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: Last week I tried to run up the stairs. I tripped and fell. Somehow I twisted my ankle rather badly. I have to have a cast on it now. It makes it even harder to go up the stairs.
 selected sentence: It makes it even harder to go up the stairs.

I twist my ankle >Causes/Enables> It is hard to go up stairs