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!
Zoey feel(s) sleepy >Motivates> Zoey sleeps for three hours