{
  "task_id": "waterquality_002",
  "domain": "WATER_QUALITY_PORTAL",
  "autonomy_type": "ordered table",
  "oracle_output_cardinality": 2,
  "instruction": "我在梳理里奥格兰德河下游 2001–2010 年的变化趋势，想从位于 RIO GRANDE BELOW ANZALDUAS 下游且仍属于 HUC 13090002 的监测站点中，为 Hidalgo County 和 Cameron County 各选出一个代表站点。先在上述范围内分别筛选两县的候选站点，只保留站点详情页中类型标注为 River/Stream 的监测站点，并要求其 Microbiological、Nutrient、Organics, Other 和 Physical 四类记录均覆盖 2001–2010 年；若同一县有多个站点符合条件，则选择四类记录首次同时齐备时间更早的那个站点。随后，记录入选站点的 MonitoringLocationIdentifier、四类记录最早同时齐备的年份，以及 Microbiological、Nutrient、Organics, Other、Physical 各自的起始年份。最后，请按 Hidalgo、Cameron 的顺序输出一行字符串：<County>:<MonitoringLocationIdentifier>|<四类同时具备的最早年份>|<Microbiological起始年>|<Nutrient起始年>|<Organics, Other起始年>|<Physical起始年>，两段之间用英文逗号分隔。",
  "start_url": "https://www.waterqualitydata.us/",
  "output_format": "请按 Hidalgo、Cameron 的顺序输出一行字符串：<County>:<MonitoringLocationIdentifier>|<四类同时具备的最早年份>|<Microbiological起始年>|<Nutrient起始年>|<Organics, Other起始年>|<Physical起始年>，两段之间用英文逗号分隔。",
  "oracle_answer": "Hidalgo:TCEQMAIN-15808|1998|1998|1998|1998|1998,Cameron:TCEQMAIN-13177|1995|1981|1981|1995|1981",
  "metadata": {
    "State-Gated Retrieval": [
      "只在 RIO GRANDE BELOW ANZALDUAS 下游且仍属于 HUC 13090002 的监测站点中，为 Hidalgo County 与 Cameron County 各选一个代表站。",
      "候选 detail page 必须为 River/Stream，且 Microbiological、Nutrient、Organics, Other、Physical 四类记录都覆盖 2001-2010。",
      "若同县有多个合格站，则取四类记录首次同时齐备年份更早的站点。"
    ],
    "dependency_type": "Data + Control",
    "intra_chain": true,
    "inter_chain": true,
    "data_dependency": [
      "the downstream root station and county split yield Hidalgo and Cameron candidate mainstem stations within HUC 13090002",
      "detail pages yield River/Stream validity, the four characteristic-group start years, and the earliest year when all four groups are simultaneously present for 2001-2010 coverage",
      "final rows are produced only after county-specific candidate chains are rerun under the preserved downstream root state and then ranked by common-start year"
    ],
    "control_dependency": [
      "the Hidalgo branch must preserve the “below TCEQMAIN-13664” downstream root state rather than flowing back to the anchor itself",
      "a multi-select characteristic-group hit is only provisional until all four groups are fanned in to one MonitoringLocationIdentifier and tidal/intake conflicts are excluded on the detail page",
      "county winners are valid only after late-start and non-river candidates are removed and the common-start-year tie-break is recomputed"
    ],
    "freeze": {
      "historical_window": "stations below RIO GRANDE BELOW ANZALDUAS within HUC 13090002, split by Hidalgo and Cameron County, with Microbiological, Nutrient, Organics, Other, and Physical coverage over 2001-2010"
    },
    "answer_type": "multi-row ordered table"
  },
  "rubric": {
    "inclusion_conditions": [
      "只在 RIO GRANDE BELOW ANZALDUAS 下游且仍属于 HUC 13090002 的监测站点中，为 Hidalgo County 与 Cameron County 各选一个代表站。",
      "候选 detail page 必须为 River/Stream，且 Microbiological、Nutrient、Organics, Other、Physical 四类记录都覆盖 2001-2010。",
      "若同县有多个合格站，则取四类记录首次同时齐备年份更早的站点。"
    ],
    "exclusion_conditions": [
      "排除在 Hidalgo 分支丢失 downstream 根状态、把起始站自身回流进候选集的结果。",
      "排除把四个 Characteristic Group 一次多选就当成同时满足，而没有按站点 ID 扇入核验的结果。",
      "排除 tidal、intake、late-start 等 detail page 明确冲突的站点。"
    ],
    "normalization": {
      "record_separator": ",",
      "field_separator": "|",
      "schema_per_record": [
        "County:MonitoringLocationIdentifier",
        "common_start_year",
        "Microbiological_start_year",
        "Nutrient_start_year",
        "Organics_Other_start_year",
        "Physical_start_year"
      ],
      "ordering": "emit exactly two records, with Hidalgo first and Cameron second",
      "county_prefix": "use the county label in title case, followed by : and the uppercase MonitoringLocationIdentifier",
      "year_fields": "emit four-digit years as plain integers",
      "common_start_year": "the earliest year in which all four required groups are simultaneously present for the chosen county station",
      "stop_condition": [
        "each county branch is rerun until one River/Stream station survives all four group checks",
        "the county winner is fixed only after late-start and non-river candidates are excluded at detail depth",
        "the two county segments are emitted on one line in the fixed Hidalgo-then-Cameron order"
      ]
    }
  }
}