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: Wanda's son brought his toy magic set to his mother. He put a metal ball into a small cup. The boy covered the cup and tapped it with his wand. When he uncovered the cup, the metal ball was nowhere to be seen! Wanda applauded her son loudly.
 selected sentence: The boy covered the cup and tapped it with his wand.

Wanda's son puts a metal ball into a small cup >Causes/Enables> Wanda's son taps the cup with a wand