Definition: In this task you are given a short story and a question regarding that story. You must answer the question based on the events of the story. Try to use the same words in the story to answer each question. You should completely answer the question in a short answer. Do not include information that is unnecessary to answer the question.
Input: Yuri liked to make crafts. One day, he bought some blank matryoshkas to paint. He worked very hard on painting them. When they were finished, he sold them at a gallery. They fetched a handsome price worthy of the effort he made!
Why did They fetch a handsome price worthy of the effort he made?
Output:
Yuri worked hard.