rock", "weight": 1.0, "year": 2019}, {"source": "79", "target": "80", "source_name": "popular culture", "target_name": "folk music", "weight": 3.0, "year": 2019}, {"source": "79", "target": "82", "source_name": "popular culture", "target_name": "heavy metal", "weight": 3.0, "year": 2019}, {"source": "79", "target": "85", "source_name": "popular culture", "target_name": "jewish music", "weight": 1.0, "year": 2019}, {"source": "79", "target": "87", "source_name": "popular culture", "target_name": "music hall", "weight": 3.0, "year": 2019}, {"source": "79", "target": "88", "source_name": "popular culture", "target_name": "oxford university press", "weight": 1.0, "year": 2019}, {"source": "79", "target": "89", "source_name": "popular culture", "target_name": "electronic music", "weight": 1.0, "year": 2019}, {"source": "80", "target": "82", "source_name": "folk music", "target_name": "heavy metal", "weight": 1.0, "year": 2019}, {"source": "80", "target": "85", "source_name": "folk music", "target_name": "jewish music", "weight": 2.0, "year": 2019}, {"source": "80", "target": "87", "source_name": "folk music", "target_name": "music hall", "weight": 3.0, "year": 2019}, {"source": "80", "target": "88", "source_name": "folk music", "target_name": "oxford university press", "weight": 1.0, "year": 2019}, {"source": "80", "target": "89", "source_name": "folk music", "target_name": "electronic music", "weight": 4.0, "year": 2019}, {"source": "81", "target": "88", "source_name": "avant garde", "target_name": "oxford university press", "weight": 1.0, "year": 2019}, {"source": "82", "target": "83", "source_name": "heavy metal", "target_name": "folk rock", "weight": 2.0, "year": 2019}, {"source": "85", "target": "88", "source_name": "jewish music", "target_name": "oxford university press", "weight": 1.0, "year": 2019}, {"source": "88", "target": "89", "source_name": "oxford university press", "target_name": "electronic music", "weight": 1.0, "year": 2019}]}, {"2020": [{"source": "1", "target": "6", "source_name": "rock star", "target_name": "elvis presley", "weight": 1.0, "year": 2020}, {"source": "1", "target": "7", "source_name": "rock star", "target_name": "nineteenth century", "weight": 1.0, "year": 2020}, {"source": "1", "target": "9", "source_name": "rock star", "target_name": "compact disc", "weight": 1.0, "year": 2020}, {"source": "1", "target": "16", "source_name": "rock star", "target_name": "bob dylan", "weight": 1.0, "year": 2020}, {"source": "1", "target": "19", "source_name": "rock star", "target_name": "music video", "weight": 1.0, "year": 2020}, {"source": "1", "target": "23", "source_name": "rock star", "target_name": "electronic dance music", "weight": 1.0, "year": 2020}, {"source": "1", "target": "24", "source_name": "rock star", "target_name": "punk rock", "weight": 1.0, "year": 2020}, {"source": "1", "target": "28", "source_name": "rock star", "target_name": "high school", "weight": 1.0, "year": 2020}, {"source": "1", "target": "29", "source_name": "rock star", "target_name": "rolling stone", "weight": 2.0, "year": 2020}, {"source": "1", "target": "36", "source_name": "rock star", "target_name": "music industry", "weight": 4.0, "year": 2020}, {"source": "1", "target": "41", "source_name": "rock star", "target_name": "youth culture", "weight": 2.0, "year": 2020}, {"source": "1", "target": "42", "source_name": "rock star", "target_name": "simon frith", "weight": 1.0, "year": 2020}, {"source": "1", "target": "48", "source_name": "rock star", "target_name": "pop music", "weight": 4.0, "year": 2020}, {"source": "1", "target": "51", "source_name": "rock star", "target_name": "cultural identity", "weight": 2.0, "year": 2020}, {"source": "1", "target": "53", "source_name": "rock star", "target_name": "popular music", "weight": 7.0, "year": 2020}, {"source": "1", "target": "56", "source_name": "rock star", "target_name": "bruce springsteen", "weight": 1.0, "year": 2020}, {"source": "1", "target": "57", "source_name": "rock star", "target_name": "north america", "weight": 1.0, "year": 2020}, {"source": "1", "target": "60", "source_name": "rock star", "target_name": "cultural studies", "weight": 1.0, "year": 2020}, {"source": "1", "target": "67", "source_name": "rock star", "target_name": "rock art", "weight": 1.0, "year": 2020}, {"source": "1", "target": "69", "source_name": "rock star", "target_name": "classical music", "weight": 1.0, "year": 2020}, {"source": "1", "target": "74", "source_name": "rock star", "target_name": "united states", "weight": 1.0, "year": 2020}, {"source": "1", "target": "77", "source_name": "rock star", "target_name": "rock music", "weight": 11.0, "year": 2020}, {"source": "1", "target": "79", "source_name": "rock star", "target_name": "popular culture", "weight": 2.0, "year": 2020}, {"source": "1", "target": "82", "source_name": "rock star", "target_name": "heavy metal", "weight": 3.0, "year": 2020}, {"source": "1", "target": "89", "source_name": "rock star", "target_name": "electronic music", "weight": 1.0, "year": 2020}, {"source": "2", "target": "3", "source_name": "indie rock", "target_name": "glam rock", "weight": 1.0, "year": 2020}, {"source": "2", "target": "19", "source_name": "indie rock", "target_name": "music video", "weight": 1.0, "year": 2020}, {"source": "2", "target": "20", "source_name": "indie rock", "target_name": "garage rock", "weight": 1.0, "year": 2020}, {"source": "2", "target": "24", "source_name": "indie rock", "target_name": "punk rock", "weight": 1.0, "year": 2020}, {"source": "2", "target": "27", "source_name": "indie rock", "target_name": "pop rock", "weight": 1.0, "year": 2020}, {"source": "2", "target": "30", "source_name": "indie rock", "target_name": "rock band", "weight": 2.0, "year": 2020}, {"source": "2", "target": "36", "source_name": "indie rock", "target_name": "music industry", "weight": 1.0, "year": 2020}, {"source": "2", "target": "44", "source_name": "indie rock", "target_name": "alternative rock", "weight": 1.0, "year": 2020}, {"source": "2", "target": "47", "source_name": "indie rock", "target_name": "hard rock", "weight": 1.0, "year": 2020}, {"source": "2", "target": "48", "source_name": "indie rock", "target_name": "pop music", "weight": 2.0, "year": 2020}, {"source": "2", "target": "51", "source_name": "indie rock", "target_name": "cultural identity", "weight": 1.0, "year": 2020}, {"source": "2", "target": "53", "source_name": "indie rock", "target_name": "popular music", "weight": 2.0, "year": 2020}, {"source": "2", "target": "67", "source_name": "indie rock", "target_name": "rock art", "weight": 2.0, "year": 2020}, {"source": "2", "target": "69", "source_name": "indie rock", "target_name": "classical music", "weight": 1.0, "year": 2020}, {"source": "2", "target": "72", "source_name": "indie rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2020}, {"source": "2", "target": "74", "source_name": "indie rock", "target_name": "united states", "weight": 1.0, "year": 2020}, {"source": "2", "target": "77", "source_name": "indie rock", "target_name": "rock music", "weight": 6.0, "year": 2020}, {"source": "2", "target": "78", "source_name": "indie rock", "target_name": "hip hop", "weight": 1.0, "year": 2020}, {"source": "2", "target": "80", "source_name": "indie rock", "target_name": "folk music", "weight": 1.0, "year": 2020}, {"source": "3", "target": "20", "source_name": "glam rock", "target_name": "garage rock", "weight": 2.0, "year": 2020}, {"source": "3", "target": "24", "source_name": "glam rock", "target_name": "punk rock", "weight": 2.0, "year": 2020}, {"source": "3", "target": "27", "source_name": "glam rock", "target_name": "pop rock", "weight": 1.0, "year": 2020}, {"source": "3", "target": "41", "source_name": "glam rock", "target_name": "youth culture", "weight": 1.0, "year": 2020}, {"source": "3", "target": "44", "source_name": "glam rock", "target_name": "alternative rock", "weight": 1.0, "year": 2020}, {"source": "3", "target": "47", "source_name": "glam rock", "target_name": "hard rock", "weight": 1.0, "year": 2020}, {"source": "3", "target": "53", "source_name": "glam rock", "target_name": "popular music", "weight": 1.0, "year": 2020}, {"source": "3", "target": "77", "source_name": "glam rock", "target_name": "rock music", "weight": 3.0, "year": 2020}, {"source": "3", "target": "79", "source_name": "glam rock", "target_name": "popular culture", "weight": 2.0, "year": 2020}, {"source": "3", "target": "87", "source_name": "glam rock", "target_name": "music hall", "weight": 1.0, "year": 2020}, {"source": "4", "target": "7", "source_name": "gregorian chant", "target_name": "nineteenth century", "weight": 1.0, "year": 2020}, {"source": "4", "target": "9", "source_name": "gregorian chant", "target_name": "compact disc", "weight": 1.0, "year": 2020}, {"source": "4", "target": "10", "source_name": "gregorian chant", "target_name": "african american", "weight": 1.0, "year": 2020}, {"source": "4", "target": "19", "source_name": "gregorian chant", "target_name": "music video", "weight": 1.0, "year": 2020}, {"source": "4", "target": "22", "source_name": "gregorian chant", "target_name": "chamber music", "weight": 1.0, "year": 2020}, {"source": "4", "target": "36", "source_name": "gregorian chant", "target_name": "music industry", "weight": 1.0, "year": 2020}, {"source": "4", "target": "37", "source_name": "gregorian chant", "target_name": "middle ages", "weight": 1.0, "year": 2020}, {"source": "4", "target": "38", "source_name": "gregorian chant", "target_name": "summary additional listening", "weight": 1.0, "year": 2020}, {"source": "4", "target": "40", "source_name": "gregorian chant", "target_name": "musical instruments", "weight": 1.0, "year": 2020}, {"source": "4", "target": "48", "source_name": "gregorian chant", "target_name": "pop music", "weight": 1.0, "year": 2020}, {"source": "4", "target": "52", "source_name": "gregorian chant", "target_name": "folk song", "weight": 1.0, "year": 2020}, {"source": "4", "target": "53", "source_name": "gregorian chant", "target_name": "popular music", "weight": 1.0, "year": 2020}, {"source": "4", "target": "54", "source_name": "gregorian chant", "target_name": "american popular music", "weight": 1.0, "year": 2020}, {"source": "4", "target": "65", "source_name": "gregorian chant", "target_name": "country music", "weight": 1.0, "year": 2020}, {"source": "4", "target": "69", "source_name": "gregorian chant", "target_name": "classical music", "weight": 1.0, "year": 2020}, {"source": "4", "target": "74", "source_name": "gregorian chant", "target_name": "united states", "weight": 1.0, "year": 2020}, {"source": "4", "target": "77", "source_name": "gregorian chant", "target_name": "rock music", "weight": 1.0, "year": 2020}, {"source": "4", "target": "80", "source_name": "gregorian chant", "target_name": "folk music", "weight": 1.0, "year": 2020}, {"source": "4", "target": "89", "source_name": "gregorian chant", "target_name": "electronic music", "weight": 1.0, "year": 2020}, {"source": "5", "target": "12", "source_name": "jesus christ superstar", "target_name": "rock opera", "weight": 4.0, "year": 2020}, {"source": "5", "target": "15", "source_name": "jesus christ superstar", "target_name": "musical theatre", "weight": 3.0, "year": 2020}, {"source": "5", "target": "33", "source_name": "jesus christ superstar", "target_name": "jesus christ", "weight": 5.0, "year": 2020}, {"source": "5", "target": "34", "source_name": "jesus christ superstar", "target_name": "mass media", "weight": 1.0, "year": 2020}, {"source": "5", "target": "41", "source_name": "jesus christ superstar", "target_name": "youth culture", "weight": 1.0, "year": 2020}, {"source": "5", "target": "53", "source_name": "jesus christ superstar", "target_name": "popular music", "weight": 1.0, "year": 2020}, {"source": "5", "target": "77", "source_name": "jesus christ superstar", "target_name": "rock music", "weight": 7.0, "year": 2020}, {"source": "5", "target": "89", "source_name": "jesus christ superstar", "target_name": "electronic music", "weight": 1.0, "year": 2020}, {"source": "6", "target": "10", "source_name": "elvis presley", "target_name": "african american", "weight": 1.0, "year": 2020}, {"source": "6", "target": "16", "source_name": "elvis presley", "target_name": "bob dylan", "weight": 4.0, "year": 2020}, {"source": "6", "target": "17", "source_name": "elvis presley", "target_name": "civil rights", "weight": 1.0, "year": 2020}, {"source": "6", "target": "23", "source_name": "elvis presley", "target_name": "electronic dance music", "weight": 1.0, "year": 2020}, {"source": "6", "target": "29", "source_name": "elvis presley", "target_name": "rolling stone", "weight": 2.0, "year": 2020}, {"source": "6", "target": "36", "source_name": "elvis presley", "target_name": "music industry", "weight": 3.0, "year": 2020}, {"source": "6", "target": "40", "source_name": "elvis presley", "target_name": "musical instruments", "weight": 1.0, "year": 2020}, {"source": "6", "target": "41", "source_name": "elvis presley", "target_name": "youth culture", "weight": 1.0, "year": 2020}, {"source": "6", "target": "42", "source_name": "elvis presley", "target_name": "simon frith", "weight": 2.0, "year": 2020}, {"source": "6", "target": "47", "source_name": "elvis presley", "target_name": "hard rock", "weight": 1.0, "year": 2020}, {"source": "6", "target": "48", "source_name": "elvis presley", "target_name": "pop music", "weight": 1.0, "year": 2020}, {"source": "6", "target": "49", "source_name": "elvis presley", "target_name": "music theory", "weight": 1.0, "year": 2020}, {"source": "6", "target": "51", "source_name": "elvis presley", "target_name": "cultural identity", "weight": 1.0, "year": 2020}, {"source": "6", "target": "53", "source_name": "elvis presley", "target_name": "popular music", "weight": 9.0, "year": 2020}, {"source": "6", "target": "54", "source_name": "elvis presley", "target_name": "american popular music", "weight": 3.0, "year": 2020}, {"source": "6", "target": "56", "source_name": "elvis presley", "target_name": "bruce springsteen", "weight": 2.0, "year": 2020}, {"source": "6", "target": "60", "source_name": "elvis presley", "target_name": "cultural studies", "weight": 1.0, "year": 2020}, {"source": "6", "target": "67", "source_name": "elvis presley", "target_name": "rock art", "weight": 1.0, "year": 2020}, {"source": "6", "target": "70", "source_name": "elvis presley", "target_name": "world war", "weight": 1.0, "year": 2020}, {"source": "6", "target": "72", "source_name": "elvis presley", "target_name": "jimi hendrix", "weight": 1.0, "year": 2020}, {"source": "6", "target": "74", "source_name": "elvis presley", "target_name": "united states", "weight": 2.0, "year": 2020}, {"source": "6", "target": "75", "source_name": "elvis presley", "target_name": "world war ii", "weight": 1.0, "year": 2020}, {"source": "6", "target": "77", "source_name": "elvis presley", "target_name": "rock music", "weight": 5.0, "year": 2020}, {"source": "6", "target": "78", "source_name": "elvis presley", "target_name": "hip hop", "weight": 1.0, "year": 2020}, {"source": "6", "target": "79", "source_name": "elvis presley", "target_name": "popular culture", "weight": 2.0, "year": 2020}, {"source": "6", "target": "80", "source_name": "elvis presley", "target_name": "folk music", "weight": 1.0, "year": 2020}, {"source": "6", "target": "82", "source_name": "elvis presley", "target_name": "heavy metal", "weight": 1.0, "year": 2020}, {"source": "7", "target": "9", "source_name": "nineteenth century", "target_name": "compact disc", "weight": 1.0, "year": 2020}, {"source": "7", "target": "10", "source_name": "nineteenth century", "target_name": "african american", "weight": 1.0, "year": 2020}, {"source": "7", "target": "19", "source_name": "nineteenth century", "target_name": "music video", "weight": 1.0, "year": 2020}, {"source": "7", "target": "22", "source_name": "nineteenth century", "target_name": "chamber music", "weight": 1.0, "year": 2020}, {"source": "7", "target": "34", "source_name": "nineteenth century", "target_name": "mass media", "weight": 1.0, "year": 2020}, {"source": "7", "target": "35", "source_name": "nineteenth century", "target_name": "ancient greek", "weight": 1.0, "year": 2020}, {"source": "7", "target": "36", "source_name": "nineteenth century", "target_name": "music industry", "weight": 2.0, "year": 2020}, {"source": "7", "target": "38", "source_name": "nineteenth century", "target_name": "summary additional listening", "weight": 1.0, "year": 2020}, {"source": "7", "target": "40", "source_name": "nineteenth century", "target_name": "musical instruments", "weight": 1.0, "year": 2020}, {"source": "7", "target": "43", "source_name": "nineteenth century", "target_name": "music education", "weight": 1.0, "year": 2020}, {"source": "7", "target": "45", "source_name": "nineteenth century", "target_name": "double bass", "weight": 2.0, "year": 2020}, {"source": "7", "target": "48", "source_name": "nineteenth century", "target_name": "pop music", "weight": 1.0, "year": 2020}, {"source": "7", "target": "49", "source_name": "nineteenth century", "target_name": "music theory", "weight": 1.0, "year": 2020}, {"source": "7", "target": "50", "source_name": "nineteenth century", "target_name": "hollywood film", "weight": 1.0, "year": 2020}, {"source": "7", "target": "52", "source_name": "nineteenth century", "target_name": "folk song", "weight": 3.0, "year": 2020}, {"source": "7", "target": "53", "source_name": "nineteenth century", "target_name": "popular music", "weight": 4.0, "year": 2020}, {"source": "7", "target": "54", "source_name": "nineteenth century", "target_name": "american popular music", "weight": 1.0, "year": 2020}, {"source": "7", "target": "65", "source_name": "nineteenth century", "target_name": "country music", "weight": 1.0, "year": 2020}, {"source": "7", "target": "67", "source_name": "nineteenth century", "target_name": "rock art", "weight": 1.0, "year": 2020}, {"source": "7", "target": "69", "source_name": "nineteenth century", "target_name": "classical music", "weight": 4.0, "year": 2020}, {"source": "7", "target": "70", "source_name": "nineteenth century", "target_name": "world war", "weight": 2.0, "year": 2020}, {"source": "7", "target": "74", "source_name": "nineteenth century", "target_name": "united states", "weight": 2.0, "year": 2020}, {"source": "7", "target": "77", "source_name": "nineteenth century", "target_name": "rock music", "weight": 4.0, "year": 2020}, {"source": "7", "target": "79", "source_name": "nineteenth century", "target_name": "popular culture", "weight": 1.0, "year": 2020}, {"source": "7", "target": "80", "source_name": "nineteenth century", "target_name": "folk music", "weight": 3.0, "year": 2020}, {"source": "7", "target": "85", "source_name": "nineteenth century", "target_name": "jewish music", "weight": 1.0, "year": 2020}, {"source": "7", "target": "87", "source_name": "nineteenth century", "target_name": "music hall", "weight": 1.0, "year": 2020}, {"source": "7", "target": "89", "source_name": "nineteenth century", "target_name": "electronic music", "weight": 1.0, "year": 2020}, {"source": "8", "target": "20", "source_name": "christian rock", "target_name": "garage rock", "weight": 1.0, "year": 2020}, {"source": "8", "target": "36", "source_name": "christian rock", "target_name": "music industry", "weight": 1.0, "year": 2020}, {"source": "8", "target": "44", "source_name": "christian rock", "target_name": "alternative rock", "weight": 1.0, "year": 2020}, {"source": "8", "target": "53", "source_name": "christian rock", "target_name": "popular music", "weight": 2.0, "year": 2020}, {"source": "8", "target": "57", "source_name": "christian rock", "target_name": "north america", "weight": 1.0, "year": 2020}, {"source": "8", "target": "65", "source_name": "christian rock", "target_name": "country music", "weight": 1.0, "year": 2020}, {"source": "8", "target": "73", "source_name": "christian rock", "target_name": "southern rock", "weight": 1.0, "year": 2020}, {"source": "8", "target": "77", "source_name": "christian rock", "target_name": "rock music", "weight": 2.0, "year": 2020}, {"source": "8", "target": "79", "source_name": "christian rock", "target_name": "popular culture", "weight": 2.0, "year": 2020}, {"source": "8", "target": "80", "source_name": "christian rock", "target_name": "folk music", "weight": 1.0, "year": 2020}, {"source": "9", "target": "10", "source_name": "compact disc", "target_name": "african american", "weight": 1.0, "year": 2020}, {"source": "9", "target": "11", "source_name": "compact disc", "target_name": "south africa", "weight": 1.0, "year": 2020}, {"source": "9", "target": "18", "source_name": "compact disc", "target_name": "middle class", "weight": 1.0, "year": 2020}, {"source": "9", "target": "19", "source_name": "compact disc", "target_name": "music video", "weight": 1.0, "year": 2020}, {"source": "9", "target": "24", "source_name": "compact disc", "target_name": "punk rock", "weight": 1.0, "year": 2020}, {"source": "9", "target": "25", "source_name": "compact disc", "target_name": "russian rock", "weight": 1.0, "year": 2020}, {"source": "9", "target": "28", "source_name": "compact disc", "target_name": "high school", "weight": 1.0, "year": 2020}, {"source": "9", "target": "29", "source_name": "compact disc", "target_name": "rolling stone", "weight": 1.0, "year": 2020}, {"source": "9", "target": "30", "source_name": "compact disc", "target_name": "rock band", "weight": 1.0, "year": 2020}, {"source": "9", "target": "36", "source_name": "compact disc", "target_name": "music industry", "weight": 1.0, "year": 2020}, {"source": "9", "target": "37", "source_name": "compact disc", "target_name": "middle ages", "weight": 1.0, "year": 2020}, {"source": "9", "target": "46", "source_name": "compact disc", "target_name": "music festival", "weight": 1.0, "year": 2020}, {"source": "9", "target": "48", "source_name": "compact disc", "target_name": "pop music", "weight": 1.0, "year": 2020}, {"source": "9", "target": "51", "source_name": "compact disc", "target_name": "cultural identity", "weight": 1.0, "year": 2020}, {"source": "9", "target": "53", "source_name": "compact disc", "target_name": "popular music", "weight": 4.0, "year": 2020}, {"source": "9", "target": "61", "source_name": "compact disc", "target_name": "progressive rock", "weight": 1.0, "year": 2020}, {"source": "9", "target": "66", "source_name": "compact disc", "target_name": "hong kong", "weight": 1.0, "year": 2020}, {"source": "9", "target": "74", "source_name": "compact disc", "target_name": "united states", "weight": 1.0, "year": 2020}, {"source": "9", "target": "77", "source_name": "compact disc", "target_name": "rock music", "weight": 2.0, "year": 2020}, {"source": "9", "target": "78", "source_name": "compact disc", "target_name": "hip hop", "weight": 1.0, "year": 2020}, {"source": "9", "target": "79", "source_name": "compact disc", "target_name": "popular culture", "weight": 1.0, "year": 2020}, {"source": "9", "target": "80", "source_name": "compact disc", "target_name": "folk music", "weight": 3.0, "year": 2020}, {"source": "9", "target": "85", "source_name": "compact disc", "target_name": "jewish music", "weight": 2.0, "year": 2020}, {"source": "9", "target": "89", "source_name": "compact disc", "target_name": "electronic music", "weight": 1.0, "year": 2020}, {"source": "10", "target": "11", "source_name": "african american", "target_name": "south africa", "weight": 1.0, "year": 2020}, {"source": "10", "target": "15", "source_name": "african american", "target_name": "musical theatre", "weight": 1.0, "year": 2020}, {"source": "10", "target": "17", "source_name": "african american", "target_name": "civil rights", "weight": 2.0, "year": 2020}, {"source": "10", "target": "19", "source_name": "african american", "target_name": "music video", "weight": 1.0, "year": 2020}, {"source": "10", "target": "21", "source_name": "african american", "target_name": "social protest", "weight": 1.0, "year": 2020}, {"source": "10", "target": "22", "source_name": "african american", "target_name": "chamber music", "weight": 1.0, "year": 2020}, {"source": "10", "target": "23", "source_name": "african american", "target_name": "electronic dance music", "weight": 1.0, "year": 2020}, {"source": "10", "target": "24", "source_name": "african american", "target_name": "punk rock", "weight": 2.0, "year": 2020}, {"source": "10", "target": "29", "source_name": "african american", "target_name": "rolling stone", "weight": 1.0, "year": 2020}, {"source": "10", "target": "36", "source_name": "african american", "target_name": "music industry", "weight": 3.0, "year": 2020}, {"source": "10", "target": "38", "source_name": "african american", "target_name": "summary additional listening", "weight": 1.0, "year": 2020}, {"source": "10", "target": "40", "source_name": "african american", "target_name": "musical instruments", "weight": 1.0, "year": 2020}, {"source": "10", "target": "52", "source_name": "african american", "target_name": "folk song", "weight": 1.0, "year": 2020}, {"source": "10", "target": "53", "source_name": "african american", "target_name": "popular music", "weight": 7.0, "year": 2020}, {"source": "10", "target": "54", "source_name": "african american", "target_name": "american popular music", "weight": 1.0, "year": 2020}, {"source": "10", "target": "61", "source_name": "african american", "target_name": "progressive rock", "weight": 1.0, "year": 2020}, {"source": "10", "target": "62", "source_name": "african american", "target_name": "led zeppelin", "weight": 1.0, "year": 2020}, {"source": "10", "target": "65", "source_name": "african american", "target_name": "country music", "weight": 1.0, "year": 2020}, {"source": "10", "target": "69", "source_name": "african american", "target_name": "classical music", "weight": 2.0, "year": 2020}, {"source": "10", "target": "72", "source_name": "african american", "target_name": "jimi hendrix", "weight": 1.0, "year": 2020}, {"source": "10", "target": "74", "source_name": "african american", "target_name": "united states", "weight": 6.0, "year": 2020}, {"source": "10", "target": "75", "source_name": "african american", "target_name": "world war ii", "weight": 1.0, "year": 2020}, {"source": "10", "target": "77", "source_name": "african american", "target_name": "rock music", "weight": 2.0, "year": 2020}, {"source": "10", "target": "78", "source_name": "african american", "target_name": "hip hop", "weight": 1.0, "year": 2020}, {"source": "10", "target": "79", "source_name": "african american", "target_name": "popular culture", "weight": 2.0, "year": 2020}, {"source": "10", "target": "80", "source_name": "african american", "target_name": "folk music", "weight": 4.0, "year": 2020}, {"source": "10", "target": "82", "source_name": "african american", "target_name": "heavy metal", "weight": 1.0, "year": 2020}, {"source": "10", "target": "89", "source_name": "african american", "target_name": "electronic music", "weight": 1.0, "year": 2020}, {"source": "11", "target": "17", "source_name": "south africa", "target_name": "civil rights", "weight": 1.0, "year": 2020}, {"source": "11", "target": "21", "source_name": "south africa", "target_name": "social protest", "weight": 2.0, "year": 2020}, {"source": "11", "target": "23", "source_name": "south africa", "target_name": "electronic dance music", "weight": 1.0, "year": 2020}, {"source": "11", "target": "25", "source_name": "south africa", "target_name": "russian rock", "weight": 1.0, "year": 2020}, {"source": "11", "target": "36", "source_name": "south africa", "target_name": "music industry", "weight": 1.0, "year": 2020}, {"source": "11", "target": "43", "source_name": "south africa", "target_name": "music education", "weight": 1.0, "year": 2020}, {"source": "11", "target": "46", "source_name": "south africa", "target_name": "music festival", "weight": 3.0, "year": 2020}, {"source": "11", "target": "53", "source_name": "south africa", "target_name": "popular music", "weight": 5.0, "year": 2020}, {"source": "11", "target": "61", "source_name": "south africa", "target_name": "progressive rock", "weight": 1.0, "year": 2020}, {"source": "11", "target": "66", "source_name": "south africa", "target_name": "hong kong", "weight": 1.0, "year": 2020}, {"source": "11", "target": "74", "source_name": "south africa", "target_name": "united states", "weight": 3.0, "year": 2020}, {"source": "11", "target": "78", "source_name": "south africa", "target_name": "hip hop", "weight": 1.0, "year": 2020}, {"source": "11", "target": "80", "source_name": "south africa", "target_name": "folk music", "weight": 3.0, "year": 2020}, {"source": "11", "target": "85", "source_name": "south africa", "target_name": "jewish music", "weight": 1.0, "year": 2020}, {"source": "11", "target": "87", "source_name": "south africa", "target_name": "music hall", "weight": 1.0, "year": 2020}, {"source": "11", "target": "88", "source_name": "south africa", "target_name": "oxford university press", "weight": 1.0, "year": 2020}, {"source": "12", "target": "15", "source_name": "rock opera", "target_name": "musical theatre", "weight": 4.0, "year": 2020}, {"source": "12", "target": "25", "source_name": "rock opera", "target_name": "russian rock", "weight": 1.0, "year": 2020}, {"source": "12", "target": "33", "source_name": "rock opera", "target_name": "jesus christ", "weight": 2.0, "year": 2020}, {"source": "12", "target": "41", "source_name": "rock opera", "target_name": "youth culture", "weight": 2.0, "year": 2020}, {"source": "12", "target": "48", "source_name": "rock opera", "target_name": "pop music", "weight": 1.0, "year": 2020}, {"source": "12", "target": "53", "source_name": "rock opera", "target_name": "popular music", "weight": 1.0, "year": 2020}, {"source": "12", "target": "57", "source_name": "rock opera", "target_name": "north america", "weight": 1.0, "year": 2020}, {"source": "12", "target": "77", "source_name": "rock opera", "target_name": "rock music", "weight": 5.0, "year": 2020}, {"source": "12", "target": "79", "source_name": "rock opera", "target_name": "popular culture", "weight": 2.0, "year": 2020}, {"source": "12", "target": "80", "source_name": "rock opera", "target_name": "folk music", "weight": 1.0, "year": 2020}, {"source": "12", "target": "89", "source_name": "rock opera", "target_name": "electronic music", "weight": 