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.

Let me give you an 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.
The answer to this example can be: How many books are there in the British Library?
Here is why: In the Article, 10,000,000 is mentioned for the number of books available in the British Library, so this is a good question.

OK. solve this:
Article: A New Headphone The answer to a very great noise may not be blocking it out with earplugs but taking that noise and bearing it as its own game. Earplugs have been the simple but effective way to stop noise affecting your mind, but their shortcoming is that they also block out sounds you may want or need to hear, such as music or someone talking to you. The answer to this problem is " active noise cancellation " headphones that are made up of a microphone and electronics that take all background low-frequency noise, turn the sound waves upside down and rebroadcast them into your ears. The result is that all the unwanted noises around are blocked out. In effect, one set of electronically produced around wave has sucked away the unwanted sound waves of noise. Stand next to a busy road wearing the noise cancellation headphones and the traffic noise disappears. Sit in an airplane and the engine noise dies away. In a noisy office, the noise of office equipment, people and air-conditioning is gone. You can still , however, hear music or people talking because that sound does not have a regular pattern and so the device does not block it.
Answer: To wear a headphone.
Answer:
What is the best way to keep out the unwanted noise?