{
  "meta_info": {
    "case_id": "case39_37",
    "bench_subset": "NeuroBench-Multi",
    "difficult": 1,
    "original_dataset": "Multi_QA"
  },
  "agent_input": {
    "data_path": [],
    "instruction": "Answer this standalone multimodal neurophysiology multiple-choice question: What causal conclusion follows from a high correlation between two physiological modalities alone? Options: A: High correlation proves that the first modality causes the second. B: Zero correlation proves that no relation of any kind exists. C: Correlation alone does not establish that either modality causes the other. D: Correlation uniquely identifies the biological mechanism linking the modalities. Select exactly one option, A, B, C, or D. Return only one JSON object with the single field answer and no explanation or extra fields."
  },
  "eval_config": {
    "parser_prompt": "### ROLE\nYou are a precise JSON Extraction Engine for neurophysiological data. Your sole task is to convert natural language reports into structured JSON data.\n\n### TASK\nExtract the answer choice from the agent's report.\n- answer: exactly one of A, B, C, or D.\n\n### STRICT CONSTRAINTS (MANDATORY)\n1. Output ONLY a valid JSON object.\n2. DO NOT include Markdown code blocks.\n3. DO NOT include conversational text, explanations, or extra fields.\n4. The JSON key must be EXACTLY \"answer\".\n5. The answer value must be exactly one of \"A\", \"B\", \"C\", or \"D\".\n6. If the answer is missing or unclear, return {\"answer\": null}.\n\n### OUTPUT TEMPLATE\n{\"answer\": \"<A | B | C | D or null>\"}",
    "metrics": [
      {
        "metric_id": "knowledge_answer_accuracy",
        "type": "categorical_check",
        "target_key": "answer",
        "weight": 100,
        "params": {
          "gt_value": "C"
        }
      }
    ]
  }
}