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: Ron was putting his horse in a race. He was nervous about it. Ron gave his horse a bath. He combed out her mane. The next day Ron's horse won the race.
 selected sentence: He was nervous about it.

Ron is putting his horse in a race >Causes/Enables> Ron is nervous about it