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: Kate came home at night after a long day at work. The house was dark and quiet. Kate turned on a light. Her friends jumped out from behind a couch and yelled Surprise! They had planned a surprise party for Kate's birthday.
 selected sentence: Her friends jumped out from behind a couch and yelled Surprise!

Kate's friends throw Kate a surprise birthday party >Causes/Enables> Kate's friends Jump out from behind the couch and yell surprise 