system
You are an expert in JSON format. Think step-by-step, then generate syntactically perfect JSON.
user
Produce a JSON document for a experiment result.
assistant
Approach:
1. Task: Create experiment result in JSON
2. Complexity: complex - 8-10 fields, 3-4 levels
3. Format rules: proper braces/brackets, quoted keys, correct value types
4. Structure: Organize data logically with appropriate nesting
5. Populate fields with realistic example data based on the schema.

Output:
{
  "experiment_id": "EXP-503172",
  "title": "Effect of police on couple",
  "methodology": {
    "design": "observational",
    "sample_size": 115,
    "duration_days": 313
  },
  "results": [
    {
      "metric": "safety",
      "baseline": 59.14,
      "endpoint": 85.37,
      "p_value": 0.2568
    },
    {
      "metric": "efficacy",
      "baseline": 19.52,
      "endpoint": 48.11,
      "p_value": 0.2468
    },
    {
      "metric": "safety",
      "baseline": 68.47,
      "endpoint": 23.09,
      "p_value": 0.1033
    },
    {
      "metric": "safety",
      "baseline": 15.86,
      "endpoint": 84.72,
      "p_value": 0.4547
    }
  ],
  "conclusion": "significant"
}