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: Britain's seed bank, the only one in the world aiming to collect all of the planet's wild plant species, has reached its goal of banking 10 percent by 2010. The Millennium Seed Bank Project, run by Kew Gardens--one of the oldest botanical gardens--will officially place the 24,200th species on Thursday, a pink, wild banana from China. More than 50 countries are now on board with Kew's giant task but vast places of the globe, including India and Brazil, still need to join in and donate seeds, director Paul Smith said. The seed bank is one of the largest and most diverse in the world with more than 1.5 billion seeds. Its goal is to help protect the planet's bio-diversity during a time of climate change. The wild banana seed is under threat of extinction in southwest China from agricultural development. It is a vital food source for Asian elephants and important for growing bananas for human eating. Stored at minus-20 degrees centigrade, so they can last for thousands of years, the seeds await the day that scientists hope never comes--when the species no longer exist in the wild. It is a race against time, Smith said, because in the last ten years alone, 20 plants held in the bank have already been wiped out in the wild. He estimates that between a third and a quarter will become extinct this century. "It is pressing and it is happening now. An area, the size of England, is cleared of primary vegetation every year." Smith said. Because most of the world's food and medicines come from nature, protecting wild plant species is quite important, scientists say. There are already many other seed banks safeguarding food crops, which only account for 0.6 percent of plant diversity. For Kew's next goal--to collect a quarter of wild varieties by 2020--the botanists need 10 million pounds a year, or a further 100 million pounds on top of the 40 million they have already been granted.
Answer: To help scientists study wild plants.
Student:
What's the final purpose of the Britain's seed bank?