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: On our way to a party the car stopped dead on an isolated road. We got out to relax by the creek while waiting for Someone to pass by. We got hungry so we made picnic from the food we had for the party. Robert's brother played his guitar while his girlfriend sang. The car started right up and made it home like nothing was wrong.
 selected sentence: Robert's brother played his guitar while his girlfriend sang.

Robert's brother grabs his guitar >Causes/Enables> Robert's brother plays