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: A farmer was plowing his field when his plow hit something. Sentence2: The farmer thought he had hit a rock, so he needed to dig it out. Sentence3: When he started digging, he found that it was a big bone. Sentence4: A paleontologist came and excavated a mammoth's bone.

The farmer donated the mammoth bone to a university museum.