1.0, "year": 2020}, {"source": "13", "target": "69", "source_name": "deep learning", "target_name": "classical music", "weight": 1.0, "year": 2020}, {"source": "15", "target": "33", "source_name": "musical theatre", "target_name": "jesus christ", "weight": 3.0, "year": 2020}, {"source": "15", "target": "53", "source_name": "musical theatre", "target_name": "popular music", "weight": 6.0, "year": 2020}, {"source": "15", "target": "54", "source_name": "musical theatre", "target_name": "american popular music", "weight": 3.0, "year": 2020}, {"source": "15", "target": "57", "source_name": "musical theatre", "target_name": "north america", "weight": 2.0, "year": 2020}, {"source": "15", "target": "65", "source_name": "musical theatre", "target_name": "country music", "weight": 1.0, "year": 2020}, {"source": "15", "target": "70", "source_name": "musical theatre", "target_name": "world war", "weight": 1.0, "year": 2020}, {"source": "15", "target": "74", "source_name": "musical theatre", "target_name": "united states", "weight": 1.0, "year": 2020}, {"source": "15", "target": "77", "source_name": "musical theatre", "target_name": "rock music", "weight": 9.0, "year": 2020}, {"source": "15", "target": "79", "source_name": "musical theatre", "target_name": "popular culture", "weight": 1.0, "year": 2020}, {"source": "15", "target": "87", "source_name": "musical theatre", "target_name": "music hall", "weight": 1.0, "year": 2020}, {"source": "16", "target": "29", "source_name": "bob dylan", "target_name": "rolling stone", "weight": 4.0, "year": 2020}, {"source": "16", "target": "30", "source_name": "bob dylan", "target_name": "rock band", "weight": 2.0, "year": 2020}, {"source": "16", "target": "36", "source_name": "bob dylan", "target_name": "music industry", "weight": 3.0, "year": 2020}, {"source": "16", "target": "42", "source_name": "bob dylan", "target_name": "simon frith", "weight": 1.0, "year": 2020}, {"source": "16", "target": "44", "source_name": "bob dylan", "target_name": "alternative rock", "weight": 1.0, "year": 2020}, {"source": "16", "target": "48", "source_name": "bob dylan", "target_name": "pop music", "weight": 3.0, "year": 2020}, {"source": "16", "target": "52", "source_name": "bob dylan", "target_name": "folk song", "weight": 1.0, "year": 2020}, {"source": "16", "target": "53", "source_name": "bob dylan", "target_name": "popular music", "weight": 10.0, "year": 2020}, {"source": "16", "target": "54", "source_name": "bob dylan", "target_name": "american popular music", "weight": 1.0, "year": 2020}, {"source": "16", "target": "56", "source_name": "bob dylan", "target_name": "bruce springsteen", "weight": 1.0, "year": 2020}, {"source": "16", "target": "69", "source_name": "bob dylan", "target_name": "classical music", "weight": 1.0, "year": 2020}, {"source": "16", "target": "70", "source_name": "bob dylan", "target_name": "world war", "weight": 1.0, "year": 2020}, {"source": "16", "target": "72", "source_name": "bob dylan", "target_name": "jimi hendrix", "weight": 2.0, "year": 2020}, {"source": "16", "target": "75", "source_name": "bob dylan", "target_name": "world war ii", "weight": 1.0, "year": 2020}, {"source": "16", "target": "77", "source_name": "bob dylan", "target_name": "rock music", "weight": 7.0, "year": 2020}, {"source": "16", "target": "79", "source_name": "bob dylan", "target_name": "popular culture", "weight": 3.0, "year": 2020}, {"source": "16", "target": "80", "source_name": "bob dylan", "target_name": "folk music", "weight": 5.0, "year": 2020}, {"source": "17", "target": "21", "source_name": "civil rights", "target_name": "social protest", "weight": 1.0, "year": 2020}, {"source": "17", "target": "24", "source_name": "civil rights", "target_name": "punk rock", "weight": 1.0, "year": 2020}, {"source": "17", "target": "30", "source_name": "civil rights", "target_name": "rock band", "weight": 1.0, "year": 2020}, {"source": "17", "target": "41", "source_name": "civil rights", "target_name": "youth culture", "weight": 1.0, "year": 2020}, {"source": "17", "target": "53", "source_name": "civil rights", "target_name": "popular music", "weight": 4.0, "year": 2020}, {"source": "17", "target": "54", "source_name": "civil rights", "target_name": "american popular music", "weight": 1.0, "year": 2020}, {"source": "17", "target": "61", "source_name": "civil rights", "target_name": "progressive rock", "weight": 1.0, "year": 2020}, {"source": "17", "target": "70", "source_name": "civil rights", "target_name": "world war", "weight": 1.0, "year": 2020}, {"source": "17", "target": "73", "source_name": "civil rights", "target_name": "southern rock", "weight": 1.0, "year": 2020}, {"source": "17", "target": "74", "source_name": "civil rights", "target_name": "united states", "weight": 3.0, "year": 2020}, {"source": "17", "target": "75", "source_name": "civil rights", "target_name": "world war ii", "weight": 1.0, "year": 2020}, {"source": "17", "target": "77", "source_name": "civil rights", "target_name": "rock music", "weight": 3.0, "year": 2020}, {"source": "17", "target": "79", "source_name": "civil rights", "target_name": "popular culture", "weight": 1.0, "year": 2020}, {"source": "17", "target": "80", "source_name": "civil rights", "target_name": "folk music", "weight": 2.0, "year": 2020}, {"source": "18", "target": "19", "source_name": "middle class", "target_name": "music video", "weight": 1.0, "year": 2020}, {"source": "18", "target": "28", "source_name": "middle class", "target_name": "high school", "weight": 1.0, "year": 2020}, {"source": "18", "target": "30", "source_name": "middle class", "target_name": "rock band", "weight": 2.0, "year": 2020}, {"source": "18", "target": "48", "source_name": "middle class", "target_name": "pop music", "weight": 1.0, "year": 2020}, {"source": "18", "target": "53", "source_name": "middle class", "target_name": "popular music", "weight": 2.0, "year": 2020}, {"source": "18", "target": "58", "source_name": "middle class", "target_name": "music therapy", "weight": 1.0, "year": 2020}, {"source": "18", "target": "61", "source_name": "middle class", "target_name": "progressive rock", "weight": 2.0, "year": 2020}, {"source": "18", "target": "75", "source_name": "middle class", "target_name": "world war ii", "weight": 1.0, "year": 2020}, {"source": "18", "target": "77", "source_name": "middle class", "target_name": "rock music", "weight": 2.0, "year": 2020}, {"source": "19", "target": "22", "source_name": "music video", "target_name": "chamber music", "weight": 1.0, "year": 2020}, {"source": "19", "target": "24", "source_name": "music video", "target_name": "punk rock", "weight": 1.0, "year": 2020}, {"source": "19", "target": "28", "source_name": "music video", "target_name": "high school", "weight": 2.0, "year": 2020}, {"source": "19", "target": "30", "source_name": "music video", "target_name": "rock band", "weight": 4.0, "year": 2020}, {"source": "19", "target": "36", "source_name": "music video", "target_name": "music industry", "weight": 2.0, "year": 2020}, {"source": "19", "target": "38", "source_name": "music video", "target_name": "summary additional listening", "weight": 1.0, "year": 2020}, {"source": "19", "target": "40", "source_name": "music video", "target_name": "musical instruments", "weight": 1.0, "year": 2020}, {"source": "19", "target": "47", "source_name": "music video", "target_name": "hard rock", "weight": 1.0, "year": 2020}, {"source": "19", "target": "48", "source_name": "music video", "target_name": "pop music", "weight": 5.0, "year": 2020}, {"source": "19", "target": "49", "source_name": "music video", "target_name": "music theory", "weight": 1.0, "year": 2020}, {"source": "19", "target": "51", "source_name": "music video", "target_name": "cultural identity", "weight": 2.0, "year": 2020}, {"source": "19", "target": "52", "source_name": "music video", "target_name": "folk song", "weight": 1.0, "year": 2020}, {"source": "19", "target": "53", "source_name": "music video", "target_name": "popular music", "weight": 10.0, "year": 2020}, {"source": "19", "target": "54", "source_name": "music video", "target_name": "american popular music", "weight": 1.0, "year": 2020}, {"source": "19", "target": "56", "source_name": "music video", "target_name": "bruce springsteen", "weight": 1.0, "year": 2020}, {"source": "19", "target": "61", "source_name": "music video", "target_name": "progressive rock", "weight": 1.0, "year": 2020}, {"source": "19", "target": "65", "source_name": "music video", "target_name": "country music", "weight": 4.0, "year": 2020}, {"source": "19", "target": "67", "source_name": "music video", "target_name": "rock art", "weight": 1.0, "year": 2020}, {"source": "19", "target": "69", "source_name": "music video", "target_name": "classical music", "weight": 2.0, "year": 2020}, {"source": "19", "target": "72", "source_name": "music video", "target_name": "jimi hendrix", "weight": 1.0, "year": 2020}, {"source": "19", "target": "74", "source_name": "music video", "target_name": "united states", "weight": 3.0, "year": 2020}, {"source": "19", "target": "76", "source_name": "music video", "target_name": "los angeles", "weight": 1.0, "year": 2020}, {"source": "19", "target": "77", "source_name": "music video", "target_name": "rock music", "weight": 11.0, "year": 2020}, {"source": "19", "target": "78", "source_name": "music video", "target_name": "hip hop", "weight": 2.0, "year": 2020}, {"source": "19", "target": "79", "source_name": "music video", "target_name": "popular culture", "weight": 1.0, "year": 2020}, {"source": "19", "target": "80", "source_name": "music video", "target_name": "folk music", "weight": 1.0, "year": 2020}, {"source": "19", "target": "82", "source_name": "music video", "target_name": "heavy metal", "weight": 1.0, "year": 2020}, {"source": "19", "target": "89", "source_name": "music video", "target_name": "electronic music", "weight": 1.0, "year": 2020}, {"source": "19", "target": "90", "source_name": "music video", "target_name": "blues rock", "weight": 1.0, "year": 2020}, {"source": "20", "target": "24", "source_name": "garage rock", "target_name": "punk rock", "weight": 1.0, "year": 2020}, {"source": "20", "target": "27", "source_name": "garage rock", "target_name": "pop rock", "weight": 1.0, "year": 2020}, {"source": "20", "target": "29", "source_name": "garage rock", "target_name": "rolling stone", "weight": 1.0, "year": 2020}, {"source": "20", "target": "30", "source_name": "garage rock", "target_name": "rock band", "weight": 2.0, "year": 2020}, {"source": "20", "target": "43", "source_name": "garage rock", "target_name": "music education", "weight": 1.0, "year": 2020}, {"source": "20", "target": "44", "source_name": "garage rock", "target_name": "alternative rock", "weight": 2.0, "year": 2020}, {"source": "20", "target": "47", "source_name": "garage rock", "target_name": "hard rock", "weight": 1.0, "year": 2020}, {"source": "20", "target": "48", "source_name": "garage rock", "target_name": "pop music", "weight": 1.0, "year": 2020}, {"source": "20", "target": "53", "source_name": "garage rock", "target_name": "popular music", "weight": 5.0, "year": 2020}, {"source": "20", "target": "57", "source_name": "garage rock", "target_name": "north america", "weight": 1.0, "year": 2020}, {"source": "20", "target": "65", "source_name": "garage rock", "target_name": "country music", "weight": 1.0, "year": 2020}, {"source": "20", "target": "73", "source_name": "garage rock", "target_name": "southern rock", "weight": 1.0, "year": 2020}, {"source": "20", "target": "77", "source_name": "garage rock", "target_name": "rock music", "weight": 6.0, "year": 2020}, {"source": "20", "target": "80", "source_name": "garage rock", "target_name": "folk music", "weight": 1.0, "year": 2020}, {"source": "21", "target": "47", "source_name": "social protest", "target_name": "hard rock", "weight": 1.0, "year": 2020}, {"source": "21", "target": "48", "source_name": "social protest", "target_name": "pop music", "weight": 1.0, "year": 2020}, {"source": "21", "target": "53", "source_name": "social protest", "target_name": "popular music", "weight": 5.0, "year": 2020}, {"source": "21", "target": "57", "source_name": "social protest", "target_name": "north america", "weight": 2.0, "year": 2020}, {"source": "21", "target": "61", "source_name": "social protest", "target_name": "progressive rock", "weight": 1.0, "year": 2020}, {"source": "21", "target": "71", "source_name": "social protest", "target_name": "latin american", "weight": 1.0, "year": 2020}, {"source": "21", "target": "74", "source_name": "social protest", "target_name": "united states", "weight": 2.0, "year": 2020}, {"source": "21", "target": "77", "source_name": "social protest", "target_name": "rock music", "weight": 1.0, "year": 2020}, {"source": "21", "target": "80", "source_name": "social protest", "target_name": "folk music", "weight": 2.0, "year": 2020}, {"source": "21", "target": "82", "source_name": "social protest", "target_name": "heavy metal", "weight": 1.0, "year": 2020}, {"source": "21", "target": "87", "source_name": "social protest", "target_name": "music hall", "weight": 1.0, "year": 2020}, {"source": "22", "target": "35", "source_name": "chamber music", "target_name": "ancient greek", "weight": 1.0, "year": 2020}, {"source": "22", "target": "36", "source_name": "chamber music", "target_name": "music industry", "weight": 1.0, "year": 2020}, {"source": "22", "target": "38", "source_name": "chamber music", "target_name": "summary additional listening", "weight": 1.0, "year": 2020}, {"source": "22", "target": "40", "source_name": "chamber music", "target_name": "musical instruments", "weight": 1.0, "year": 2020}, {"source": "22", "target": "48", "source_name": "chamber music", "target_name": "pop music", "weight": 1.0, "year": 2020}, {"source": "22", "target": "52", "source_name": "chamber music", "target_name": "folk song", "weight": 1.0, "year": 2020}, {"source": "22", "target": "53", "source_name": "chamber music", "target_name": "popular music", "weight": 2.0, "year": 2020}, {"source": "22", "target": "54", "source_name": "chamber music", "target_name": "american popular music", "weight": 1.0, "year": 2020}, {"source": "22", "target": "65", "source_name": "chamber music", "target_name": "country music", "weight": 2.0, "year": 2020}, {"source": "22", "target": "69", "source_name": "chamber music", "target_name": "classical music", "weight": 4.0, "year": 2020}, {"source": "22", "target": "74", "source_name": "chamber music", "target_name": "united states", "weight": 1.0, "year": 2020}, {"source": "22", "target": "77", "source_name": "chamber music", "target_name": "rock music", "weight": 2.0, "year": 2020}, {"source": "22", "target": "79", "source_name": "chamber music", "target_name": "popular culture", "weight": 1.0, "year": 2020}, {"source": "22", "target": "80", "source_name": "chamber music", "target_name": "folk music", "weight": 2.0, "year": 2020}, {"source": "22", "target": "89", "source_name": "chamber music", "target_name": "electronic music", "weight": 3.0, "year": 2020}, {"source": "23", "target": "24", "source_name": "electronic dance music", "target_name": "punk rock", "weight": 1.0, "year": 2020}, {"source": "23", "target": "36", "source_name": "electronic dance music", "target_name": "music industry", "weight": 2.0, "year": 2020}, {"source": "23", "target": "42", "source_name": "electronic dance music", "target_name": "simon frith", "weight": 2.0, "year": 2020}, {"source": "23", "target": "47", "source_name": "electronic dance music", "target_name": "hard rock", "weight": 1.0, "year": 2020}, {"source": "23", "target": "53", "source_name": "electronic dance music", "target_name": "popular music", "weight": 10.0, "year": 2020}, {"source": "23", "target": "56", "source_name": "electronic dance music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2020}, {"source": "23", "target": "57", "source_name": "electronic dance music", "target_name": "north america", "weight": 1.0, "year": 2020}, {"source": "23", "target": "60", "source_name": "electronic dance music", "target_name": "cultural studies", "weight": 2.0, "year": 2020}, {"source": "23", "target": "67", "source_name": "electronic dance music", "target_name": "rock art", "weight": 1.0, "year": 2020}, {"source": "23", "target": "74", "source_name": "electronic dance music", "target_name": "united states", "weight": 2.0, "year": 2020}, {"source": "23", "target": "76", "source_name": "electronic dance music", "target_name": "los angeles", "weight": 1.0, "year": 2020}, {"source": "23", "target": "77", "source_name": "electronic dance music", "target_name": "rock music", "weight": 1.0, "year": 2020}, {"source": "23", "target": "78", "source_name": "electronic dance music", "target_name": "hip hop", "weight": 1.0, "year": 2020}, {"source": "23", "target": "79", "source_name": "electronic dance music", "target_name": "popular culture", "weight": 1.0, "year": 2020}, {"source": "23", "target": "82", "source_name": "electronic dance music", "target_name": "heavy metal", "weight": 3.0, "year": 2020}, {"source": "23", "target": "88", "source_name": "electronic dance music", "target_name": "oxford university press", "weight": 1.0, "year": 2020}, {"source": "23", "target": "89", "source_name": "electronic dance music", "target_name": "electronic music", "weight": 4.0, "year": 2020}, {"source": "24", "target": "27", "source_name": "punk rock", "target_name": "pop rock", "weight": 1.0, "year": 2020}, {"source": "24", "target": "30", "source_name": "punk rock", "target_name": "rock band", "weight": 1.0, "year": 2020}, {"source": "24", "target": "36", "source_name": "punk rock", "target_name": "music industry", "weight": 1.0, "year": 2020}, {"source": "24", "target": "41", "source_name": "punk rock", "target_name": "youth culture", "weight": 2.0, "year": 2020}, {"source": "24", "target": "42", "source_name": "punk rock", "target_name": "simon frith", "weight": 1.0, "year": 2020}, {"source": "24", "target": "44", "source_name": "punk rock", "target_name": "alternative rock", "weight": 4.0, "year": 2020}, {"source": "24", "target": "47", "source_name": "punk rock", "target_name": "hard rock", "weight": 5.0, "year": 2020}, {"source": "24", "target": "48", "source_name": "punk rock", "target_name": "pop music", "weight": 4.0, "year": 2020}, {"source": "24", "target": "51", "source_name": "punk rock", "target_name": "cultural identity", "weight": 1.0, "year": 2020}, {"source": "24", "target": "53", "source_name": "punk rock", "target_name": "popular music", "weight": 13.0, "year": 2020}, {"source": "24", "target": "57", "source_name": "punk rock", "target_name": "north america", "weight": 1.0, "year": 2020}, {"source": "24", "target": "61", "source_name": "punk rock", "target_name": "progressive rock", "weight": 3.0, "year": 2020}, {"source": "24", "target": "65", "source_name": "punk rock", "target_name": "country music", "weight": 1.0, "year": 2020}, {"source": "24", "target": "69", "source_name": "punk rock", "target_name": "classical music", "weight": 1.0, "year": 2020}, {"source": "24", "target": "74", "source_name": "punk rock", "target_name": "united states", "weight": 3.0, "year": 2020}, {"source": "24", "target": "77", "source_name": "punk rock", "target_name": "rock music", "weight": 12.0, "year": 2020}, {"source": "24", "target": "78", "source_name": "punk rock", "target_name": "hip hop", "weight": 1.0, "year": 2020}, {"source": "24", "target": "79", "source_name": "punk rock", "target_name": "popular culture", "weight": 1.0, "year": 2020}, {"source": "24", "target": "80", "source_name": "punk rock", "target_name": "folk music", "weight": 1.0, "year": 2020}, {"source": "24", "target": "82", "source_name": "punk rock", "target_name": "heavy metal", "weight": 6.0, "year": 2020}, {"source": "25", "target": "30", "source_name": "russian rock", "target_name": "rock band", "weight": 1.0, "year": 2020}, {"source": "25", "target": "37", "source_name": "russian rock", "target_name": "middle ages", "weight": 1.0, "year": 2020}, {"source": "25", "target": "46", "source_name": "russian rock", "target_name": "music festival", "weight": 1.0, "year": 2020}, {"source": "25", "target": "53", "source_name": "russian rock", "target_name": "popular music", "weight": 2.0, "year": 2020}, {"source": "25", "target": "66", "source_name": "russian rock", "target_name": "hong kong", "weight": 1.0, "year": 2020}, {"source": "25", "target": "77", "source_name": "russian rock", "target_name": "rock music", "weight": 6.0, "year": 2020}, {"source": "25", "target": "78", "source_name": "russian rock", "target_name": "hip hop", "weight": 1.0, "year": 2020}, {"source": "25", "target": "80", "source_name": "russian rock", "target_name": "folk music", "weight": 2.0, "year": 2020}, {"source": "25", "target": "82", "source_name": "russian rock", "target_name": "heavy metal", "weight": 1.0, "year": 2020}, {"source": "25", "target": "85", "source_name": "russian rock", "target_name": "jewish music", "weight": 1.0, "year": 2020}, {"source": "26", "target": "43", "source_name": "information technology", "target_name": "music education", "weight": 2.0, "year": 2020}, {"source": "26", "target": "57", "source_name": "information technology", "target_name": "north america", "weight": 1.0, "year": 2020}, {"source": "26", "target": "59", "source_name": "information technology", "target_name": "college students", "weight": 1.0, "year": 2020}, {"source": "26", "target": "89", "source_name": "information technology", "target_name": "electronic music", "weight": 1.0, "year": 2020}, {"source": "27", "target": "44", "source_name": "pop rock", "target_name": "alternative rock", "weight": 1.0, "year": 2020}, {"source": "27", "target": "47", "source_name": "pop rock", "target_name": "hard rock", "weight": 1.0, "year": 2020}, {"source": "27", "target": "48", "source_name": "pop rock", "target_name": "pop music", "weight": 1.0, "year": 2020}, {"source": "27", "target": "53", "source_name": "pop rock", "target_name": "popular music", "weight": 1.0, "year": 2020}, {"source": "27", "target": "64", "source_name": "pop rock", "target_name": "english language", "weight": 1.0, "year": 2020}, {"source": "27", "target": "65", "source_name": "pop rock", "target_name": "country music", "weight": 1.0, "year": 2020}, {"source": "27", "target": "66", "source_name": "pop rock", "target_name": "hong kong", "weight": 1.0, "year": 2020}, {"source": "27", "target": "67", "source_name": "pop rock", "target_name": "rock art", "weight": 1.0, "year": 2020}, {"source": "27", "target": "77", "source_name": "pop rock", "target_name": "rock music", "weight": 1.0, "year": 2020}, {"source": "27", "target": "83", "source_name": "pop rock", "target_name": "folk rock", "weight": 1.0, "year": 2020}, {"source": "28", "target": "30", "source_name": "high school", "target_name": "rock band", "weight": 1.0, "year": 2020}, {"source": "28", "target": "37", "source_name": "high school", "target_name": "middle ages", "weight": 1.0, "year": 2020}, {"source": "28", "target": "43", "source_name": "high school", "target_name": "music education", "weight": 1.0, "year": 2020}, {"source": "28", "target": "48", "source_name": "high school", "target_name": "pop music", "weight": 3.0, "year": 2020}, {"source": "28", "target": "53", "source_name": "high school", "target_name": "popular music", "weight": 1.0, "year": 2020}, {"source": "28", "target": "58", "source_name": "high school", "target_name": "music therapy", "weight": 1.0, "year": 2020}, {"source": "28", "target": "61", "source_name": "high school", "target_name": "progressive rock", "weight": 1.0, "year": 2020}, {"source": "28", "target": "69", "source_name": "high school", "target_name": "classical music", "weight": 1.0, "year": 2020}, {"source": "28", "target": "74", "source_name": "high school", "target_name": "united states", "weight": 1.0, "year": 2020}, {"source": "28", "target": "77", "source_name": "high school", "target_name": "rock music", "weight": 6.0, "year": 2020}, {"source": "28", "target": "82", "source_name": "high school", "target_name": "heavy metal", "weight": 1.0, "year": 2020}, {"source": "29", "target": "30", "source_name": "rolling stone", "target_name": "rock band", "weight": 1.0, "year": 2020}, {"source": "29", "target": "36", "source_name": "rolling stone", "target_name": "music industry", "weight": 2.0, "year": 2020}, {"source": "29", "target": "42", "source_name": "rolling stone", "target_name": "simon frith", "weight": 1.0, "year": 2020}, {"source": "29", "target": "44", "source_name": "rolling stone", "target_name": "alternative rock", "weight": 1.0, "year": 2020}, {"source": "29", "target": "48", "source_name": "rolling stone", "target_name": "pop music", "weight": 4.0, "year": 2020}, {"source": "29", "target": "53", "source_name": "rolling stone", "target_name": "popular music", "weight": 10.0, "year": 2020}, {"source": "29", "target": "54", "source_name": "rolling stone", "target_name": "american popular music", "weight": 2.0, "year": 2020}, {"source": "29", "target": "55", "source_name": "rolling stone", "target_name": "rock criticism", "weight": 4.0, "year": 2020}, {"source": "29", "target": "56", "source_name": "rolling stone", "target_name": "bruce springsteen", "weight": 2.0, "year": 2020}, {"source": "29", "target": "62", "source_name": "rolling stone", "target_name": "led zeppelin", "weight": 2.0, "year": 2020}, {"source": "29", "target": "69", "source_name": "rolling stone", "target_name": "classical music", "weight": 1.0, "year": 2020}, {"source": "29", "target": "72", "source_name": "rolling stone", "target_name": "jimi hendrix", "weight": 3.0, "year": 2020}, {"source": "29", "target": "74", "source_name": "rolling stone", "target_name": "united states", "weight": 2.0, "year": 2020}, {"source": "29", "target": "77", "source_name": "rolling stone", "target_name": "rock music", "weight": 9.0, "year": 2020}, {"source": "29", "target": "79", "source_name": "rolling stone", "target_name": "popular culture", "weight": 3.0, "year": 2020}, {"source": "29", "target": "80", "source_name": "rolling stone", "target_name": "folk music", "weight": 1.0, "year": 2020}, {"source": "29", "target": "87", "source_name": "rolling stone", "target_name": "music hall", "weight": 2.0, "year": 2020}, {"source": "30", "target": "36", "source_name": "rock band", "target_name": "music industry", "weight": 5.0, "year": 2020}, {"source": "30", "target": "37", "source_name": "rock band", "target_name": "middle ages", "weight": 2.0, "year": 2020}, {"source": "30", "target": "40", "source_name": "rock band", "target_name": "musical instruments", "weight": 1.0, "year": 2020}, {"source": "30", "target": "41", "source_name": "rock band", "target_name": "youth culture", "weight": 1.0, "year": 2020}, {"source": "30", "target": "43", "source_name": "rock band", "target_name": "music education", "weight": 6.0, "year": 2020}, {"source": "30", "target": "44", "source_name": "rock band", "target_name": "alternative rock", "weight": 1.0, "year": 2020}, {"source": "30", "target": "47", "source_name": "rock band", "target_name": "hard rock", "weight": 1.0, "year": 2020}, {"source": "30", "target": "48", "source_name": "rock band", "target_name": "pop music", "weight": 3.0, "year": 2020}, {"source": "30", "target": "52", "source_name": "rock band", "target_name": "folk song", "weight": 2.0, "year": 2020}, {"source": "30", "target": "53", "source_name": "rock band", "target_name": "popular music", "weight": 25.0, "year": 2020}, {"source": "30", "target": "54", "source_name": "rock band", "target_name": "american popular music", "weight": 1.0, "year": 2020}, {"source": "30", "target": "55", "source_name": "rock band", "target_name": "rock criticism", "weight": 1.0, "year": 2020}, {"source": "30", "target": "61", "source_name": "rock band", "target_name": "progressive rock", "weight": 11.0, "year": 2020}, {"source": "30", "target": "62", "source_name": "rock band", "target_name": "led zeppelin", "weight": 1.0, "year": 2020}, {"source": "30", "target": "63", "source_name": "rock band", "target_name": "post rock", "weight": 1.0, "year": 2020}, {"source": "30", "target": "65", "source_name": "rock band", "target_name": "country music", "weight": 1.0, "year": 2020}, {"source": "30", "target": "67", "source_name": "rock band", "target_name": "rock art", "weight": 1.0, "year": 2020}, {"source": "30", "target": "69", "source_name": "rock band", "target_name": "classical music", "weight": 5.0, "year": 2020}, {"source": "30", "target": "72", "source_name": "rock band", "target_name": "jimi hendrix", "weight": 2.0, "year": 2020}, {"source": "30", "target": "73", "source_name": "rock band", "target_name": "southern rock", "weight": 2.0, "year": 2020}, {"source": "30", "target": "74", "source_name": "rock band", "target_name": "united states", "weight": 2.0, "year": 2020}, {"source": "30", "target": "76", "source_name": "rock band", "target_name": "los angeles", "weight": 1.0, "year": 2020}, {"source": "30", "target": "77", "source_name": "rock band", "target_name": "rock music", "weight": 41.0, "year": 2020}, {"source": "30", "target": "79", "source_name": "rock band", "target_name": "popular culture", "weight": 2.0, "year": 2020}, {"source": "30", "target": "80", "source_name": "rock band", "target_name": "folk music", "weight": 3.0, "year": 2020}, {"source": "30", "target": "82", "source_name": "rock band", "target_name": "heavy metal", "weight": 4.0, "year": 2020}, {"source": "30", "target": "83", "source_name": "rock band", "target_name": "folk rock", "weight": 1.0, "year": 2020}, {"source": "30", "target": "87", "source_name": "rock band", "target_name": "music hall", "weight": 1.0, "year": 2020}, {"source": "30", "target": "89", "source_name": "rock band", "target_name": "electronic music", "weight": 1.0, "year": 2020}, {"source": "31", "target": "69", "source_name": "post modernism", "target_name": "classical music", "weight": 1.0, "year": 2020}, {"source": "32", "target": "36", "source_name": "higher education", "target_name": "music industry", "weight": 1.0, "year": 2020}, {"source": "32", "target": "43", "source_name": "higher education", "target_name": "music education", "weight": 5.0, "year": 2020}, {"source": "32", "target": "53", "source_name": "higher education", "target_name": "popular music", "weight": 