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: Do you sleep well? Some people get off to sleep as soon as the head hits the pillow, but many others are not so lucky.In fact,the lack of quality sleep has become a public health issue around the world.According to the World Association of Sleep Medicine,45 percent of the world's population suffer from sleep problems.One in eight people don't sleep well and are easily woken.7.6 percent sleep less than 3 hours each night.Some even can not fall asleep for several days in a row. As a basic bodily and mental need,sleep is essential for our survival.It helps us to fight diseases,strengthen our memory, perform better in work and school and improve our quality of life.Lack of sleep is known to have a significant negative influence on health,both in the short and long term.Poor sleep has been associated with obesity, weakened immune systems and even some cancers,as well as depression and anxiety. The World Sleep Day, held on the third Friday of March,is an annual celebration of sleep to lighten the burden of sleep problems through better prevention and management of sleep disorders. Unhealthy lifestyle may be the first to blame for sleeplessness.More and more people use cellphones and computers in bed,with many staying up until midnight.Modern technology does make our life convenient,but abuse of it ruins our health.Environmental conditions,such as temperature,noise,light,bed comfort also play an important role in one's ability to get proper sleep.Besides,improper evening diet,like a full or an empty stomach,coffee and alcohol all contribute to sleep problems.Of course,when it comes to causing poor sleep stress from finances,family or work should never be ignored. However, those who suffer from sleep disorders don't necessarily have to continue to do so--most sleep problems can be solved. 
 Answer: The majority of the world's population can't sleep well.
Solution:
What can be inferred from Paragraph 1 ?