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: Darrel was helping his brother with his homework. His brother didn't understand what Darrel was showing him. They decided to take a break. Darrel tried to explain the problem again. His brother understood much better after he had rested.
 selected sentence: His brother understood much better after he had rested.

Darrel's brother takes a break from doing his homework >Causes/Enables> His brother understands much better after he rested