2.0, "year": 2020}, {"source": "32", "target": "60", "source_name": "higher education", "target_name": "cultural studies", "weight": 1.0, "year": 2020}, {"source": "32", "target": "69", "source_name": "higher education", "target_name": "classical music", "weight": 1.0, "year": 2020}, {"source": "33", "target": "53", "source_name": "jesus christ", "target_name": "popular music", "weight": 1.0, "year": 2020}, {"source": "33", "target": "70", "source_name": "jesus christ", "target_name": "world war", "weight": 1.0, "year": 2020}, {"source": "33", "target": "77", "source_name": "jesus christ", "target_name": "rock music", "weight": 4.0, "year": 2020}, {"source": "34", "target": "36", "source_name": "mass media", "target_name": "music industry", "weight": 1.0, "year": 2020}, {"source": "34", "target": "40", "source_name": "mass media", "target_name": "musical instruments", "weight": 1.0, "year": 2020}, {"source": "34", "target": "41", "source_name": "mass media", "target_name": "youth culture", "weight": 1.0, "year": 2020}, {"source": "34", "target": "43", "source_name": "mass media", "target_name": "music education", "weight": 3.0, "year": 2020}, {"source": "34", "target": "46", "source_name": "mass media", "target_name": "music festival", "weight": 1.0, "year": 2020}, {"source": "34", "target": "48", "source_name": "mass media", "target_name": "pop music", "weight": 2.0, "year": 2020}, {"source": "34", "target": "51", "source_name": "mass media", "target_name": "cultural identity", "weight": 1.0, "year": 2020}, {"source": "34", "target": "52", "source_name": "mass media", "target_name": "folk song", "weight": 2.0, "year": 2020}, {"source": "34", "target": "53", "source_name": "mass media", "target_name": "popular music", "weight": 6.0, "year": 2020}, {"source": "34", "target": "60", "source_name": "mass media", "target_name": "cultural studies", "weight": 1.0, "year": 2020}, {"source": "34", "target": "65", "source_name": "mass media", "target_name": "country music", "weight": 1.0, "year": 2020}, {"source": "34", "target": "66", "source_name": "mass media", "target_name": "hong kong", "weight": 1.0, "year": 2020}, {"source": "34", "target": "67", "source_name": "mass media", "target_name": "rock art", "weight": 1.0, "year": 2020}, {"source": "34", "target": "69", "source_name": "mass media", "target_name": "classical music", "weight": 2.0, "year": 2020}, {"source": "34", "target": "77", "source_name": "mass media", "target_name": "rock music", "weight": 4.0, "year": 2020}, {"source": "34", "target": "79", "source_name": "mass media", "target_name": "popular culture", "weight": 2.0, "year": 2020}, {"source": "35", "target": "43", "source_name": "ancient greek", "target_name": "music education", "weight": 1.0, "year": 2020}, {"source": "35", "target": "65", "source_name": "ancient greek", "target_name": "country music", "weight": 1.0, "year": 2020}, {"source": "35", "target": "77", "source_name": "ancient greek", "target_name": "rock music", "weight": 1.0, "year": 2020}, {"source": "35", "target": "80", "source_name": "ancient greek", "target_name": "folk music", "weight": 1.0, "year": 2020}, {"source": "35", "target": "89", "source_name": "ancient greek", "target_name": "electronic music", "weight": 1.0, "year": 2020}, {"source": "36", "target": "38", "source_name": "music industry", "target_name": "summary additional listening", "weight": 1.0, "year": 2020}, {"source": "36", "target": "40", "source_name": "music industry", "target_name": "musical instruments", "weight": 2.0, "year": 2020}, {"source": "36", "target": "41", "source_name": "music industry", "target_name": "youth culture", "weight": 3.0, "year": 2020}, {"source": "36", "target": "42", "source_name": "music industry", "target_name": "simon frith", "weight": 2.0, "year": 2020}, {"source": "36", "target": "43", "source_name": "music industry", "target_name": "music education", "weight": 5.0, "year": 2020}, {"source": "36", "target": "44", "source_name": "music industry", "target_name": "alternative rock", "weight": 1.0, "year": 2020}, {"source": "36", "target": "46", "source_name": "music industry", "target_name": "music festival", "weight": 1.0, "year": 2020}, {"source": "36", "target": "47", "source_name": "music industry", "target_name": "hard rock", "weight": 3.0, "year": 2020}, {"source": "36", "target": "48", "source_name": "music industry", "target_name": "pop music", "weight": 11.0, "year": 2020}, {"source": "36", "target": "49", "source_name": "music industry", "target_name": "music theory", "weight": 1.0, "year": 2020}, {"source": "36", "target": "50", "source_name": "music industry", "target_name": "hollywood film", "weight": 1.0, "year": 2020}, {"source": "36", "target": "51", "source_name": "music industry", "target_name": "cultural identity", "weight": 3.0, "year": 2020}, {"source": "36", "target": "52", "source_name": "music industry", "target_name": "folk song", "weight": 1.0, "year": 2020}, {"source": "36", "target": "53", "source_name": "music industry", "target_name": "popular music", "weight": 39.0, "year": 2020}, {"source": "36", "target": "54", "source_name": "music industry", "target_name": "american popular music", "weight": 3.0, "year": 2020}, {"source": "36", "target": "55", "source_name": "music industry", "target_name": "rock criticism", "weight": 3.0, "year": 2020}, {"source": "36", "target": "56", "source_name": "music industry", "target_name": "bruce springsteen", "weight": 2.0, "year": 2020}, {"source": "36", "target": "60", "source_name": "music industry", "target_name": "cultural studies", "weight": 2.0, "year": 2020}, {"source": "36", "target": "61", "source_name": "music industry", "target_name": "progressive rock", "weight": 3.0, "year": 2020}, {"source": "36", "target": "62", "source_name": "music industry", "target_name": "led zeppelin", "weight": 1.0, "year": 2020}, {"source": "36", "target": "64", "source_name": "music industry", "target_name": "english language", "weight": 1.0, "year": 2020}, {"source": "36", "target": "65", "source_name": "music industry", "target_name": "country music", "weight": 2.0, "year": 2020}, {"source": "36", "target": "66", "source_name": "music industry", "target_name": "hong kong", "weight": 1.0, "year": 2020}, {"source": "36", "target": "67", "source_name": "music industry", "target_name": "rock art", "weight": 1.0, "year": 2020}, {"source": "36", "target": "68", "source_name": "music industry", "target_name": "hearing loss", "weight": 1.0, "year": 2020}, {"source": "36", "target": "69", "source_name": "music industry", "target_name": "classical music", "weight": 7.0, "year": 2020}, {"source": "36", "target": "70", "source_name": "music industry", "target_name": "world war", "weight": 2.0, "year": 2020}, {"source": "36", "target": "72", "source_name": "music industry", "target_name": "jimi hendrix", "weight": 4.0, "year": 2020}, {"source": "36", "target": "74", "source_name": "music industry", "target_name": "united states", "weight": 6.0, "year": 2020}, {"source": "36", "target": "75", "source_name": "music industry", "target_name": "world war ii", "weight": 3.0, "year": 2020}, {"source": "36", "target": "76", "source_name": "music industry", "target_name": "los angeles", "weight": 2.0, "year": 2020}, {"source": "36", "target": "77", "source_name": "music industry", "target_name": "rock music", "weight": 26.0, "year": 2020}, {"source": "36", "target": "78", "source_name": "music industry", "target_name": "hip hop", "weight": 6.0, "year": 2020}, {"source": "36", "target": "79", "source_name": "music industry", "target_name": "popular culture", "weight": 6.0, "year": 2020}, {"source": "36", "target": "80", "source_name": "music industry", "target_name": "folk music", "weight": 6.0, "year": 2020}, {"source": "36", "target": "82", "source_name": "music industry", "target_name": "heavy metal", "weight": 2.0, "year": 2020}, {"source": "36", "target": "83", "source_name": "music industry", "target_name": "folk rock", "weight": 1.0, "year": 2020}, {"source": "36", "target": "84", "source_name": "music industry", "target_name": "artificial intelligence", "weight": 1.0, "year": 2020}, {"source": "36", "target": "86", "source_name": "music industry", "target_name": "south korea", "weight": 1.0, "year": 2020}, {"source": "36", "target": "87", "source_name": "music industry", "target_name": "music hall", "weight": 1.0, "year": 2020}, {"source": "36", "target": "88", "source_name": "music industry", "target_name": "oxford university press", "weight": 2.0, "year": 2020}, {"source": "36", "target": "89", "source_name": "music industry", "target_name": "electronic music", "weight": 5.0, "year": 2020}, {"source": "37", "target": "44", "source_name": "middle ages", "target_name": "alternative rock", "weight": 1.0, "year": 2020}, {"source": "37", "target": "58", "source_name": "middle ages", "target_name": "music therapy", "weight": 1.0, "year": 2020}, {"source": "37", "target": "61", "source_name": "middle ages", "target_name": "progressive rock", "weight": 1.0, "year": 2020}, {"source": "37", "target": "69", "source_name": "middle ages", "target_name": "classical music", "weight": 1.0, "year": 2020}, {"source": "37", "target": "77", "source_name": "middle ages", "target_name": "rock music", "weight": 3.0, "year": 2020}, {"source": "37", "target": "80", "source_name": "middle ages", "target_name": "folk music", "weight": 2.0, "year": 2020}, {"source": "38", "target": "40", "source_name": "summary additional listening", "target_name": "musical instruments", "weight": 1.0, "year": 2020}, {"source": "38", "target": "52", "source_name": "summary additional listening", "target_name": "folk song", "weight": 1.0, "year": 2020}, {"source": "38", "target": "53", "source_name": "summary additional listening", "target_name": "popular music", "weight": 1.0, "year": 2020}, {"source": "38", "target": "54", "source_name": "summary additional listening", "target_name": "american popular music", "weight": 1.0, "year": 2020}, {"source": "38", "target": "65", "source_name": "summary additional listening", "target_name": "country music", "weight": 1.0, "year": 2020}, {"source": "38", "target": "69", "source_name": "summary additional listening", "target_name": "classical music", "weight": 1.0, "year": 2020}, {"source": "38", "target": "74", "source_name": "summary additional listening", "target_name": "united states", "weight": 1.0, "year": 2020}, {"source": "38", "target": "80", "source_name": "summary additional listening", "target_name": "folk music", "weight": 1.0, "year": 2020}, {"source": "38", "target": "89", "source_name": "summary additional listening", "target_name": "electronic music", "weight": 1.0, "year": 2020}, {"source": "40", "target": "43", "source_name": "musical instruments", "target_name": "music education", "weight": 2.0, "year": 2020}, {"source": "40", "target": "48", "source_name": "musical instruments", "target_name": "pop music", "weight": 1.0, "year": 2020}, {"source": "40", "target": "49", "source_name": "musical instruments", "target_name": "music theory", "weight": 1.0, "year": 2020}, {"source": "40", "target": "52", "source_name": "musical instruments", "target_name": "folk song", "weight": 1.0, "year": 2020}, {"source": "40", "target": "53", "source_name": "musical instruments", "target_name": "popular music", "weight": 2.0, "year": 2020}, {"source": "40", "target": "54", "source_name": "musical instruments", "target_name": "american popular music", "weight": 2.0, "year": 2020}, {"source": "40", "target": "65", "source_name": "musical instruments", "target_name": "country music", "weight": 1.0, "year": 2020}, {"source": "40", "target": "69", "source_name": "musical instruments", "target_name": "classical music", "weight": 1.0, "year": 2020}, {"source": "40", "target": "70", "source_name": "musical instruments", "target_name": "world war", "weight": 1.0, "year": 2020}, {"source": "40", "target": "74", "source_name": "musical instruments", "target_name": "united states", "weight": 2.0, "year": 2020}, {"source": "40", "target": "75", "source_name": "musical instruments", "target_name": "world war ii", "weight": 1.0, "year": 2020}, {"source": "40", "target": "77", "source_name": "musical instruments", "target_name": "rock music", "weight": 1.0, "year": 2020}, {"source": "40", "target": "80", "source_name": "musical instruments", "target_name": "folk music", "weight": 1.0, "year": 2020}, {"source": "40", "target": "86", "source_name": "musical instruments", "target_name": "south korea", "weight": 1.0, "year": 2020}, {"source": "40", "target": "89", "source_name": "musical instruments", "target_name": "electronic music", "weight": 3.0, "year": 2020}, {"source": "41", "target": "42", "source_name": "youth culture", "target_name": "simon frith", "weight": 2.0, "year": 2020}, {"source": "41", "target": "46", "source_name": "youth culture", "target_name": "music festival", "weight": 1.0, "year": 2020}, {"source": "41", "target": "47", "source_name": "youth culture", "target_name": "hard rock", "weight": 1.0, "year": 2020}, {"source": "41", "target": "48", "source_name": "youth culture", "target_name": "pop music", "weight": 5.0, "year": 2020}, {"source": "41", "target": "51", "source_name": "youth culture", "target_name": "cultural identity", "weight": 2.0, "year": 2020}, {"source": "41", "target": "53", "source_name": "youth culture", "target_name": "popular music", "weight": 10.0, "year": 2020}, {"source": "41", "target": "57", "source_name": "youth culture", "target_name": "north america", "weight": 1.0, "year": 2020}, {"source": "41", "target": "60", "source_name": "youth culture", "target_name": "cultural studies", "weight": 3.0, "year": 2020}, {"source": "41", "target": "61", "source_name": "youth culture", "target_name": "progressive rock", "weight": 1.0, "year": 2020}, {"source": "41", "target": "66", "source_name": "youth culture", "target_name": "hong kong", "weight": 1.0, "year": 2020}, {"source": "41", "target": "74", "source_name": "youth culture", "target_name": "united states", "weight": 2.0, "year": 2020}, {"source": "41", "target": "75", "source_name": "youth culture", "target_name": "world war ii", "weight": 1.0, "year": 2020}, {"source": "41", "target": "77", "source_name": "youth culture", "target_name": "rock music", "weight": 14.0, "year": 2020}, {"source": "41", "target": "80", "source_name": "youth culture", "target_name": "folk music", "weight": 2.0, "year": 2020}, {"source": "42", "target": "47", "source_name": "simon frith", "target_name": "hard rock", "weight": 1.0, "year": 2020}, {"source": "42", "target": "48", "source_name": "simon frith", "target_name": "pop music", "weight": 6.0, "year": 2020}, {"source": "42", "target": "49", "source_name": "simon frith", "target_name": "music theory", "weight": 1.0, "year": 2020}, {"source": "42", "target": "51", "source_name": "simon frith", "target_name": "cultural identity", "weight": 1.0, "year": 2020}, {"source": "42", "target": "53", "source_name": "simon frith", "target_name": "popular music", "weight": 8.0, "year": 2020}, {"source": "42", "target": "55", "source_name": "simon frith", "target_name": "rock criticism", "weight": 2.0, "year": 2020}, {"source": "42", "target": "56", "source_name": "simon frith", "target_name": "bruce springsteen", "weight": 1.0, "year": 2020}, {"source": "42", "target": "57", "source_name": "simon frith", "target_name": "north america", "weight": 1.0, "year": 2020}, {"source": "42", "target": "60", "source_name": "simon frith", "target_name": "cultural studies", "weight": 4.0, "year": 2020}, {"source": "42", "target": "61", "source_name": "simon frith", "target_name": "progressive rock", "weight": 1.0, "year": 2020}, {"source": "42", "target": "65", "source_name": "simon frith", "target_name": "country music", "weight": 1.0, "year": 2020}, {"source": "42", "target": "72", "source_name": "simon frith", "target_name": "jimi hendrix", "weight": 1.0, "year": 2020}, {"source": "42", "target": "76", "source_name": "simon frith", "target_name": "los angeles", "weight": 1.0, "year": 2020}, {"source": "42", "target": "77", "source_name": "simon frith", "target_name": "rock music", "weight": 6.0, "year": 2020}, {"source": "42", "target": "78", "source_name": "simon frith", "target_name": "hip hop", "weight": 1.0, "year": 2020}, {"source": "42", "target": "79", "source_name": "simon frith", "target_name": "popular culture", "weight": 2.0, "year": 2020}, {"source": "42", "target": "82", "source_name": "simon frith", "target_name": "heavy metal", "weight": 1.0, "year": 2020}, {"source": "42", "target": "88", "source_name": "simon frith", "target_name": "oxford university press", "weight": 1.0, "year": 2020}, {"source": "43", "target": "48", "source_name": "music education", "target_name": "pop music", "weight": 2.0, "year": 2020}, {"source": "43", "target": "49", "source_name": "music education", "target_name": "music theory", "weight": 3.0, "year": 2020}, {"source": "43", "target": "51", "source_name": "music education", "target_name": "cultural identity", "weight": 1.0, "year": 2020}, {"source": "43", "target": "52", "source_name": "music education", "target_name": "folk song", "weight": 1.0, "year": 2020}, {"source": "43", "target": "53", "source_name": "music education", "target_name": "popular music", "weight": 8.0, "year": 2020}, {"source": "43", "target": "57", "source_name": "music education", "target_name": "north america", "weight": 1.0, "year": 2020}, {"source": "43", "target": "59", "source_name": "music education", "target_name": "college students", "weight": 1.0, "year": 2020}, {"source": "43", "target": "60", "source_name": "music education", "target_name": "cultural studies", "weight": 3.0, "year": 2020}, {"source": "43", "target": "66", "source_name": "music education", "target_name": "hong kong", "weight": 1.0, "year": 2020}, {"source": "43", "target": "69", "source_name": "music education", "target_name": "classical music", "weight": 5.0, "year": 2020}, {"source": "43", "target": "74", "source_name": "music education", "target_name": "united states", "weight": 1.0, "year": 2020}, {"source": "43", "target": "77", "source_name": "music education", "target_name": "rock music", "weight": 6.0, "year": 2020}, {"source": "43", "target": "79", "source_name": "music education", "target_name": "popular culture", "weight": 1.0, "year": 2020}, {"source": "43", "target": "80", "source_name": "music education", "target_name": "folk music", "weight": 6.0, "year": 2020}, {"source": "43", "target": "82", "source_name": "music education", "target_name": "heavy metal", "weight": 1.0, "year": 2020}, {"source": "43", "target": "86", "source_name": "music education", "target_name": "south korea", "weight": 1.0, "year": 2020}, {"source": "44", "target": "46", "source_name": "alternative rock", "target_name": "music festival", "weight": 1.0, "year": 2020}, {"source": "44", "target": "47", "source_name": "alternative rock", "target_name": "hard rock", "weight": 3.0, "year": 2020}, {"source": "44", "target": "48", "source_name": "alternative rock", "target_name": "pop music", "weight": 1.0, "year": 2020}, {"source": "44", "target": "51", "source_name": "alternative rock", "target_name": "cultural identity", "weight": 1.0, "year": 2020}, {"source": "44", "target": "53", "source_name": "alternative rock", "target_name": "popular music", "weight": 11.0, "year": 2020}, {"source": "44", "target": "57", "source_name": "alternative rock", "target_name": "north america", "weight": 3.0, "year": 2020}, {"source": "44", "target": "61", "source_name": "alternative rock", "target_name": "progressive rock", "weight": 1.0, "year": 2020}, {"source": "44", "target": "65", "source_name": "alternative rock", "target_name": "country music", "weight": 3.0, "year": 2020}, {"source": "44", "target": "67", "source_name": "alternative rock", "target_name": "rock art", "weight": 1.0, "year": 2020}, {"source": "44", "target": "73", "source_name": "alternative rock", "target_name": "southern rock", "weight": 1.0, "year": 2020}, {"source": "44", "target": "74", "source_name": "alternative rock", "target_name": "united states", "weight": 2.0, "year": 2020}, {"source": "44", "target": "77", "source_name": "alternative rock", "target_name": "rock music", "weight": 8.0, "year": 2020}, {"source": "44", "target": "78", "source_name": "alternative rock", "target_name": "hip hop", "weight": 1.0, "year": 2020}, {"source": "44", "target": "79", "source_name": "alternative rock", "target_name": "popular culture", "weight": 1.0, "year": 2020}, {"source": "44", "target": "80", "source_name": "alternative rock", "target_name": "folk music", "weight": 1.0, "year": 2020}, {"source": "44", "target": "82", "source_name": "alternative rock", "target_name": "heavy metal", "weight": 2.0, "year": 2020}, {"source": "45", "target": "77", "source_name": "double bass", "target_name": "rock music", "weight": 2.0, "year": 2020}, {"source": "46", "target": "47", "source_name": "music festival", "target_name": "hard rock", "weight": 1.0, "year": 2020}, {"source": "46", "target": "48", "source_name": "music festival", "target_name": "pop music", "weight": 2.0, "year": 2020}, {"source": "46", "target": "53", "source_name": "music festival", "target_name": "popular music", "weight": 2.0, "year": 2020}, {"source": "46", "target": "61", "source_name": "music festival", "target_name": "progressive rock", "weight": 1.0, "year": 2020}, {"source": "46", "target": "65", "source_name": "music festival", "target_name": "country music", "weight": 1.0, "year": 2020}, {"source": "46", "target": "66", "source_name": "music festival", "target_name": "hong kong", "weight": 1.0, "year": 2020}, {"source": "46", "target": "69", "source_name": "music festival", "target_name": "classical music", "weight": 3.0, "year": 2020}, {"source": "46", "target": "77", "source_name": "music festival", "target_name": "rock music", "weight": 8.0, "year": 2020}, {"source": "46", "target": "78", "source_name": "music festival", "target_name": "hip hop", "weight": 1.0, "year": 2020}, {"source": "46", "target": "80", "source_name": "music festival", "target_name": "folk music", "weight": 2.0, "year": 2020}, {"source": "46", "target": "82", "source_name": "music festival", "target_name": "heavy metal", "weight": 1.0, "year": 2020}, {"source": "46", "target": "85", "source_name": "music festival", "target_name": "jewish music", "weight": 1.0, "year": 2020}, {"source": "46", "target": "86", "source_name": "music festival", "target_name": "south korea", "weight": 2.0, "year": 2020}, {"source": "47", "target": "48", "source_name": "hard rock", "target_name": "pop music", "weight": 2.0, "year": 2020}, {"source": "47", "target": "51", "source_name": "hard rock", "target_name": "cultural identity", "weight": 1.0, "year": 2020}, {"source": "47", "target": "53", "source_name": "hard rock", "target_name": "popular music", "weight": 5.0, "year": 2020}, {"source": "47", "target": "56", "source_name": "hard rock", "target_name": "bruce springsteen", "weight": 1.0, "year": 2020}, {"source": "47", "target": "57", "source_name": "hard rock", "target_name": "north america", "weight": 1.0, "year": 2020}, {"source": "47", "target": "59", "source_name": "hard rock", "target_name": "college students", "weight": 1.0, "year": 2020}, {"source": "47", "target": "61", "source_name": "hard rock", "target_name": "progressive rock", "weight": 3.0, "year": 2020}, {"source": "47", "target": "65", "source_name": "hard rock", "target_name": "country music", "weight": 2.0, "year": 2020}, {"source": "47", "target": "67", "source_name": "hard rock", "target_name": "rock art", "weight": 1.0, "year": 2020}, {"source": "47", "target": "69", "source_name": "hard rock", "target_name": "classical music", "weight": 2.0, "year": 2020}, {"source": "47", "target": "74", "source_name": "hard rock", "target_name": "united states", "weight": 1.0, "year": 2020}, {"source": "47", "target": "77", "source_name": "hard rock", "target_name": "rock music", "weight": 15.0, "year": 2020}, {"source": "47", "target": "78", "source_name": "hard rock", "target_name": "hip hop", "weight": 1.0, "year": 2020}, {"source": "47", "target": "79", "source_name": "hard rock", "target_name": "popular culture", "weight": 2.0, "year": 2020}, {"source": "47", "target": "82", "source_name": "hard rock", "target_name": "heavy metal", "weight": 10.0, "year": 2020}, {"source": "47", "target": "83", "source_name": "hard rock", "target_name": "folk rock", "weight": 1.0, "year": 2020}, {"source": "47", "target": "89", "source_name": "hard rock", "target_name": "electronic music", "weight": 1.0, "year": 2020}, {"source": "48", "target": "49", "source_name": "pop music", "target_name": "music theory", "weight": 1.0, "year": 2020}, {"source": "48", "target": "51", "source_name": "pop music", "target_name": "cultural identity", "weight": 3.0, "year": 2020}, {"source": "48", "target": "52", "source_name": "pop music", "target_name": "folk song", "weight": 3.0, "year": 2020}, {"source": "48", "target": "53", "source_name": "pop music", "target_name": "popular music", "weight": 48.0, "year": 2020}, {"source": "48", "target": "55", "source_name": "pop music", "target_name": "rock criticism", "weight": 2.0, "year": 2020}, {"source": "48", "target": "57", "source_name": "pop music", "target_name": "north america", "weight": 3.0, "year": 2020}, {"source": "48", "target": "58", "source_name": "pop music", "target_name": "music therapy", "weight": 1.0, "year": 2020}, {"source": "48", "target": "59", "source_name": "pop music", "target_name": "college students", "weight": 3.0, "year": 2020}, {"source": "48", "target": "60", "source_name": "pop music", "target_name": "cultural studies", "weight": 1.0, "year": 2020}, {"source": "48", "target": "62", "source_name": "pop music", "target_name": "led zeppelin", "weight": 2.0, "year": 2020}, {"source": "48", "target": "64", "source_name": "pop music", "target_name": "english language", "weight": 2.0, "year": 2020}, {"source": "48", "target": "65", "source_name": "pop music", "target_name": "country music", "weight": 2.0, "year": 2020}, {"source": "48", "target": "66", "source_name": "pop music", "target_name": "hong kong", "weight": 4.0, "year": 2020}, {"source": "48", "target": "67", "source_name": "pop music", "target_name": "rock art", "weight": 3.0, "year": 2020}, {"source": "48", "target": "69", "source_name": "pop music", "target_name": "classical music", "weight": 10.0, "year": 2020}, {"source": "48", "target": "70", "source_name": "pop music", "target_name": "world war", "weight": 2.0, "year": 2020}, {"source": "48", "target": "71", "source_name": "pop music", "target_name": "latin american", "weight": 1.0, "year": 2020}, {"source": "48", "target": "72", "source_name": "pop music", "target_name": "jimi hendrix", "weight": 3.0, "year": 2020}, {"source": "48", "target": "74", "source_name": "pop music", "target_name": "united states", "weight": 7.0, "year": 2020}, {"source": "48", "target": "76", "source_name": "pop music", "target_name": "los angeles", "weight": 1.0, "year": 2020}, {"source": "48", "target": "77", "source_name": "pop music", "target_name": "rock music", "weight": 44.0, "year": 2020}, {"source": "48", "target": "78", "source_name": "pop music", "target_name": "hip hop", "weight": 4.0, "year": 2020}, {"source": "48", "target": "79", "source_name": "pop music", "target_name": "popular culture", "weight": 6.0, "year": 2020}, {"source": "48", "target": "80", "source_name": "pop music", "target_name": "folk music", "weight": 8.0, "year": 2020}, {"source": "48", "target": "82", "source_name": "pop music", "target_name": "heavy metal", "weight": 2.0, "year": 2020}, {"source": "48", "target": "83", "source_name": "pop music", "target_name": "folk rock", "weight": 2.0, "year": 2020}, {"source": "48", "target": "87", "source_name": "pop music", "target_name": "music hall", "weight": 1.0, "year": 2020}, {"source": "49", "target": "53", "source_name": "music theory", "target_name": "popular music", "weight": 6.0, "year": 2020}, {"source": "49", "target": "54", "source_name": "music theory", "target_name": "american popular music", "weight": 1.0, "year": 2020}, {"source": "49", "target": "55", "source_name": "music theory", "target_name": "rock criticism", "weight": 1.0, "year": 2020}, {"source": "49", "target": "57", "source_name": "music theory", "target_name": "north america", "weight": 2.0, "year": 2020}, {"source": "49", "target": "61", "source_name": "music theory", "target_name": "progressive rock", "weight": 1.0, "year": 2020}, {"source": "49", "target": "69", "source_name": "music theory", "target_name": "classical music", "weight": 1.0, "year": 2020}, {"source": "49", "target": "72", "source_name": "music theory", "target_name": "jimi hendrix", "weight": 1.0, "year": 2020}, {"source": "49", "target": "77", "source_name": "music theory", "target_name": "rock music", "weight": 5.0, "year": 2020}, {"source": "49", "target": "78", "source_name": "music theory", "target_name": "hip hop", "weight": 1.0, "year": 2020}, {"source": "49", "target": "88", "source_name": "music theory", "target_name": "oxford university press", "weight": 2.0, "year": 2020}, {"source": "49", "target": "89", "source_name": "music theory", "target_name": "electronic music", "weight": 1.0, "year": 2020}, {"source": "50", "target": "53", "source_name": "hollywood film", "target_name": "popular music", "weight": 1.0, "year": 2020}, {"source": "50", "target": "60", "source_name": "hollywood film", "target_name": "cultural studies", "weight": 1.0, "year": 2020}, {"source": "50", "target": "79", "source_name": "hollywood film", "target_name": "popular culture", "weight": 1.0, "year": 2020}, {"source": "50", "target": "81", "source_name": "hollywood film", "target_name": "avant garde", "weight": 1.0, "year": 2020}, {"source": "50", "target": "88", "source_name": "hollywood film", "target_name": "oxford university press", "weight": 1.0, "year": 2020}, {"source": "51", "target": "52", "source_name": "cultural identity", "target_name": "folk song", "weight": 1.0, "year": 2020}, {"source": "51", "target": "53", "source_name": "cultural identity", "target_name": "popular music", "weight": 3.0, "year": 2020}, {"source": "51", "target": "60", "source_name": "cultural identity", "target_name": "cultural