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: Tim was upset. He couldn't tie his shoe. His father came to help. He showed him how to do it. The boy found it very simple.
 selected sentence: He couldn't tie his shoe.

Tim isn't taught to tie his shoe >Causes/Enables> Tim can't tie his shoe