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: Jon asked Mary to come with him to an exercise class at the gym. Mary agreed and said she would meet him there. Jon made it to class but Mary wasn't there. Mary texted Jon saying she forgot about the class and apologized. Jon never tried to exercise with Mary again.
 selected sentence: Mary texted Jon saying she forgot about the class and apologized.

Mary didn't come to exercise class >Causes/Enables> Mary told John that she forgot about exercise class