studies", "weight": 2.0, "year": 2020}, {"source": "51", "target": "65", "source_name": "cultural identity", "target_name": "country music", "weight": 1.0, "year": 2020}, {"source": "51", "target": "66", "source_name": "cultural identity", "target_name": "hong kong", "weight": 1.0, "year": 2020}, {"source": "51", "target": "72", "source_name": "cultural identity", "target_name": "jimi hendrix", "weight": 2.0, "year": 2020}, {"source": "51", "target": "74", "source_name": "cultural identity", "target_name": "united states", "weight": 2.0, "year": 2020}, {"source": "51", "target": "77", "source_name": "cultural identity", "target_name": "rock music", "weight": 7.0, "year": 2020}, {"source": "51", "target": "79", "source_name": "cultural identity", "target_name": "popular culture", "weight": 2.0, "year": 2020}, {"source": "51", "target": "80", "source_name": "cultural identity", "target_name": "folk music", "weight": 1.0, "year": 2020}, {"source": "51", "target": "82", "source_name": "cultural identity", "target_name": "heavy metal", "weight": 1.0, "year": 2020}, {"source": "52", "target": "53", "source_name": "folk song", "target_name": "popular music", "weight": 11.0, "year": 2020}, {"source": "52", "target": "54", "source_name": "folk song", "target_name": "american popular music", "weight": 2.0, "year": 2020}, {"source": "52", "target": "65", "source_name": "folk song", "target_name": "country music", "weight": 2.0, "year": 2020}, {"source": "52", "target": "66", "source_name": "folk song", "target_name": "hong kong", "weight": 1.0, "year": 2020}, {"source": "52", "target": "69", "source_name": "folk song", "target_name": "classical music", "weight": 2.0, "year": 2020}, {"source": "52", "target": "74", "source_name": "folk song", "target_name": "united states", "weight": 1.0, "year": 2020}, {"source": "52", "target": "77", "source_name": "folk song", "target_name": "rock music", "weight": 4.0, "year": 2020}, {"source": "52", "target": "80", "source_name": "folk song", "target_name": "folk music", "weight": 9.0, "year": 2020}, {"source": "52", "target": "87", "source_name": "folk song", "target_name": "music hall", "weight": 1.0, "year": 2020}, {"source": "52", "target": "89", "source_name": "folk song", "target_name": "electronic music", "weight": 1.0, "year": 2020}, {"source": "53", "target": "54", "source_name": "popular music", "target_name": "american popular music", "weight": 20.0, "year": 2020}, {"source": "53", "target": "55", "source_name": "popular music", "target_name": "rock criticism", "weight": 7.0, "year": 2020}, {"source": "53", "target": "56", "source_name": "popular music", "target_name": "bruce springsteen", "weight": 2.0, "year": 2020}, {"source": "53", "target": "57", "source_name": "popular music", "target_name": "north america", "weight": 9.0, "year": 2020}, {"source": "53", "target": "58", "source_name": "popular music", "target_name": "music therapy", "weight": 1.0, "year": 2020}, {"source": "53", "target": "59", "source_name": "popular music", "target_name": "college students", "weight": 3.0, "year": 2020}, {"source": "53", "target": "60", "source_name": "popular music", "target_name": "cultural studies", "weight": 10.0, "year": 2020}, {"source": "53", "target": "61", "source_name": "popular music", "target_name": "progressive rock", "weight": 16.0, "year": 2020}, {"source": "53", "target": "62", "source_name": "popular music", "target_name": "led zeppelin", "weight": 3.0, "year": 2020}, {"source": "53", "target": "64", "source_name": "popular music", "target_name": "english language", "weight": 2.0, "year": 2020}, {"source": "53", "target": "65", "source_name": "popular music", "target_name": "country music", "weight": 11.0, "year": 2020}, {"source": "53", "target": "66", "source_name": "popular music", "target_name": "hong kong", "weight": 4.0, "year": 2020}, {"source": "53", "target": "67", "source_name": "popular music", "target_name": "rock art", "weight": 9.0, "year": 2020}, {"source": "53", "target": "69", "source_name": "popular music", "target_name": "classical music", "weight": 20.0, "year": 2020}, {"source": "53", "target": "70", "source_name": "popular music", "target_name": "world war", "weight": 6.0, "year": 2020}, {"source": "53", "target": "71", "source_name": "popular music", "target_name": "latin american", "weight": 3.0, "year": 2020}, {"source": "53", "target": "72", "source_name": "popular music", "target_name": "jimi hendrix", "weight": 5.0, "year": 2020}, {"source": "53", "target": "73", "source_name": "popular music", "target_name": "southern rock", "weight": 2.0, "year": 2020}, {"source": "53", "target": "74", "source_name": "popular music", "target_name": "united states", "weight": 26.0, "year": 2020}, {"source": "53", "target": "75", "source_name": "popular music", "target_name": "world war ii", "weight": 4.0, "year": 2020}, {"source": "53", "target": "76", "source_name": "popular music", "target_name": "los angeles", "weight": 6.0, "year": 2020}, {"source": "53", "target": "77", "source_name": "popular music", "target_name": "rock music", "weight": 156.0, "year": 2020}, {"source": "53", "target": "78", "source_name": "popular music", "target_name": "hip hop", "weight": 13.0, "year": 2020}, {"source": "53", "target": "79", "source_name": "popular music", "target_name": "popular culture", "weight": 30.0, "year": 2020}, {"source": "53", "target": "80", "source_name": "popular music", "target_name": "folk music", "weight": 23.0, "year": 2020}, {"source": "53", "target": "82", "source_name": "popular music", "target_name": "heavy metal", "weight": 15.0, "year": 2020}, {"source": "53", "target": "83", "source_name": "popular music", "target_name": "folk rock", "weight": 3.0, "year": 2020}, {"source": "53", "target": "85", "source_name": "popular music", "target_name": "jewish music", "weight": 2.0, "year": 2020}, {"source": "53", "target": "87", "source_name": "popular music", "target_name": "music hall", "weight": 5.0, "year": 2020}, {"source": "53", "target": "88", "source_name": "popular music", "target_name": "oxford university press", "weight": 4.0, "year": 2020}, {"source": "53", "target": "89", "source_name": "popular music", "target_name": "electronic music", "weight": 11.0, "year": 2020}, {"source": "53", "target": "90", "source_name": "popular music", "target_name": "blues rock", "weight": 1.0, "year": 2020}, {"source": "54", "target": "55", "source_name": "american popular music", "target_name": "rock criticism", "weight": 1.0, "year": 2020}, {"source": "54", "target": "57", "source_name": "american popular music", "target_name": "north america", "weight": 2.0, "year": 2020}, {"source": "54", "target": "65", "source_name": "american popular music", "target_name": "country music", "weight": 5.0, "year": 2020}, {"source": "54", "target": "69", "source_name": "american popular music", "target_name": "classical music", "weight": 3.0, "year": 2020}, {"source": "54", "target": "70", "source_name": "american popular music", "target_name": "world war", "weight": 1.0, "year": 2020}, {"source": "54", "target": "71", "source_name": "american popular music", "target_name": "latin american", "weight": 1.0, "year": 2020}, {"source": "54", "target": "74", "source_name": "american popular music", "target_name": "united states", "weight": 5.0, "year": 2020}, {"source": "54", "target": "75", "source_name": "american popular music", "target_name": "world war ii", "weight": 1.0, "year": 2020}, {"source": "54", "target": "76", "source_name": "american popular music", "target_name": "los angeles", "weight": 1.0, "year": 2020}, {"source": "54", "target": "77", "source_name": "american popular music", "target_name": "rock music", "weight": 7.0, "year": 2020}, {"source": "54", "target": "78", "source_name": "american popular music", "target_name": "hip hop", "weight": 2.0, "year": 2020}, {"source": "54", "target": "79", "source_name": "american popular music", "target_name": "popular culture", "weight": 1.0, "year": 2020}, {"source": "54", "target": "80", "source_name": "american popular music", "target_name": "folk music", "weight": 1.0, "year": 2020}, {"source": "54", "target": "88", "source_name": "american popular music", "target_name": "oxford university press", "weight": 1.0, "year": 2020}, {"source": "54", "target": "89", "source_name": "american popular music", "target_name": "electronic music", "weight": 1.0, "year": 2020}, {"source": "55", "target": "56", "source_name": "rock criticism", "target_name": "bruce springsteen", "weight": 1.0, "year": 2020}, {"source": "55", "target": "57", "source_name": "rock criticism", "target_name": "north america", "weight": 1.0, "year": 2020}, {"source": "55", "target": "61", "source_name": "rock criticism", "target_name": "progressive rock", "weight": 3.0, "year": 2020}, {"source": "55", "target": "62", "source_name": "rock criticism", "target_name": "led zeppelin", "weight": 1.0, "year": 2020}, {"source": "55", "target": "65", "source_name": "rock criticism", "target_name": "country music", "weight": 1.0, "year": 2020}, {"source": "55", "target": "69", "source_name": "rock criticism", "target_name": "classical music", "weight": 1.0, "year": 2020}, {"source": "55", "target": "74", "source_name": "rock criticism", "target_name": "united states", "weight": 2.0, "year": 2020}, {"source": "55", "target": "77", "source_name": "rock criticism", "target_name": "rock music", "weight": 5.0, "year": 2020}, {"source": "55", "target": "78", "source_name": "rock criticism", "target_name": "hip hop", "weight": 1.0, "year": 2020}, {"source": "55", "target": "79", "source_name": "rock criticism", "target_name": "popular culture", "weight": 1.0, "year": 2020}, {"source": "55", "target": "82", "source_name": "rock criticism", "target_name": "heavy metal", "weight": 1.0, "year": 2020}, {"source": "55", "target": "88", "source_name": "rock criticism", "target_name": "oxford university press", "weight": 1.0, "year": 2020}, {"source": "56", "target": "67", "source_name": "bruce springsteen", "target_name": "rock art", "weight": 1.0, "year": 2020}, {"source": "56", "target": "72", "source_name": "bruce springsteen", "target_name": "jimi hendrix", "weight": 1.0, "year": 2020}, {"source": "56", "target": "77", "source_name": "bruce springsteen", "target_name": "rock music", "weight": 3.0, "year": 2020}, {"source": "56", "target": "78", "source_name": "bruce springsteen", "target_name": "hip hop", "weight": 1.0, "year": 2020}, {"source": "56", "target": "79", "source_name": "bruce springsteen", "target_name": "popular culture", "weight": 2.0, "year": 2020}, {"source": "56", "target": "82", "source_name": "bruce springsteen", "target_name": "heavy metal", "weight": 1.0, "year": 2020}, {"source": "57", "target": "61", "source_name": "north america", "target_name": "progressive rock", "weight": 1.0, "year": 2020}, {"source": "57", "target": "65", "source_name": "north america", "target_name": "country music", "weight": 2.0, "year": 2020}, {"source": "57", "target": "71", "source_name": "north america", "target_name": "latin american", "weight": 1.0, "year": 2020}, {"source": "57", "target": "73", "source_name": "north america", "target_name": "southern rock", "weight": 1.0, "year": 2020}, {"source": "57", "target": "74", "source_name": "north america", "target_name": "united states", "weight": 3.0, "year": 2020}, {"source": "57", "target": "77", "source_name": "north america", "target_name": "rock music", "weight": 8.0, "year": 2020}, {"source": "57", "target": "78", "source_name": "north america", "target_name": "hip hop", "weight": 1.0, "year": 2020}, {"source": "57", "target": "80", "source_name": "north america", "target_name": "folk music", "weight": 2.0, "year": 2020}, {"source": "57", "target": "82", "source_name": "north america", "target_name": "heavy metal", "weight": 1.0, "year": 2020}, {"source": "58", "target": "64", "source_name": "music therapy", "target_name": "english language", "weight": 1.0, "year": 2020}, {"source": "58", "target": "74", "source_name": "music therapy", "target_name": "united states", "weight": 1.0, "year": 2020}, {"source": "58", "target": "75", "source_name": "music therapy", "target_name": "world war ii", "weight": 1.0, "year": 2020}, {"source": "58", "target": "77", "source_name": "music therapy", "target_name": "rock music", "weight": 3.0, "year": 2020}, {"source": "59", "target": "69", "source_name": "college students", "target_name": "classical music", "weight": 1.0, "year": 2020}, {"source": "59", "target": "74", "source_name": "college students", "target_name": "united states", "weight": 1.0, "year": 2020}, {"source": "59", "target": "77", "source_name": "college students", "target_name": "rock music", "weight": 5.0, "year": 2020}, {"source": "59", "target": "82", "source_name": "college students", "target_name": "heavy metal", "weight": 2.0, "year": 2020}, {"source": "60", "target": "61", "source_name": "cultural studies", "target_name": "progressive rock", "weight": 1.0, "year": 2020}, {"source": "60", "target": "62", "source_name": "cultural studies", "target_name": "led zeppelin", "weight": 1.0, "year": 2020}, {"source": "60", "target": "71", "source_name": "cultural studies", "target_name": "latin american", "weight": 1.0, "year": 2020}, {"source": "60", "target": "74", "source_name": "cultural studies", "target_name": "united states", "weight": 1.0, "year": 2020}, {"source": "60", "target": "76", "source_name": "cultural studies", "target_name": "los angeles", "weight": 1.0, "year": 2020}, {"source": "60", "target": "77", "source_name": "cultural studies", "target_name": "rock music", "weight": 9.0, "year": 2020}, {"source": "60", "target": "79", "source_name": "cultural studies", "target_name": "popular culture", "weight": 6.0, "year": 2020}, {"source": "60", "target": "80", "source_name": "cultural studies", "target_name": "folk music", "weight": 2.0, "year": 2020}, {"source": "60", "target": "81", "source_name": "cultural studies", "target_name": "avant garde", "weight": 1.0, "year": 2020}, {"source": "60", "target": "85", "source_name": "cultural studies", "target_name": "jewish music", "weight": 1.0, "year": 2020}, {"source": "60", "target": "87", "source_name": "cultural studies", "target_name": "music hall", "weight": 1.0, "year": 2020}, {"source": "60", "target": "88", "source_name": "cultural studies", "target_name": "oxford university press", "weight": 4.0, "year": 2020}, {"source": "60", "target": "89", "source_name": "cultural studies", "target_name": "electronic music", "weight": 1.0, "year": 2020}, {"source": "61", "target": "62", "source_name": "progressive rock", "target_name": "led zeppelin", "weight": 1.0, "year": 2020}, {"source": "61", "target": "67", "source_name": "progressive rock", "target_name": "rock art", "weight": 1.0, "year": 2020}, {"source": "61", "target": "69", "source_name": "progressive rock", "target_name": "classical music", "weight": 4.0, "year": 2020}, {"source": "61", "target": "72", "source_name": "progressive rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2020}, {"source": "61", "target": "74", "source_name": "progressive rock", "target_name": "united states", "weight": 3.0, "year": 2020}, {"source": "61", "target": "77", "source_name": "progressive rock", "target_name": "rock music", "weight": 26.0, "year": 2020}, {"source": "61", "target": "80", "source_name": "progressive rock", "target_name": "folk music", "weight": 4.0, "year": 2020}, {"source": "61", "target": "82", "source_name": "progressive rock", "target_name": "heavy metal", "weight": 3.0, "year": 2020}, {"source": "61", "target": "83", "source_name": "progressive rock", "target_name": "folk rock", "weight": 1.0, "year": 2020}, {"source": "61", "target": "88", "source_name": "progressive rock", "target_name": "oxford university press", "weight": 2.0, "year": 2020}, {"source": "61", "target": "89", "source_name": "progressive rock", "target_name": "electronic music", "weight": 1.0, "year": 2020}, {"source": "62", "target": "67", "source_name": "led zeppelin", "target_name": "rock art", "weight": 1.0, "year": 2020}, {"source": "62", "target": "69", "source_name": "led zeppelin", "target_name": "classical music", "weight": 2.0, "year": 2020}, {"source": "62", "target": "72", "source_name": "led zeppelin", "target_name": "jimi hendrix", "weight": 2.0, "year": 2020}, {"source": "62", "target": "74", "source_name": "led zeppelin", "target_name": "united states", "weight": 1.0, "year": 2020}, {"source": "62", "target": "77", "source_name": "led zeppelin", "target_name": "rock music", "weight": 4.0, "year": 2020}, {"source": "62", "target": "78", "source_name": "led zeppelin", "target_name": "hip hop", "weight": 1.0, "year": 2020}, {"source": "62", "target": "80", "source_name": "led zeppelin", "target_name": "folk music", "weight": 1.0, "year": 2020}, {"source": "62", "target": "82", "source_name": "led zeppelin", "target_name": "heavy metal", "weight": 2.0, "year": 2020}, {"source": "62", "target": "88", "source_name": "led zeppelin", "target_name": "oxford university press", "weight": 1.0, "year": 2020}, {"source": "63", "target": "77", "source_name": "post rock", "target_name": "rock music", "weight": 1.0, "year": 2020}, {"source": "64", "target": "66", "source_name": "english language", "target_name": "hong kong", "weight": 1.0, "year": 2020}, {"source": "64", "target": "67", "source_name": "english language", "target_name": "rock art", "weight": 1.0, "year": 2020}, {"source": "64", "target": "70", "source_name": "english language", "target_name": "world war", "weight": 1.0, "year": 2020}, {"source": "64", "target": "74", "source_name": "english language", "target_name": "united states", "weight": 2.0, "year": 2020}, {"source": "64", "target": "77", "source_name": "english language", "target_name": "rock music", "weight": 2.0, "year": 2020}, {"source": "64", "target": "79", "source_name": "english language", "target_name": "popular culture", "weight": 1.0, "year": 2020}, {"source": "64", "target": "83", "source_name": "english language", "target_name": "folk rock", "weight": 1.0, "year": 2020}, {"source": "65", "target": "69", "source_name": "country music", "target_name": "classical music", "weight": 4.0, "year": 2020}, {"source": "65", "target": "72", "source_name": "country music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2020}, {"source": "65", "target": "73", "source_name": "country music", "target_name": "southern rock", "weight": 2.0, "year": 2020}, {"source": "65", "target": "74", "source_name": "country music", "target_name": "united states", "weight": 3.0, "year": 2020}, {"source": "65", "target": "77", "source_name": "country music", "target_name": "rock music", "weight": 5.0, "year": 2020}, {"source": "65", "target": "78", "source_name": "country music", "target_name": "hip hop", "weight": 1.0, "year": 2020}, {"source": "65", "target": "79", "source_name": "country music", "target_name": "popular culture", "weight": 2.0, "year": 2020}, {"source": "65", "target": "80", "source_name": "country music", "target_name": "folk music", "weight": 4.0, "year": 2020}, {"source": "65", "target": "82", "source_name": "country music", "target_name": "heavy metal", "weight": 2.0, "year": 2020}, {"source": "65", "target": "89", "source_name": "country music", "target_name": "electronic music", "weight": 2.0, "year": 2020}, {"source": "66", "target": "67", "source_name": "hong kong", "target_name": "rock art", "weight": 1.0, "year": 2020}, {"source": "66", "target": "77", "source_name": "hong kong", "target_name": "rock music", "weight": 2.0, "year": 2020}, {"source": "66", "target": "78", "source_name": "hong kong", "target_name": "hip hop", "weight": 1.0, "year": 2020}, {"source": "66", "target": "80", "source_name": "hong kong", "target_name": "folk music", "weight": 1.0, "year": 2020}, {"source": "66", "target": "83", "source_name": "hong kong", "target_name": "folk rock", "weight": 1.0, "year": 2020}, {"source": "66", "target": "85", "source_name": "hong kong", "target_name": "jewish music", "weight": 1.0, "year": 2020}, {"source": "67", "target": "69", "source_name": "rock art", "target_name": "classical music", "weight": 1.0, "year": 2020}, {"source": "67", "target": "74", "source_name": "rock art", "target_name": "united states", "weight": 1.0, "year": 2020}, {"source": "67", "target": "77", "source_name": "rock art", "target_name": "rock music", "weight": 11.0, "year": 2020}, {"source": "67", "target": "79", "source_name": "rock art", "target_name": "popular culture", "weight": 1.0, "year": 2020}, {"source": "67", "target": "80", "source_name": "rock art", "target_name": "folk music", "weight": 1.0, "year": 2020}, {"source": "67", "target": "82", "source_name": "rock art", "target_name": "heavy metal", "weight": 1.0, "year": 2020}, {"source": "67", "target": "83", "source_name": "rock art", "target_name": "folk rock", "weight": 1.0, "year": 2020}, {"source": "67", "target": "89", "source_name": "rock art", "target_name": "electronic music", "weight": 1.0, "year": 2020}, {"source": "68", "target": "69", "source_name": "hearing loss", "target_name": "classical music", "weight": 1.0, "year": 2020}, {"source": "68", "target": "77", "source_name": "hearing loss", "target_name": "rock music", "weight": 4.0, "year": 2020}, {"source": "69", "target": "70", "source_name": "classical music", "target_name": "world war", "weight": 2.0, "year": 2020}, {"source": "69", "target": "71", "source_name": "classical music", "target_name": "latin american", "weight": 1.0, "year": 2020}, {"source": "69", "target": "72", "source_name": "classical music", "target_name": "jimi hendrix", "weight": 2.0, "year": 2020}, {"source": "69", "target": "74", "source_name": "classical music", "target_name": "united states", "weight": 6.0, "year": 2020}, {"source": "69", "target": "75", "source_name": "classical music", "target_name": "world war ii", "weight": 1.0, "year": 2020}, {"source": "69", "target": "76", "source_name": "classical music", "target_name": "los angeles", "weight": 1.0, "year": 2020}, {"source": "69", "target": "77", "source_name": "classical music", "target_name": "rock music", "weight": 46.0, "year": 2020}, {"source": "69", "target": "78", "source_name": "classical music", "target_name": "hip hop", "weight": 2.0, "year": 2020}, {"source": "69", "target": "79", "source_name": "classical music", "target_name": "popular culture", "weight": 4.0, "year": 2020}, {"source": "69", "target": "80", "source_name": "classical music", "target_name": "folk music", "weight": 6.0, "year": 2020}, {"source": "69", "target": "82", "source_name": "classical music", "target_name": "heavy metal", "weight": 4.0, "year": 2020}, {"source": "69", "target": "87", "source_name": "classical music", "target_name": "music hall", "weight": 2.0, "year": 2020}, {"source": "69", "target": "88", "source_name": "classical music", "target_name": "oxford university press", "weight": 1.0, "year": 2020}, {"source": "69", "target": "89", "source_name": "classical music", "target_name": "electronic music", "weight": 4.0, "year": 2020}, {"source": "70", "target": "74", "source_name": "world war", "target_name": "united states", "weight": 2.0, "year": 2020}, {"source": "70", "target": "75", "source_name": "world war", "target_name": "world war ii", "weight": 6.0, "year": 2020}, {"source": "70", "target": "77", "source_name": "world war", "target_name": "rock music", "weight": 6.0, "year": 2020}, {"source": "70", "target": "79", "source_name": "world war", "target_name": "popular culture", "weight": 1.0, "year": 2020}, {"source": "70", "target": "80", "source_name": "world war", "target_name": "folk music", "weight": 1.0, "year": 2020}, {"source": "70", "target": "87", "source_name": "world war", "target_name": "music hall", "weight": 1.0, "year": 2020}, {"source": "70", "target": "89", "source_name": "world war", "target_name": "electronic music", "weight": 1.0, "year": 2020}, {"source": "71", "target": "74", "source_name": "latin american", "target_name": "united states", "weight": 4.0, "year": 2020}, {"source": "71", "target": "76", "source_name": "latin american", "target_name": "los angeles", "weight": 2.0, "year": 2020}, {"source": "71", "target": "77", "source_name": "latin american", "target_name": "rock music", "weight": 5.0, "year": 2020}, {"source": "71", "target": "79", "source_name": "latin american", "target_name": "popular culture", "weight": 1.0, "year": 2020}, {"source": "72", "target": "74", "source_name": "jimi hendrix", "target_name": "united states", "weight": 2.0, "year": 2020}, {"source": "72", "target": "77", "source_name": "jimi hendrix", "target_name": "rock music", "weight": 8.0, "year": 2020}, {"source": "72", "target": "79", "source_name": "jimi hendrix", "target_name": "popular culture", "weight": 2.0, "year": 2020}, {"source": "72", "target": "80", "source_name": "jimi hendrix", "target_name": "folk music", "weight": 1.0, "year": 2020}, {"source": "72", "target": "89", "source_name": "jimi hendrix", "target_name": "electronic music", "weight": 1.0, "year": 2020}, {"source": "73", "target": "77", "source_name": "southern rock", "target_name": "rock music", "weight": 1.0, "year": 2020}, {"source": "73", "target": "80", "source_name": "southern rock", "target_name": "folk music", "weight": 1.0, "year": 2020}, {"source": "74", "target": "76", "source_name": "united states", "target_name": "los angeles", "weight": 1.0, "year": 2020}, {"source": "74", "target": "77", "source_name": "united states", "target_name": "rock music", "weight": 19.0, "year": 2020}, {"source": "74", "target": "78", "source_name": "united states", "target_name": "hip hop", "weight": 2.0, "year": 2020}, {"source": "74", "target": "79", "source_name": "united states", "target_name": "popular culture", "weight": 3.0, "year": 2020}, {"source": "74", "target": "80", "source_name": "united states", "target_name": "folk music", "weight": 5.0, "year": 2020}, {"source": "74", "target": "88", "source_name": "united states", "target_name": "oxford university press", "weight": 1.0, "year": 2020}, {"source": "74", "target": "89", "source_name": "united states", "target_name": "electronic music", "weight": 3.0, "year": 2020}, {"source": "75", "target": "76", "source_name": "world war ii", "target_name": "los angeles", "weight": 1.0, "year": 2020}, {"source": "75", "target": "77", "source_name": "world war ii", "target_name": "rock music", "weight": 3.0, "year": 2020}, {"source": "75", "target": "80", "source_name": "world war ii", "target_name": "folk music", "weight": 1.0, "year": 2020}, {"source": "76", "target": "77", "source_name": "los angeles", "target_name": "rock music", "weight": 8.0, "year": 2020}, {"source": "76", "target": "79", "source_name": "los angeles", "target_name": "popular culture", "weight": 1.0, "year": 2020}, {"source": "76", "target": "80", "source_name": "los angeles", "target_name": "folk music", "weight": 2.0, "year": 2020}, {"source": "77", "target": "78", "source_name": "rock music", "target_name": "hip hop", "weight": 6.0, "year": 2020}, {"source": "77", "target": "79", "source_name": "rock music", "target_name": "popular culture", "weight": 26.0, "year": 2020}, {"source": "77", "target": "80", "source_name": "rock music", "target_name": "folk music", "weight": 17.0, "year": 2020}, {"source": "77", "target": "82", "source_name": "rock music", "target_name": "heavy metal", "weight": 22.0, "year": 2020}, {"source": "77", "target": "83", "source_name": "rock music", "target_name": "folk rock", "weight": 3.0, "year": 2020}, {"source": "77", "target": "87", "source_name": "rock music", "target_name": "music hall", "weight": 5.0, "year": 2020}, {"source": "77", "target": "88", "source_name": "rock music", "target_name": "oxford university press", "weight": 3.0, "year": 2020}, {"source": "77", "target": "89", "source_name": "rock music", "target_name": "electronic music", "weight": 6.0, "year": 2020}, {"source": "77", "target": "90", "source_name": "rock music", "target_name": "blues rock", "weight": 7.0, "year": 2020}, {"source": "78", "target": "79", "source_name": "hip hop", "target_name": "popular culture", "weight": 2.0, "year": 2020}, {"source": "78", "target": "80", "source_name": "hip hop", "target_name": "folk music", "weight": 3.0, "year": 2020}, {"source": "78", "target": "82", "source_name": "hip hop", "target_name": "heavy metal", "weight": 2.0, "year": 2020}, {"source": "78", "target": "85", "source_name": "hip hop", "target_name": "jewish music", "weight": 1.0, "year": 2020}, {"source": "78", "target": "88", "source_name": "hip hop", "target_name": "oxford university press", "weight": 1.0, "year": 2020}, {"source": "78", "target": "89", "source_name": "hip hop", "target_name": "electronic music", "weight": 1.0, "year": 2020}, {"source": "78", "target": "90", "source_name": "hip hop", "target_name": "blues rock", "weight": 1.0, "year": 2020}, {"source": "79", "target": "80", "source_name": "popular culture", "target_name": "folk music", "weight": 3.0, "year": 2020}, {"source": "79", "target": "82", "source_name": "popular culture", "target_name": "heavy metal", "weight": 3.0, "year": 2020}, {"source": "79", "target": "85", "source_name": "popular culture", "target_name": "jewish music", "weight": 1.0, "year": 2020}, {"source": "79", "target": "87", "source_name": "popular culture", "target_name": "music hall", "weight": 3.0, "year": 2020}, {"source": "79", "target": "88", "source_name": "popular culture", "target_name": "oxford university press", "weight": 1.0, "year": 2020}, {"source": "79", "target": "89", "source_name": "popular culture", "target_name": "electronic music", "weight": 1.0, "year": 2020}, {"source": "80", "target": "82", "source_name": "folk music", "target_name": "heavy metal", "weight": 1.0, "year": 2020}, {"source": "80", "target": "85", "source_name": "folk music", "target_name": "jewish music", "weight": 2.0, "year": 2020}, {"source": "80", "target": "87", "source_name": "folk music", "target_name": "music hall", "weight": 3.0, "year": 2020}, {"source": "80", "target": "88", "source_name": "folk music", "target_name": "oxford university press", "weight": 1.0, "year": 2020}, {"source": "80", "target": "89", "source_name": "folk music", "target_name": "electronic music", "weight": 4.0, "year": 