Definition: In this task, you will be given a short story. One sentence from the story is chosen. Consider the events that happen before that sentence, or are likely to have happened before it. Does any of them directly cause it, or simply make it possible? You should write your answer in the form " A >causes/enables> B". Try to use phrases and sentences from the story to compose your answer when possible.
Input: story: Pat saw a hill in his backyard and hatched a plan. He dug into the hill to make a deep hole. He lined the sides of the hole with wood to make a room. Pat used this as his roots cellar for his food. He put a door on it and began to fill it with food.
 selected sentence: He put a door on it and began to fill it with food.

Pat makes a cellar >Causes/Enables> Pat fills the cellar with food