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: Harold went for a long bike ride. He had a flat tire about five miles from home. Harold did not know how to fix a flat tire. He had to walk all the way home with his bike. After he got home, Harold taught himself how to fix a flat.
 selected sentence: He had to walk all the way home with his bike.

Harold had a flat tire about five miles from home >Causes/Enables> Harold had to walk home with his bike