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: A storm had just passed over Julian's house. That morning, he went outside to check the mail. He saw that a tree had fallen and smashed his shed. He called some friends over to help him fix things up. They moved the tree and fixed the shed.
 selected sentence: He saw that a tree had fallen and smashed his shed.

The tree falls >Causes/Enables> Julian sees the tree fell