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: Liam had brought some nuts for a snack on a school trip. Ted had asked if he could have some. Liam and Ted weren't really friends but Liam was nice. Ted threw the shells all over the bus floor. Liam had to stay late to clean the bus since he brought the snack.
 selected sentence: Liam had to stay late to clean the bus since he brought the snack.

Liam gets told to stay late >Causes/Enables> Liam has to stay late