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: Greg picked up his friend. They went off road trucking. The truck got stuck. Greg couldn't get it out himself. Greg got it out with his friend'.
 selected sentence: Greg couldn't get it out himself.

Greg's truck got stuck >Causes/Enables> Greg couldn't get truck out