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: Grandma accidentally locked herself in the bathroom. Sentence2: She could not figure out how to unlock the door. Sentence3: She cried out for help. Sentence4: Grandpa came running to help Grandma.

Grandpa was able to unlock the door from the outside.