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: Billy had a cat named Mittens. Sentence2: Mittens would always sleep on Billy's bed. Sentence3: Billy decided that he would buy Mittens a bed of his own to sleep in. Sentence4: A week later the bed arrived and Billy took it out of the box.

Mittens ignored the bed and slept in the box.