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: I once needed to write a story. Sentence2: I decided to write about dragons. Sentence3: They had to fight each other for a mate. Sentence4: They fought for days.

Eventually, one triumphed.