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.
One example: 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 is here: 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.

Now, solve this: Article: The purpose of keeping fit is to avoid illness ,resist the mental and physical fatigue that make us more likely to contract infections ,and above all to feel more pleasure in being alive. Research has shown the value of a balanced diet ,fresh air, sunshine ,enough rest and some forms of regular exercise for everyone .If everyone followed this plan ,the number of people visiting the doctor and going to hospital would be considerably reduced. Unfortunately ,although most people acknowledge the importance of physical fitness ,not enough of us put this into practice .We spend too much time watching others from the comfort of an armchair or a seat in the stand at a sports stadium. One reason why people who are physically fit to live longer is that they do not put the heart under excessive strain and so they reduce the risk of heart and blood vessel diseases .They also avoid suffering the consequences of weakened muscles ,which are the cause of a great deal of back and abdominal trouble. About 640 muscles for about 45% of our body's weight ,they must have the ability to store energy and be continually supplied with fuel by the blood .Sensible exercise ,suited to each individual and preferably undertaken on the advice of a doctor ,is the best insurance of meeting these requirements.
Answer: Because they want to obtain much more money.
Solution:
Why do people want to prevent illness?