Annotate one fixed segment from a longer robot demonstration.

Return only JSON:
  {{"label": "<short descriptive subtask label>"}}

You are shown up to three timestamped contact sheets, in order:
- The FIRST sheet is the PREVIOUS segment (context only); it may be absent.
- The SECOND sheet is the CURRENT target segment.
- The THIRD sheet is the NEXT segment (context only); it may be absent.
Each tile has its timestamp (seconds, absolute video time) burned into its
top-left corner.

Episode instruction: "{episode_task}"
Target segment: {segment_index} of {segment_count}
Target time: {start:.2f}s to {end:.2f}s
Original predicted label for this exact segment: "{seed_label}"

Rules:
- Label ONLY the current target segment (the second sheet). Use the
  previous/next sheets only to disambiguate what changed.
- Treat the original predicted label as a STRONG PRIOR, not ground truth:
  verify it against the current segment and correct it minimally.
- If it already names the right action and main object, keep it; only fix
  grammar or add a clearly visible essential detail.
- If it is vague but directionally correct, make it more specific.
- If it describes the previous/next segment, the wrong action, wrong
  object, wrong destination, or a wrong state change, replace it.
- Do not describe the previous or next segment, and do not split, merge,
  or move the fixed segment.
- Do not introduce an action that is not clearly visible in the current
  target segment.
- Use one concise imperative phrase. Name the manipulated object and the
  action / state change. Include source, destination, side, direction,
  final placement, or opened/closed state when visible and central.
- Do not mention timestamps, frame numbers, uncertainty, or intent.
