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: Alice liked to tickle her friends. Usually in the armpits, sometimes the belly. One time she tickled too much. And her friend laughed so hard. She had to change her pants.
 selected sentence: She had to change her pants.

Alice tickles her friend >Causes/Enables> Her friend changes her pants