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: It is your sense of smell that quickly tells you there is good food in the kitchen, or your smelly socks need to be washed. But how do we recognize smell? Particular smells turn on certain groups of brain cells , scientists say. When your nose catches a slight smell of something, one of 1,000 different types of odor-receiving cells pick it up. These cells send an electrical signal to a special part of the brain. A group of scientists studied mouse brains using some particular odors like vanilla, apples and fish. They looked at thin slices of each mouse's brain to see which brain cells had been turned on by each odor. The scientists discovered that each odor produces a similar pattern of active cells in different mice. So, a certain combination of cells can tell a mouse that it is smelling vanilla, apples, fish, or any one of the thousands of other smells. Scientists could use studies like this to create a map. It could show which parts of the brain are activated by different smells. Some other scientists, however, say that researchers should also study animals that do not live in a lab, which have spent their lives smelling things in the natural world. With more smelling experience, they might show quite different patterns.
Answer: found each smell creates a similar pattern of active cells in different mice
Example Output: By doing mouse experiments, the scientists _ .

Example Input: Article: Even before historian Joseph Ellis became a best-selling author, he was famous for his vivid lectures. In his popular courses at Mount Holyoke College in Massachusetts, he would often make classroom discussion lively by describing his own fighting experience in Vietnam. But as Ellis's reputation grew--his books on the Founding Fathers won both the National Book Award and the Pulitzer Prize ---the history professor began to entertain local and national reporters with his memories of war. Last year, after The Boston Globe reported Ellis's experience in the Vietnam war, someone who knew the truth about Ellis _ Last week The Boston Globe revealed that Ellis, famous for explaining the nation's history, had some explaining to do about his own past. "Even in the best of lives, mistakes are made," said Ellis. It turned out that while the historian had served in the Army, he'd spent his war years not in the jungles of Southeast Asia , but teaching history at West Point ( ). He'd also overstated his role in the antiwar movement and even his high-school athletic records. His admission shocked colleagues, fellow historians and students who wondered why someone so successful would beautify his past. But it seems that success and truthfulness don't always go hand in hand. Even among the successful achievers, security experts say, one in ten is deceiving. And, oddly, people often beautify their past once they're famous, says Ernest Brod of Kroll Associates, which has conducted thousands of background checks. Then what makes them do it? Psychologists say some people succeed, at least in part, because they are uniquely adjusted to the expectations of others. And no matter how well-known, those people can be haunted ( ) by a sense of their own shortcomings. "From outside, these people look anything but fragile," says Dennis Shulman, a psychoanalyst. "But inside, they feel hollow, empty,"
Answer: taught history at a military school
Example Output: While Ellis served in the Army, he _

Example Input: Article: Seeing the Horse Eat Fish Once an old man was walking in a street with his horse. It was raining hard. The old man was cold because he was walking in the rain. He wanted to stay in a restaurant. It was a quarter past three in the afternoon. The old man got to a small restaurant. There were a lot of people in it. The old man couldn' t come near the fire. He thought and thought. At last he said to the waiters, "Take some fish to my horse." The waiter and the people were very surprised. The waiter said, "A horse doesn't eat fish." The old man told the waiter, "This horse is very interesting. It can sing, dance and does all kinds of things. It can eat fish, too," So the waiter brought the horse some fish. All the people in the restaurant ran out to see the horse eat fish except the old man. Now the old man sat beside the fire. After a while the waiter came back and said. "Your horse didn't eat any fish." The old man said, "All right, take the fish back and put it on the table. I'll eat it." Note: stove waiter
Answer: he was hungry
Example Output:
The old man felt very cold because _ .