2020}, {"source": "81", "target": "88", "source_name": "avant garde", "target_name": "oxford university press", "weight": 1.0, "year": 2020}, {"source": "82", "target": "83", "source_name": "heavy metal", "target_name": "folk rock", "weight": 2.0, "year": 2020}, {"source": "85", "target": "88", "source_name": "jewish music", "target_name": "oxford university press", "weight": 1.0, "year": 2020}, {"source": "88", "target": "89", "source_name": "oxford university press", "target_name": "electronic music", "weight": 1.0, "year": 2020}]}, {"2021": [{"source": "1", "target": "6", "source_name": "rock star", "target_name": "elvis presley", "weight": 1.0, "year": 2021}, {"source": "1", "target": "7", "source_name": "rock star", "target_name": "nineteenth century", "weight": 1.0, "year": 2021}, {"source": "1", "target": "9", "source_name": "rock star", "target_name": "compact disc", "weight": 1.0, "year": 2021}, {"source": "1", "target": "16", "source_name": "rock star", "target_name": "bob dylan", "weight": 1.0, "year": 2021}, {"source": "1", "target": "19", "source_name": "rock star", "target_name": "music video", "weight": 1.0, "year": 2021}, {"source": "1", "target": "23", "source_name": "rock star", "target_name": "electronic dance music", "weight": 1.0, "year": 2021}, {"source": "1", "target": "24", "source_name": "rock star", "target_name": "punk rock", "weight": 1.0, "year": 2021}, {"source": "1", "target": "28", "source_name": "rock star", "target_name": "high school", "weight": 1.0, "year": 2021}, {"source": "1", "target": "29", "source_name": "rock star", "target_name": "rolling stone", "weight": 2.0, "year": 2021}, {"source": "1", "target": "36", "source_name": "rock star", "target_name": "music industry", "weight": 4.0, "year": 2021}, {"source": "1", "target": "41", "source_name": "rock star", "target_name": "youth culture", "weight": 2.0, "year": 2021}, {"source": "1", "target": "42", "source_name": "rock star", "target_name": "simon frith", "weight": 1.0, "year": 2021}, {"source": "1", "target": "48", "source_name": "rock star", "target_name": "pop music", "weight": 4.0, "year": 2021}, {"source": "1", "target": "51", "source_name": "rock star", "target_name": "cultural identity", "weight": 2.0, "year": 2021}, {"source": "1", "target": "53", "source_name": "rock star", "target_name": "popular music", "weight": 7.0, "year": 2021}, {"source": "1", "target": "56", "source_name": "rock star", "target_name": "bruce springsteen", "weight": 1.0, "year": 2021}, {"source": "1", "target": "57", "source_name": "rock star", "target_name": "north america", "weight": 1.0, "year": 2021}, {"source": "1", "target": "60", "source_name": "rock star", "target_name": "cultural studies", "weight": 1.0, "year": 2021}, {"source": "1", "target": "67", "source_name": "rock star", "target_name": "rock art", "weight": 1.0, "year": 2021}, {"source": "1", "target": "69", "source_name": "rock star", "target_name": "classical music", "weight": 1.0, "year": 2021}, {"source": "1", "target": "74", "source_name": "rock star", "target_name": "united states", "weight": 1.0, "year": 2021}, {"source": "1", "target": "77", "source_name": "rock star", "target_name": "rock music", "weight": 11.0, "year": 2021}, {"source": "1", "target": "79", "source_name": "rock star", "target_name": "popular culture", "weight": 2.0, "year": 2021}, {"source": "1", "target": "82", "source_name": "rock star", "target_name": "heavy metal", "weight": 3.0, "year": 2021}, {"source": "1", "target": "89", "source_name": "rock star", "target_name": "electronic music", "weight": 1.0, "year": 2021}, {"source": "2", "target": "3", "source_name": "indie rock", "target_name": "glam rock", "weight": 1.0, "year": 2021}, {"source": "2", "target": "19", "source_name": "indie rock", "target_name": "music video", "weight": 1.0, "year": 2021}, {"source": "2", "target": "20", "source_name": "indie rock", "target_name": "garage rock", "weight": 1.0, "year": 2021}, {"source": "2", "target": "24", "source_name": "indie rock", "target_name": "punk rock", "weight": 1.0, "year": 2021}, {"source": "2", "target": "27", "source_name": "indie rock", "target_name": "pop rock", "weight": 1.0, "year": 2021}, {"source": "2", "target": "30", "source_name": "indie rock", "target_name": "rock band", "weight": 2.0, "year": 2021}, {"source": "2", "target": "36", "source_name": "indie rock", "target_name": "music industry", "weight": 1.0, "year": 2021}, {"source": "2", "target": "44", "source_name": "indie rock", "target_name": "alternative rock", "weight": 1.0, "year": 2021}, {"source": "2", "target": "47", "source_name": "indie rock", "target_name": "hard rock", "weight": 1.0, "year": 2021}, {"source": "2", "target": "48", "source_name": "indie rock", "target_name": "pop music", "weight": 2.0, "year": 2021}, {"source": "2", "target": "51", "source_name": "indie rock", "target_name": "cultural identity", "weight": 1.0, "year": 2021}, {"source": "2", "target": "53", "source_name": "indie rock", "target_name": "popular music", "weight": 2.0, "year": 2021}, {"source": "2", "target": "67", "source_name": "indie rock", "target_name": "rock art", "weight": 2.0, "year": 2021}, {"source": "2", "target": "69", "source_name": "indie rock", "target_name": "classical music", "weight": 1.0, "year": 2021}, {"source": "2", "target": "72", "source_name": "indie rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2021}, {"source": "2", "target": "74", "source_name": "indie rock", "target_name": "united states", "weight": 1.0, "year": 2021}, {"source": "2", "target": "77", "source_name": "indie rock", "target_name": "rock music", "weight": 6.0, "year": 2021}, {"source": "2", "target": "78", "source_name": "indie rock", "target_name": "hip hop", "weight": 1.0, "year": 2021}, {"source": "2", "target": "80", "source_name": "indie rock", "target_name": "folk music", "weight": 1.0, "year": 2021}, {"source": "3", "target": "20", "source_name": "glam rock", "target_name": "garage rock", "weight": 2.0, "year": 2021}, {"source": "3", "target": "24", "source_name": "glam rock", "target_name": "punk rock", "weight": 2.0, "year": 2021}, {"source": "3", "target": "27", "source_name": "glam rock", "target_name": "pop rock", "weight": 1.0, "year": 2021}, {"source": "3", "target": "41", "source_name": "glam rock", "target_name": "youth culture", "weight": 1.0, "year": 2021}, {"source": "3", "target": "44", "source_name": "glam rock", "target_name": "alternative rock", "weight": 1.0, "year": 2021}, {"source": "3", "target": "47", "source_name": "glam rock", "target_name": "hard rock", "weight": 1.0, "year": 2021}, {"source": "3", "target": "53", "source_name": "glam rock", "target_name": "popular music", "weight": 1.0, "year": 2021}, {"source": "3", "target": "77", "source_name": "glam rock", "target_name": "rock music", "weight": 3.0, "year": 2021}, {"source": "3", "target": "79", "source_name": "glam rock", "target_name": "popular culture", "weight": 2.0, "year": 2021}, {"source": "3", "target": "87", "source_name": "glam rock", "target_name": "music hall", "weight": 1.0, "year": 2021}, {"source": "4", "target": "7", "source_name": "gregorian chant", "target_name": "nineteenth century", "weight": 1.0, "year": 2021}, {"source": "4", "target": "9", "source_name": "gregorian chant", "target_name": "compact disc", "weight": 1.0, "year": 2021}, {"source": "4", "target": "10", "source_name": "gregorian chant", "target_name": "african american", "weight": 1.0, "year": 2021}, {"source": "4", "target": "19", "source_name": "gregorian chant", "target_name": "music video", "weight": 1.0, "year": 2021}, {"source": "4", "target": "22", "source_name": "gregorian chant", "target_name": "chamber music", "weight": 1.0, "year": 2021}, {"source": "4", "target": "36", "source_name": "gregorian chant", "target_name": "music industry", "weight": 1.0, "year": 2021}, {"source": "4", "target": "37", "source_name": "gregorian chant", "target_name": "middle ages", "weight": 1.0, "year": 2021}, {"source": "4", "target": "38", "source_name": "gregorian chant", "target_name": "summary additional listening", "weight": 1.0, "year": 2021}, {"source": "4", "target": "40", "source_name": "gregorian chant", "target_name": "musical instruments", "weight": 1.0, "year": 2021}, {"source": "4", "target": "48", "source_name": "gregorian chant", "target_name": "pop music", "weight": 1.0, "year": 2021}, {"source": "4", "target": "52", "source_name": "gregorian chant", "target_name": "folk song", "weight": 1.0, "year": 2021}, {"source": "4", "target": "53", "source_name": "gregorian chant", "target_name": "popular music", "weight": 1.0, "year": 2021}, {"source": "4", "target": "54", "source_name": "gregorian chant", "target_name": "american popular music", "weight": 1.0, "year": 2021}, {"source": "4", "target": "65", "source_name": "gregorian chant", "target_name": "country music", "weight": 1.0, "year": 2021}, {"source": "4", "target": "69", "source_name": "gregorian chant", "target_name": "classical music", "weight": 1.0, "year": 2021}, {"source": "4", "target": "74", "source_name": "gregorian chant", "target_name": "united states", "weight": 1.0, "year": 2021}, {"source": "4", "target": "77", "source_name": "gregorian chant", "target_name": "rock music", "weight": 1.0, "year": 2021}, {"source": "4", "target": "80", "source_name": "gregorian chant", "target_name": "folk music", "weight": 1.0, "year": 2021}, {"source": "4", "target": "89", "source_name": "gregorian chant", "target_name": "electronic music", "weight": 1.0, "year": 2021}, {"source": "5", "target": "12", "source_name": "jesus christ superstar", "target_name": "rock opera", "weight": 4.0, "year": 2021}, {"source": "5", "target": "15", "source_name": "jesus christ superstar", "target_name": "musical theatre", "weight": 3.0, "year": 2021}, {"source": "5", "target": "33", "source_name": "jesus christ superstar", "target_name": "jesus christ", "weight": 5.0, "year": 2021}, {"source": "5", "target": "34", "source_name": "jesus christ superstar", "target_name": "mass media", "weight": 1.0, "year": 2021}, {"source": "5", "target": "41", "source_name": "jesus christ superstar", "target_name": "youth culture", "weight": 1.0, "year": 2021}, {"source": "5", "target": "53", "source_name": "jesus christ superstar", "target_name": "popular music", "weight": 1.0, "year": 2021}, {"source": "5", "target": "77", "source_name": "jesus christ superstar", "target_name": "rock music", "weight": 7.0, "year": 2021}, {"source": "5", "target": "89", "source_name": "jesus christ superstar", "target_name": "electronic music", "weight": 1.0, "year": 2021}, {"source": "6", "target": "10", "source_name": "elvis presley", "target_name": "african american", "weight": 1.0, "year": 2021}, {"source": "6", "target": "16", "source_name": "elvis presley", "target_name": "bob dylan", "weight": 4.0, "year": 2021}, {"source": "6", "target": "17", "source_name": "elvis presley", "target_name": "civil rights", "weight": 1.0, "year": 2021}, {"source": "6", "target": "23", "source_name": "elvis presley", "target_name": "electronic dance music", "weight": 1.0, "year": 2021}, {"source": "6", "target": "29", "source_name": "elvis presley", "target_name": "rolling stone", "weight": 2.0, "year": 2021}, {"source": "6", "target": "36", "source_name": "elvis presley", "target_name": "music industry", "weight": 3.0, "year": 2021}, {"source": "6", "target": "40", "source_name": "elvis presley", "target_name": "musical instruments", "weight": 1.0, "year": 2021}, {"source": "6", "target": "41", "source_name": "elvis presley", "target_name": "youth culture", "weight": 1.0, "year": 2021}, {"source": "6", "target": "42", "source_name": "elvis presley", "target_name": "simon frith", "weight": 2.0, "year": 2021}, {"source": "6", "target": "47", "source_name": "elvis presley", "target_name": "hard rock", "weight": 1.0, "year": 2021}, {"source": "6", "target": "48", "source_name": "elvis presley", "target_name": "pop music", "weight": 1.0, "year": 2021}, {"source": "6", "target": "49", "source_name": "elvis presley", "target_name": "music theory", "weight": 1.0, "year": 2021}, {"source": "6", "target": "51", "source_name": "elvis presley", "target_name": "cultural identity", "weight": 1.0, "year": 2021}, {"source": "6", "target": "53", "source_name": "elvis presley", "target_name": "popular music", "weight": 9.0, "year": 2021}, {"source": "6", "target": "54", "source_name": "elvis presley", "target_name": "american popular music", "weight": 3.0, "year": 2021}, {"source": "6", "target": "56", "source_name": "elvis presley", "target_name": "bruce springsteen", "weight": 2.0, "year": 2021}, {"source": "6", "target": "60", "source_name": "elvis presley", "target_name": "cultural studies", "weight": 1.0, "year": 2021}, {"source": "6", "target": "67", "source_name": "elvis presley", "target_name": "rock art", "weight": 1.0, "year": 2021}, {"source": "6", "target": "70", "source_name": "elvis presley", "target_name": "world war", "weight": 1.0, "year": 2021}, {"source": "6", "target": "72", "source_name": "elvis presley", "target_name": "jimi hendrix", "weight": 1.0, "year": 2021}, {"source": "6", "target": "74", "source_name": "elvis presley", "target_name": "united states", "weight": 2.0, "year": 2021}, {"source": "6", "target": "75", "source_name": "elvis presley", "target_name": "world war ii", "weight": 1.0, "year": 2021}, {"source": "6", "target": "77", "source_name": "elvis presley", "target_name": "rock music", "weight": 5.0, "year": 2021}, {"source": "6", "target": "78", "source_name": "elvis presley", "target_name": "hip hop", "weight": 1.0, "year": 2021}, {"source": "6", "target": "79", "source_name": "elvis presley", "target_name": "popular culture", "weight": 2.0, "year": 2021}, {"source": "6", "target": "80", "source_name": "elvis presley", "target_name": "folk music", "weight": 1.0, "year": 2021}, {"source": "6", "target": "82", "source_name": "elvis presley", "target_name": "heavy metal", "weight": 1.0, "year": 2021}, {"source": "7", "target": "9", "source_name": "nineteenth century", "target_name": "compact disc", "weight": 1.0, "year": 2021}, {"source": "7", "target": "10", "source_name": "nineteenth century", "target_name": "african american", "weight": 1.0, "year": 2021}, {"source": "7", "target": "19", "source_name": "nineteenth century", "target_name": "music video", "weight": 1.0, "year": 2021}, {"source": "7", "target": "22", "source_name": "nineteenth century", "target_name": "chamber music", "weight": 1.0, "year": 2021}, {"source": "7", "target": "34", "source_name": "nineteenth century", "target_name": "mass media", "weight": 1.0, "year": 2021}, {"source": "7", "target": "35", "source_name": "nineteenth century", "target_name": "ancient greek", "weight": 1.0, "year": 2021}, {"source": "7", "target": "36", "source_name": "nineteenth century", "target_name": "music industry", "weight": 2.0, "year": 2021}, {"source": "7", "target": "38", "source_name": "nineteenth century", "target_name": "summary additional listening", "weight": 1.0, "year": 2021}, {"source": "7", "target": "40", "source_name": "nineteenth century", "target_name": "musical instruments", "weight": 1.0, "year": 2021}, {"source": "7", "target": "43", "source_name": "nineteenth century", "target_name": "music education", "weight": 1.0, "year": 2021}, {"source": "7", "target": "45", "source_name": "nineteenth century", "target_name": "double bass", "weight": 2.0, "year": 2021}, {"source": "7", "target": "48", "source_name": "nineteenth century", "target_name": "pop music", "weight": 1.0, "year": 2021}, {"source": "7", "target": "49", "source_name": "nineteenth century", "target_name": "music theory", "weight": 1.0, "year": 2021}, {"source": "7", "target": "50", "source_name": "nineteenth century", "target_name": "hollywood film", "weight": 1.0, "year": 2021}, {"source": "7", "target": "52", "source_name": "nineteenth century", "target_name": "folk song", "weight": 3.0, "year": 2021}, {"source": "7", "target": "53", "source_name": "nineteenth century", "target_name": "popular music", "weight": 4.0, "year": 2021}, {"source": "7", "target": "54", "source_name": "nineteenth century", "target_name": "american popular music", "weight": 1.0, "year": 2021}, {"source": "7", "target": "65", "source_name": "nineteenth century", "target_name": "country music", "weight": 1.0, "year": 2021}, {"source": "7", "target": "67", "source_name": "nineteenth century", "target_name": "rock art", "weight": 1.0, "year": 2021}, {"source": "7", "target": "69", "source_name": "nineteenth century", "target_name": "classical music", "weight": 4.0, "year": 2021}, {"source": "7", "target": "70", "source_name": "nineteenth century", "target_name": "world war", "weight": 2.0, "year": 2021}, {"source": "7", "target": "74", "source_name": "nineteenth century", "target_name": "united states", "weight": 2.0, "year": 2021}, {"source": "7", "target": "77", "source_name": "nineteenth century", "target_name": "rock music", "weight": 4.0, "year": 2021}, {"source": "7", "target": "79", "source_name": "nineteenth century", "target_name": "popular culture", "weight": 1.0, "year": 2021}, {"source": "7", "target": "80", "source_name": "nineteenth century", "target_name": "folk music", "weight": 3.0, "year": 2021}, {"source": "7", "target": "85", "source_name": "nineteenth century", "target_name": "jewish music", "weight": 1.0, "year": 2021}, {"source": "7", "target": "87", "source_name": "nineteenth century", "target_name": "music hall", "weight": 1.0, "year": 2021}, {"source": "7", "target": "89", "source_name": "nineteenth century", "target_name": "electronic music", "weight": 1.0, "year": 2021}, {"source": "8", "target": "20", "source_name": "christian rock", "target_name": "garage rock", "weight": 1.0, "year": 2021}, {"source": "8", "target": "36", "source_name": "christian rock", "target_name": "music industry", "weight": 1.0, "year": 2021}, {"source": "8", "target": "44", "source_name": "christian rock", "target_name": "alternative rock", "weight": 1.0, "year": 2021}, {"source": "8", "target": "53", "source_name": "christian rock", "target_name": "popular music", "weight": 2.0, "year": 2021}, {"source": "8", "target": "57", "source_name": "christian rock", "target_name": "north america", "weight": 1.0, "year": 2021}, {"source": "8", "target": "65", "source_name": "christian rock", "target_name": "country music", "weight": 1.0, "year": 2021}, {"source": "8", "target": "73", "source_name": "christian rock", "target_name": "southern rock", "weight": 1.0, "year": 2021}, {"source": "8", "target": "77", "source_name": "christian rock", "target_name": "rock music", "weight": 2.0, "year": 2021}, {"source": "8", "target": "79", "source_name": "christian rock", "target_name": "popular culture", "weight": 2.0, "year": 2021}, {"source": "8", "target": "80", "source_name": "christian rock", "target_name": "folk music", "weight": 1.0, "year": 2021}, {"source": "9", "target": "10", "source_name": "compact disc", "target_name": "african american", "weight": 1.0, "year": 2021}, {"source": "9", "target": "11", "source_name": "compact disc", "target_name": "south africa", "weight": 1.0, "year": 2021}, {"source": "9", "target": "18", "source_name": "compact disc", "target_name": "middle class", "weight": 1.0, "year": 2021}, {"source": "9", "target": "19", "source_name": "compact disc", "target_name": "music video", "weight": 1.0, "year": 2021}, {"source": "9", "target": "24", "source_name": "compact disc", "target_name": "punk rock", "weight": 1.0, "year": 2021}, {"source": "9", "target": "25", "source_name": "compact disc", "target_name": "russian rock", "weight": 1.0, "year": 2021}, {"source": "9", "target": "28", "source_name": "compact disc", "target_name": "high school", "weight": 1.0, "year": 2021}, {"source": "9", "target": "29", "source_name": "compact disc", "target_name": "rolling stone", "weight": 1.0, "year": 2021}, {"source": "9", "target": "30", "source_name": "compact disc", "target_name": "rock band", "weight": 1.0, "year": 2021}, {"source": "9", "target": "36", "source_name": "compact disc", "target_name": "music industry", "weight": 1.0, "year": 2021}, {"source": "9", "target": "37", "source_name": "compact disc", "target_name": "middle ages", "weight": 1.0, "year": 2021}, {"source": "9", "target": "46", "source_name": "compact disc", "target_name": "music festival", "weight": 1.0, "year": 2021}, {"source": "9", "target": "48", "source_name": "compact disc", "target_name": "pop music", "weight": 1.0, "year": 2021}, {"source": "9", "target": "51", "source_name": "compact disc", "target_name": "cultural identity", "weight": 1.0, "year": 2021}, {"source": "9", "target": "53", "source_name": "compact disc", "target_name": "popular music", "weight": 4.0, "year": 2021}, {"source": "9", "target": "61", "source_name": "compact disc", "target_name": "progressive rock", "weight": 1.0, "year": 2021}, {"source": "9", "target": "66", "source_name": "compact disc", "target_name": "hong kong", "weight": 1.0, "year": 2021}, {"source": "9", "target": "74", "source_name": "compact disc", "target_name": "united states", "weight": 1.0, "year": 2021}, {"source": "9", "target": "77", "source_name": "compact disc", "target_name": "rock music", "weight": 2.0, "year": 2021}, {"source": "9", "target": "78", "source_name": "compact disc", "target_name": "hip hop", "weight": 1.0, "year": 2021}, {"source": "9", "target": "79", "source_name": "compact disc", "target_name": "popular culture", "weight": 1.0, "year": 2021}, {"source": "9", "target": "80", "source_name": "compact disc", "target_name": "folk music", "weight": 3.0, "year": 2021}, {"source": "9", "target": "85", "source_name": "compact disc", "target_name": "jewish music", "weight": 2.0, "year": 2021}, {"source": "9", "target": "89", "source_name": "compact disc", "target_name": "electronic music", "weight": 1.0, "year": 2021}, {"source": "10", "target": "11", "source_name": "african american", "target_name": "south africa", "weight": 1.0, "year": 2021}, {"source": "10", "target": "15", "source_name": "african american", "target_name": "musical theatre", "weight": 1.0, "year": 2021}, {"source": "10", "target": "17", "source_name": "african american", "target_name": "civil rights", "weight": 2.0, "year": 2021}, {"source": "10", "target": "19", "source_name": "african american", "target_name": "music video", "weight": 1.0, "year": 2021}, {"source": "10", "target": "21", "source_name": "african american", "target_name": "social protest", "weight": 1.0, "year": 2021}, {"source": "10", "target": "22", "source_name": "african american", "target_name": "chamber music", "weight": 1.0, "year": 2021}, {"source": "10", "target": "23", "source_name": "african american", "target_name": "electronic dance music", "weight": 1.0, "year": 2021}, {"source": "10", "target": "24", "source_name": "african american", "target_name": "punk rock", "weight": 2.0, "year": 2021}, {"source": "10", "target": "29", "source_name": "african american", "target_name": "rolling stone", "weight": 1.0, "year": 2021}, {"source": "10", "target": "36", "source_name": "african american", "target_name": "music industry", "weight": 4.0, "year": 2021}, {"source": "10", "target": "38", "source_name": "african american", "target_name": "summary additional listening", "weight": 1.0, "year": 2021}, {"source": "10", "target": "40", "source_name": "african american", "target_name": "musical instruments", "weight": 1.0, "year": 2021}, {"source": "10", "target": "52", "source_name": "african american", "target_name": "folk song", "weight": 1.0, "year": 2021}, {"source": "10", "target": "53", "source_name": "african american", "target_name": "popular music", "weight": 7.0, "year": 2021}, {"source": "10", "target": "54", "source_name": "african american", "target_name": "american popular music", "weight": 1.0, "year": 2021}, {"source": "10", "target": "61", "source_name": "african american", "target_name": "progressive rock", "weight": 1.0, "year": 2021}, {"source": "10", "target": "62", "source_name": "african american", "target_name": "led zeppelin", "weight": 1.0, "year": 2021}, {"source": "10", "target": "65", "source_name": "african american", "target_name": "country music", "weight": 1.0, "year": 2021}, {"source": "10", "target": "69", "source_name": "african american", "target_name": "classical music", "weight": 2.0, "year": 2021}, {"source": "10", "target": "72", "source_name": "african american", "target_name": "jimi hendrix", "weight": 1.0, "year": 2021}, {"source": "10", "target": "74", "source_name": "african american", "target_name": "united states", "weight": 6.0, "year": 2021}, {"source": "10", "target": "75", "source_name": "african american", "target_name": "world war ii", "weight": 1.0, "year": 2021}, {"source": "10", "target": "77", "source_name": "african american", "target_name": "rock music", "weight": 2.0, "year": 2021}, {"source": "10", "target": "78", "source_name": "african american", "target_name": "hip hop", "weight": 1.0, "year": 2021}, {"source": "10", "target": "79", "source_name": "african american", "target_name": "popular culture", "weight": 2.0, "year": 2021}, {"source": "10", "target": "80", "source_name": "african american", "target_name": "folk music", "weight": 4.0, "year": 2021}, {"source": "10", "target": "82", "source_name": "african american", "target_name": "heavy metal", "weight": 1.0, "year": 2021}, {"source": "10", "target": "86", "source_name": "african american", "target_name": "south korea", "weight": 1.0, "year": 2021}, {"source": "10", "target": "89", "source_name": "african american", "target_name": "electronic music", "weight": 1.0, "year": 2021}, {"source": "11", "target": "17", "source_name": "south africa", "target_name": "civil rights", "weight": 1.0, "year": 2021}, {"source": "11", "target": "21", "source_name": "south africa", "target_name": "social protest", "weight": 2.0, "year": 2021}, {"source": "11", "target": "23", "source_name": "south africa", "target_name": "electronic dance music", "weight": 1.0, "year": 2021}, {"source": "11", "target": "25", "source_name": "south africa", "target_name": "russian rock", "weight": 1.0, "year": 2021}, {"source": "11", "target": "36", "source_name": "south africa", "target_name": "music industry", "weight": 1.0, "year": 2021}, {"source": "11", "target": "43", "source_name": "south africa", "target_name": "music education", "weight": 1.0, "year": 2021}, {"source": "11", "target": "46", "source_name": "south africa", "target_name": "music festival", "weight": 3.0, "year": 2021}, {"source": "11", "target": "53", "source_name": "south africa", "target_name": "popular music", "weight": 5.0, "year": 2021}, {"source": "11", "target": "61", "source_name": "south africa", "target_name": "progressive rock", "weight": 1.0, "year": 2021}, {"source": "11", "target": "66", "source_name": "south africa", "target_name": "hong kong", "weight": 1.0, "year": 2021}, {"source": "11", "target": "74", "source_name": "south africa", "target_name": "united states", "weight": 3.0, "year": 2021}, {"source": "11", "target": "78", "source_name": "south africa", "target_name": "hip hop", "weight": 1.0, "year": 2021}, {"source": "11", "target": "80", "source_name": "south africa", "target_name": "folk music", "weight": 3.0, "year": 2021}, {"source": "11", "target": "85", "source_name": "south africa", "target_name": "jewish music", "weight": 1.0, "year": 2021}, {"source": "11", "target": "87", "source_name": "south africa", "target_name": "music hall", "weight": 1.0, "year": 2021}, {"source": "11", "target": "88", "source_name": "south africa", "target_name": "oxford university press", "weight": 1.0, "year": 2021}, {"source": "12", "target": "15", "source_name": "rock opera", "target_name": "musical theatre", "weight": 4.0, "year": 2021}, {"source": "12", "target": "25", "source_name": "rock opera", "target_name": "russian rock", "weight": 1.0, "year": 2021}, {"source": "12", "target": "33", "source_name": "rock opera", "target_name": "jesus christ", "weight": 2.0, "year": 2021}, {"source": "12", "target": "41", "source_name": "rock opera", "target_name": "youth culture", "weight": 2.0, "year": 2021}, {"source": "12", "target": "48", "source_name": "rock opera", "target_name": "pop music", "weight": 1.0, "year": 2021}, {"source": "12", "target": "53", "source_name": "rock opera", "target_name": "popular music", "weight": 1.0, "year": 2021}, {"source": "12", "target": "57", "source_name": "rock opera", "target_name": "north america", "weight": 1.0, "year": 2021}, {"source": "12", "target": "77", "source_name": "rock opera", "target_name": "rock music", "weight": 5.0, "year": 2021}, {"source": "12", "target": "79", "source_name": "rock opera", "target_name": "popular culture", "weight": 2.0, "year": 2021}, {"source": "12", "target": "80", "source_name": "rock opera", "target_name": "folk music", "weight": 1.0, "year": 2021}, {"source": "12", "target": "89", "source_name": "rock opera", "target_name": "electronic music", "weight": 1.0, "year": 2021}, {"source": "13", "target": "36", "source_name": "deep learning", "target_name": "music industry", "weight": 1.0, "year": 2021}, {"source": "13", "target": "69", "source_name": "deep learning", "target_name": "classical music", "weight": 1.0, "year": 2021}, {"source": "13", "target": "84", "source_name": "deep learning", "target_name": "artificial intelligence", "weight": 1.0, "year": 2021}, {"source": "15", "target": "33", "source_name": "musical theatre", "target_name": "jesus christ", "weight": 3.0, "year": 2021}, {"source": "15", "target": "53", "source_name": "musical theatre", "target_name": "popular music", "weight": 6.0, "year": 2021}, {"source": "15", "target": "54", "source_name": "musical theatre", "target_name": "american popular music", "weight": 3.0, "year": 2021}, {"source": "15", "target": "57", "source_name": "musical theatre", "target_name": "north america", "weight": 2.0, "year": 2021}, {"source": "15", "target": "65", "source_name": "musical theatre", "target_name": "country music", "weight": 1.0, "year": 2021}, {"source": "15", "target": "70", "source_name": "musical theatre", "target_name": "world war", "weight": 1.0, "year": 2021}, {"source": "15", "target": "74", "source_name": "musical theatre", "target_name": "united states", "weight": 1.0, "year": 