Teacher: 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.
Teacher: Now, understand the problem? If you are still confused, see the following 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: How many books are there in the British Library?
Reason: 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 instance: Article: Settled by the Celts, invaded by the Romans and the Normans, and ruled by the English, Wales' population has regularly changed over the ages. Wales, particularly South Wales, became a melting pot of European nationalities and cultures. At first workers from England, Ireland and the rural areas of Wales rushed into the coalfields of South Wales. By 1911, workers from Ireland, Italy and Spain had joined the industrial workforce there. Many of these newcomers were prepared to work for less pay. But during this period, workers, dissatisfied with regular pay cuts, poor safety, the growing trend of employers to pay workers with tokens , which could only be spent in the company store, returned to the land. In 1891, the rural population of Wales was about 616,000 and by 1911 just over 649,000 people lived and worked in these areas. The rural population continues to grow slowly even today. People from richer parts of the UK, particularly southern England, are buying holiday or retirement homes in Wales. In some areas this has led to a shortage of affordable housing for local people. This, combined with the lack of employment prospects in rural Welsh communities, has started a new movement of people in search of jobs and homes into the towns and cities of Wales and to other parts of the UK and Europe. As so many Welsh people have migrated to other countries over the last 200 years, it's really no surprise that many visitors come to see friends and s -- there were 229,000 visitors in 1998. These visitors strengthen their links to their land of origin and continue to support the Welsh economy. During the hot summer days, about 28% of the visitors visit the countryside and nearly 70% visit the seaside.
Answer: Because people could buy holiday or retirement homes there.
Student:
Why was South Wales so attractive to people in the early 20th century?