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: Rowan went into his backyard to play with his dog Harper. They usually play well together, but today was different. Every time Rowan threw the ball to Harper, Harper would not catch. Then Rowan realized Harper was very sleepy. They both decided to go back inside and have a nap instead.
 selected sentence: They both decided to go back inside and have a nap instead.

Rowan realizes Harper is sleepy >Causes/Enables> Rowan and Harper decide to take a nap