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: Ike bought a koala bear named Gum Nut. He thought it would be a great pet. But he found that he was very wrong! Gumnut caused all kinds of trouble. Soon Ike put him up for sale.
 selected sentence: Ike bought a koala bear named Gum Nut.

Ike looks before a new pet >Causes/Enables> Ike buys a koala named Gum Nut