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: Johnson submitted his work to the teacher. Sentence2: She looked over it. Sentence3: Although he got every question correct, she gave him an F. Sentence4: He was immediately confused and contacted the principal.

When he realized this, he fired the teacher.