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: Anna went up on stage nervously. She had a big speech to make. She began talking. But to her surprise, nobody could hear her. The microphone was broken!
 selected sentence: Anna went up on stage nervously.

Anna is called to the stage >Causes/Enables> Anna goes on stage