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.

Example input: Article: Homework can put you in a badmood , and that might actually be a good thing. Researchers from the University of Plymouth in England doubted whether mood might affect the way kids learn. To find out the answer, they did two experiments with children. The first experiment tested 30 kids. Someshapes were hidden inside a different, larger picture. The kids had to find the small shapes while sitting in a room with either cheerful or sad music playing in the background. To test their mood, the scientists asked the kids to point to one of five faces, from happy to sad. Children who listened to cheerful music tended to point to the smiley faces while the others pointed to the unhappy ones. The researchers found that sad kids took at least a second less to find the small shapes. They also found an average of three or four more shapes. In the second experiment, 61 children watched one of two scenes from a film. One scene was happy, and the other was sad. Just like in the first experiment, kids who saw the sad scene acted better compared to the others. The researchers guessed that feeling down makes people more likely to focus on a problem or difficult situation. Not all scientists agree with them, however. Other studies argued that maybe, that cheerful music in the first experiment distracted kids from finding shapes. While scientists work on finding out the answers, it still might be wise to choose when to do your tasks according to your mood. After eating a delicious ice cream, for example, write an essay.
Answer: whether mood affects their learning ability
Example output: Researchers did experiments on kids in order to find out _ .
Example explanation: It is clearly mentioned in the article that to the check effect of mood on children is the main purpose of the experiment.
Q: Article: Children are getting so fat that they may be the first generation to die before their parents, an expert says. Today's young people will be affected by potential killers such as heart disease because of their weight. Fatty fast-food diets combined with the lifestyles with televisions and computers could mean kids will die young, says Professor Andrew Prentice, from the London School of Hygiene and Tropical Medicine. At the same time, the shape of the human body is going through a great change because adults are getting so fat. Here in Britain, the latest research shows that the average waist size for a man is 36~38 inches and may be 42~44 inches by 2032.This compares with only 32.6 inches in 1972. Women's waists have grown from an average of 22 inches in the 1920s to 24 inches in the 1950s and 30 inches now. One of the major reasons why children now are at greater risk is that we are getting fatter younger. In the UK alone, more than one million under 16 years old are thought to be overweight or fat--double the number in the 1980s. One in ten of four-year-olds are also medically said to be obese. The obesity which started in the US, has now spread to Europe, Australia, Central America and the Middle East. Many nations now record more than 20 percent of their population as obese and well over half of the population as overweight. Professor Prentice says the change in our shape has been caused by high-energy foods combined with a dramatic drop in the energy we use as a result of technology developments. He is not alone in his concern. Only last week one medical magazine revealed how obesity was fuelling a rise in cancer cases. Obesity also increases the risk factor for heart disease and so on. An averagely obese person's lifespan is shortened by around nine years while a seriously obese person by much more. Professor Prentice says, "So _ will _ parents _ live _ longer _ than _ their _ children, _ as _ an _ American _ obesity _ expert _ said _ recently?" "The answer is yes--and no." Yes, when most children become obese. No, because this is now becoming an alarmingly serious problem in the US. "Such children will have a greatly reduced quality of life on both body and mind." So say "No" to sandwiches and hamburgers.
Answer: the energy people take in is more than they need
A:
According to Professor Prentice, people become fatter because _ .