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    "driver_gas_on": [],
    "driver_steer_pressed_on": [
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    "driver_flags_at_first_record": {
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    "radar_target_loss_s": [],
    "video_precontext_s": 10,
    "source_sampling": {
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  "visual_review_status": "reviewed",
  "review_note": "自动提取的事实，不代表已经完成画面复核或致因判断。"
}