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 National Geographic Magazine, later shortened to National Geographic, is the official journal of the National Geographic Society. It published its first issue in 1888, just nine months after the Society itself was founded. It has become one of the world's best-known magazines and is immediately identifiable by the characteristic yellow border running around the edge of its cover. There are 12 monthly issues of National Geographic per year, plus additional map supplements. On rare occasions, special editions are also issued. It contains articles about geography, popular science, history, culture, current events, and photography. The current Editor-in-Chief of National Geographic Magazine is the well-known photographer, Chris Johns, who has photographed extensively in Africa. The foreword to Johns' own illustrated book on Africa was written by Nelson Mandela. Society Executive Vice President John Q. Griffin, and President of the Magazine Group, has overall responsibility for the English language magazines at National Geographic. Terry B. Adamson, Society Executive Vice President who also is the Society's chief legal officer and heads governmental relations, has overall responsibility for the Society's international publications. With a worldwide circulation in all languages of nearly nine million, more than fifty million people read the magazine every month. In May, 2007, National Geographic magazine won the American Society of Magazine Editors' prestigious General Excellence Award in the over two million circulation category and the best photography award for three issues of the magazine in 2006.
Answer: About 12 issues.
Solution:
How many issues dose the National Geographic Magazine have per year?