In this task, you're given an article and an answer. Your task is to generate the fill-in-the-blank question for this answer based on the given article. The blanks are always at the end of the question, and can be filled with more than one word or phrase.

Q: Article: In the 19thcentury, Americans from the eastern states moved out west to settle in the rich new lands along the Pacific Coast. The most difficult part of their trip was crossing "the Great American Desert" in the western part of the United States by horse and wagon. The western desert can be very dangerous. There is little water and there are few trees. But the desert also has scenery of great beauty. Tall towers of red and yellow stone rise sharply from the flat, sandy valley floor. The scene has been photographed many times and appears in movies and on TV. In Arizona, man-made dams across the Colorado River have made two large lakes in the middle of the dry desert country. At Lake Powell, the red stone arch of Rainbow Bridge rises high above the blue lake. There are few roads. Many areas of Lake Powell's shore can only be reached by boat or on foot. But hikers in this empty desert land sometimes find very old native American pictures, painted on the rocks. In Death Valley, California, the summer temperature rises to 130degF--165degF. There is less than inches of rain each year. Death Valley is the lowest place in America---925 metres below sea level. In the 1800s, many travelers died when they tried to cross this waterless valley in the terrible heat. Although the desert is dry and seems empty, there is plenty of life if you look closely. Snakes and rats have learned how to live in the desert heat. They live underground and come out at night, when it is cool. Plants such as cacti need very little water. When it does rain in the desert (sometimes only once or twice a year), plants grow quickly, and flowers open in a single day. For a short time, the desert is covered with brilliant (very bright) colours.
Answer: wanted to make their home there

A: In the 19thcentury, Americans moved from east to west because they _ .
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Q: Article: Study Books Basic Study Manual Hardcover :$ 37 Future success depends on the ability to learn. Here are the answers to the questions most often asked by parents, teachers, business trainers and by students themselves. Read this book and learn: What the three barriers to study are and what to do about them. What to do if you get tired of a subject you are studying. Twenty-six simple drills to help you learn how to study easily, rapidly and with full understanding. Buy and read Basic Study Manual and use it do dramatically improve your ability to study. Study Skills for Life Hardcover: $32 L. Ron Hubbard's study technology for children opens the door to their future success by giving them the ability to study and learn. Fully illustrated (,) for easy comprehension. Learning How to Learn Hardcover: $25 The basics of effective study for 8 to 12-year-olds, fully illustrated. Children who read and apply the materials in this book regain their liking for study and their ability to apply this knowledge in life. Get this book for a child you want to see win at his studies! How to Use a Dictionary Picture Book for Children Hardcover: $36 In spite of billions of dollars spent on "educational research", children are not taught the most basic skills of learning, even the most basic of these: how to use a dictionary. In fact, a research of educational books for children found no book that told them how to use a dictionary or that one should. Written for children 8 to 12-year-olds, this fully illustrated book will teach your child: How to find words in a dictionary. The different ways that words are used. What the different marks and symbols that are used in a dictionary mean. How to use a dictionary to correctly pronounce words. It includes a section for parents and teachers showing you how to use this book with children. Buy this book and give it to your children to unlock their education. What's more, you will just pay 50% for it before May 1, 2014.
Answer: children

A: According to the advertisements, the four books are all intended for _ .
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Q: Article: A new study suggests that sad music might actually arouse positive emotions. The finding helps to explain why people enjoy listening to sad music, say Ai Kawakami and her colleagues from Tokyo University of the Arts and the RIKEN Brain Science Institute, Japan. Ai Kawakami and her colleagues asked 44 volunteers, including both musicians and nonspecialists, to listen to two pieces of sad music and one piece of happy music. Each participant was required to use a set of keywords to rate both their perception of the music and their own emotional state. The sad pieces of music included Glinka's La Separation in F minor and Blumenfeld's Etude Sur Mer in G minor. The happy music piece was Granados's Allegro de Concierto in G major. To control the "happy" effect of major key, they also played the minor key pieces in major key, and vise versa. The researchers explained that sad music aroused contradictory emotions because the participants of the study tended to feel sad to be more tragic and less romantic than they felt themselves while listening to it. " In general, sad music causes sadness in listeners, and sadness is regarded as an unpleasant emotion. If sad music actually arouses only unpleasant emotion, we would not listen to it," the researchers wrote in the study. "Music that is believed as sad actually causes romantic emotion as well as sad emotion.And people, regardless of their musical training, experience this ambivalent emotion to listen to the sad music," added the researchers. Also, unlike sadness in daily life, sadness experienced through art actually feels pleasant, possibly because the latter does not cause an actual threat to our safety. This could help people to deal with their negative emotions in daily life, concluded the authors. "Emotion experienced by music has no direct danger or harm unlike the emotion experienced in everyday life. Therefore, we can even enjoy unpleasant emotion such as sadness. If we suffer from unpleasant emotion aroused through daily life, sad music might be helpful to negative emotion," they added.
Answer: sad music may help arouse positive emotions

A:
People enjoy listening to sad music because _ .
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