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: David was a sad boy. He had nobody to play with. One day, his cousin came over. The two played for hours. David was no longer sad.
 selected sentence: David was a sad boy.

Nobody plays with David >Causes/Enables> David is a sad boy