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: Dorothy's cat was pregnant. Sentence2: She didn't know how it happened. Sentence3: She convinced the family to keep the kittens. Sentence4: It wound up having 7 kittens.

Dorothy made sure to buy lots of cat food.