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.
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.
Example solution: How many books are there in the British Library?
Example explanation: In the Article, 10,000,000 is mentioned for the number of books available in the British Library, so this is a good question.

Problem: Article: Bats are impressive creatures. They are known to carry dangerous diseases like SARS without getting sick. So researchers wanted to know: How do bats fight off so many deadly diseases? Learning their secret could help doctors better treat humans who have these diseases, therefore saving millions of lives. To solve this problem, a team of researchers from Australia and China analyzed bat DNA. The scientists studied two kinds of bats--the Australian megabat, known as the flying fox, and the Chinese microbat. The scientists then arranged the bat genome in order by comparing their DNA. The researchers now think that the special immunity to illness that bats have may be connected to their ability to fly. Bats are the only mammals that can truly fly. Flying uses up a lot of energy. The energy burned for flying produces something in the animal called free radicals . Free radicals can damage DNA and lead to diseases such as cancer. However, bats are not affected by free radicals produced during flight. The reason is that bats carry special genes to repair any damaged DNA. Scientists think that because bats fly and produce free radicals, they've evolved to carry genes that shaped their special immune system. "We're thinking that the evolution of flight led to a sort of effect, influencing not only the immune system but also things like aging and cancer," says Chris Cowled, of the Australian Animal Health Laboratory. "We think we've really found something special." Researchers believe that this discovery might one day be key to helping humans fight diseases such as cancer that attack the immune system and damage DNA.
Answer: Researchers studied bats to help save people.
Solution: What's true about bats according to the passage?