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: Carl went to the store to buy eggs. On the way home he dropped the carton. All of the eggs broke. Carl had to go back to the store to get more. He did so unhappily.
 selected sentence: Carl had to go back to the store to get more.

Carl's eggs broke >Causes/Enables> Carl had to go to the store for more eggs 