Teacher: 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.
Teacher: Now, understand the problem? If you are still confused, see the following 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.
Solution: How many books are there in the British Library?
Reason: In the Article, 10,000,000 is mentioned for the number of books available in the British Library, so this is a good question.

Now, solve this instance: Article: The mobile phone rule is just common polite behavior. Most people today have a mobile phone. In fact, many people can't imagine how they ever get along without them. However, many people also complain about mobile phone users. People complain about other people loudly discussing personal matters in public places. They complain when mobile phones ring in movie theaters and concert halls. They complain about people driving too slow, and paying no attention to where they are going because they are talking on a mobile phone. And they complain about people walking around talking to people who aren't there. Whenever a new communication technology becomes popular, it changes the way in which society is organized. Society has to invent rules for the polite way to use the new devices . Our rules of politeness for mobile phones are still evolving(;). The mobile phone rule applies to most public places. Always try to have your phone ring as low as possible or put your mobile phone on the vibration mode, so _ does not distract the people around you. The basic mobile phone rule includes: 1. Switch it off: Turn it off when you have meetings, worship, and so on. 2. Be brief: When you get a call and you're with friends, keep the call short. 3. Permission: Often, it is correct and polite behavior to inform others at the beginning of the meeting that you are expecting an important call and get their permission. 4. Be polite: Don't scream -- speak in a lower-than-normal voice. 5. Don't distract: Avoid talking where you may be distracting to others. 6. Driving: It is not only very dangerous, but also unlawful in most countries to drive and talk on your mobile phone.
Answer: Mobile phone rule.
Student:
What is the best title for this passage?