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: Pat saw a hill in his backyard and hatched a plan. Sentence2: He dug into the hill to make a deep hole. Sentence3: He lined the sides of the hole with wood to make a room. Sentence4: Pat used this as his roots cellar for his food.

He put a door on it and began to fill it with food.