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: Jane was on a canoeing trip with her class. She was holding her lunch box in her hand when the boat rocked. Her lunch fell into the water, ruining it. She started to cry. Luckily, her friend offered to share lunch with her.
 selected sentence: She was holding her lunch box in her hand when the boat rocked.

Jane was canoeing >Causes/Enables> The boat rocked