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: Libby loves to go swimming at the beach. As she gets ready to go, she feels like she is forgetting Something. She decides to leave anyway, and drives to the beach. After swimming for about an hour, she goes to find her towel. Her towel is nowhere to be found, and now she knows what she forgot!
 selected sentence: Her towel is nowhere to be found, and now she knows what she forgot!

Libby reaches for a towel after swimming >Causes/Enables> Libby's realizes she forgot a towel