Given the task definition, example input & output, solve the new input case.
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.
Output: How many books are there in the British Library?
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 case for you: Article: 2009 is the year of what? Yes, it's the year of the Ox. But do you know that 2009 is also the year of the telescope? This year the world celebrates the 400thanniversary of Galileo's observations of the universe through an astronomical telescope . In 1609, the Italian scientist first pointed a "Dutch perspective glass" at the night sky and made discoveries that changed mankind's conceptions of the universe. In honor of Galileo's discoveries, the United Nations and the International Astronomical Union have declared 2009 to be the International Year of Astronomy (IYA 2009). IYA 2009 is a yearlong celebration of astronomy. Its goal is to spread knowledge of astronomy's contributions to society and culture and to inspire more interest in astronomy and science, especially among young people. The theme of the celebration is "The Universe, Yours to Discover." One interesting aim of the IYA is to encourage more diversity in the field of astronomy and physics. IYA organizers hope that the yearlong celebration of astronomy will inspire more females and underrepresented minorities to pursue careers in science. An event that will help further that goal is 100 Hours of Astronomy (100 HA) that will fall on April. This event aims to have as many people as possible look through a telescope. From April 2ndto 5th, millions of people worldwide will peer through telescopes to catch their first glimpse of the universe, just as Galileo's did 400 years ago. Sidewalk astronomy events will give city-dwellers an excellent opportunity to see the moon, the planet Saturn, and other objects in position for early evening observations. Organizers hope that the activities of IYA will "promote a greater appreciation of the astronomy." So join the fun. Look through a telescope this year!
Answer: The celebrations in IYA 2009.
Output:
What does the article mainly talk about?