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: Gina's family was having a water fight. Sentence2: They were in the yard dousing each other with water. Sentence3: Her dad thought he had gotten away from the kids. Sentence4: Till they threw a bucket of water on his back.

He winced and grabbed his back as the kids stood laughing.