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: Matthew's front yard had a single tree in it. He decided to make his son a swing. His grandpa did the same for him when he was that age. He threw a rope over a branch and tied an old tire to it. His son swung for hours just like he did when he was a kid.
 selected sentence: He decided to make his son a swing.

Matthew has a tree >Causes/Enables> Matthew makes his son a swing