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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.
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Article: Snapshots, the new fashion for an artistic portrait photo: Take it underwater. Zhang Xiaomei, a 20 something Shanghai native who works in the media industry, tried it out twice. "It was a completely different experience," says Zhang of her first such experience last May. "You get the feeling that you're cut off from the rest of the world. But also it s romantic and like a fairy tale." She then successfully convinced her husband to be to have their wedding photos taken underwater a couple of months after her first try. "Can you imagine a 1.87-meter-tall man trying out something like a fishtail under the water?" Zhang says, laughing. A commercial underwater photo portrait is perfect for post 80 and post 90 generations who adore taking snapshots, but are looking for new ways to be artistic, says Ai Cheng, owner and photographer of No.55 Underwater Photography in Shanghai. Ai opened a studio in Shanghai's suburb of Songjiang two years ago, building a 5-meter- deep, fan-shaped pool equipped with heating facilities to start up the business. A 30-minute training on how to smile under the water so that you won't drink too much water and how to open your eyes underwater is offered in his studio for those who don't know how to swim. Ai says most of his customers are female--half of them coming for an artistic portrait photo and the rest for wedding pictures. "Some of them drag their boyfriends or husband-to-be, who are unwilling to go down to the water, to shoot as well," he says.
Answer: The Best Smiles May Be All Wet.
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What would be the best title for the text?

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Article: Hurricane Babette reached the northeastern United States today and caused death and destruction everywhere. The killer storm carried winds of 135 miles per hour. The high winds and heavy rains, together with the force of the Atlantic Ocean, created extremely dangerous waves. It is not yet known how many people died or were hurt in this storm, but it is said that the numbers will be very high. The damage to homes, business and crops will run into billions of dollars. Now that the storm is over, the long, slow rebuilding will begin. With the arrival of the tornado season, the National Weather Service is again telling people how to protect themselves from these deadly storms. The winds from tornadoes are the most violent winds on earth. They can blow up to 400 miles per hour. A tornado looks like a funnel . It is also very loud. It may sound like a train coming at you. In fact, the winds from a tornado can pick up a train and throw it around. If a tornado is seen in your area, it is very important that you protect yourself. A basement is the safest place to go. Try to wait under a table in the basement. If your building does not have a basement, stay on the ground floor but lie flat under a bed or table. Stay away from windows. If you are outside or in your car, try to find a narrow place to lie down in. As the area tries to deal with the worst flood of the century, there are many heartwarming stories of people helping other people. From all over the world people have sent food and clothes to help the thousands who have had to leave their homes. Many volunteers have come to help to make sandbags and use them to build walls against the overflowing river. While the result of this disaster will be terrible for many, it is beautiful to see people coming together to help others and save lives, and property .
Answer: Newspaper articles about the weather.
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What are the three short passages about?

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Article: While most people consider that laughter is one of the nature's great treatments for a whole range of mental and physical diseases, it is still a serious scientific subject that researchers are trying to figure out. "Laughter is social." says Robert R. Provine, author of the book "Laughter: A Scientific Investigation", who has been studying laughter for decades. "Almost all people laugh 'ha-ha-ha' basically the same way. Whether you speak Mandarin, French or English, everyone will understand laughter. There is a pattern generator in our brain that produces this sound. Laughing is also a good way of communicating. Babies laugh long before they speak. No one teaches them how to laugh. They just do it. People may laugh at a prank on April Fools' day. But surprisingly, only 10 to 15 percent of laughter is the result of someone making a joke. Laughter is mostly about social responses rather than reaction to a joke. Deaf people laugh without hearing and people on cell phones laugh without seeing, which shows that laughter isn't dependent on a single sense but on social interactions. And laughter is not just a human thing. Chimps tickle each other and even laugh when another chimp pretends to tickle them. Jaak Panksepp studies rats that laugh when he tickles them. It turns out rats love to be tickled. They return again and again to the hands of researchers tickling them, Panksepp's video shows. By studying rats, scientists can figure out what's going on in the brain during laughter. It has been found that laughter in rats produces a chemical that acts as an antidepressant and anxiety-reducer. Scientists think the same thing probably happens in humans, too. This would give doctors a new chemical target in the brain in their effort to develop drugs that fight depression and anxiety in people. Even so, laughter itself has not been proved to be the best medicine, experts said. "No study has shown that laughter produces a direct health benefit," Provine said, "largely because it's hard to separate laughter from just feeling good."
Answer: because people can communicate with each other by laughing.
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Why does the writer say "laughter is mostly about social responses rather than reaction to a joke"?