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.

Example Input: 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.
Example Output: What is the colour of blood in a vein near the surface of the skin?

Example Input: Article: Take control of your health by learning these four numbers. They'll help with everything from losing weight to protecting your heart. Your daily calorie needs This is not technically a measurement, but it can have a huge influence on your health. Most women need 2,000 calories a day for good health, and men generally need about 2,550. One way to work out your daily calorie needs is to multiply   your weight in pounds by 13 to 15, depending on your activity level. But roughly, that's 300 to 400 calories for breakfast, 500 to 600 for lunch, and 600 to 700 for dinner. Trying to lose weight? Eat about 500 calories less. Your waist size Waist size is one of the best ways to measure whether your weight is affecting your heart health. When body fat is packed into your abdomen  ,your risk of heart attack increases. For women, health risk begins to rise when your waist is more than 35 inches. For men, risk increases with a measurement when your waist is over 40 inches. Your blood pressure Blood pressure rises and falls normally during the day. When it remains high, you have high blood pressure and this carries a higher risk or heart disease and stroke. A reading of 140/90 mm Hg or more is considered high, and if it's between 120/80 and 139/89, you may still be at risk and should be taking steps to prevent the development of high blood pressure. Your morning pulse rate Your pulse rate is the number of times your heart beats in one minute. A normal resting pulse rate is 60 to 90 beats per minute. People who are fit tend to have lower resting pulse rates because their heart muscles are in good shape. But if you don't exercise regularly and your heart rate is lower than the normal range, tell your doctor--it could be a sign of heart disease. 
 Answer: Taking in a little fewer calories than the total amount
Example Output: How can you control daily calories if you decide to lose weight?

Example Input: Article: A graded reader is a book containing simplified languages used to help learners master the language. Readers come in different levels, from beginners to advanced. English learners need to choose a reader that is suitable for their level. Why use readers? Lots of research shows that extensive reading improves all aspects of language learning, including vocabulary, speaking skills, fluency ,writing skills and reading comprehension. prefix = st1 /Reading is a way of learning English without classes or a teacher. It helps develop learner independence. And while reading graded readers, learners don't have to run to a dictionary because the language is at their level. How do I get started? The entire class can read the same book or different books at different times. How do I know the right level? If your class is all reading the same book, choose one that is appropriate for their level. If your students are reading different books, you can have a selection of books at different levels. In this case, don't worry too much about the level. A learner who is interested in detective stories might read a higher level book if the motivation is there. How to read the book depends on students' age, motivation and class time available. Some classes like to read silently, others like to read aloud in small groups and some enjoy being read to by the teacher. Be sensitive to the class and ask for their opinions. Some pre-reading activities are needed. Before students open a book, it is important to spark interest in the story and in the whole process of reading. For example, ask them to guess what the story is from cover, chapter titles and let students put them in the best order, or discuss the author. During reading, choose a suitable chapter or chapters that can be broken down to make a comic strip  . Or students select a part of the book to make into a radio play. Students can also become journalists and report on parts of the story. Choose a piece of action and have students write it up. Besides, students can role-play an interview with a character. 
 Answer: Pupils.
Example Output:
Who do you think the passage is written mainly for?

