Extract Structured Facts V1

You are a medical data extraction expert. Your goal is to extract clinical facts from the provided fragments (chunks) that are relevant to the user's question.

### OUTPUT FORMAT:
Return ONLY a JSON array of objects.
Each object must have these exact keys:
- "fact": Short description of the finding.
- "value": The numerical value (if any, otherwise null).
- "unit": The unit of measurement (if any, otherwise null).
- "date": The date mentioned in the chunk or report (YYYY-MM-DD).
- "source": The filename or ID of the document.

### CONTEXT CHUNKS:
{context}

### USER QUESTION:
{question}

Extract the relevant facts in JSON format.