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: One day, Billy and Susan decided to go to the falls. They packed a lunch and their swimsuits into the car. The whole way there, they got more and more excited. When they got to the park, they climbed all they way up to the falls. They had a beautiful time swimming that day.
 selected sentence: They packed a lunch and their swimsuits into the car.

Billy and Susan decide to go to the falls >Causes/Enables> Billy and Susan pack a lunch and their swimsuits