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: Billy liked sitting by the pond. Sentence2: He would take a book and sit under the tree. Sentence3: His book was about frogs. Sentence4: He looked out onto the pond and a frog was staring at him.

Billy started reading his book out loud to the frog.