You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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.

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?
Why? In the Article, 10,000,000 is mentioned for the number of books available in the British Library, so this is a good question.

New input: Article: Many expensive nutrition additives advertised on TV say they can improve your memory. But only ordinary food and healthy habits have been shown to work. A research team from UCLA (University of California at Los Angeles) has designed a four-step plan to improve your memory in just 14 days. "It sounds like another advertisement, but it really works," says UCLA psychiatry professor Gary Small. The team found the four-step plan improved memory function in teenagers under stress and older people. After a two-week study that included brain-teasers , exercise and diet changes, test subjects' memories worked more efficiently. Here's the programme: Memory training: Train yourself with brain-teasers, crossword puzzles and memory exercises that train verbal skills throughout the day. Healthy diet: Eat five rather than three meals a day. The food should be rich in omega-3 fats (omega-3), such as whole grains and vegetables that contain antioxidants . Having frequent meals helps increase blood glucose , the primary energy source for the brain. Physical fitness: Have regular physical exercise such as walking, basketball or running, every day. Stress reduction : Perform stretching and relaxation exercises. Stress causes the body to release a chemical that can shrink the memory centres in the brain. Before-and-after brain scans showed that test subjects experienced on average a 5 per cent increase in working memory. This suggests they were using their brains more efficiently. They also performed better on a cognitive test. A control group that didn't follow the plan showed no big changes. "We've known for years that diet and exercise can help people keep their physical health, which is a key part of healthy aging," said Small. "But keeping mental health is just as important. Now we have evidence that people can improve their memories through a programme of memory exercises and stress reduction."
Answer: He is satisfied with his programme.
Solution:
Why did Small say " It sounds like another advertisement, but it really works"?