A summarization prompt produces inconsistent formats and sometimes includes facts not present in the supplied report. Which prompt revision is the best initial improvement?

1. Add contradictory format requirements and let the model choose which one to follow.
2. State the audience, required output structure, and source-only constraint; delimit the report and ask the model to flag missing information.
3. Ask for a longer answer without defining the required format or evidence boundary.
4. Replace the report with a vague request to write something professional.