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: Tony wanted to decorate his Christmas tree. Sentence2: He went to the attic and got all of the ornaments down. Sentence3: He opened the box and began taking out the ornaments. Sentence4: One by one, he hung all of them on the tree.

He finished the tree by placing the star on the top.