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: Lucy and her grandparents ate dinner. Lucy ate all her fries and got more. She wanted more but grandma stopped her. Lucy had to eat her hamburger first. She ate it quickly and grabbed the last of the fries.
 selected sentence: Lucy had to eat her hamburger first.

Grandma stopped Lucy from getting more fries >Causes/Enables> Lucy has to eat her hamburger first