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: I can always tell when the mail truck is coming. Sentence2: The mail truck makes a loud squeaking sound when it stops. Sentence3: I heard that sound today, so I went outside. Sentence4: The sound was made by a package delivery truck.

The driver gave me a package that I hadn't expected.