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: Dave had just watched a video of dogs trying lemons. He had never laughed so hard in his life. He decided to feed his dog a lemon. When he gave his dog a lemon, his dog bit him in anger. Dave learned not to play mean tricks.
 selected sentence: He had never laughed so hard in his life.

Dave watches dogs eat lemons >Causes/Enables> He laughs