You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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: London has become a cycle-friendly zone after the launch of a new bike hire scheme. It has been designed to encourage more people to cycle in and around central London. So how does it work?First you have to sign up to the scheme to be sent a key. The key will unlock one of the bikes, which are kept at docking stations in and around central London. You have to pay an access fee for the key and then you pay as you go, for the length of time you use the bike. Transport for London, which runs the scheme, are hoping to have 6,000 bikes and 400 docking stations in place by the end of the year. The new hire system is hoping to ease traffic jams in London and is expected to create up to 40,000 extra cycle trips a day into the city centre. London Mayor Boris Johnston launched the scheme and said London has been "filled with thousands of gleaming machines that will transform the look and feel of our street and become as commonplace on our roads as black cabs and red buses". However, there have been a few problems since the scheme was launched last Friday. On the first day some people found they couldn't dock their bike properly and their usage of the bike had not registered. Transport for London did admit they had been expecting a few "teething problems" and have said they would not charge for the first day as a "gesture of goodwill". Some other people have criticized the lack of docking stations and locks for the bikes as well as the price it costs to hire the bicycles. Despite the comments, the green-thinking London Mayor still says with certainty, "My crusade for the capital to become the greatest big cycling city in the world has taken a great pedal-powered push forwards."
Answer: To relieve the traffic problem in London.
Solution:
What is the aim of the new bike hire scheme in London?