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: Karen set her alarm clock, so she could go to work the next morning. The power went out that night. She did not wake up on time. Karen received a phone call from her boss asking about her tardiness. She rushed to work over and hour late and behind on her work.
 selected sentence: The power went out that night.

A thunderstorm passed while Karen slept >Causes/Enables> The power went out that night 