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: Lumosity is a fun game but it's not easy to teach to your Grandma. My Grandma has been trying to match shapes for the last hour. She is about to pull her hair out! My Mom and I are laughing at her. We aren't very nice people.
 selected sentence: She is about to pull her hair out!

My grandma has been trying to match shapes >Causes/Enables> My grandma is about to pull her hair out