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: Mary was in biology class. Sentence2: It was Valentine's day and some kids were receiving candy-grams. Sentence3: Suddenly, Mary received one. Sentence4: She had no idea who could have sent it.

Despite her efforts, she never did find out who sent the candy.