2021}, {"source": "15", "target": "77", "source_name": "musical theatre", "target_name": "rock music", "weight": 9.0, "year": 2021}, {"source": "15", "target": "79", "source_name": "musical theatre", "target_name": "popular culture", "weight": 1.0, "year": 2021}, {"source": "15", "target": "87", "source_name": "musical theatre", "target_name": "music hall", "weight": 1.0, "year": 2021}, {"source": "16", "target": "29", "source_name": "bob dylan", "target_name": "rolling stone", "weight": 4.0, "year": 2021}, {"source": "16", "target": "30", "source_name": "bob dylan", "target_name": "rock band", "weight": 2.0, "year": 2021}, {"source": "16", "target": "36", "source_name": "bob dylan", "target_name": "music industry", "weight": 3.0, "year": 2021}, {"source": "16", "target": "42", "source_name": "bob dylan", "target_name": "simon frith", "weight": 1.0, "year": 2021}, {"source": "16", "target": "44", "source_name": "bob dylan", "target_name": "alternative rock", "weight": 1.0, "year": 2021}, {"source": "16", "target": "48", "source_name": "bob dylan", "target_name": "pop music", "weight": 3.0, "year": 2021}, {"source": "16", "target": "52", "source_name": "bob dylan", "target_name": "folk song", "weight": 1.0, "year": 2021}, {"source": "16", "target": "53", "source_name": "bob dylan", "target_name": "popular music", "weight": 10.0, "year": 2021}, {"source": "16", "target": "54", "source_name": "bob dylan", "target_name": "american popular music", "weight": 1.0, "year": 2021}, {"source": "16", "target": "56", "source_name": "bob dylan", "target_name": "bruce springsteen", "weight": 1.0, "year": 2021}, {"source": "16", "target": "69", "source_name": "bob dylan", "target_name": "classical music", "weight": 1.0, "year": 2021}, {"source": "16", "target": "70", "source_name": "bob dylan", "target_name": "world war", "weight": 1.0, "year": 2021}, {"source": "16", "target": "72", "source_name": "bob dylan", "target_name": "jimi hendrix", "weight": 2.0, "year": 2021}, {"source": "16", "target": "75", "source_name": "bob dylan", "target_name": "world war ii", "weight": 1.0, "year": 2021}, {"source": "16", "target": "77", "source_name": "bob dylan", "target_name": "rock music", "weight": 7.0, "year": 2021}, {"source": "16", "target": "79", "source_name": "bob dylan", "target_name": "popular culture", "weight": 3.0, "year": 2021}, {"source": "16", "target": "80", "source_name": "bob dylan", "target_name": "folk music", "weight": 5.0, "year": 2021}, {"source": "17", "target": "21", "source_name": "civil rights", "target_name": "social protest", "weight": 1.0, "year": 2021}, {"source": "17", "target": "24", "source_name": "civil rights", "target_name": "punk rock", "weight": 1.0, "year": 2021}, {"source": "17", "target": "30", "source_name": "civil rights", "target_name": "rock band", "weight": 1.0, "year": 2021}, {"source": "17", "target": "41", "source_name": "civil rights", "target_name": "youth culture", "weight": 1.0, "year": 2021}, {"source": "17", "target": "53", "source_name": "civil rights", "target_name": "popular music", "weight": 4.0, "year": 2021}, {"source": "17", "target": "54", "source_name": "civil rights", "target_name": "american popular music", "weight": 1.0, "year": 2021}, {"source": "17", "target": "61", "source_name": "civil rights", "target_name": "progressive rock", "weight": 1.0, "year": 2021}, {"source": "17", "target": "70", "source_name": "civil rights", "target_name": "world war", "weight": 1.0, "year": 2021}, {"source": "17", "target": "73", "source_name": "civil rights", "target_name": "southern rock", "weight": 1.0, "year": 2021}, {"source": "17", "target": "74", "source_name": "civil rights", "target_name": "united states", "weight": 3.0, "year": 2021}, {"source": "17", "target": "75", "source_name": "civil rights", "target_name": "world war ii", "weight": 1.0, "year": 2021}, {"source": "17", "target": "77", "source_name": "civil rights", "target_name": "rock music", "weight": 3.0, "year": 2021}, {"source": "17", "target": "79", "source_name": "civil rights", "target_name": "popular culture", "weight": 1.0, "year": 2021}, {"source": "17", "target": "80", "source_name": "civil rights", "target_name": "folk music", "weight": 2.0, "year": 2021}, {"source": "18", "target": "19", "source_name": "middle class", "target_name": "music video", "weight": 1.0, "year": 2021}, {"source": "18", "target": "28", "source_name": "middle class", "target_name": "high school", "weight": 1.0, "year": 2021}, {"source": "18", "target": "30", "source_name": "middle class", "target_name": "rock band", "weight": 2.0, "year": 2021}, {"source": "18", "target": "48", "source_name": "middle class", "target_name": "pop music", "weight": 1.0, "year": 2021}, {"source": "18", "target": "53", "source_name": "middle class", "target_name": "popular music", "weight": 2.0, "year": 2021}, {"source": "18", "target": "58", "source_name": "middle class", "target_name": "music therapy", "weight": 1.0, "year": 2021}, {"source": "18", "target": "61", "source_name": "middle class", "target_name": "progressive rock", "weight": 2.0, "year": 2021}, {"source": "18", "target": "75", "source_name": "middle class", "target_name": "world war ii", "weight": 1.0, "year": 2021}, {"source": "18", "target": "77", "source_name": "middle class", "target_name": "rock music", "weight": 2.0, "year": 2021}, {"source": "19", "target": "22", "source_name": "music video", "target_name": "chamber music", "weight": 1.0, "year": 2021}, {"source": "19", "target": "24", "source_name": "music video", "target_name": "punk rock", "weight": 1.0, "year": 2021}, {"source": "19", "target": "28", "source_name": "music video", "target_name": "high school", "weight": 2.0, "year": 2021}, {"source": "19", "target": "30", "source_name": "music video", "target_name": "rock band", "weight": 4.0, "year": 2021}, {"source": "19", "target": "36", "source_name": "music video", "target_name": "music industry", "weight": 2.0, "year": 2021}, {"source": "19", "target": "38", "source_name": "music video", "target_name": "summary additional listening", "weight": 1.0, "year": 2021}, {"source": "19", "target": "40", "source_name": "music video", "target_name": "musical instruments", "weight": 1.0, "year": 2021}, {"source": "19", "target": "47", "source_name": "music video", "target_name": "hard rock", "weight": 1.0, "year": 2021}, {"source": "19", "target": "48", "source_name": "music video", "target_name": "pop music", "weight": 5.0, "year": 2021}, {"source": "19", "target": "49", "source_name": "music video", "target_name": "music theory", "weight": 1.0, "year": 2021}, {"source": "19", "target": "51", "source_name": "music video", "target_name": "cultural identity", "weight": 2.0, "year": 2021}, {"source": "19", "target": "52", "source_name": "music video", "target_name": "folk song", "weight": 1.0, "year": 2021}, {"source": "19", "target": "53", "source_name": "music video", "target_name": "popular music", "weight": 10.0, "year": 2021}, {"source": "19", "target": "54", "source_name": "music video", "target_name": "american popular music", "weight": 1.0, "year": 2021}, {"source": "19", "target": "56", "source_name": "music video", "target_name": "bruce springsteen", "weight": 1.0, "year": 2021}, {"source": "19", "target": "61", "source_name": "music video", "target_name": "progressive rock", "weight": 1.0, "year": 2021}, {"source": "19", "target": "65", "source_name": "music video", "target_name": "country music", "weight": 4.0, "year": 2021}, {"source": "19", "target": "67", "source_name": "music video", "target_name": "rock art", "weight": 1.0, "year": 2021}, {"source": "19", "target": "69", "source_name": "music video", "target_name": "classical music", "weight": 2.0, "year": 2021}, {"source": "19", "target": "72", "source_name": "music video", "target_name": "jimi hendrix", "weight": 1.0, "year": 2021}, {"source": "19", "target": "74", "source_name": "music video", "target_name": "united states", "weight": 3.0, "year": 2021}, {"source": "19", "target": "76", "source_name": "music video", "target_name": "los angeles", "weight": 1.0, "year": 2021}, {"source": "19", "target": "77", "source_name": "music video", "target_name": "rock music", "weight": 11.0, "year": 2021}, {"source": "19", "target": "78", "source_name": "music video", "target_name": "hip hop", "weight": 2.0, "year": 2021}, {"source": "19", "target": "79", "source_name": "music video", "target_name": "popular culture", "weight": 1.0, "year": 2021}, {"source": "19", "target": "80", "source_name": "music video", "target_name": "folk music", "weight": 1.0, "year": 2021}, {"source": "19", "target": "82", "source_name": "music video", "target_name": "heavy metal", "weight": 1.0, "year": 2021}, {"source": "19", "target": "89", "source_name": "music video", "target_name": "electronic music", "weight": 1.0, "year": 2021}, {"source": "19", "target": "90", "source_name": "music video", "target_name": "blues rock", "weight": 1.0, "year": 2021}, {"source": "20", "target": "24", "source_name": "garage rock", "target_name": "punk rock", "weight": 1.0, "year": 2021}, {"source": "20", "target": "27", "source_name": "garage rock", "target_name": "pop rock", "weight": 1.0, "year": 2021}, {"source": "20", "target": "29", "source_name": "garage rock", "target_name": "rolling stone", "weight": 1.0, "year": 2021}, {"source": "20", "target": "30", "source_name": "garage rock", "target_name": "rock band", "weight": 2.0, "year": 2021}, {"source": "20", "target": "43", "source_name": "garage rock", "target_name": "music education", "weight": 1.0, "year": 2021}, {"source": "20", "target": "44", "source_name": "garage rock", "target_name": "alternative rock", "weight": 2.0, "year": 2021}, {"source": "20", "target": "47", "source_name": "garage rock", "target_name": "hard rock", "weight": 1.0, "year": 2021}, {"source": "20", "target": "48", "source_name": "garage rock", "target_name": "pop music", "weight": 1.0, "year": 2021}, {"source": "20", "target": "53", "source_name": "garage rock", "target_name": "popular music", "weight": 5.0, "year": 2021}, {"source": "20", "target": "57", "source_name": "garage rock", "target_name": "north america", "weight": 1.0, "year": 2021}, {"source": "20", "target": "65", "source_name": "garage rock", "target_name": "country music", "weight": 1.0, "year": 2021}, {"source": "20", "target": "73", "source_name": "garage rock", "target_name": "southern rock", "weight": 1.0, "year": 2021}, {"source": "20", "target": "77", "source_name": "garage rock", "target_name": "rock music", "weight": 6.0, "year": 2021}, {"source": "20", "target": "80", "source_name": "garage rock", "target_name": "folk music", "weight": 1.0, "year": 2021}, {"source": "21", "target": "47", "source_name": "social protest", "target_name": "hard rock", "weight": 1.0, "year": 2021}, {"source": "21", "target": "48", "source_name": "social protest", "target_name": "pop music", "weight": 1.0, "year": 2021}, {"source": "21", "target": "53", "source_name": "social protest", "target_name": "popular music", "weight": 5.0, "year": 2021}, {"source": "21", "target": "57", "source_name": "social protest", "target_name": "north america", "weight": 2.0, "year": 2021}, {"source": "21", "target": "61", "source_name": "social protest", "target_name": "progressive rock", "weight": 1.0, "year": 2021}, {"source": "21", "target": "71", "source_name": "social protest", "target_name": "latin american", "weight": 1.0, "year": 2021}, {"source": "21", "target": "74", "source_name": "social protest", "target_name": "united states", "weight": 2.0, "year": 2021}, {"source": "21", "target": "77", "source_name": "social protest", "target_name": "rock music", "weight": 1.0, "year": 2021}, {"source": "21", "target": "80", "source_name": "social protest", "target_name": "folk music", "weight": 2.0, "year": 2021}, {"source": "21", "target": "82", "source_name": "social protest", "target_name": "heavy metal", "weight": 1.0, "year": 2021}, {"source": "21", "target": "87", "source_name": "social protest", "target_name": "music hall", "weight": 1.0, "year": 2021}, {"source": "22", "target": "35", "source_name": "chamber music", "target_name": "ancient greek", "weight": 1.0, "year": 2021}, {"source": "22", "target": "36", "source_name": "chamber music", "target_name": "music industry", "weight": 1.0, "year": 2021}, {"source": "22", "target": "38", "source_name": "chamber music", "target_name": "summary additional listening", "weight": 1.0, "year": 2021}, {"source": "22", "target": "40", "source_name": "chamber music", "target_name": "musical instruments", "weight": 1.0, "year": 2021}, {"source": "22", "target": "43", "source_name": "chamber music", "target_name": "music education", "weight": 1.0, "year": 2021}, {"source": "22", "target": "48", "source_name": "chamber music", "target_name": "pop music", "weight": 1.0, "year": 2021}, {"source": "22", "target": "52", "source_name": "chamber music", "target_name": "folk song", "weight": 1.0, "year": 2021}, {"source": "22", "target": "53", "source_name": "chamber music", "target_name": "popular music", "weight": 2.0, "year": 2021}, {"source": "22", "target": "54", "source_name": "chamber music", "target_name": "american popular music", "weight": 1.0, "year": 2021}, {"source": "22", "target": "65", "source_name": "chamber music", "target_name": "country music", "weight": 2.0, "year": 2021}, {"source": "22", "target": "69", "source_name": "chamber music", "target_name": "classical music", "weight": 4.0, "year": 2021}, {"source": "22", "target": "74", "source_name": "chamber music", "target_name": "united states", "weight": 1.0, "year": 2021}, {"source": "22", "target": "77", "source_name": "chamber music", "target_name": "rock music", "weight": 2.0, "year": 2021}, {"source": "22", "target": "79", "source_name": "chamber music", "target_name": "popular culture", "weight": 1.0, "year": 2021}, {"source": "22", "target": "80", "source_name": "chamber music", "target_name": "folk music", "weight": 2.0, "year": 2021}, {"source": "22", "target": "89", "source_name": "chamber music", "target_name": "electronic music", "weight": 3.0, "year": 2021}, {"source": "23", "target": "24", "source_name": "electronic dance music", "target_name": "punk rock", "weight": 1.0, "year": 2021}, {"source": "23", "target": "36", "source_name": "electronic dance music", "target_name": "music industry", "weight": 2.0, "year": 2021}, {"source": "23", "target": "42", "source_name": "electronic dance music", "target_name": "simon frith", "weight": 2.0, "year": 2021}, {"source": "23", "target": "47", "source_name": "electronic dance music", "target_name": "hard rock", "weight": 1.0, "year": 2021}, {"source": "23", "target": "53", "source_name": "electronic dance music", "target_name": "popular music", "weight": 10.0, "year": 2021}, {"source": "23", "target": "56", "source_name": "electronic dance music", "target_name": "bruce springsteen", "weight": 1.0, "year": 2021}, {"source": "23", "target": "57", "source_name": "electronic dance music", "target_name": "north america", "weight": 1.0, "year": 2021}, {"source": "23", "target": "60", "source_name": "electronic dance music", "target_name": "cultural studies", "weight": 2.0, "year": 2021}, {"source": "23", "target": "67", "source_name": "electronic dance music", "target_name": "rock art", "weight": 1.0, "year": 2021}, {"source": "23", "target": "74", "source_name": "electronic dance music", "target_name": "united states", "weight": 2.0, "year": 2021}, {"source": "23", "target": "76", "source_name": "electronic dance music", "target_name": "los angeles", "weight": 1.0, "year": 2021}, {"source": "23", "target": "77", "source_name": "electronic dance music", "target_name": "rock music", "weight": 1.0, "year": 2021}, {"source": "23", "target": "78", "source_name": "electronic dance music", "target_name": "hip hop", "weight": 1.0, "year": 2021}, {"source": "23", "target": "79", "source_name": "electronic dance music", "target_name": "popular culture", "weight": 1.0, "year": 2021}, {"source": "23", "target": "82", "source_name": "electronic dance music", "target_name": "heavy metal", "weight": 3.0, "year": 2021}, {"source": "23", "target": "88", "source_name": "electronic dance music", "target_name": "oxford university press", "weight": 1.0, "year": 2021}, {"source": "23", "target": "89", "source_name": "electronic dance music", "target_name": "electronic music", "weight": 4.0, "year": 2021}, {"source": "24", "target": "27", "source_name": "punk rock", "target_name": "pop rock", "weight": 1.0, "year": 2021}, {"source": "24", "target": "30", "source_name": "punk rock", "target_name": "rock band", "weight": 1.0, "year": 2021}, {"source": "24", "target": "36", "source_name": "punk rock", "target_name": "music industry", "weight": 1.0, "year": 2021}, {"source": "24", "target": "41", "source_name": "punk rock", "target_name": "youth culture", "weight": 2.0, "year": 2021}, {"source": "24", "target": "42", "source_name": "punk rock", "target_name": "simon frith", "weight": 1.0, "year": 2021}, {"source": "24", "target": "44", "source_name": "punk rock", "target_name": "alternative rock", "weight": 4.0, "year": 2021}, {"source": "24", "target": "47", "source_name": "punk rock", "target_name": "hard rock", "weight": 5.0, "year": 2021}, {"source": "24", "target": "48", "source_name": "punk rock", "target_name": "pop music", "weight": 4.0, "year": 2021}, {"source": "24", "target": "51", "source_name": "punk rock", "target_name": "cultural identity", "weight": 1.0, "year": 2021}, {"source": "24", "target": "53", "source_name": "punk rock", "target_name": "popular music", "weight": 13.0, "year": 2021}, {"source": "24", "target": "57", "source_name": "punk rock", "target_name": "north america", "weight": 1.0, "year": 2021}, {"source": "24", "target": "61", "source_name": "punk rock", "target_name": "progressive rock", "weight": 3.0, "year": 2021}, {"source": "24", "target": "65", "source_name": "punk rock", "target_name": "country music", "weight": 1.0, "year": 2021}, {"source": "24", "target": "69", "source_name": "punk rock", "target_name": "classical music", "weight": 1.0, "year": 2021}, {"source": "24", "target": "74", "source_name": "punk rock", "target_name": "united states", "weight": 3.0, "year": 2021}, {"source": "24", "target": "77", "source_name": "punk rock", "target_name": "rock music", "weight": 12.0, "year": 2021}, {"source": "24", "target": "78", "source_name": "punk rock", "target_name": "hip hop", "weight": 1.0, "year": 2021}, {"source": "24", "target": "79", "source_name": "punk rock", "target_name": "popular culture", "weight": 1.0, "year": 2021}, {"source": "24", "target": "80", "source_name": "punk rock", "target_name": "folk music", "weight": 1.0, "year": 2021}, {"source": "24", "target": "82", "source_name": "punk rock", "target_name": "heavy metal", "weight": 6.0, "year": 2021}, {"source": "25", "target": "30", "source_name": "russian rock", "target_name": "rock band", "weight": 1.0, "year": 2021}, {"source": "25", "target": "37", "source_name": "russian rock", "target_name": "middle ages", "weight": 1.0, "year": 2021}, {"source": "25", "target": "46", "source_name": "russian rock", "target_name": "music festival", "weight": 1.0, "year": 2021}, {"source": "25", "target": "53", "source_name": "russian rock", "target_name": "popular music", "weight": 2.0, "year": 2021}, {"source": "25", "target": "66", "source_name": "russian rock", "target_name": "hong kong", "weight": 1.0, "year": 2021}, {"source": "25", "target": "77", "source_name": "russian rock", "target_name": "rock music", "weight": 6.0, "year": 2021}, {"source": "25", "target": "78", "source_name": "russian rock", "target_name": "hip hop", "weight": 1.0, "year": 2021}, {"source": "25", "target": "80", "source_name": "russian rock", "target_name": "folk music", "weight": 2.0, "year": 2021}, {"source": "25", "target": "82", "source_name": "russian rock", "target_name": "heavy metal", "weight": 1.0, "year": 2021}, {"source": "25", "target": "85", "source_name": "russian rock", "target_name": "jewish music", "weight": 1.0, "year": 2021}, {"source": "26", "target": "43", "source_name": "information technology", "target_name": "music education", "weight": 2.0, "year": 2021}, {"source": "26", "target": "57", "source_name": "information technology", "target_name": "north america", "weight": 1.0, "year": 2021}, {"source": "26", "target": "59", "source_name": "information technology", "target_name": "college students", "weight": 1.0, "year": 2021}, {"source": "26", "target": "89", "source_name": "information technology", "target_name": "electronic music", "weight": 1.0, "year": 2021}, {"source": "27", "target": "44", "source_name": "pop rock", "target_name": "alternative rock", "weight": 1.0, "year": 2021}, {"source": "27", "target": "47", "source_name": "pop rock", "target_name": "hard rock", "weight": 1.0, "year": 2021}, {"source": "27", "target": "48", "source_name": "pop rock", "target_name": "pop music", "weight": 1.0, "year": 2021}, {"source": "27", "target": "53", "source_name": "pop rock", "target_name": "popular music", "weight": 1.0, "year": 2021}, {"source": "27", "target": "64", "source_name": "pop rock", "target_name": "english language", "weight": 1.0, "year": 2021}, {"source": "27", "target": "65", "source_name": "pop rock", "target_name": "country music", "weight": 1.0, "year": 2021}, {"source": "27", "target": "66", "source_name": "pop rock", "target_name": "hong kong", "weight": 1.0, "year": 2021}, {"source": "27", "target": "67", "source_name": "pop rock", "target_name": "rock art", "weight": 1.0, "year": 2021}, {"source": "27", "target": "77", "source_name": "pop rock", "target_name": "rock music", "weight": 1.0, "year": 2021}, {"source": "27", "target": "83", "source_name": "pop rock", "target_name": "folk rock", "weight": 1.0, "year": 2021}, {"source": "28", "target": "30", "source_name": "high school", "target_name": "rock band", "weight": 1.0, "year": 2021}, {"source": "28", "target": "37", "source_name": "high school", "target_name": "middle ages", "weight": 1.0, "year": 2021}, {"source": "28", "target": "43", "source_name": "high school", "target_name": "music education", "weight": 1.0, "year": 2021}, {"source": "28", "target": "48", "source_name": "high school", "target_name": "pop music", "weight": 3.0, "year": 2021}, {"source": "28", "target": "53", "source_name": "high school", "target_name": "popular music", "weight": 1.0, "year": 2021}, {"source": "28", "target": "58", "source_name": "high school", "target_name": "music therapy", "weight": 1.0, "year": 2021}, {"source": "28", "target": "61", "source_name": "high school", "target_name": "progressive rock", "weight": 1.0, "year": 2021}, {"source": "28", "target": "69", "source_name": "high school", "target_name": "classical music", "weight": 1.0, "year": 2021}, {"source": "28", "target": "74", "source_name": "high school", "target_name": "united states", "weight": 1.0, "year": 2021}, {"source": "28", "target": "77", "source_name": "high school", "target_name": "rock music", "weight": 6.0, "year": 2021}, {"source": "28", "target": "82", "source_name": "high school", "target_name": "heavy metal", "weight": 1.0, "year": 2021}, {"source": "29", "target": "30", "source_name": "rolling stone", "target_name": "rock band", "weight": 1.0, "year": 2021}, {"source": "29", "target": "36", "source_name": "rolling stone", "target_name": "music industry", "weight": 2.0, "year": 2021}, {"source": "29", "target": "42", "source_name": "rolling stone", "target_name": "simon frith", "weight": 1.0, "year": 2021}, {"source": "29", "target": "44", "source_name": "rolling stone", "target_name": "alternative rock", "weight": 1.0, "year": 2021}, {"source": "29", "target": "48", "source_name": "rolling stone", "target_name": "pop music", "weight": 4.0, "year": 2021}, {"source": "29", "target": "53", "source_name": "rolling stone", "target_name": "popular music", "weight": 10.0, "year": 2021}, {"source": "29", "target": "54", "source_name": "rolling stone", "target_name": "american popular music", "weight": 2.0, "year": 2021}, {"source": "29", "target": "55", "source_name": "rolling stone", "target_name": "rock criticism", "weight": 4.0, "year": 2021}, {"source": "29", "target": "56", "source_name": "rolling stone", "target_name": "bruce springsteen", "weight": 2.0, "year": 2021}, {"source": "29", "target": "62", "source_name": "rolling stone", "target_name": "led zeppelin", "weight": 2.0, "year": 2021}, {"source": "29", "target": "69", "source_name": "rolling stone", "target_name": "classical music", "weight": 1.0, "year": 2021}, {"source": "29", "target": "72", "source_name": "rolling stone", "target_name": "jimi hendrix", "weight": 3.0, "year": 2021}, {"source": "29", "target": "74", "source_name": "rolling stone", "target_name": "united states", "weight": 2.0, "year": 2021}, {"source": "29", "target": "77", "source_name": "rolling stone", "target_name": "rock music", "weight": 9.0, "year": 2021}, {"source": "29", "target": "79", "source_name": "rolling stone", "target_name": "popular culture", "weight": 3.0, "year": 2021}, {"source": "29", "target": "80", "source_name": "rolling stone", "target_name": "folk music", "weight": 1.0, "year": 2021}, {"source": "29", "target": "87", "source_name": "rolling stone", "target_name": "music hall", "weight": 2.0, "year": 2021}, {"source": "30", "target": "36", "source_name": "rock band", "target_name": "music industry", "weight": 5.0, "year": 2021}, {"source": "30", "target": "37", "source_name": "rock band", "target_name": "middle ages", "weight": 2.0, "year": 2021}, {"source": "30", "target": "40", "source_name": "rock band", "target_name": "musical instruments", "weight": 1.0, "year": 2021}, {"source": "30", "target": "41", "source_name": "rock band", "target_name": "youth culture", "weight": 1.0, "year": 2021}, {"source": "30", "target": "43", "source_name": "rock band", "target_name": "music education", "weight": 6.0, "year": 2021}, {"source": "30", "target": "44", "source_name": "rock band", "target_name": "alternative rock", "weight": 1.0, "year": 2021}, {"source": "30", "target": "47", "source_name": "rock band", "target_name": "hard rock", "weight": 1.0, "year": 2021}, {"source": "30", "target": "48", "source_name": "rock band", "target_name": "pop music", "weight": 3.0, "year": 2021}, {"source": "30", "target": "52", "source_name": "rock band", "target_name": "folk song", "weight": 2.0, "year": 2021}, {"source": "30", "target": "53", "source_name": "rock band", "target_name": "popular music", "weight": 25.0, "year": 2021}, {"source": "30", "target": "54", "source_name": "rock band", "target_name": "american popular music", "weight": 1.0, "year": 2021}, {"source": "30", "target": "55", "source_name": "rock band", "target_name": "rock criticism", "weight": 1.0, "year": 2021}, {"source": "30", "target": "61", "source_name": "rock band", "target_name": "progressive rock", "weight": 11.0, "year": 2021}, {"source": "30", "target": "62", "source_name": "rock band", "target_name": "led zeppelin", "weight": 1.0, "year": 2021}, {"source": "30", "target": "63", "source_name": "rock band", "target_name": "post rock", "weight": 1.0, "year": 2021}, {"source": "30", "target": "65", "source_name": "rock band", "target_name": "country music", "weight": 1.0, "year": 2021}, {"source": "30", "target": "67", "source_name": "rock band", "target_name": "rock art", "weight": 1.0, "year": 2021}, {"source": "30", "target": "69", "source_name": "rock band", "target_name": "classical music", "weight": 5.0, "year": 2021}, {"source": "30", "target": "72", "source_name": "rock band", "target_name": "jimi hendrix", "weight": 2.0, "year": 2021}, {"source": "30", "target": "73", "source_name": "rock band", "target_name": "southern rock", "weight": 2.0, "year": 2021}, {"source": "30", "target": "74", "source_name": "rock band", "target_name": "united states", "weight": 2.0, "year": 2021}, {"source": "30", "target": "76", "source_name": "rock band", "target_name": "los angeles", "weight": 1.0, "year": 2021}, {"source": "30", "target": "77", "source_name": "rock band", "target_name": "rock music", "weight": 41.0, "year": 2021}, {"source": "30", "target": "79", "source_name": "rock band", "target_name": "popular culture", "weight": 2.0, "year": 2021}, {"source": "30", "target": "80", "source_name": "rock band", "target_name": "folk music", "weight": 3.0, "year": 2021}, {"source": "30", "target": "82", "source_name": "rock band", "target_name": "heavy metal", "weight": 4.0, "year": 2021}, {"source": "30", "target": "83", "source_name": "rock band", "target_name": "folk rock", "weight": 1.0, "year": 2021}, {"source": "30", "target": "87", "source_name": "rock band", "target_name": "music hall", "weight": 1.0, "year": 2021}, {"source": "30", "target": "89", "source_name": "rock band", "target_name": "electronic music", "weight": 1.0, "year": 2021}, {"source": "31", "target": "69", "source_name": "post modernism", "target_name": "classical music", "weight": 1.0, "year": 2021}, {"source": "32", "target": "36", "source_name": "higher education", "target_name": "music industry", "weight": 1.0, "year": 2021}, {"source": "32", "target": "43", "source_name": "higher education", "target_name": "music education", "weight": 5.0, "year": 2021}, {"source": "32", "target": "53", "source_name": "higher education", "target_name": "popular music", "weight": 2.0, "year": 2021}, {"source": "32", "target": "60", "source_name": "higher education", "target_name": "cultural studies", "weight": 1.0, "year": 2021}, {"source": "32", "target": "69", "source_name": "higher education", "target_name": "classical music", "weight": 1.0, "year": 2021}, {"source": "33", "target": "53", "source_name": "jesus christ", "target_name": "popular music", "weight": 1.0, "year": 2021}, {"source": "33", "target": "70", "source_name": "jesus christ", "target_name": "world war", "weight": 1.0, "year": 2021}, {"source": "33", "target": "77", "source_name": "jesus christ", "target_name": "rock music", "weight": 4.0, "year": 2021}, {"source": "34", "target": "36", "source_name": "mass media", "target_name": "music industry", "weight": 1.0, "year": 2021}, {"source": "34", "target": "40", "source_name": "mass media", "target_name": "musical instruments", "weight": 1.0, "year": 2021}, {"source": "34", "target": "41", "source_name": "mass