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: Grandpa asked Betty if she wanted a drink. Sentence2: Betty said she wanted milk. Sentence3: Grandpa didn't know if she wanted chocolate or strawberry. Sentence4: Betty wouldn't tell him which kind of milk she wanted.

Betty was shy.