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: A policeman got a call about a suspicious man outside a school. Sentence2: The officer arrived at the school and found a man humming a song. Sentence3: The tune sounded familiar to the officer. Sentence4: He hummed along with the man as he finished the song.

When they were done they both had a good laugh.