media", "target_name": "youth culture", "weight": 1.0, "year": 2021}, {"source": "34", "target": "43", "source_name": "mass media", "target_name": "music education", "weight": 3.0, "year": 2021}, {"source": "34", "target": "46", "source_name": "mass media", "target_name": "music festival", "weight": 1.0, "year": 2021}, {"source": "34", "target": "48", "source_name": "mass media", "target_name": "pop music", "weight": 2.0, "year": 2021}, {"source": "34", "target": "51", "source_name": "mass media", "target_name": "cultural identity", "weight": 1.0, "year": 2021}, {"source": "34", "target": "52", "source_name": "mass media", "target_name": "folk song", "weight": 2.0, "year": 2021}, {"source": "34", "target": "53", "source_name": "mass media", "target_name": "popular music", "weight": 6.0, "year": 2021}, {"source": "34", "target": "60", "source_name": "mass media", "target_name": "cultural studies", "weight": 1.0, "year": 2021}, {"source": "34", "target": "65", "source_name": "mass media", "target_name": "country music", "weight": 1.0, "year": 2021}, {"source": "34", "target": "66", "source_name": "mass media", "target_name": "hong kong", "weight": 1.0, "year": 2021}, {"source": "34", "target": "67", "source_name": "mass media", "target_name": "rock art", "weight": 1.0, "year": 2021}, {"source": "34", "target": "69", "source_name": "mass media", "target_name": "classical music", "weight": 2.0, "year": 2021}, {"source": "34", "target": "77", "source_name": "mass media", "target_name": "rock music", "weight": 4.0, "year": 2021}, {"source": "34", "target": "79", "source_name": "mass media", "target_name": "popular culture", "weight": 2.0, "year": 2021}, {"source": "35", "target": "43", "source_name": "ancient greek", "target_name": "music education", "weight": 1.0, "year": 2021}, {"source": "35", "target": "65", "source_name": "ancient greek", "target_name": "country music", "weight": 1.0, "year": 2021}, {"source": "35", "target": "77", "source_name": "ancient greek", "target_name": "rock music", "weight": 1.0, "year": 2021}, {"source": "35", "target": "80", "source_name": "ancient greek", "target_name": "folk music", "weight": 1.0, "year": 2021}, {"source": "35", "target": "89", "source_name": "ancient greek", "target_name": "electronic music", "weight": 1.0, "year": 2021}, {"source": "36", "target": "38", "source_name": "music industry", "target_name": "summary additional listening", "weight": 1.0, "year": 2021}, {"source": "36", "target": "40", "source_name": "music industry", "target_name": "musical instruments", "weight": 2.0, "year": 2021}, {"source": "36", "target": "41", "source_name": "music industry", "target_name": "youth culture", "weight": 3.0, "year": 2021}, {"source": "36", "target": "42", "source_name": "music industry", "target_name": "simon frith", "weight": 2.0, "year": 2021}, {"source": "36", "target": "43", "source_name": "music industry", "target_name": "music education", "weight": 5.0, "year": 2021}, {"source": "36", "target": "44", "source_name": "music industry", "target_name": "alternative rock", "weight": 1.0, "year": 2021}, {"source": "36", "target": "46", "source_name": "music industry", "target_name": "music festival", "weight": 1.0, "year": 2021}, {"source": "36", "target": "47", "source_name": "music industry", "target_name": "hard rock", "weight": 3.0, "year": 2021}, {"source": "36", "target": "48", "source_name": "music industry", "target_name": "pop music", "weight": 11.0, "year": 2021}, {"source": "36", "target": "49", "source_name": "music industry", "target_name": "music theory", "weight": 1.0, "year": 2021}, {"source": "36", "target": "50", "source_name": "music industry", "target_name": "hollywood film", "weight": 1.0, "year": 2021}, {"source": "36", "target": "51", "source_name": "music industry", "target_name": "cultural identity", "weight": 3.0, "year": 2021}, {"source": "36", "target": "52", "source_name": "music industry", "target_name": "folk song", "weight": 1.0, "year": 2021}, {"source": "36", "target": "53", "source_name": "music industry", "target_name": "popular music", "weight": 41.0, "year": 2021}, {"source": "36", "target": "54", "source_name": "music industry", "target_name": "american popular music", "weight": 3.0, "year": 2021}, {"source": "36", "target": "55", "source_name": "music industry", "target_name": "rock criticism", "weight": 3.0, "year": 2021}, {"source": "36", "target": "56", "source_name": "music industry", "target_name": "bruce springsteen", "weight": 2.0, "year": 2021}, {"source": "36", "target": "58", "source_name": "music industry", "target_name": "music therapy", "weight": 1.0, "year": 2021}, {"source": "36", "target": "60", "source_name": "music industry", "target_name": "cultural studies", "weight": 2.0, "year": 2021}, {"source": "36", "target": "61", "source_name": "music industry", "target_name": "progressive rock", "weight": 3.0, "year": 2021}, {"source": "36", "target": "62", "source_name": "music industry", "target_name": "led zeppelin", "weight": 1.0, "year": 2021}, {"source": "36", "target": "64", "source_name": "music industry", "target_name": "english language", "weight": 1.0, "year": 2021}, {"source": "36", "target": "65", "source_name": "music industry", "target_name": "country music", "weight": 2.0, "year": 2021}, {"source": "36", "target": "66", "source_name": "music industry", "target_name": "hong kong", "weight": 1.0, "year": 2021}, {"source": "36", "target": "67", "source_name": "music industry", "target_name": "rock art", "weight": 1.0, "year": 2021}, {"source": "36", "target": "68", "source_name": "music industry", "target_name": "hearing loss", "weight": 1.0, "year": 2021}, {"source": "36", "target": "69", "source_name": "music industry", "target_name": "classical music", "weight": 7.0, "year": 2021}, {"source": "36", "target": "70", "source_name": "music industry", "target_name": "world war", "weight": 2.0, "year": 2021}, {"source": "36", "target": "72", "source_name": "music industry", "target_name": "jimi hendrix", "weight": 4.0, "year": 2021}, {"source": "36", "target": "74", "source_name": "music industry", "target_name": "united states", "weight": 6.0, "year": 2021}, {"source": "36", "target": "75", "source_name": "music industry", "target_name": "world war ii", "weight": 3.0, "year": 2021}, {"source": "36", "target": "76", "source_name": "music industry", "target_name": "los angeles", "weight": 2.0, "year": 2021}, {"source": "36", "target": "77", "source_name": "music industry", "target_name": "rock music", "weight": 26.0, "year": 2021}, {"source": "36", "target": "78", "source_name": "music industry", "target_name": "hip hop", "weight": 6.0, "year": 2021}, {"source": "36", "target": "79", "source_name": "music industry", "target_name": "popular culture", "weight": 6.0, "year": 2021}, {"source": "36", "target": "80", "source_name": "music industry", "target_name": "folk music", "weight": 6.0, "year": 2021}, {"source": "36", "target": "82", "source_name": "music industry", "target_name": "heavy metal", "weight": 2.0, "year": 2021}, {"source": "36", "target": "83", "source_name": "music industry", "target_name": "folk rock", "weight": 1.0, "year": 2021}, {"source": "36", "target": "84", "source_name": "music industry", "target_name": "artificial intelligence", "weight": 2.0, "year": 2021}, {"source": "36", "target": "86", "source_name": "music industry", "target_name": "south korea", "weight": 2.0, "year": 2021}, {"source": "36", "target": "87", "source_name": "music industry", "target_name": "music hall", "weight": 1.0, "year": 2021}, {"source": "36", "target": "88", "source_name": "music industry", "target_name": "oxford university press", "weight": 2.0, "year": 2021}, {"source": "36", "target": "89", "source_name": "music industry", "target_name": "electronic music", "weight": 5.0, "year": 2021}, {"source": "37", "target": "44", "source_name": "middle ages", "target_name": "alternative rock", "weight": 1.0, "year": 2021}, {"source": "37", "target": "58", "source_name": "middle ages", "target_name": "music therapy", "weight": 1.0, "year": 2021}, {"source": "37", "target": "61", "source_name": "middle ages", "target_name": "progressive rock", "weight": 1.0, "year": 2021}, {"source": "37", "target": "69", "source_name": "middle ages", "target_name": "classical music", "weight": 1.0, "year": 2021}, {"source": "37", "target": "77", "source_name": "middle ages", "target_name": "rock music", "weight": 3.0, "year": 2021}, {"source": "37", "target": "80", "source_name": "middle ages", "target_name": "folk music", "weight": 2.0, "year": 2021}, {"source": "38", "target": "40", "source_name": "summary additional listening", "target_name": "musical instruments", "weight": 1.0, "year": 2021}, {"source": "38", "target": "52", "source_name": "summary additional listening", "target_name": "folk song", "weight": 1.0, "year": 2021}, {"source": "38", "target": "53", "source_name": "summary additional listening", "target_name": "popular music", "weight": 1.0, "year": 2021}, {"source": "38", "target": "54", "source_name": "summary additional listening", "target_name": "american popular music", "weight": 1.0, "year": 2021}, {"source": "38", "target": "65", "source_name": "summary additional listening", "target_name": "country music", "weight": 1.0, "year": 2021}, {"source": "38", "target": "69", "source_name": "summary additional listening", "target_name": "classical music", "weight": 1.0, "year": 2021}, {"source": "38", "target": "74", "source_name": "summary additional listening", "target_name": "united states", "weight": 1.0, "year": 2021}, {"source": "38", "target": "80", "source_name": "summary additional listening", "target_name": "folk music", "weight": 1.0, "year": 2021}, {"source": "38", "target": "89", "source_name": "summary additional listening", "target_name": "electronic music", "weight": 1.0, "year": 2021}, {"source": "40", "target": "43", "source_name": "musical instruments", "target_name": "music education", "weight": 2.0, "year": 2021}, {"source": "40", "target": "48", "source_name": "musical instruments", "target_name": "pop music", "weight": 1.0, "year": 2021}, {"source": "40", "target": "49", "source_name": "musical instruments", "target_name": "music theory", "weight": 1.0, "year": 2021}, {"source": "40", "target": "52", "source_name": "musical instruments", "target_name": "folk song", "weight": 1.0, "year": 2021}, {"source": "40", "target": "53", "source_name": "musical instruments", "target_name": "popular music", "weight": 2.0, "year": 2021}, {"source": "40", "target": "54", "source_name": "musical instruments", "target_name": "american popular music", "weight": 2.0, "year": 2021}, {"source": "40", "target": "65", "source_name": "musical instruments", "target_name": "country music", "weight": 1.0, "year": 2021}, {"source": "40", "target": "69", "source_name": "musical instruments", "target_name": "classical music", "weight": 1.0, "year": 2021}, {"source": "40", "target": "70", "source_name": "musical instruments", "target_name": "world war", "weight": 1.0, "year": 2021}, {"source": "40", "target": "74", "source_name": "musical instruments", "target_name": "united states", "weight": 2.0, "year": 2021}, {"source": "40", "target": "75", "source_name": "musical instruments", "target_name": "world war ii", "weight": 1.0, "year": 2021}, {"source": "40", "target": "77", "source_name": "musical instruments", "target_name": "rock music", "weight": 1.0, "year": 2021}, {"source": "40", "target": "80", "source_name": "musical instruments", "target_name": "folk music", "weight": 1.0, "year": 2021}, {"source": "40", "target": "86", "source_name": "musical instruments", "target_name": "south korea", "weight": 1.0, "year": 2021}, {"source": "40", "target": "89", "source_name": "musical instruments", "target_name": "electronic music", "weight": 3.0, "year": 2021}, {"source": "41", "target": "42", "source_name": "youth culture", "target_name": "simon frith", "weight": 2.0, "year": 2021}, {"source": "41", "target": "46", "source_name": "youth culture", "target_name": "music festival", "weight": 1.0, "year": 2021}, {"source": "41", "target": "47", "source_name": "youth culture", "target_name": "hard rock", "weight": 1.0, "year": 2021}, {"source": "41", "target": "48", "source_name": "youth culture", "target_name": "pop music", "weight": 5.0, "year": 2021}, {"source": "41", "target": "51", "source_name": "youth culture", "target_name": "cultural identity", "weight": 2.0, "year": 2021}, {"source": "41", "target": "53", "source_name": "youth culture", "target_name": "popular music", "weight": 10.0, "year": 2021}, {"source": "41", "target": "57", "source_name": "youth culture", "target_name": "north america", "weight": 1.0, "year": 2021}, {"source": "41", "target": "60", "source_name": "youth culture", "target_name": "cultural studies", "weight": 3.0, "year": 2021}, {"source": "41", "target": "61", "source_name": "youth culture", "target_name": "progressive rock", "weight": 1.0, "year": 2021}, {"source": "41", "target": "66", "source_name": "youth culture", "target_name": "hong kong", "weight": 1.0, "year": 2021}, {"source": "41", "target": "74", "source_name": "youth culture", "target_name": "united states", "weight": 2.0, "year": 2021}, {"source": "41", "target": "75", "source_name": "youth culture", "target_name": "world war ii", "weight": 1.0, "year": 2021}, {"source": "41", "target": "77", "source_name": "youth culture", "target_name": "rock music", "weight": 14.0, "year": 2021}, {"source": "41", "target": "80", "source_name": "youth culture", "target_name": "folk music", "weight": 2.0, "year": 2021}, {"source": "42", "target": "47", "source_name": "simon frith", "target_name": "hard rock", "weight": 1.0, "year": 2021}, {"source": "42", "target": "48", "source_name": "simon frith", "target_name": "pop music", "weight": 6.0, "year": 2021}, {"source": "42", "target": "49", "source_name": "simon frith", "target_name": "music theory", "weight": 1.0, "year": 2021}, {"source": "42", "target": "51", "source_name": "simon frith", "target_name": "cultural identity", "weight": 1.0, "year": 2021}, {"source": "42", "target": "53", "source_name": "simon frith", "target_name": "popular music", "weight": 8.0, "year": 2021}, {"source": "42", "target": "55", "source_name": "simon frith", "target_name": "rock criticism", "weight": 2.0, "year": 2021}, {"source": "42", "target": "56", "source_name": "simon frith", "target_name": "bruce springsteen", "weight": 1.0, "year": 2021}, {"source": "42", "target": "57", "source_name": "simon frith", "target_name": "north america", "weight": 1.0, "year": 2021}, {"source": "42", "target": "60", "source_name": "simon frith", "target_name": "cultural studies", "weight": 4.0, "year": 2021}, {"source": "42", "target": "61", "source_name": "simon frith", "target_name": "progressive rock", "weight": 1.0, "year": 2021}, {"source": "42", "target": "65", "source_name": "simon frith", "target_name": "country music", "weight": 1.0, "year": 2021}, {"source": "42", "target": "72", "source_name": "simon frith", "target_name": "jimi hendrix", "weight": 1.0, "year": 2021}, {"source": "42", "target": "76", "source_name": "simon frith", "target_name": "los angeles", "weight": 1.0, "year": 2021}, {"source": "42", "target": "77", "source_name": "simon frith", "target_name": "rock music", "weight": 6.0, "year": 2021}, {"source": "42", "target": "78", "source_name": "simon frith", "target_name": "hip hop", "weight": 1.0, "year": 2021}, {"source": "42", "target": "79", "source_name": "simon frith", "target_name": "popular culture", "weight": 2.0, "year": 2021}, {"source": "42", "target": "82", "source_name": "simon frith", "target_name": "heavy metal", "weight": 1.0, "year": 2021}, {"source": "42", "target": "88", "source_name": "simon frith", "target_name": "oxford university press", "weight": 1.0, "year": 2021}, {"source": "43", "target": "48", "source_name": "music education", "target_name": "pop music", "weight": 2.0, "year": 2021}, {"source": "43", "target": "49", "source_name": "music education", "target_name": "music theory", "weight": 3.0, "year": 2021}, {"source": "43", "target": "51", "source_name": "music education", "target_name": "cultural identity", "weight": 1.0, "year": 2021}, {"source": "43", "target": "52", "source_name": "music education", "target_name": "folk song", "weight": 1.0, "year": 2021}, {"source": "43", "target": "53", "source_name": "music education", "target_name": "popular music", "weight": 8.0, "year": 2021}, {"source": "43", "target": "57", "source_name": "music education", "target_name": "north america", "weight": 1.0, "year": 2021}, {"source": "43", "target": "59", "source_name": "music education", "target_name": "college students", "weight": 1.0, "year": 2021}, {"source": "43", "target": "60", "source_name": "music education", "target_name": "cultural studies", "weight": 3.0, "year": 2021}, {"source": "43", "target": "66", "source_name": "music education", "target_name": "hong kong", "weight": 1.0, "year": 2021}, {"source": "43", "target": "69", "source_name": "music education", "target_name": "classical music", "weight": 5.0, "year": 2021}, {"source": "43", "target": "74", "source_name": "music education", "target_name": "united states", "weight": 1.0, "year": 2021}, {"source": "43", "target": "77", "source_name": "music education", "target_name": "rock music", "weight": 6.0, "year": 2021}, {"source": "43", "target": "79", "source_name": "music education", "target_name": "popular culture", "weight": 1.0, "year": 2021}, {"source": "43", "target": "80", "source_name": "music education", "target_name": "folk music", "weight": 6.0, "year": 2021}, {"source": "43", "target": "82", "source_name": "music education", "target_name": "heavy metal", "weight": 1.0, "year": 2021}, {"source": "43", "target": "86", "source_name": "music education", "target_name": "south korea", "weight": 1.0, "year": 2021}, {"source": "44", "target": "46", "source_name": "alternative rock", "target_name": "music festival", "weight": 1.0, "year": 2021}, {"source": "44", "target": "47", "source_name": "alternative rock", "target_name": "hard rock", "weight": 3.0, "year": 2021}, {"source": "44", "target": "48", "source_name": "alternative rock", "target_name": "pop music", "weight": 1.0, "year": 2021}, {"source": "44", "target": "51", "source_name": "alternative rock", "target_name": "cultural identity", "weight": 1.0, "year": 2021}, {"source": "44", "target": "53", "source_name": "alternative rock", "target_name": "popular music", "weight": 11.0, "year": 2021}, {"source": "44", "target": "57", "source_name": "alternative rock", "target_name": "north america", "weight": 3.0, "year": 2021}, {"source": "44", "target": "61", "source_name": "alternative rock", "target_name": "progressive rock", "weight": 1.0, "year": 2021}, {"source": "44", "target": "65", "source_name": "alternative rock", "target_name": "country music", "weight": 3.0, "year": 2021}, {"source": "44", "target": "67", "source_name": "alternative rock", "target_name": "rock art", "weight": 1.0, "year": 2021}, {"source": "44", "target": "73", "source_name": "alternative rock", "target_name": "southern rock", "weight": 1.0, "year": 2021}, {"source": "44", "target": "74", "source_name": "alternative rock", "target_name": "united states", "weight": 2.0, "year": 2021}, {"source": "44", "target": "77", "source_name": "alternative rock", "target_name": "rock music", "weight": 8.0, "year": 2021}, {"source": "44", "target": "78", "source_name": "alternative rock", "target_name": "hip hop", "weight": 1.0, "year": 2021}, {"source": "44", "target": "79", "source_name": "alternative rock", "target_name": "popular culture", "weight": 1.0, "year": 2021}, {"source": "44", "target": "80", "source_name": "alternative rock", "target_name": "folk music", "weight": 1.0, "year": 2021}, {"source": "44", "target": "82", "source_name": "alternative rock", "target_name": "heavy metal", "weight": 2.0, "year": 2021}, {"source": "45", "target": "77", "source_name": "double bass", "target_name": "rock music", "weight": 2.0, "year": 2021}, {"source": "46", "target": "47", "source_name": "music festival", "target_name": "hard rock", "weight": 1.0, "year": 2021}, {"source": "46", "target": "48", "source_name": "music festival", "target_name": "pop music", "weight": 2.0, "year": 2021}, {"source": "46", "target": "53", "source_name": "music festival", "target_name": "popular music", "weight": 2.0, "year": 2021}, {"source": "46", "target": "61", "source_name": "music festival", "target_name": "progressive rock", "weight": 1.0, "year": 2021}, {"source": "46", "target": "65", "source_name": "music festival", "target_name": "country music", "weight": 1.0, "year": 2021}, {"source": "46", "target": "66", "source_name": "music festival", "target_name": "hong kong", "weight": 1.0, "year": 2021}, {"source": "46", "target": "69", "source_name": "music festival", "target_name": "classical music", "weight": 3.0, "year": 2021}, {"source": "46", "target": "77", "source_name": "music festival", "target_name": "rock music", "weight": 8.0, "year": 2021}, {"source": "46", "target": "78", "source_name": "music festival", "target_name": "hip hop", "weight": 1.0, "year": 2021}, {"source": "46", "target": "80", "source_name": "music festival", "target_name": "folk music", "weight": 2.0, "year": 2021}, {"source": "46", "target": "82", "source_name": "music festival", "target_name": "heavy metal", "weight": 1.0, "year": 2021}, {"source": "46", "target": "85", "source_name": "music festival", "target_name": "jewish music", "weight": 1.0, "year": 2021}, {"source": "46", "target": "86", "source_name": "music festival", "target_name": "south korea", "weight": 2.0, "year": 2021}, {"source": "47", "target": "48", "source_name": "hard rock", "target_name": "pop music", "weight": 2.0, "year": 2021}, {"source": "47", "target": "51", "source_name": "hard rock", "target_name": "cultural identity", "weight": 1.0, "year": 2021}, {"source": "47", "target": "53", "source_name": "hard rock", "target_name": "popular music", "weight": 5.0, "year": 2021}, {"source": "47", "target": "56", "source_name": "hard rock", "target_name": "bruce springsteen", "weight": 1.0, "year": 2021}, {"source": "47", "target": "57", "source_name": "hard rock", "target_name": "north america", "weight": 1.0, "year": 2021}, {"source": "47", "target": "59", "source_name": "hard rock", "target_name": "college students", "weight": 1.0, "year": 2021}, {"source": "47", "target": "61", "source_name": "hard rock", "target_name": "progressive rock", "weight": 3.0, "year": 2021}, {"source": "47", "target": "65", "source_name": "hard rock", "target_name": "country music", "weight": 2.0, "year": 2021}, {"source": "47", "target": "67", "source_name": "hard rock", "target_name": "rock art", "weight": 1.0, "year": 2021}, {"source": "47", "target": "69", "source_name": "hard rock", "target_name": "classical music", "weight": 2.0, "year": 2021}, {"source": "47", "target": "74", "source_name": "hard rock", "target_name": "united states", "weight": 1.0, "year": 2021}, {"source": "47", "target": "77", "source_name": "hard rock", "target_name": "rock music", "weight": 15.0, "year": 2021}, {"source": "47", "target": "78", "source_name": "hard rock", "target_name": "hip hop", "weight": 1.0, "year": 2021}, {"source": "47", "target": "79", "source_name": "hard rock", "target_name": "popular culture", "weight": 2.0, "year": 2021}, {"source": "47", "target": "82", "source_name": "hard rock", "target_name": "heavy metal", "weight": 10.0, "year": 2021}, {"source": "47", "target": "83", "source_name": "hard rock", "target_name": "folk rock", "weight": 1.0, "year": 2021}, {"source": "47", "target": "89", "source_name": "hard rock", "target_name": "electronic music", "weight": 1.0, "year": 2021}, {"source": "48", "target": "49", "source_name": "pop music", "target_name": "music theory", "weight": 1.0, "year": 2021}, {"source": "48", "target": "51", "source_name": "pop music", "target_name": "cultural identity", "weight": 3.0, "year": 2021}, {"source": "48", "target": "52", "source_name": "pop music", "target_name": "folk song", "weight": 3.0, "year": 2021}, {"source": "48", "target": "53", "source_name": "pop music", "target_name": "popular music", "weight": 48.0, "year": 2021}, {"source": "48", "target": "55", "source_name": "pop music", "target_name": "rock criticism", "weight": 2.0, "year": 2021}, {"source": "48", "target": "57", "source_name": "pop music", "target_name": "north america", "weight": 3.0, "year": 2021}, {"source": "48", "target": "58", "source_name": "pop music", "target_name": "music therapy", "weight": 1.0, "year": 2021}, {"source": "48", "target": "59", "source_name": "pop music", "target_name": "college students", "weight": 3.0, "year": 2021}, {"source": "48", "target": "60", "source_name": "pop music", "target_name": "cultural studies", "weight": 1.0, "year": 2021}, {"source": "48", "target": "62", "source_name": "pop music", "target_name": "led zeppelin", "weight": 2.0, "year": 2021}, {"source": "48", "target": "64", "source_name": "pop music", "target_name": "english language", "weight": 2.0, "year": 2021}, {"source": "48", "target": "65", "source_name": "pop music", "target_name": "country music", "weight": 2.0, "year": 2021}, {"source": "48", "target": "66", "source_name": "pop music", "target_name": "hong kong", "weight": 4.0, "year": 2021}, {"source": "48", "target": "67", "source_name": "pop music", "target_name": "rock art", "weight": 3.0, "year": 2021}, {"source": "48", "target": "69", "source_name": "pop music", "target_name": "classical music", "weight": 10.0, "year": 2021}, {"source": "48", "target": "70", "source_name": "pop music", "target_name": "world war", "weight": 2.0, "year": 2021}, {"source": "48", "target": "71", "source_name": "pop music", "target_name": "latin american", "weight": 1.0, "year": 2021}, {"source": "48", "target": "72", "source_name": "pop music", "target_name": "jimi hendrix", "weight": 3.0, "year": 2021}, {"source": "48", "target": "74", "source_name": "pop music", "target_name": "united states", "weight": 7.0, "year": 2021}, {"source": "48", "target": "76", "source_name": "pop music", "target_name": "los angeles", "weight": 1.0, "year": 2021}, {"source": "48", "target": "77", "source_name": "pop music", "target_name": "rock music", "weight": 44.0, "year": 2021}, {"source": "48", "target": "78", "source_name": "pop music", "target_name": "hip hop", "weight": 4.0, "year": 2021}, {"source": "48", "target": "79", "source_name": "pop music", "target_name": "popular culture", "weight": 6.0, "year": 2021}, {"source": "48", "target": "80", "source_name": "pop music", "target_name": "folk music", "weight": 8.0, "year": 2021}, {"source": "48", "target": "82", "source_name": "pop music", "target_name": "heavy metal", "weight": 2.0, "year": 2021}, {"source": "48", "target": "83", "source_name": "pop music", "target_name": "folk rock", "weight": 2.0, "year": 2021}, {"source": "48", "target": "87", "source_name": "pop music", "target_name": "music hall", "weight": 1.0, "year": 2021}, {"source": "49", "target": "53", "source_name": "music theory", "target_name": "popular music", "weight": 6.0, "year": 2021}, {"source": "49", "target": "54", "source_name": "music theory", "target_name": "american popular music", "weight": 1.0, "year": 2021}, {"source": "49", "target": "55", "source_name": "music theory", "target_name": "rock criticism", "weight": 1.0, "year": 2021}, {"source": "49", "target": "57", "source_name": "music theory", "target_name": "north america", "weight": 2.0, "year": 2021}, {"source": "49", "target": "61", "source_name": "music theory", "target_name": "progressive rock", "weight": 1.0, "year": 2021}, {"source": "49", "target": "69", "source_name": "music theory", "target_name": "classical music", "weight": 1.0, "year": 2021}, {"source": "49", "target": "72", "source_name": "music theory", "target_name": "jimi hendrix", "weight": 1.0, "year": 2021}, {"source": "49", "target": "77", "source_name": "music theory", "target_name": "rock music", "weight": 5.0, "year": 2021}, {"source": "49", "target": "78", "source_name": "music theory", "target_name": "hip hop", "weight": 1.0, "year": 2021}, {"source": "49", "target": "88", "source_name": "music theory", "target_name": "oxford university press", "weight": 2.0, "year": 2021}, {"source": "49", "target": "89", "source_name": "music theory", "target_name": "electronic music", "weight": 1.0, "year": 2021}, {"source": "50", "target": "53", "source_name": "hollywood film", "target_name": "popular music", "weight": 1.0, "year": 2021}, {"source": "50", "target": "60", "source_name": "hollywood film", "target_name": "cultural studies", "weight": 1.0, "year": 2021}, {"source": "50", "target": "79", "source_name": "hollywood film", "target_name": "popular culture", "weight": 1.0, "year": 2021}, {"source": "50", "target": "81", "source_name": "hollywood film", "target_name": "avant garde", "weight": 1.0, "year": 2021}, {"source": "50", "target": "88", "source_name": "hollywood film", "target_name": "oxford university press", "weight": 1.0, "year": 2021}, {"source": "51", "target": "52", "source_name": "cultural identity", "target_name": "folk song", "weight": 1.0, "year": 2021}, {"source": "51", "target": "53", "source_name": "cultural identity", "target_name": "popular music", "weight": 3.0, "year": 2021}, {"source": "51", "target": "60", "source_name": "cultural identity", "target_name": "cultural studies", "weight": 2.0, "year": 2021}, {"source": "51", "target": "65", "source_name": "cultural identity", "target_name": "country music", "weight": 1.0, "year": 2021}, {"source": "51", "target": "66", "source_name": "cultural identity", "target_name": "hong kong", "weight": 1.0, "year": 2021}, {"source": "51", "target": "72", "source_name": "cultural identity", "target_name": "jimi hendrix", "weight": 2.0, "year": 2021}, {"source": "51", "target": "74", "source_name": "cultural identity", "target_name": "united states", "weight": 2.0, "year": 2021}, {"source": "51", "target": "77", "source_name": "cultural identity", "target_name": "rock music", "weight": 7.0, "year": 2021}, {"source": "51", "target": "78", "source_name": "cultural identity", "target_name": "hip hop", "weight": 1.0, "year": 