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 laughed at his friends for going to jail. Sentence2: He thought he'd be a scientist, not a prison inmate. Sentence3: But, when he saw his x-girlfriend with another guy, he lost his cool. Sentence4: Charles chased them in his car.

His girlfriend called the police and Charles was arresting.