{
  "session_id": "session_data_20260406_105912",
  "total_duration_s": 1376.2,
  "n_input_spans": 46,
  "session_goal": "Sew green patterned fabric and green floral fabric with a sewing machine, trim fabric with pink scissors, and handle mobile phone.",
  "sub_goals": [
    {
      "sub_goal_id": 1,
      "start_time": 0.0,
      "end_time": 900.0,
      "description": "Sew the green patterned fabric using sewing machine, scissors, and handle mobile phone.",
      "episodes": [
        {
          "episode_id": 1,
          "start_time": 0.0,
          "end_time": 130.0,
          "description": "Align, sew, and trim threads from the green patterned fabric.",
          "span_indices": [
            0,
            1,
            2,
            3,
            4,
            5,
            6,
            7,
            8,
            9,
            10,
            11
          ]
        },
        {
          "episode_id": 2,
          "start_time": 130.0,
          "end_time": 393.0,
          "description": "Sew multiple seams and inspect the green patterned fabric.",
          "span_indices": [
            12,
            13,
            14,
            15,
            16,
            17,
            18,
            19,
            20,
            21,
            22,
            23,
            24,
            25,
            26,
            27,
            28
          ]
        },
        {
          "episode_id": 3,
          "start_time": 393.0,
          "end_time": 399.0,
          "description": "Handle mobile phone and purple measurement card on the sewing table.",
          "span_indices": [
            29
          ]
        },
        {
          "episode_id": 4,
          "start_time": 399.0,
          "end_time": 611.0,
          "description": "Resume sewing, cut thread with scissors, thread needle, and adjust fabric.",
          "span_indices": [
            30,
            31,
            32,
            33,
            34,
            35
          ]
        },
        {
          "episode_id": 5,
          "start_time": 611.0,
          "end_time": 900.0,
          "description": "Cut edge and trim excess from green patterned fabric with pink scissors, then sew remaining sections.",
          "span_indices": [
            36,
            37,
            38,
            39,
            40,
            41
          ]
        }
      ]
    },
    {
      "sub_goal_id": 2,
      "start_time": 900.0,
      "end_time": 958.5,
      "description": "Sew green floral fabric and fabric strip using the sewing machine.",
      "episodes": [
        {
          "episode_id": 6,
          "start_time": 900.0,
          "end_time": 929.0,
          "description": "Sew green floral fabric and handle small fabric trim piece.",
          "span_indices": [
            42,
            43
          ]
        },
        {
          "episode_id": 7,
          "start_time": 929.0,
          "end_time": 958.5,
          "description": "Sew green fabric strip and reposition green floral fabric on worktable.",
          "span_indices": [
            44,
            45
          ]
        }
      ]
    }
  ]
}