2021}, {"source": "51", "target": "79", "source_name": "cultural identity", "target_name": "popular culture", "weight": 2.0, "year": 2021}, {"source": "51", "target": "80", "source_name": "cultural identity", "target_name": "folk music", "weight": 1.0, "year": 2021}, {"source": "51", "target": "82", "source_name": "cultural identity", "target_name": "heavy metal", "weight": 1.0, "year": 2021}, {"source": "52", "target": "53", "source_name": "folk song", "target_name": "popular music", "weight": 11.0, "year": 2021}, {"source": "52", "target": "54", "source_name": "folk song", "target_name": "american popular music", "weight": 2.0, "year": 2021}, {"source": "52", "target": "65", "source_name": "folk song", "target_name": "country music", "weight": 2.0, "year": 2021}, {"source": "52", "target": "66", "source_name": "folk song", "target_name": "hong kong", "weight": 1.0, "year": 2021}, {"source": "52", "target": "69", "source_name": "folk song", "target_name": "classical music", "weight": 2.0, "year": 2021}, {"source": "52", "target": "74", "source_name": "folk song", "target_name": "united states", "weight": 1.0, "year": 2021}, {"source": "52", "target": "77", "source_name": "folk song", "target_name": "rock music", "weight": 4.0, "year": 2021}, {"source": "52", "target": "80", "source_name": "folk song", "target_name": "folk music", "weight": 9.0, "year": 2021}, {"source": "52", "target": "87", "source_name": "folk song", "target_name": "music hall", "weight": 1.0, "year": 2021}, {"source": "52", "target": "89", "source_name": "folk song", "target_name": "electronic music", "weight": 1.0, "year": 2021}, {"source": "53", "target": "54", "source_name": "popular music", "target_name": "american popular music", "weight": 20.0, "year": 2021}, {"source": "53", "target": "55", "source_name": "popular music", "target_name": "rock criticism", "weight": 7.0, "year": 2021}, {"source": "53", "target": "56", "source_name": "popular music", "target_name": "bruce springsteen", "weight": 3.0, "year": 2021}, {"source": "53", "target": "57", "source_name": "popular music", "target_name": "north america", "weight": 9.0, "year": 2021}, {"source": "53", "target": "58", "source_name": "popular music", "target_name": "music therapy", "weight": 2.0, "year": 2021}, {"source": "53", "target": "59", "source_name": "popular music", "target_name": "college students", "weight": 3.0, "year": 2021}, {"source": "53", "target": "60", "source_name": "popular music", "target_name": "cultural studies", "weight": 10.0, "year": 2021}, {"source": "53", "target": "61", "source_name": "popular music", "target_name": "progressive rock", "weight": 16.0, "year": 2021}, {"source": "53", "target": "62", "source_name": "popular music", "target_name": "led zeppelin", "weight": 3.0, "year": 2021}, {"source": "53", "target": "64", "source_name": "popular music", "target_name": "english language", "weight": 2.0, "year": 2021}, {"source": "53", "target": "65", "source_name": "popular music", "target_name": "country music", "weight": 11.0, "year": 2021}, {"source": "53", "target": "66", "source_name": "popular music", "target_name": "hong kong", "weight": 4.0, "year": 2021}, {"source": "53", "target": "67", "source_name": "popular music", "target_name": "rock art", "weight": 9.0, "year": 2021}, {"source": "53", "target": "69", "source_name": "popular music", "target_name": "classical music", "weight": 20.0, "year": 2021}, {"source": "53", "target": "70", "source_name": "popular music", "target_name": "world war", "weight": 6.0, "year": 2021}, {"source": "53", "target": "71", "source_name": "popular music", "target_name": "latin american", "weight": 3.0, "year": 2021}, {"source": "53", "target": "72", "source_name": "popular music", "target_name": "jimi hendrix", "weight": 5.0, "year": 2021}, {"source": "53", "target": "73", "source_name": "popular music", "target_name": "southern rock", "weight": 2.0, "year": 2021}, {"source": "53", "target": "74", "source_name": "popular music", "target_name": "united states", "weight": 26.0, "year": 2021}, {"source": "53", "target": "75", "source_name": "popular music", "target_name": "world war ii", "weight": 4.0, "year": 2021}, {"source": "53", "target": "76", "source_name": "popular music", "target_name": "los angeles", "weight": 6.0, "year": 2021}, {"source": "53", "target": "77", "source_name": "popular music", "target_name": "rock music", "weight": 156.0, "year": 2021}, {"source": "53", "target": "78", "source_name": "popular music", "target_name": "hip hop", "weight": 13.0, "year": 2021}, {"source": "53", "target": "79", "source_name": "popular music", "target_name": "popular culture", "weight": 30.0, "year": 2021}, {"source": "53", "target": "80", "source_name": "popular music", "target_name": "folk music", "weight": 23.0, "year": 2021}, {"source": "53", "target": "82", "source_name": "popular music", "target_name": "heavy metal", "weight": 15.0, "year": 2021}, {"source": "53", "target": "83", "source_name": "popular music", "target_name": "folk rock", "weight": 3.0, "year": 2021}, {"source": "53", "target": "85", "source_name": "popular music", "target_name": "jewish music", "weight": 2.0, "year": 2021}, {"source": "53", "target": "87", "source_name": "popular music", "target_name": "music hall", "weight": 5.0, "year": 2021}, {"source": "53", "target": "88", "source_name": "popular music", "target_name": "oxford university press", "weight": 4.0, "year": 2021}, {"source": "53", "target": "89", "source_name": "popular music", "target_name": "electronic music", "weight": 11.0, "year": 2021}, {"source": "53", "target": "90", "source_name": "popular music", "target_name": "blues rock", "weight": 1.0, "year": 2021}, {"source": "54", "target": "55", "source_name": "american popular music", "target_name": "rock criticism", "weight": 1.0, "year": 2021}, {"source": "54", "target": "57", "source_name": "american popular music", "target_name": "north america", "weight": 2.0, "year": 2021}, {"source": "54", "target": "65", "source_name": "american popular music", "target_name": "country music", "weight": 5.0, "year": 2021}, {"source": "54", "target": "69", "source_name": "american popular music", "target_name": "classical music", "weight": 3.0, "year": 2021}, {"source": "54", "target": "70", "source_name": "american popular music", "target_name": "world war", "weight": 1.0, "year": 2021}, {"source": "54", "target": "71", "source_name": "american popular music", "target_name": "latin american", "weight": 1.0, "year": 2021}, {"source": "54", "target": "74", "source_name": "american popular music", "target_name": "united states", "weight": 5.0, "year": 2021}, {"source": "54", "target": "75", "source_name": "american popular music", "target_name": "world war ii", "weight": 1.0, "year": 2021}, {"source": "54", "target": "76", "source_name": "american popular music", "target_name": "los angeles", "weight": 1.0, "year": 2021}, {"source": "54", "target": "77", "source_name": "american popular music", "target_name": "rock music", "weight": 7.0, "year": 2021}, {"source": "54", "target": "78", "source_name": "american popular music", "target_name": "hip hop", "weight": 2.0, "year": 2021}, {"source": "54", "target": "79", "source_name": "american popular music", "target_name": "popular culture", "weight": 1.0, "year": 2021}, {"source": "54", "target": "80", "source_name": "american popular music", "target_name": "folk music", "weight": 1.0, "year": 2021}, {"source": "54", "target": "88", "source_name": "american popular music", "target_name": "oxford university press", "weight": 1.0, "year": 2021}, {"source": "54", "target": "89", "source_name": "american popular music", "target_name": "electronic music", "weight": 1.0, "year": 2021}, {"source": "55", "target": "56", "source_name": "rock criticism", "target_name": "bruce springsteen", "weight": 1.0, "year": 2021}, {"source": "55", "target": "57", "source_name": "rock criticism", "target_name": "north america", "weight": 1.0, "year": 2021}, {"source": "55", "target": "61", "source_name": "rock criticism", "target_name": "progressive rock", "weight": 3.0, "year": 2021}, {"source": "55", "target": "62", "source_name": "rock criticism", "target_name": "led zeppelin", "weight": 1.0, "year": 2021}, {"source": "55", "target": "65", "source_name": "rock criticism", "target_name": "country music", "weight": 1.0, "year": 2021}, {"source": "55", "target": "69", "source_name": "rock criticism", "target_name": "classical music", "weight": 1.0, "year": 2021}, {"source": "55", "target": "74", "source_name": "rock criticism", "target_name": "united states", "weight": 2.0, "year": 2021}, {"source": "55", "target": "77", "source_name": "rock criticism", "target_name": "rock music", "weight": 5.0, "year": 2021}, {"source": "55", "target": "78", "source_name": "rock criticism", "target_name": "hip hop", "weight": 1.0, "year": 2021}, {"source": "55", "target": "79", "source_name": "rock criticism", "target_name": "popular culture", "weight": 1.0, "year": 2021}, {"source": "55", "target": "82", "source_name": "rock criticism", "target_name": "heavy metal", "weight": 1.0, "year": 2021}, {"source": "55", "target": "88", "source_name": "rock criticism", "target_name": "oxford university press", "weight": 1.0, "year": 2021}, {"source": "56", "target": "67", "source_name": "bruce springsteen", "target_name": "rock art", "weight": 1.0, "year": 2021}, {"source": "56", "target": "72", "source_name": "bruce springsteen", "target_name": "jimi hendrix", "weight": 1.0, "year": 2021}, {"source": "56", "target": "77", "source_name": "bruce springsteen", "target_name": "rock music", "weight": 3.0, "year": 2021}, {"source": "56", "target": "78", "source_name": "bruce springsteen", "target_name": "hip hop", "weight": 1.0, "year": 2021}, {"source": "56", "target": "79", "source_name": "bruce springsteen", "target_name": "popular culture", "weight": 2.0, "year": 2021}, {"source": "56", "target": "82", "source_name": "bruce springsteen", "target_name": "heavy metal", "weight": 1.0, "year": 2021}, {"source": "57", "target": "61", "source_name": "north america", "target_name": "progressive rock", "weight": 1.0, "year": 2021}, {"source": "57", "target": "65", "source_name": "north america", "target_name": "country music", "weight": 2.0, "year": 2021}, {"source": "57", "target": "71", "source_name": "north america", "target_name": "latin american", "weight": 1.0, "year": 2021}, {"source": "57", "target": "73", "source_name": "north america", "target_name": "southern rock", "weight": 1.0, "year": 2021}, {"source": "57", "target": "74", "source_name": "north america", "target_name": "united states", "weight": 3.0, "year": 2021}, {"source": "57", "target": "77", "source_name": "north america", "target_name": "rock music", "weight": 8.0, "year": 2021}, {"source": "57", "target": "78", "source_name": "north america", "target_name": "hip hop", "weight": 1.0, "year": 2021}, {"source": "57", "target": "80", "source_name": "north america", "target_name": "folk music", "weight": 2.0, "year": 2021}, {"source": "57", "target": "82", "source_name": "north america", "target_name": "heavy metal", "weight": 1.0, "year": 2021}, {"source": "58", "target": "64", "source_name": "music therapy", "target_name": "english language", "weight": 1.0, "year": 2021}, {"source": "58", "target": "69", "source_name": "music therapy", "target_name": "classical music", "weight": 1.0, "year": 2021}, {"source": "58", "target": "74", "source_name": "music therapy", "target_name": "united states", "weight": 1.0, "year": 2021}, {"source": "58", "target": "75", "source_name": "music therapy", "target_name": "world war ii", "weight": 1.0, "year": 2021}, {"source": "58", "target": "77", "source_name": "music therapy", "target_name": "rock music", "weight": 3.0, "year": 2021}, {"source": "59", "target": "69", "source_name": "college students", "target_name": "classical music", "weight": 1.0, "year": 2021}, {"source": "59", "target": "74", "source_name": "college students", "target_name": "united states", "weight": 1.0, "year": 2021}, {"source": "59", "target": "77", "source_name": "college students", "target_name": "rock music", "weight": 5.0, "year": 2021}, {"source": "59", "target": "82", "source_name": "college students", "target_name": "heavy metal", "weight": 2.0, "year": 2021}, {"source": "60", "target": "61", "source_name": "cultural studies", "target_name": "progressive rock", "weight": 1.0, "year": 2021}, {"source": "60", "target": "62", "source_name": "cultural studies", "target_name": "led zeppelin", "weight": 1.0, "year": 2021}, {"source": "60", "target": "71", "source_name": "cultural studies", "target_name": "latin american", "weight": 1.0, "year": 2021}, {"source": "60", "target": "74", "source_name": "cultural studies", "target_name": "united states", "weight": 1.0, "year": 2021}, {"source": "60", "target": "76", "source_name": "cultural studies", "target_name": "los angeles", "weight": 1.0, "year": 2021}, {"source": "60", "target": "77", "source_name": "cultural studies", "target_name": "rock music", "weight": 9.0, "year": 2021}, {"source": "60", "target": "79", "source_name": "cultural studies", "target_name": "popular culture", "weight": 6.0, "year": 2021}, {"source": "60", "target": "80", "source_name": "cultural studies", "target_name": "folk music", "weight": 2.0, "year": 2021}, {"source": "60", "target": "81", "source_name": "cultural studies", "target_name": "avant garde", "weight": 1.0, "year": 2021}, {"source": "60", "target": "85", "source_name": "cultural studies", "target_name": "jewish music", "weight": 1.0, "year": 2021}, {"source": "60", "target": "87", "source_name": "cultural studies", "target_name": "music hall", "weight": 1.0, "year": 2021}, {"source": "60", "target": "88", "source_name": "cultural studies", "target_name": "oxford university press", "weight": 4.0, "year": 2021}, {"source": "60", "target": "89", "source_name": "cultural studies", "target_name": "electronic music", "weight": 1.0, "year": 2021}, {"source": "61", "target": "62", "source_name": "progressive rock", "target_name": "led zeppelin", "weight": 1.0, "year": 2021}, {"source": "61", "target": "67", "source_name": "progressive rock", "target_name": "rock art", "weight": 1.0, "year": 2021}, {"source": "61", "target": "69", "source_name": "progressive rock", "target_name": "classical music", "weight": 4.0, "year": 2021}, {"source": "61", "target": "72", "source_name": "progressive rock", "target_name": "jimi hendrix", "weight": 1.0, "year": 2021}, {"source": "61", "target": "74", "source_name": "progressive rock", "target_name": "united states", "weight": 3.0, "year": 2021}, {"source": "61", "target": "77", "source_name": "progressive rock", "target_name": "rock music", "weight": 26.0, "year": 2021}, {"source": "61", "target": "80", "source_name": "progressive rock", "target_name": "folk music", "weight": 4.0, "year": 2021}, {"source": "61", "target": "82", "source_name": "progressive rock", "target_name": "heavy metal", "weight": 3.0, "year": 2021}, {"source": "61", "target": "83", "source_name": "progressive rock", "target_name": "folk rock", "weight": 1.0, "year": 2021}, {"source": "61", "target": "88", "source_name": "progressive rock", "target_name": "oxford university press", "weight": 2.0, "year": 2021}, {"source": "61", "target": "89", "source_name": "progressive rock", "target_name": "electronic music", "weight": 1.0, "year": 2021}, {"source": "62", "target": "67", "source_name": "led zeppelin", "target_name": "rock art", "weight": 1.0, "year": 2021}, {"source": "62", "target": "69", "source_name": "led zeppelin", "target_name": "classical music", "weight": 2.0, "year": 2021}, {"source": "62", "target": "72", "source_name": "led zeppelin", "target_name": "jimi hendrix", "weight": 2.0, "year": 2021}, {"source": "62", "target": "74", "source_name": "led zeppelin", "target_name": "united states", "weight": 1.0, "year": 2021}, {"source": "62", "target": "77", "source_name": "led zeppelin", "target_name": "rock music", "weight": 4.0, "year": 2021}, {"source": "62", "target": "78", "source_name": "led zeppelin", "target_name": "hip hop", "weight": 1.0, "year": 2021}, {"source": "62", "target": "80", "source_name": "led zeppelin", "target_name": "folk music", "weight": 1.0, "year": 2021}, {"source": "62", "target": "82", "source_name": "led zeppelin", "target_name": "heavy metal", "weight": 2.0, "year": 2021}, {"source": "62", "target": "88", "source_name": "led zeppelin", "target_name": "oxford university press", "weight": 1.0, "year": 2021}, {"source": "63", "target": "77", "source_name": "post rock", "target_name": "rock music", "weight": 1.0, "year": 2021}, {"source": "64", "target": "66", "source_name": "english language", "target_name": "hong kong", "weight": 1.0, "year": 2021}, {"source": "64", "target": "67", "source_name": "english language", "target_name": "rock art", "weight": 1.0, "year": 2021}, {"source": "64", "target": "70", "source_name": "english language", "target_name": "world war", "weight": 1.0, "year": 2021}, {"source": "64", "target": "74", "source_name": "english language", "target_name": "united states", "weight": 2.0, "year": 2021}, {"source": "64", "target": "77", "source_name": "english language", "target_name": "rock music", "weight": 2.0, "year": 2021}, {"source": "64", "target": "79", "source_name": "english language", "target_name": "popular culture", "weight": 1.0, "year": 2021}, {"source": "64", "target": "83", "source_name": "english language", "target_name": "folk rock", "weight": 1.0, "year": 2021}, {"source": "65", "target": "69", "source_name": "country music", "target_name": "classical music", "weight": 4.0, "year": 2021}, {"source": "65", "target": "72", "source_name": "country music", "target_name": "jimi hendrix", "weight": 1.0, "year": 2021}, {"source": "65", "target": "73", "source_name": "country music", "target_name": "southern rock", "weight": 2.0, "year": 2021}, {"source": "65", "target": "74", "source_name": "country music", "target_name": "united states", "weight": 3.0, "year": 2021}, {"source": "65", "target": "77", "source_name": "country music", "target_name": "rock music", "weight": 5.0, "year": 2021}, {"source": "65", "target": "78", "source_name": "country music", "target_name": "hip hop", "weight": 1.0, "year": 2021}, {"source": "65", "target": "79", "source_name": "country music", "target_name": "popular culture", "weight": 2.0, "year": 2021}, {"source": "65", "target": "80", "source_name": "country music", "target_name": "folk music", "weight": 4.0, "year": 2021}, {"source": "65", "target": "82", "source_name": "country music", "target_name": "heavy metal", "weight": 2.0, "year": 2021}, {"source": "65", "target": "89", "source_name": "country music", "target_name": "electronic music", "weight": 2.0, "year": 2021}, {"source": "66", "target": "67", "source_name": "hong kong", "target_name": "rock art", "weight": 1.0, "year": 2021}, {"source": "66", "target": "77", "source_name": "hong kong", "target_name": "rock music", "weight": 2.0, "year": 2021}, {"source": "66", "target": "78", "source_name": "hong kong", "target_name": "hip hop", "weight": 1.0, "year": 2021}, {"source": "66", "target": "80", "source_name": "hong kong", "target_name": "folk music", "weight": 1.0, "year": 2021}, {"source": "66", "target": "83", "source_name": "hong kong", "target_name": "folk rock", "weight": 1.0, "year": 2021}, {"source": "66", "target": "85", "source_name": "hong kong", "target_name": "jewish music", "weight": 1.0, "year": 2021}, {"source": "67", "target": "69", "source_name": "rock art", "target_name": "classical music", "weight": 1.0, "year": 2021}, {"source": "67", "target": "74", "source_name": "rock art", "target_name": "united states", "weight": 1.0, "year": 2021}, {"source": "67", "target": "77", "source_name": "rock art", "target_name": "rock music", "weight": 11.0, "year": 2021}, {"source": "67", "target": "79", "source_name": "rock art", "target_name": "popular culture", "weight": 1.0, "year": 2021}, {"source": "67", "target": "80", "source_name": "rock art", "target_name": "folk music", "weight": 1.0, "year": 2021}, {"source": "67", "target": "82", "source_name": "rock art", "target_name": "heavy metal", "weight": 1.0, "year": 2021}, {"source": "67", "target": "83", "source_name": "rock art", "target_name": "folk rock", "weight": 1.0, "year": 2021}, {"source": "67", "target": "89", "source_name": "rock art", "target_name": "electronic music", "weight": 1.0, "year": 2021}, {"source": "68", "target": "69", "source_name": "hearing loss", "target_name": "classical music", "weight": 1.0, "year": 2021}, {"source": "68", "target": "77", "source_name": "hearing loss", "target_name": "rock music", "weight": 4.0, "year": 2021}, {"source": "69", "target": "70", "source_name": "classical music", "target_name": "world war", "weight": 2.0, "year": 2021}, {"source": "69", "target": "71", "source_name": "classical music", "target_name": "latin american", "weight": 1.0, "year": 2021}, {"source": "69", "target": "72", "source_name": "classical music", "target_name": "jimi hendrix", "weight": 2.0, "year": 2021}, {"source": "69", "target": "74", "source_name": "classical music", "target_name": "united states", "weight": 6.0, "year": 2021}, {"source": "69", "target": "75", "source_name": "classical music", "target_name": "world war ii", "weight": 1.0, "year": 2021}, {"source": "69", "target": "76", "source_name": "classical music", "target_name": "los angeles", "weight": 1.0, "year": 2021}, {"source": "69", "target": "77", "source_name": "classical music", "target_name": "rock music", "weight": 46.0, "year": 2021}, {"source": "69", "target": "78", "source_name": "classical music", "target_name": "hip hop", "weight": 2.0, "year": 2021}, {"source": "69", "target": "79", "source_name": "classical music", "target_name": "popular culture", "weight": 4.0, "year": 2021}, {"source": "69", "target": "80", "source_name": "classical music", "target_name": "folk music", "weight": 6.0, "year": 2021}, {"source": "69", "target": "82", "source_name": "classical music", "target_name": "heavy metal", "weight": 4.0, "year": 2021}, {"source": "69", "target": "87", "source_name": "classical music", "target_name": "music hall", "weight": 2.0, "year": 2021}, {"source": "69", "target": "88", "source_name": "classical music", "target_name": "oxford university press", "weight": 1.0, "year": 2021}, {"source": "69", "target": "89", "source_name": "classical music", "target_name": "electronic music", "weight": 4.0, "year": 2021}, {"source": "70", "target": "74", "source_name": "world war", "target_name": "united states", "weight": 2.0, "year": 2021}, {"source": "70", "target": "75", "source_name": "world war", "target_name": "world war ii", "weight": 6.0, "year": 2021}, {"source": "70", "target": "77", "source_name": "world war", "target_name": "rock music", "weight": 6.0, "year": 2021}, {"source": "70", "target": "79", "source_name": "world war", "target_name": "popular culture", "weight": 1.0, "year": 2021}, {"source": "70", "target": "80", "source_name": "world war", "target_name": "folk music", "weight": 1.0, "year": 2021}, {"source": "70", "target": "87", "source_name": "world war", "target_name": "music hall", "weight": 1.0, "year": 2021}, {"source": "70", "target": "89", "source_name": "world war", "target_name": "electronic music", "weight": 1.0, "year": 2021}, {"source": "71", "target": "74", "source_name": "latin american", "target_name": "united states", "weight": 4.0, "year": 2021}, {"source": "71", "target": "76", "source_name": "latin american", "target_name": "los angeles", "weight": 2.0, "year": 2021}, {"source": "71", "target": "77", "source_name": "latin american", "target_name": "rock music", "weight": 5.0, "year": 2021}, {"source": "71", "target": "79", "source_name": "latin american", "target_name": "popular culture", "weight": 1.0, "year": 2021}, {"source": "72", "target": "74", "source_name": "jimi hendrix", "target_name": "united states", "weight": 2.0, "year": 2021}, {"source": "72", "target": "77", "source_name": "jimi hendrix", "target_name": "rock music", "weight": 8.0, "year": 2021}, {"source": "72", "target": "79", "source_name": "jimi hendrix", "target_name": "popular culture", "weight": 2.0, "year": 2021}, {"source": "72", "target": "80", "source_name": "jimi hendrix", "target_name": "folk music", "weight": 1.0, "year": 2021}, {"source": "72", "target": "89", "source_name": "jimi hendrix", "target_name": "electronic music", "weight": 1.0, "year": 2021}, {"source": "73", "target": "77", "source_name": "southern rock", "target_name": "rock music", "weight": 1.0, "year": 2021}, {"source": "73", "target": "80", "source_name": "southern rock", "target_name": "folk music", "weight": 1.0, "year": 2021}, {"source": "74", "target": "76", "source_name": "united states", "target_name": "los angeles", "weight": 1.0, "year": 2021}, {"source": "74", "target": "77", "source_name": "united states", "target_name": "rock music", "weight": 19.0, "year": 2021}, {"source": "74", "target": "78", "source_name": "united states", "target_name": "hip hop", "weight": 2.0, "year": 2021}, {"source": "74", "target": "79", "source_name": "united states", "target_name": "popular culture", "weight": 3.0, "year": 2021}, {"source": "74", "target": "80", "source_name": "united states", "target_name": "folk music", "weight": 5.0, "year": 2021}, {"source": "74", "target": "88", "source_name": "united states", "target_name": "oxford university press", "weight": 1.0, "year": 2021}, {"source": "74", "target": "89", "source_name": "united states", "target_name": "electronic music", "weight": 3.0, "year": 2021}, {"source": "75", "target": "76", "source_name": "world war ii", "target_name": "los angeles", "weight": 1.0, "year": 2021}, {"source": "75", "target": "77", "source_name": "world war ii", "target_name": "rock music", "weight": 3.0, "year": 2021}, {"source": "75", "target": "80", "source_name": "world war ii", "target_name": "folk music", "weight": 1.0, "year": 2021}, {"source": "76", "target": "77", "source_name": "los angeles", "target_name": "rock music", "weight": 8.0, "year": 2021}, {"source": "76", "target": "79", "source_name": "los angeles", "target_name": "popular culture", "weight": 1.0, "year": 2021}, {"source": "76", "target": "80", "source_name": "los angeles", "target_name": "folk music", "weight": 2.0, "year": 2021}, {"source": "77", "target": "78", "source_name": "rock music", "target_name": "hip hop", "weight": 6.0, "year": 2021}, {"source": "77", "target": "79", "source_name": "rock music", "target_name": "popular culture", "weight": 26.0, "year": 2021}, {"source": "77", "target": "80", "source_name": "rock music", "target_name": "folk music", "weight": 17.0, "year": 2021}, {"source": "77", "target": "82", "source_name": "rock music", "target_name": "heavy metal", "weight": 22.0, "year": 2021}, {"source": "77", "target": "83", "source_name": "rock music", "target_name": "folk rock", "weight": 3.0, "year": 2021}, {"source": "77", "target": "87", "source_name": "rock music", "target_name": "music hall", "weight": 5.0, "year": 2021}, {"source": "77", "target": "88", "source_name": "rock music", "target_name": "oxford university press", "weight": 3.0, "year": 2021}, {"source": "77", "target": "89", "source_name": "rock music", "target_name": "electronic music", "weight": 6.0, "year": 2021}, {"source": "77", "target": "90", "source_name": "rock music", "target_name": "blues rock", "weight": 7.0, "year": 2021}, {"source": "78", "target": "79", "source_name": "hip hop", "target_name": "popular culture", "weight": 2.0, "year": 2021}, {"source": "78", "target": "80", "source_name": "hip hop", "target_name": "folk music", "weight": 3.0, "year": 2021}, {"source": "78", "target": "82", "source_name": "hip hop", "target_name": "heavy metal", "weight": 2.0, "year": 2021}, {"source": "78", "target": "85", "source_name": "hip hop", "target_name": "jewish music", "weight": 1.0, "year": 2021}, {"source": "78", "target": "88", "source_name": "hip hop", "target_name": "oxford university press", "weight": 1.0, "year": 2021}, {"source": "78", "target": "89", "source_name": "hip hop", "target_name": "electronic music", "weight": 1.0, "year": 2021}, {"source": "78", "target": "90", "source_name": "hip hop", "target_name": "blues rock", "weight": 1.0, "year": 2021}, {"source": "79", "target": "80", "source_name": "popular culture", "target_name": "folk music", "weight": 3.0, "year": 2021}, {"source": "79", "target": "82", "source_name": "popular culture", "target_name": "heavy metal", "weight": 3.0, "year": 2021}, {"source": "79", "target": "85", "source_name": "popular culture", "target_name": "jewish music", "weight": 1.0, "year": 2021}, {"source": "79", "target": "87", "source_name": "popular culture", "target_name": "music hall", "weight": 3.0, "year": 2021}, {"source": "79", "target": "88", "source_name": "popular culture", "target_name": "oxford university press", "weight": 1.0, "year": 2021}, {"source": "79", "target": "89", "source_name": "popular culture", "target_name": "electronic music", "weight": 1.0, "year": 2021}, {"source": "80", "target": "82", "source_name": "folk music", "target_name": "heavy metal", "weight": 1.0, "year": 2021}, {"source": "80", "target": "85", "source_name": "folk music", "target_name": "jewish music", "weight": 2.0, "year": 2021}, {"source": "80", "target": "87", "source_name": "folk music", "target_name": "music hall", "weight": 3.0, "year": 2021}, {"source": "80", "target": "88", "source_name": "folk music", "target_name": "oxford university press", "weight": 1.0, "year": 2021}, {"source": "80", "target": "89", "source_name": "folk music", "target_name": "electronic music", "weight": 4.0, "year": 2021}, {"source": "81", "target": "88", "source_name": "avant garde", "target_name": "oxford university press", "weight": 1.0, "year": 2021}, {"source": "82", "target": "83", "source_name": "heavy metal", "target_name": "folk rock", "weight": 2.0, "year": 2021}, {"source": "85", "target": "88", "source_name": "jewish music", "target_name": "oxford university press", "weight": 1.0, "year": 2021}, {"source": "88", "target": "89", "source_name": "oxford university press", "target_name": "electronic music", "weight": 1.0, "year": 2021}]}]} \ No newline at end of file