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: Chad decided to hang up some pictures. While he was hammering the nail, he hit his thumb. It hurt pretty bad, and Chad got mad. Chad put down the hammer and walked away. He decided today was not a good day to hang pictures!
 selected sentence: Chad put down the hammer and walked away.

Chad hits his thumb while he is hammering >Causes/Enables> Chad puts down the hammer