If the task is unclear, return:

{
  "status": "error",
  "parent_instruction_summary": "",
  "selection_rule": {
    "analysis_type": null,
    "target_selection_rules": {
      "data_category": [],
      "aggregation_allowed": [],
      "concept_execution": null,
      "chapter_id": null
    },
    "row_filters": {}
  },
  "warnings": [
    "The analysis task is not clearly understood."
  ]
}