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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.

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?
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.

New input: Article: Internet users can give websites a thumbs up or thumbs down in less than the blink of an eye, according to a recent study by Canadian researchers. Specifically, a positive or negative decision is made within one-twentieth of a second -- less than half the time it takes to blink.It is also about the time for users to read just one word on the website. In the study at the Carleton University in Ottawa, websites were flashed up on a screen for participants to view for 50 milliseconds, and then rated by the viewer. Later when the pages were viewed again for longer periods of time, the viewers' opinion were the same. The study was published in the March/April issue of the journal Behaviour & Information Technology. "It really is just a physiological response.If the first impression is negative, you'll probably drive people off," said Dr.Gitte Lindgard, the leading researcher, "So Web designers have to make sure they're not offending users visually." However, the results did not show how to win a positive reaction from users."When we looked at the websites that we tested, there is really nothing there that tells us what leads to dislike or to like," Dr.Lindgard said. Usually the appeal of a website is tied to color1, movement and interactivity .And while further research may offer more clues , personal taste would always be a limiting factor, according to Lindgard. "If the designs were _ to a set of principles, wouldn't we find an awful lot of similar houses, gardens, cars?" she said."We'd have no variety."
Answer: the time to put the thumbs up or down.
Solution:
How long does it take have a blink of the eye?