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: Tim and Eric were putting together a jigsaw puzzle. Sentence2: They were able to match up the pieces. Sentence3: The picture they were getting didn't match the box, though. Sentence4: They kept going.

Eventually they realized it was upside down.