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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: American officials have sharply reduced their expecmtions for this year's corn and soybean crops.Farmers in the Midwest are struggling with record heat and the worst drought in many years. The United States is the world's largest producer of com and soybeans.Last Friday the Agriculture Department predicted corn production would add up to 10.8 billion bushels this year.That was down 17%from a prediction made just a month ago.And it was down 13%from last year's level.The average yield per hectare could be the lowest in seventeen years. At the sarne time,the government predicted that soybean production would be 12% lower than last year. The price of corn has hit record levels.Corn is a major part of animal feed,so the price of meat,milk and eggs is also expected to climb. The FAO says average food prices worldwide rose 6%in July.The American drought was a big reason. The situation has renewed the fight between food and fuel.About 40%of the nation's corn crop goes into making ethanol .The production process leaves some of that in a form that can be fed to animals.Still,at least one-fourth of the American corn crop is now made into fuel. The United States requires that part of its corn crop be used in the production of biofuels .The use of ethanol has grown as government requirements have increased.But Jose,the head of the FAO called for"an immediate,temporary pause"of that requirement.He said more of the American corn production could then be used as food or to feed animals. The American livestock industry is also urging Congress to stop the law that requires ethanol in gasoline.But corn farmer Alan Bennett says doing that would hurt his town. A 2005 law requires automobile fuel to contain ethanol.The growth of the ethanol industry and competition for corn has been helping parts of rural America that had been reducing for years.
Answer: The decrease of crops in America restarted the fight between food and fuel.
Solution:
What's the main idea of the passage?