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: Sam was doing yard work in his backyard. His dog kept him company as he worked. Sam saw Someone pull in his driveway so went to see who. His dog came with him. The dog barked as he met the stranger.
 selected sentence: Sam was doing yard work in his backyard.

Sam goes to his backyard >Causes/Enables> Sam does yard work in his backyard