Definition: In this task, you're given a four sentences of story written in natural language. Your job is to complete end part of the story by predicting appropriate last sentence which is coherent with the given sentences.
Input: Sentence1: Mike used to play racketball with Perry. Sentence2: They would reserve a court a couple times a week. Sentence3: But one time Mike hit Perry by accident in the back of the head. Sentence4: Perry was not very happy about that.

Mike had to apologize.