{
  "session_id": "session_data_20260408_214015",
  "total_duration_s": 1653.1,
  "n_input_spans": 46,
  "session_goal": "Wrap red thread and yarn, crochet red fabric, stitch red yarn object, create red pom-pom, and stitch red heart.",
  "sub_goals": [
    {
      "sub_goal_id": 1,
      "start_time": 0.0,
      "end_time": 600.0,
      "description": "Wrap red thread around crafting form and red yarn around circular tool.",
      "episodes": [
        {
          "episode_id": 1,
          "start_time": 0.0,
          "end_time": 300.0,
          "description": "Wrap red thread around red crafting form and tie to secure.",
          "span_indices": [
            0,
            1,
            2,
            3,
            4,
            5,
            6,
            7,
            8
          ]
        },
        {
          "episode_id": 2,
          "start_time": 300.0,
          "end_time": 600.0,
          "description": "Wrap red yarn around red circular craft tool, pulling to adjust.",
          "span_indices": [
            9,
            10,
            11,
            12,
            13,
            14,
            15,
            16,
            17
          ]
        }
      ]
    },
    {
      "sub_goal_id": 2,
      "start_time": 600.0,
      "end_time": 1200.0,
      "description": "Crochet red fabric and stitch red yarn object with needle.",
      "episodes": [
        {
          "episode_id": 3,
          "start_time": 600.0,
          "end_time": 900.0,
          "description": "Crochet red fabric using crochet hook and pull yarn to adjust.",
          "span_indices": [
            18,
            19,
            20,
            21,
            22,
            23,
            24
          ]
        },
        {
          "episode_id": 4,
          "start_time": 900.0,
          "end_time": 1200.0,
          "description": "Stitch red yarn object with needle and pull red yarn to adjust.",
          "span_indices": [
            25,
            26,
            27,
            28,
            29,
            30,
            31,
            32,
            33,
            34,
            35,
            36,
            37
          ]
        }
      ]
    },
    {
      "sub_goal_id": 3,
      "start_time": 1200.0,
      "end_time": 1653.1,
      "description": "Create red pom-pom with pom-pom maker and stitch red heart-shaped fabric.",
      "episodes": [
        {
          "episode_id": 5,
          "start_time": 1200.0,
          "end_time": 1500.0,
          "description": "Wrap red yarn around pom-pom maker, tie center, and cut loops with scissors.",
          "span_indices": [
            38,
            39,
            40,
            41
          ]
        },
        {
          "episode_id": 6,
          "start_time": 1500.0,
          "end_time": 1653.1,
          "description": "Stitch red heart-shaped fabric with red thread and adjust on lap.",
          "span_indices": [
            42,
            43,
            44,
            45
          ]
        }
      ]
    }
  ]
}