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.

Input: Consider Input: Article: Mark Twain was a famous American writer in his day. He liked to play jokes on his friends. One day one of his friends lost his wallet and asked Mark Twain to pay his train ticket for him. "But I don't have enough money to pay both your ticket and mine," Mark Twain said. The friend didn't know what to do. "We can do this," said Mark Twain." We can get on the train and when the conductor came to check the tickets , you can hide under my seat." Later, however, when the conductor came to check the tickets, Mark Twain gave him two tickets --- one for himself and one for his friend . Then he explained in aloud voice," My friend is a strange man. When he travels on a train, he does not like to sit on the seat." Of course everyone in the train looked at the poor friend under the seat and laughed at him loudly.
Answer: Because the friend lost his money.

Output: Why did the friend ask Mark Twain to pay his train ticket for him?

Input: Consider Input: Article: In February 2006, Lydia Angyiou and her two sons were walking through their village in northern Canada. The sound of children shouting made her turn around. To her horror, Lydia saw a 700-pound polar bear behind her eyeing her seven-year-old son. Getting between the bear and her child, Lydia yelled at the children to run away. She then began hitting and kicking the animal as hard as she could. A neighbor who heard all the noise came and shot the bear. But everyone agreed it was Lydia who had saved her children's lives. A local policeman described it this way: "... I guess when your back is up against the wall, ... we come up with super-human strength." Where does this "super-human strength", courage and quick thinking come from? Experts say it comes from stress! In stressful situations, the body releases chemicals that prepare it to take action. These chemicals give people the speed and strength they need to fight danger or run away from it. When we think of stress, we usually think of its negative effects. Studies, though, show that moderate levels of stress are actually helpful. In fact, the way we perform is usually affected by the amount of stress we feel. Stress causes the brain to release adrenaline which in turn increases our energy and excitement. The chemical gives us clearer minds and helps us to do more. This is why some people say they work better under a deadline. Adrenaline that is not released for long periods of time can cause us to increase and strengthen our abilities instead of weakening them. We sometimes turn out our very best work when we push ourselves to the limit. Stress can also make us more confident. Handling small amounts of stress now prepares us for handling serious situations in the future. Who knows? Today's stress may even prepare for the next polar bear that comes along!
Answer: You are cornered.

Output: What does the policeman probably mean by saying "your back is up against the wall"?

Input: Consider Input: Article: Two travelling angels stopped to spend the night in the home of a wealthy family. The family was impolite and refused to let the angels stay in the guest room. Instead the angels were given a space in the cold underground room. As they made their bed on the hard floor, the older angel saw a hole in the wall and repaired it. When the younger angel asked why, the older angel replied, "Things aren't always what they seem." The next night the pair came to rest at the house of a very poor, but very kind farmer and his wife. After sharing what little food they had, the couple let the angels sleep in their bed where they could have a good night's rest. When the sun came up the next morning, the angels found the farmer and his wife in tears. Their only cow, whose milk had been their only income, lay dead in the field. The younger angel was very angry and asked the older angel, "How could this happen? Why did you not watch out for the cow? The first man had everything, yet you watched over his house," she accused. "The second family had little but was willing to share everything, and you did not help." "Things aren't always what they seem," the older angel replied. "When we stayed in the underground room , I noticed there was gold stored in that hole in the wall. Since the owner was so greedy and unwilling to share his good fortune, I asked God if I could seal the wall so he couldn't find it. Then last night as we slept in the farmer's bed, the angel of death came for his wife. I asked God if the angel could take the cow instead. You see, things aren't always what they seem. "
Answer: Because she didn't like the greedy owner.
Output: Why did the older angel repair the hole for the rich family?