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: Mike went to a used book store to find a book to read. Sentence2: He picked a book of the shelf and paged through it. Sentence3: In the middle of the book was a $20 bill. Sentence4: Mike pocketed the money and went to pay for the book.

He used the money to buy the book.