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: Ben took a nap at home. Sentence2: A sound woke up him at around 2:30. Sentence3: Ben figured that it was the mailman dropping off letters. Sentence4: Ben went to the front door to check his mailbox.

He opened it up to find some bills.