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: Jill had a pet bird. She had to go on vacation. She asked her best friend to feed it. The best friend forgot. Jill's bird starved to death.
 selected sentence: She had to go on vacation.

Jenny plans a vacation >Causes/Enables> Jenny has to go on vacation