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 met up with a online shoe seller at the mall. Before he gave me the shoe-box, I gave him by money. Afterwards, he quickly ran off. As dumb as I was, I opened the box after he left. There was a fake pair of shoes in the box.
 selected sentence: As dumb as I was, I opened the box after he left.

An online shoe seller gives me a box >Causes/Enables> I open the box