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: Marty unzipped his jacket and drew a knife on the bully. Sentence2: The bully ran away and Marty approached the bullies victim. Sentence3: Marty helped him to his feet and walked with him to class. Sentence4: The next day, the boy asked to sit with Marty at lunch.
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Marty declined, and said he didn't sit with nerds.