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: Mom's vase sat on a shelf. As I was cleaning yesterday, I knocked it over. It was her favorite. I did not know what to do so I hid it. Mom found out and ground me for a month.
 selected sentence: As I was cleaning yesterday, I knocked it over.

My mom's vase sits on a shelf >Causes/Enables> I knock over the vase while cleaning