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 input: 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 output: 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.
Q: Article: In the next few years, battery technology is going to grow rapidly. No more charging your smart phone every day... No more "range anxiety" for electric cars, as new lithium batteries allow them to drive hundreds of miles on a single charge, just like a tank of gas. And a tiny Chinese company is to be the leader of it all. It already counts Motorola, Nokia, and Samsung as customers for its advanced batteries. But the real money is going to come when it starts selling electric cars. Right now, the stock is trading at an extreme discount, offering in-the-know investors a chance to get in and _ . You need to know all the details about this opportunity today -- and not a day later. To do that, and to gain access to all the information you'll need to invest confidently, simply sign up for the free e-Letter from Energy & Capital by entering your email address below... Once you do, we'll rush you our latest report, China's $2.00 Lithium Linchpin. After getting your report, you'll begin receiving the Energy & Capital e-Letter, delivered to your inbox daily. Become a member of Energy & Capital today. It is free and there is absolutely no obligation , ever. NO-JUNK: By no means will we EVER rent, sell or give away your email address for any reason. Unsubscribing from Energy & Capital is quick, easy, and painless... with just a few clicks. View our Privacy Policy.
Answer: The giving-away of privacy.
A:
What is the possible problem with online subscribing?