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: Around 11am, the school's fire alarm went off. Sentence2: Rushing towards the door, the students stopped when gunshots rang out. Sentence3: Then the teacher instructed them to hide under their desks. Sentence4: Diving under their desks, the students were petrified.

They waited until the incident was over.