Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Sentence1: Ben sat at his desk, reading a book. Sentence2: Suddenly, Ben felt something crawl across his back. Sentence3: He screamed and whirled around in his chair. Sentence4: Ben's little sister stood behind him, giggling and holding a feather.
Student:
Ben told his sister how much she had scared him.