{
  "video": "10.mp4",
  "task": "10",
  "instruction_index": 1,
  "total_instructions_for_video": 1,
  "instruction": {
    "category_label": "joint",
    "category": "J4",
    "operation": "J4.1 Identity Swap",
    "prompt_en": "Replace the vintage twin-bell alarm clock with a modern digital alarm clock; replace the metallic ringing sound with a contemporary electronic beep alarm.",
    "audio_label": {
      "audio_op": "replace",
      "sound_type": "event_sfx",
      "edit_aspect": "identity"
    },
    "difficulty": {
      "d1_object_localization": "hard",
      "d1_reason": "The instruction requires locating and isolating a specific object (the alarm clock) within the scene, which does not fill the majority of the frame.",
      "d2_audio_complexity": "simple",
      "d3_cross_modal_linkage": "explicit",
      "d3_reason": "The instruction explicitly describes both a visual change (replacing the alarm clock) and an audio change (replacing the ringing sound)."
    }
  }
}