Detailed Instructions: In this task, you're given an article and an answer. Your task is to generate the question for the answer based on the given article.
See one example below:
Problem: Article: There are a lot of public libraries in Britain. These libraries have more than one hundred and fifteen million books, not including those libraries of public schools. Public libraries not only lend books, music records but also help children, patients in hospitals and others to get special play readings, film shows and so on. The first public libraries were founded in about the year 1850. Today's public libraries usually have a reading-room, a lending room and a reference room. The greatest and most famous library in Britain is that of the British Library in London. It was founded in 1973 and has over 10, 000, 000 books. It has nearly every magazine, newspaper and book published in Britain and other parts across the world. 
 Answer: 10,000,000 or less.
Solution: How many books are there in the British Library?
Explanation: In the Article, 10,000,000 is mentioned for the number of books available in the British Library, so this is a good question.

Problem: Article: It was an extremely hot day. My younger brother Walt and I had decided to go swimming in a deep swimming hole across Mr. Blickez's farm and through some woods, because it would be the only way to cool ourselves down. The only problem with our plan was that this farm was guarded by a huge mean   Hereford bull  . Mr. Blickez had told us that Elsie was the meanest bull in town, maybe even in the county and we believed in him. But the hotter it got, the more we thought there was something _ about what he said. For one thing, we remembered Mr. Blickez liked telling tall tales; for another, Elsie seemed like a strange name for a bull. Finally, I talked Mom into asking permission for us to walk through the farm, and Mr. Blickez agreed. On our way across the farm, we stopped at the fence to admire the swimming hole. The sun shone brightly across the cool waters. We couldn't wait to get there. Suddenly, Walt shouted loudly. Elsie had run to him and was licking   his back. I immediately hid under the fence. However, when I looked up, I saw that Elsie wasn't a big mean bull at all. She was just a friendly young cow, and she was going to keep licking my brother's back as long as he stood still. When we discovered the truth, we were so happy. We then ran to the swimming hole and jumped in. The water was just as wonderful as we had dreamed. After that day, we had many good days and we often visited our secret swimming hole guarded by the so-called "big mean bull". . 
 Answer: They had to face a very mean bull.
Solution:
What was the problem faced by the author and his brother?