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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: ECO-friendly technology was the hottest trend at the 39thTokyo Motor Show, which opened last Friday.     About 240 car manufacturers from 13 countries presented new models. Most were powered by hybrid ,fuel cell  and electrical systems. Carmakers are championing more environmentally models amid increasing oil prices and environmental concerns.    "It's now carmakers' social responsibility to protect the environment," said Mazda president Hisakazu Imaki.     Seventy-nine cars and motorcycles are being presented to the public for the first time, according to the Japan Automobile Manufacturers Association.    The organizing association said the biennial  show, due to end on November6,was sure to have a large impact on the automobile industry.     Manufacturers are currently competing in the shift from gasoline-run engines to hybrid, fuel cell or electricity-powered systems.     Mazda has a new sports vehicle, which runs on a hybrid electric-petrol system. It is also showing a gasoline-hydrogen run sports car.     A member of the Ford family, Mazda plans to market a hybrid version of the Tribute sport utility vehicle (SUV) next spring and enhance its co-operation with Ford in hybrid systems development. Honda's fuel cell sedan  on show uses a hydrogen-oxygen fuel. The system only sends water out its exhaust ,a better solution for the environment and less polluting than hybrids. 
 Answer: prefix = st1 /TokyoShows Eco Cars
Solution:
What would be the best title for the passage?