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: Boris went to the drive-in with his friends on Wednesday. He saw an old sci-fi movie. About half-way through, he bought some popcorn. He thought the cashier was cute, so he asked for his number. Boris is going to the drive-in again, tonight, with his new date.
 selected sentence: About half-way through, he bought some popcorn.

Boris goes to the drive-in >Causes/Enables> Boris buys popcorn