In this task, you're given an article and an answer. Your task is to generate the fill-in-the-blank question for this answer based on the given article. The blanks are always at the end of the question, and can be filled with more than one word or phrase.

Ex Input:
Article: There are records of fingerprints taken many centuries ago. The ancient Babylonians pressed the tips of their fingerprints into clay to record business trade. The Chinese used ink-on-paper finger impressions for business. However, fingerprinting wasn't used as a method for identifying criminals until the 19th century. In 1858, Sir William Herschel was working as an official of the Hooghly district in Jungipoor, India.In order to reduce fraud , he had people living in the district record their fingerprints when signing business documents. A few years later, Scottish doctor Henry Faulds was working in Japan when he discovered fingerprints left by artists on ancient pieces of clay.This finding inspired him to begin investigating fingerprints.In 1880, Faulds wrote to his cousin, the famous naturalist Charles Darwin, and asked for help with developing a fingerprint classification system.Darwin refused, but sent the letter to his cousin, Sir Francis Gallon, who was an eugenicist . Gallon began collecting fingerprints and eventually gathered some 8, 000 different samples to analyze. In 1892, he published a book called "Fingerprints", in which he outlined a fingerprint classification system--the first existence. Around the same time, Juan Vucetich, a police officer in Buenos Aires, Argentina, was developing his own version of a fingerprinting system.In 1892, Vucetich was called in to assist with the investigation of the two boys murdered in Necoche, a village near Buenos Aires. Their mother, Francisca Rojas, accused a neighbour named Velasquez. But when Vucetich compared the fingerprints found at the murder scene to those of both Velasquez and Rojas, _ matched Rojas' exactly.She admitted her crime. This was the first time fingerprints had been used in a criminal investigation.Vucetich called his system comparative dactyloscopy . It's still used in many Spanish-speaking countries. Sir Edward Henry, in charge of the Metropolitan Police of London, soon became interested in using fingerprints to catch criminals. In 1896, he added to Gallon's technique, creating his own classification system, the Henry Classification System. It is the primary method of fingerprint classification throughout most of the world.
Answer: prevent illegal business

Ex Output:
Herschel had people record their fingerprints so as to _ .

Ex Input:
Article: Back in old times, people had little knowledge about the universe and nature. Things we now consider to be common sense were mysteries to our ancestors. Over the years, major breakthroughs have been made in science and many phenomena have been explained. But still, there are always questions we can't yet answer, and The Guardian has listed some of them. 1. What makes us human? Just looking at your DNA won't tell you - human DNA is 99 percent _ to that of the chimpanzee and, believe it or not, 50 percent identical to a banana's! A lot of the things we once thought were unique about us - language and tool use, recognizing ourselves in the mirror and so on - have since been seen in other animals. Perhaps it's our culture that makes the difference or maybe our ability to use fire. It's also possible that our capacity for co-operation and our trading skills are what make us unique. 2. Why do we dream? Given the fact that we spend around a third of our lives sleeping, shouldn't we know everything about it? Unfortunately, scientists are still searching for a complete explanation of what happens when we sleep and why we dream. Austrian psychologist Sigmund Freud believed dreams were the expressions of wishes that we can't fulfill in our real lives. Others have wondered whether dreams are just random "noise" coming from a sleeping brain. 3. Could we someday live forever? Apart from accidents, most people die because of diseases that can be treated and aging. And since many diseases, such as diabetes and cancer, are diseases of aging, treating aging itself could be the key to extending our lives. Our knowledge of what causes us to age - and what allows some animals to live longer than others - is expanding rapidly. And though we haven't quite worked out all the details, we've worked out some pieces of the puzzles such as DNA damage and metabolism , which are all leading to the invention of drugs that can slow down the aging process. If we're lucky enough to lengthen our lives, we might even get to see the day when all of these questions are answered.
Answer: to explain what were once mysteries to our ancestors

Ex Output:
The main point of the passage is _ .

Ex Input:
Article: When I was growing up in the suburbs of New York, our first local Earth Day was organized around a drive to a town field where families were urged to empty items from their basements for recycling rather than dropping them in the dustbin. It was an eye opening idea for a kid in 1970. But as an environmental reporter, I'm bored of the large amount of deals and promotions that arrive by email or in my office or home mailbox on Earth Day. Like Valentine's Day, Earth Day has become a huge marketing opportunity--a way to promote consumption. In fact, Earth Day is such a good sales opportunity that some shops, like Target, have expanded Earth Day into Earth Month. There isn't time to give you a variety of the Earth Day shopping opportunities I was informed of this past week. They included deals on buying bottled water and earth-friendly wipes. My award for the silliest promotion: a plan to gift 25 of the most environmentally conscious stars with unique, useful and "green" products and services, including skin care products, cheese-cake and artwork. My guess is most of the stuff will end up in celebrities' garbage. Is buying and selling a good way to celebrate and protect the environment? I would argue that Earth Day might be an occasion to consider giving up purchases or habits that are environmentally questionable or that we could happily do without. How about not buying bottled water, but refilling a water bottle? How about not buying foods--even "organic" foods--that are packed in non-recyclable plastic? Don't get me wrong. The company of Bridgestone is celebrating Earth Day by promising to repurpose a spent tire for every tire that it sells. Verizon will plant a tree for each cell phone you trade in. Some coffee stores will even refill reusable cups at no charge. Target is giving out free reusable carrier bags without requiring a purchase. But few shopkeepers are taking the next step-charging a fee at the cash register for disposable plastic bags, a common practice in Europe-to encourage customers to use those new reusable carriers. Earth Day is transient . If you only showed love on Valentine's Day, would that really mean anything at all?
Answer: emptying waste for recycling

Ex Output:
The author's first local Earth Day was celebrated by _ .