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: Oprah was walking across a block. She didn't see any garbage cans and threw paper on the ground. As she continued to walk, several police officers came. They gave her a bill due to littering. They warned her not to do it again.
 selected sentence: As she continued to walk, several police officers came.

oprah walked across block >Causes/Enables> oprah continues to walk