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: Yesterday, I went shopping for new shoes. Shoes were very cheap when I was young. I noticed that they have become very expensive. I had to go to the bank and get out more money. Now I have enough money to buy some shoes.
 selected sentence: I noticed that they have become very expensive.

I go shopping for new shoes >Causes/Enables> I notice that they have become very expensive