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.

Article: Carnival does not take place only in Louisiana. There are many celebrations around the world. In Brazil, the celebration is supposed to go on from the Saturday before Mardi Gras to Mardi Gras Day, but in some Brazilian cities the celebration can last seven or eight days. Just like New Orleans, not many important things are decided in Brazil from New Year's Day to Mardi Gras Day because everyone is preparing for or celebrating carnival. Most Brazilian parades have a subject, which could be political and historical. The parades had to have a subject related to Brazil until 1996. Some cities in Brazil do not have a street carnival but they might have an indoor ball. Bolivia has carnival parades for children and then more parades for adults. The children dress up in costumes and march in the streets. The adults make traditional dance groups and dance in the streets. But the main part of Bolivia's carnival is getting wet. Almost everyone gets wet from water balloons and water buckets. In Oruru, Bolivia, their carnival is held in the last ten days of the carnival season. People there participate in crafts and dancing, but their main carnival event is a ceremonial parade that lasts for twenty hours and parades for four kilometers. Over 20,000 dancers are involved as well as 10,000 musicians. This parade attracts at least 400,000 people. The carnival in Venice, Italy is often regarded as the most carefully prepared carnival and lasts the ten days before Lent . Many events are held in the canals including shows, concerts, dances, and water processions . The official ending to the celebration is the ball held in St. Mark's Square.
Answer: Carnivals around the world.
What's the best title of the passage?

Article: The European Union on Monday prohibited the use of X-ray body scanners in European airports, parting ways with the U. S. Transportation Security Administration, which has used hundreds of the scanners as a way to screen millions of airline passengers for explosives hidden under clothing. The European Commission, which enforces common policies of the EU's 27 member countries, adopted the rule "in order not to risk doing harm to citizens' health and safety." As a ProPublica/PBS NewsHour investigation detailed earlier this month, X-ray body scanners use ionizing radiation ,a form of energy that has been shown to damage DMA and cause cancer. Although the amount of radiation is extremely low, equal to the radiation a person would receive in a few minutes of flying, several research studies have concluded that a small number of cancer cases would result from scanning hundreds of millions of passengers a year. European countries will be allowed to use an alternative body scanner relying on radio frequency waves, which have not been linked to cancer. The U. S. Transportation Security Administration (TSA) has also used hundreds of those machines --known as millimeter-wave scanners --in U. S. airports. But unlike Europe, it has decided to use both types of scanners. The TSA would not comment specifically on the EU 's decision. But in a statement, TSA spokesman Mike McCarthy said, "As one of our many layers of security, TSA uses the most advanced technology available to provide the best opportunity to detect dangerous items, such as explosives. " We strictly test our technology to ensure it meets our high detection and safety standards before it is placed in airports," he continued. "Since January 2010, advanced imaging technology has detected more than 300 dangerous or illegal items on passengers in U. S. airports nationwide." Body scanners have been controversial in the United States since they were first used in prisons in the late 1990s and then in airports for tests after 9/11.
Answer: They won't risk causing cancer.
Which of the following is true about the new body scanners to be used in Europe?.

Article: This could be the perfect gift for the partner, who embarrasses you on the dance floor. Smart socks, which can teach to dance, may be the answer for _ The socks have been developed as a running tool to help runners improve their skills. Thanks to the socks, users can accurately record not only know far and fast they run but also how well. It means the user maximizes theirperformance, and reduces damage to body and prevents hurt. The hi-tech socks are made of special fibers that watch the movements of your feet. They look, feel and can be washed like normal clothes. Sensorsrecordeach movement and send it by an ankle transmitter to a smart phone. Then a "virtual coach" application shows the information and can tell the user what they are doing wrong, and help to improve skill in any task with feet. The socks should be useful to athletes and weekend joggers. "People think running is so easy and of course everybody can do it but not necessarily safely and well," Dr Davide Vigano said. A recent study showed that between 60 and 80percent of runners got hurt per year. This is pretty much more than any other human activity. Researchers say the technology can also be developed to teach people how to dance, play sports such golf, or even to help to teach women to walk better in high heels. Mr. Vigano said, "People could all benefit from the idea. We have had interest from all sorts of sports, like skiing, football, cycling and golf. Anything where you have to use your feet can use it. It could even be put in high heels to help women walk in them safely." Socks are just the start, and the technology could be used in gloves, hats and boots. The socks, anklet and software package, are expected to be sold for around PS120, which will go onsalein March.
Answer: They can monitor the movement of feet.
What's special about fibers that the socks are made of ?