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: I just made myself some popcorn as a snack. The doorbell rang as soon as I sat down to eat. It was my mailman delivering a package. When I came back my popcorn bowl was empty and my son was laughing. I guess I have to make more popcorn if I want my snack.
 selected sentence: It was my mailman delivering a package.

The doorbell rang >Causes/Enables> It was my mailman