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: The puppy scratched at the door. Sentence2: He wanted to go out to play. Sentence3: A man opened the door for the puppy. Sentence4: The puppy ran outside.

The puppy looked very happy as it ran in the yard.