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: After cooking one night, Jason realizes that his knives are very dull. The next day he buys a knife sharpener. He spends one hour diligently sharpening each of his knives. Finally they are all very sharp. Now Jason cooks with a great set of sharp knives.
 selected sentence: The next day he buys a knife sharpener.

Jason decides to buy >Causes/Enables> Jason buys