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: Kristin wants her daughter Zoey to take a nap. Zoey does not like to take naps. Kristin reads her a story and tucks her into bed. Zoey falls right asleep. Kristin is happy when Zoey sleeps for three hours!
 selected sentence: Kristin is happy when Zoey sleeps for three hours!

Kristin wants her daughter Zoey to take a nap >Causes/Enables> Kristin is happy when Zoey sleeps