Task: Sentence Ordering
Input (English): Sentence1: John reworked the presentation, and it was a great success. Sentence2: This content, however, lacked polish and needed refinement. Sentence3: John had always felt comfortable in front of crowds. Sentence4: It's not that he was nervous presenting. Sentence5: John had a huge client presentation tomorrow, but he felt unprepared.
Output (English): 54321