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: I had a black lab once. Sentence2: He was a good dog. Sentence3: I played with him every day. Sentence4: He had a good long life of 13 years.

Then one day he died peacefully in his sleep.