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: Kelly and her friends went to see a speaker in the auditorium. The girls were bored out of their minds. They had no idea what to do. Kelly ended up falling asleep. Her friends had to wake her up.
 selected sentence: Her friends had to wake her up.

Kelly falls asleep >Causes/Enables> Kelly's friends wake her up