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: The boys had been watching birds all month. Sentence2: Finally they decided to build a bird house. Sentence3: They collected some wood, nails, and a couple hammers. Sentence4: Then they got straight to work and fit it all together.

Finally they hung it and stood back to admire their project.