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: The sirens started going off. Sentence2: The children went out into the hallway. Sentence3: They never thought a tornado would actually hit. Sentence4: The roof started coming off the school.

Luckily no one got hurt.