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: Karen took her three boys for a day at the petting zoo. Sentence2: The boys went in to pet the animals and had a lot of fun. Sentence3: One goat bonded well with her oldest son and fell asleep in his lap. Sentence4: Her younger sons enjoyed playing with a few pigs with toy balls.

The petting zoo closed in the evening, and Karen took her boys home.