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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: The latest fashion in Japan is posing for photos with your hand pressed against your cheek as if you have toothache. The "cavity pose" is said to make the model's face appear attractive, slimmer and smaller, which is considered more beautiful in Japan. The craze is sweeping Japanese social media, as well as fashion magazine front covers. Just recently a model of a popular culture magazine, NYLON, did a pose which looked as if she had toothache. Twitter user, Okoge, spotted it among a range of similar magazines, with front cover models all doing the same pose. Okoge posted photos of the front cover models all with the exact same toothache pose, on the social media site, writing, "Does everyone have cavities?" The image has since been re-tweeted more than 35,000 times, but this is anything but an isolated incident . Twitter and Instagram are going crazy for the pose, too. The name, which means cavity pose, is called "mushiba no poozu" or "mushibapoozu" in Japanese. Some people also refer to it as the" mushibagaitaipoozu", the "cavity hurts pose", "mushibamitainapoozu" or "looks like a cavity pose", or even, "mushibaninattapoozu" or "I got a cavity pose". According to the magazine, Kotaku, such photographs first appeared on Twitter last year in Japan. Many Japanese people said they are doing the cavity pose. And in only a few weeks, the trend has spread to art, popular cartoons and even national magazines. There have been more and more photos cropping up online from earlier this year, but whether the trend will stand the test of time remains to be seen.
Answer: They like doing the toothache pose when being photographed.
Solution:
What is the strange thing regarding fashion models in Japan, according to the passage?