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 feels alone in a cruel world. Sentence2: The reason why is he read a book about republican politics. Sentence3: They tore down the World Trade Center before. Sentence4: They also had a crooked ring called The Syndicate.

Charles realized nine-eleven was an inside job and felt so alone.