{
  "label_to_id": {
    "O": 0,
    "B-DATE": 1,
    "I-DATE": 2,
    "B-TIME": 3,
    "I-TIME": 4,
    "B-DURATION": 5,
    "I-DURATION": 6,
    "B-SET": 7,
    "I-SET": 8
  },
  "id_to_label": {
    "0": "O",
    "1": "B-DATE",
    "2": "I-DATE",
    "3": "B-TIME",
    "4": "I-TIME",
    "5": "B-DURATION",
    "6": "I-DURATION",
    "7": "B-SET",
    "8": "I-SET"
  }
}