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: Charles and his son went to the zoo. Sentence2: His son was very fond of monkeys. Sentence3: The went to the monkey enclosure at the zoo. Sentence4: His son mocked, and ran along side the enclosure with the monkeys.

His son had such a good time he fell asleep smiling on the ride home.