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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: A clique(,) is a group of friends who hang out together and act in similar ways. Cliques are common feature of the teen years. Members of a clique usually have certain things in common. For example, they might all be good students. Membership in a clique is limited. Not everyone who wants to belong can join. Cliques can have a positive or negative influence. Because most teens have a strong need to belong, they want to feel that they fit into a group. Cliques can help them meet this need. Sometimes teens feel unsure of themselves, and they use a clique to gain approval of what they wear or how they act. Cliques can become harmful, however, if they pressure members to behave the same way as the group that may damage their health. Cliques may discourage members from making their own decisions, giving their own opinions, or having other friends who aren't accepted by the clique. Cliques may even pressure members to act in ways that go against their own values and beliefs, such as lying to parents or teachers. Cliques can also hurt people outside the group. For example, members might make fun of a teen who isn't in the clique. If you find yourself under this type of pressure from a clique, here are some actions you can take to improve your situation. * Suggest other activities. Offer ideas that don't involve hurting others or putting anyone at risk. * Find new friends. If staying in the clique is becoming a negative experience, you will be better off with new friends.
Answer: Because it meets teens' need of belonging.
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Why do teens want to be a member of a clique?

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Article: Alzheimer's disease affects millions of people around the world. American researchers say the disease will affect more than one hundred million people worldwide by the year twenty fifty. That would be four times the current number. Researchers and doctors have been studying Alzheimer's patients for a century. Yet the cause and the cure for the mental sickness are still unknown. However, some researchers have made important steps towards understanding it. Several early signs of the disease involve memory and thought processes. At first, patients have trouble remembering little things. Later, they have trouble remembering more important things, such as the names of their children. There are also some physical tests that might show who is at risk of developing Alzheimer's disease. The tests look for proteins in brain and spinal cord fluid. The proteins appear to be found only in people with the disease. The protein tests correctly identify the presence of the disease in about ninety percent of patients. Now, a much simpler physical test to predict Alzheimer's risk has been developed. Researchers found that trouble with the sense of smell can be one of the first signs of Alzheimer's. Using this information, they developed a test in which people were asked to identify twelve familiar smells. These smells included cinnamon, black pepper, chocolate, paint thinner, and smoke. The study continued for five years. During this period, the same people were asked to take several tests measuring their memory and thought abilities. Fifty percent of those who could not identify at least four of the smells in the first test had trouble with their memory and thinking in the next five years. Another study has shown a possible way to reduce a person's chances of developing Alzheimer's disease in old age. Researchers in Chicago found that people who use their brains more often are less likely to develop Alzheimer's disease. Those who read a newspaper, or play chess or word games are about three times less likely to develop the condition. Researchers say they still do not know what causes Alzheimer's disease. But they say these findings might help prevent the disease in the future.
Answer: The patients of Alzheimer's disease.
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Whats the main idea of the passage?

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Article: In the latest romance-drama, Descendants of the Sun (<<>> ), a handsome soldier Yoo Shi-jin (Song Joong-ki) meets the pretty doctor Kang Mo-yeon (Song Hye-kyo) in a hospital, and he doesn't hesitate to hit on her. The dialogue, which takes place early in the first episode, immediately indicates that this is no ordinary South Korean drama. There's no family feud, or secret crush, or love tangles, or guesses and misunderstandings. The 16-episode show is set in the fictional war-torn country of Uruk . Song Joong-ki is the leader of a special warfare command unit, while Song Hye-kyo plays a doctor who works for a humanitarian medical organization. Both are sent in the midst of disaster and disease as part of their work with UN peacekeeping troops. Both know and show clearly what they want and what they hate. But what stands out the most are Song's skills as a pick-up artist . Boldness and creativity are the key weapons in his arsenal. When Kang invites Yoo to drink wine with her, Yoo, who is not allowed to drink alcohol as a soldier, says, "There is a way" before kissing her. Forget about the "eighth-episode rule". This kiss happens in the fourth. Humor also does the trick. On their first date in a cinema, Yoo says, "This is the most exciting moment of my life. The moment I am with a beautiful woman before the theater lights go out." When Kang tries to give Yoo a hard time, Yoo jokes, "I mistook you for a beautiful woman because it's dark." And actor Song Joong-ki, who just came back from two years of military service last May, makes sure he delivers his pick-up lines just right. "In Deep Rooted Tree (<<>> ) and The Innocent Man (<<>> ), he [Song Joong-ki] showed he had the steel to play fearless and heartless men - that he could be taken seriously as an actor, despite his pretty face. In Descendants, he hits the emotional core of every scene, whether he has to be bold and amorous, guarded and mysterious, or sad," said critic Foong Woei Wan in The Straits Times.
Answer: colleague
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What is the relationship between Song Joong-ki and Song hye-hyo?