You will be given a definition of a task first, then some input of the task.
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.

Sentence1: Sam's teacher assigned the class to make dioramas. Sentence2: When he asked for help, his mom said that wouldn't be fair. Sentence3: Sam did his best, but the diorama wasn't perfect. Sentence4: Next to the other expert-looking models, it looked sloppy and simple.
Output:
Sam got an A because the teacher knew he made it himself.