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: There once was a princess who tried to write a story. She was really bad at it. A prince helped her to write a story. Her story was a success! Then the prince and the princess lived happily ever after.
 selected sentence: A prince helped her to write a story.

A prince helped her to write a story >Causes/Enables> Her story was success.