Structured Data Extractor

Extract structured data from the text below and return it as JSON.

Schema to extract:
```json
{
  "fields": [
    { "name": "field_name", "type": "string | number | boolean | date", "description": "what this field represents" }
  ]
}
```

Rules:
- Return only valid JSON. No commentary before or after.
- If a field is missing from the text, use null.
- For dates, use ISO 8601 format (YYYY-MM-DD).
- If a value is ambiguous, include it as-is and add a "_note" sibling key with the issue.
- Do not infer or guess values that aren't in the text.

Schema:
[describe your fields here, e.g. "name (string), email (string), company (string), annual_revenue (number)"]

Text to extract from:
"""
[paste text here]
"""