{
  "session_id": "session_data_20260407_113207",
  "total_duration_s": 656.8,
  "n_input_spans": 66,
  "session_goal": "Sew red patterned fabric with red trim, yellow-red trim, decorative trim, and edge seams using a sewing machine.",
  "sub_goals": [
    {
      "sub_goal_id": 1,
      "start_time": 0.0,
      "end_time": 120.2,
      "description": "Attach red trim and sew neckline and straight edges on red patterned fabric.",
      "episodes": [
        {
          "episode_id": 1,
          "start_time": 0.0,
          "end_time": 28.2,
          "description": "Sew first two sections of red trim onto red patterned fabric.",
          "span_indices": [
            0,
            1,
            2
          ]
        },
        {
          "episode_id": 2,
          "start_time": 28.2,
          "end_time": 78.0,
          "description": "Sew remaining red trim sections and check smartphone on table.",
          "span_indices": [
            3,
            4,
            5,
            6,
            7,
            8,
            9
          ]
        },
        {
          "episode_id": 3,
          "start_time": 78.0,
          "end_time": 101.0,
          "description": "Sew curved neckline edge of red patterned fabric.",
          "span_indices": [
            10,
            11
          ]
        },
        {
          "episode_id": 4,
          "start_time": 101.0,
          "end_time": 120.2,
          "description": "Sew straight side edge and next edge section of red fabric.",
          "span_indices": [
            12,
            13,
            14
          ]
        }
      ]
    },
    {
      "sub_goal_id": 2,
      "start_time": 120.2,
      "end_time": 300.0,
      "description": "Sew yellow-red trim and intermediate edge seams on red patterned fabric.",
      "episodes": [
        {
          "episode_id": 5,
          "start_time": 120.2,
          "end_time": 153.0,
          "description": "Sew first two sections of yellow-red trim onto red fabric.",
          "span_indices": [
            15,
            16,
            17,
            18,
            19
          ]
        },
        {
          "episode_id": 6,
          "start_time": 153.0,
          "end_time": 211.2,
          "description": "Sew remaining yellow-red trim sections and check smartphone.",
          "span_indices": [
            20,
            21,
            22,
            23,
            24,
            25,
            26,
            27
          ]
        },
        {
          "episode_id": 7,
          "start_time": 211.2,
          "end_time": 261.0,
          "description": "Sew edge sections and trim sections onto red patterned fabric.",
          "span_indices": [
            28,
            29,
            30,
            31,
            32,
            33,
            34,
            35
          ]
        },
        {
          "episode_id": 8,
          "start_time": 261.0,
          "end_time": 300.0,
          "description": "Sew lower edge and final trim section onto red fabric.",
          "span_indices": [
            36,
            37,
            38,
            39,
            40,
            41
          ]
        }
      ]
    },
    {
      "sub_goal_id": 3,
      "start_time": 300.0,
      "end_time": 433.1,
      "description": "Sew fabric sections, attach decorative trim, and join final edges.",
      "episodes": [
        {
          "episode_id": 9,
          "start_time": 300.0,
          "end_time": 326.8,
          "description": "Sew first and second sections of red patterned fabric.",
          "span_indices": [
            42,
            43,
            44,
            45,
            46
          ]
        },
        {
          "episode_id": 10,
          "start_time": 326.8,
          "end_time": 375.4,
          "description": "Align and sew first section of decorative trim onto red fabric.",
          "span_indices": [
            47,
            48,
            49,
            50,
            51
          ]
        },
        {
          "episode_id": 11,
          "start_time": 375.4,
          "end_time": 392.3,
          "description": "Align and sew next section of decorative trim and discard excess.",
          "span_indices": [
            52,
            53,
            54,
            55
          ]
        },
        {
          "episode_id": 12,
          "start_time": 392.3,
          "end_time": 425.6,
          "description": "Reposition fabric, sew edges, join aligned sections, and adjust sewing machine settings.",
          "span_indices": [
            56,
            57,
            58,
            59,
            60,
            61,
            62
          ]
        },
        {
          "episode_id": 13,
          "start_time": 425.6,
          "end_time": 433.1,
          "description": "Sew final section of red fabric and adjust smartphone and thread.",
          "span_indices": [
            63,
            64,
            65
          ]
        }
      ]
    }
  ]
}