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: Bob discovered his truck had a flat tire. Sentence2: He had never changed a tire before. Sentence3: He got out the tire jack and iron. Sentence4: He couldn't remove the bolts.

Bob called someone to fix his flat tire.