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.

Sentence1: Jeff liked to walk his dog around the pond at the park. Sentence2: One day during their walk the dog escaped from his leash. Sentence3: He quickly ran into the pond. Sentence4: The dog could not swim.
Jeff had to dive into the cold water to rescue his dog.