Given the task definition, example input & output, solve the new input case.
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.
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.
Output: How many books are there in the British Library?
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 case for you: Article: Fifteen hours is a long time to be on a plane ,but you know ,Africa is a long way from North America.Finally ,we're in Namibia, a country in southwest Africa.Namibia is about twice the size of California.However, it is home to just over two million people.And the country's main airport is 45 kilometres east of its capital,Windhoek. Now we are in a wildlife park.We will spend five days finding ways to protect this area's wildlife.At the moment ,my wife and our two kids are enjoying some local dishes.I'm talking with workers in this park.I'm so much looking forward to the following days ! --Thomas Yesterday morning ,I had nothing to do ,so I went to visit the Eiffel Tower,a symbol of Paris.It was my first time there,so I took a lot of photos. Finally.The big moment came! A lot of artists came to watch my show.It was a great success.After the show, I attended a big party.It was great,but i felt so sleepy after it. When I got back to my hotel, it was already 1:15am.I went to bed without washing.I just needed a good rest before my two-hour journey home by plane. --Jessica
Answer: By plane
Output:
How did Thomas arrive in Namibia ?