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: Tom found some art in a garage sale. He thought it looked nice and bought it. When he put it up he noticed he had it backwards. Tom flipped the art upside down. It turned out to actually be really ugly.
 selected sentence: When he put it up he noticed he had it backwards.

Tom buys some art >Causes/Enables> Tom puts the art up