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: Lily was having a party. She needed some balloons. She went to the store and picked some. They blew them all up for her. Then, she brought them home.
 selected sentence: They blew them all up for her.

Lily picks out balloons >Causes/Enables> They blow up the balloons