{
  "chunks": [
    {
      "chunk_id": "lecture-1-c1",
      "role": "summary",
      "section": "Module A",
      "line_start": 1,
      "line_end": 4,
      "text": "Lecture 1 introduces Module A and frames the example lesson."
    },
    {
      "chunk_id": "lecture-1-c2",
      "role": "claim",
      "section": "Lesson A",
      "line_start": 5,
      "line_end": 7,
      "text": "Objective: Explain lesson A."
    }
  ]
}