user: 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.

Let me give you an 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.
The answer to this example can be: How many books are there in the British Library?
Here is 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.

OK. solve this:
Article: Counterfeit   goods, or false versions of products, may cost the government of Kenya as much as $1 billion each year. The fake goods also hurt business owners who find it hard to keep customers. But information technology is being used to try to stop the problem. Jemima Mwafigu is a 34-year-old businesswoman who sells products like perfume. But in the first year of running her business, she found it hard to keep customers because of counterfeit goods. Ms. Mwafigu says her business has improved since she began using a smart phone application called Barcode   Scanner. The app is used to authenticate   products. It checks to make sure the products are not counterfeit. "With this application I'm able to scan the bar codes of each perfume and instantly I get the production date, the _ and I'm able to know the safety," she says. "That way, I have confidence in selling to my customers." In 2010, Kenya created the Anti-Counterfeit Agency, or ACA, to fight against illegal trade. The ACA has successfully asked government officials for stronger punishments for counterfeiters. Agnes Karingu is the agency's acting director for research and awareness. She says the ACA is trying to stay one step ahead of those making fake goods. "We are also looking into IT solutions where we can be able to use SMS programs, bar codes and information sharing," she says. "The end users of the products will actually be able to get the authentication information, and this information comes back to ACA and intellectual property rights holders." The agency is testing another program called Allvirtuous. The application is another way to find out if a product is real or not by scanning its barcode. The barcode information is sent to a database. Then a result is sent back to the app. The International Chamber of Commerce is a global business organization. It says the value of counterfeit goods produced around the world is expected to be more than $1.7 trillion   this year. 
 Answer: To inform us that phone apps can help stop counterfeiters' trade.
Answer:

assistant: What's the main purpose of this passage?