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: Bob went to the park with his dog Spot. He picked up a stick off the ground. Spot looked up at his owner expectantly. After some teasing, Bob threw the stick across the grass. Spot happily chased after it.
 selected sentence: Spot looked up at his owner expectantly.

Bob picks up a stick from the ground >Causes/Enables> Spot looks up at Bob expectantly