{
  "session_id": "session_data_20260409_074642",
  "total_duration_s": 1048.7,
  "n_input_spans": 106,
  "session_goal": "Sew red trim onto red floral fabric, sew neckline, side, and armhole seams on red floral fabric, and sew edges and hem of red patterned fabric.",
  "sub_goals": [
    {
      "sub_goal_id": 1,
      "start_time": 0.0,
      "end_time": 300.0,
      "description": "Cut red trim with pink scissors and sew it onto red floral fabric.",
      "episodes": [
        {
          "episode_id": 1,
          "start_time": 0.0,
          "end_time": 20.0,
          "description": "Prepare workspace and cut red trim with pink scissors.",
          "span_indices": [
            0,
            1,
            2
          ]
        },
        {
          "episode_id": 2,
          "start_time": 20.0,
          "end_time": 300.0,
          "description": "Align red trim with red floral fabric and sew it on with sewing machine.",
          "span_indices": [
            3,
            4,
            5,
            6,
            7,
            8,
            9
          ]
        }
      ]
    },
    {
      "sub_goal_id": 2,
      "start_time": 300.0,
      "end_time": 600.0,
      "description": "Sew multiple seams on red floral fabric, marking with tool and cutting threads.",
      "episodes": [
        {
          "episode_id": 3,
          "start_time": 300.0,
          "end_time": 347.0,
          "description": "Sew initial seam on red floral fabric and mark fabric with marking tool.",
          "span_indices": [
            10,
            11,
            12
          ]
        },
        {
          "episode_id": 4,
          "start_time": 347.0,
          "end_time": 600.0,
          "description": "Sew multiple seams on red floral fabric, repositioning and cutting threads.",
          "span_indices": [
            13,
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            17,
            18,
            19,
            20,
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            55,
            56,
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            60,
            61
          ]
        }
      ]
    },
    {
      "sub_goal_id": 3,
      "start_time": 600.0,
      "end_time": 900.0,
      "description": "Sew straight, neckline, side, and armhole seams on red floral fabric.",
      "episodes": [
        {
          "episode_id": 5,
          "start_time": 600.0,
          "end_time": 758.0,
          "description": "Sew straight seam and neckline seams on red floral fabric, trimming excess.",
          "span_indices": [
            62,
            63,
            64,
            65,
            66,
            67,
            68,
            69,
            70,
            71,
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            74,
            75
          ]
        },
        {
          "episode_id": 6,
          "start_time": 758.0,
          "end_time": 900.0,
          "description": "Sew side seams, armhole seams, and final reinforcing seam on red floral fabric.",
          "span_indices": [
            76,
            77,
            78,
            79,
            80,
            81,
            82,
            83,
            84,
            85,
            86,
            87,
            88
          ]
        }
      ]
    },
    {
      "sub_goal_id": 4,
      "start_time": 900.0,
      "end_time": 1048.7,
      "description": "Sew edges and hem of red patterned fabric with sewing machine.",
      "episodes": [
        {
          "episode_id": 7,
          "start_time": 900.0,
          "end_time": 976.0,
          "description": "Sew edges of red patterned fabric, repositioning and cutting threads.",
          "span_indices": [
            89,
            90,
            91,
            92,
            93,
            94,
            95,
            96
          ]
        },
        {
          "episode_id": 8,
          "start_time": 976.0,
          "end_time": 1048.7,
          "description": "Sew hem of red patterned fabric, smooth and inspect finished fabric.",
          "span_indices": [
            97,
            98,
            99,
            100,
            101,
            102,
            103,
            104,
            105
          ]
        }
      ]
    }
  ]
}