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: Amy wore flip flops indoors all year long. Sentence2: Her sister laughed at her for wearing flip flops instead of slippers. Sentence3: As Amy was going down stairs her foot slipped through the flip flop. Sentence4: Amy tumbled down the stairs.

Her sister laughed at her for breaking her cheap flip flop.