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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: Below is a selection from a popular science book. If blood is red, why are veins blue? Actually, veins are not blue at all. They are more of a clear, yellowish colour. Although blood looks red when it's outside the body, when it's sitting in a vein near the surface of the skin, it's more of a dark reddish purple colour. At the right depth, these blood-filled veins reflect less red light than the surrounding skin, making them look blue by comparison. Which works harder, your heart or your brain? This question depends on whether you're busy thinking or busy exercising. Your heart works up to three times harder during exercise, and shifts enough blood over a lifetime to fill a supertanker. But, in the long run, your brain probably tips it, because even when you're sitting still your brain is using twice as much energy as your heart, and it takes four to five times as much blood to feed it. Do old people shrink as they age? Yes and no. Many people do get shorter as they age. But, when they do, it isn't because they're shrinking all over. They simply lose height as their spine becomes shorter and more curved due to disuse and the effects of gravity . Many (but not all) men and women do lose height as they get older. Men lose an average of 3-4 cm in height as they age, while women may lose 5 cm or more. If you live to be 200 years old, would you keep shrinking till you were, like 60 cm tall, like a little boy again?No, because old people don't really shrink!It is not that they are growing backwards--their legs, arms and backbones getting shorter. When they do get shorter, it's because the spine has shortened a little. Or, more often, become more bent and curved. Why does spinning make you dizzy ? Because your brain gets confused between what you're seeing and what you're feeling. The brain senses that you're spinning using special gravity and motion sensing organs in your inner ear, which work together with your eyes to keep your vision and balance stable. But when you suddenly stop spinning , the system goes out of control, and your brain thinks you're moving while you're not! Where do feelings and emotions come from? Mostly from an ancient part of the brain called the limbic system. All mammals have this brain area--from mice to dogs, cats, and humans. So all mammals feel basic emotions like fear, pain and pleasure. But since human feelings also involve other newer bits of the brain, we feel more complex emotions than any other animal on the planet.
Answer: Dark reddish purple.
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What is the colour of blood in a vein near the surface of the skin?

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Article: Travelling abroad for leisure is becoming more and more popular for Chinese. The UK is high up in the list of places that the Chinese want to visit. There is a sense of mystery about the UK; it's often the images of England's green parks, countryside and Victorian houses that people point to as an alternative to polluted, overcrowded cities such as Beijing and Guangzhou. The capital is viewed as modern and dynamic, while being filled deep with history. When asked what other images are thought of by the UK, the reply is often "the Queen, tea and Oxbridge". So what's stopping them actually coming? Sebastian Wood ,the British ambassador in Beijing, has described the UK as a _ , and while this is perhaps an exaggeration ,Britain does have a reputation as a country that is harder to access. The main problem for Chinese tourists is obvious. Although visa applications are now completed online, visitors are still required to visit one of 12 UK centers across the country for a face-to-face interview and fingerprinting. If you don't live near one of these enters already, you'd have to travel some distance to get there. Another problem is also to be mentioned. If travelers from China visit the UK, they also want to cover as much ground as possible. But the UK is not included in the Schengen visa, which allows access to a host of 26 European countries such as France and Germany. So it makes the former seem a less worth it. There is also the issue of cost: PS47 for a Schengen visa, PS82 for the UK. On top of this, the UK is viewed as stricter in its handing of visas compared with the rest of Europe, fed by urban legends of rejected applications. In the end, the decision comes down to one question: Is Britain worth a visit?
Answer: No one needs to travel a long distance to get a center.
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Which of the following statements is NOT true for the UK visa?

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Article: Is your family interested in buying a dog? A dog can be a good friend to your family, but if you choose the wrong kind of dog, it can cause you a lot of trouble. Families should sit down and discuss the problems before buying a dog.Even if the children in your family are the ones who want the dog,the parents are the ones who are really responsible for seeing that the animal is properly cared for.If you don't know much about dogs,it's a good idea to go to the library for books about different kinds of dogs,as well as books about how to train a young dog. Dogs of different kinds change in popularity as the years go by. One of the most popular dogs these days is the German shepherd . This is because it provides protection. The family should be warned that these dogs grow up to be very big, and may he too powerful for children, If your house is not big, a toy dog may be a good choice . These dogs are very small and easy to train. They don't need to be walked daily.
Answer: Parents.
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According to the passage, who should take care of the dog?