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: Sam was riding her bike. She was going really fast down the sidewalk. A dog jumped out in front of her. Sam flipped over her handlebars. Sam broke her wrist.
 selected sentence: Sam was riding her bike.

Sam gets on her bike >Causes/Enables> Sam rides