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: Rick had a big pet snake in his home. When he moved to a small apartment for work, he had to get rid of her. His friend watched the snake for a year while Rick worked. When Rick returned home, he was so happy to get his snake back. The snake had grown almost a foot while he was away!
 selected sentence: When Rick returned home, he was so happy to get his snake back.

Rick has to get rid of his pet snake >Causes/Enables> Rick is happy to get his snake back