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 moved into a new apartment. Now I need to put up all of my wall decorations. I have nails and screws, but no tools. I am using a roll of quarters as a hammer. It is not working too well, and I will have to seek tools.
 selected sentence: I have nails and screws, but no tools.

I buy nails >Causes/Enables> I have nails