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.

Ex 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.

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

Ex Input:
Article: A powerful earthquake struck the northeastern coast of Japan at two forty-six p.m. local time on March eleventh.2011. Japan's Meteorological Agency released its first tsunami warnings just three minutes later. The country has one of the best earthquake early warning systems in the world. There are more than four thousand Seismic Intensity Meters in place throughout Japan to measure earthquake activity. These meters provide information within two minutes of an earthquake happening. Information about the strength and the center of the earthquake can be learned within three minutes. There are also concrete sea walls around much of the Japanese coastline. But these measures proved no match for the powerful earthquake and tsunami. Costas Synolakis ,a tsunami expert at the University of Southern California in Los Angeles said,"Japan is one of those most well-prepared countries on earth in terms of tsunami warning. They had a warning. I think what went wrong is that they had not expected the size of this event." He says there are two reasons for this. Japan has not had any event anywhere near as big as this one in the last one hundred fifty years. And scientists had not expected such a large earthquake happening off the coast of Japan. The nine point zero magnitude earthquake was the fourth most powerful earthquake ever recorded worldwide. It was also the worst earthquake ever to hit Japan. The tsunami waves that followed were reported to have reached as high as thirteen meters in some areas. Costas Synolakis says Japan's concrete sea walls were not built to handle such high waves. Experts say early warning systems will continue to be limited by these facts until earthquakes and tsunamis can be predicted
Answer: A newspaper

Ex Output:
Where can this passage probably be adapted from?

Ex Input:
Article: We are going to see the ruins of Machu Picchu in the mountains of the Andes.Machu Picchu was forgotten for centuries but discovered in 1911 by Hiram Bingham, a professor from Yale.It is said to be one of the most beautiful ancient sites in the world. The Incas built the ancient civilization of Machu Picchu between the 12th century and the early 16th century.They spoke a language called Quechua but had no writing system at all.They kept records on various coloured strings with knots called quipu. The Incas proved to be wonderful architects.They built most of their buildings with huge stones but without using any cement to stick them together.However, the huge stones fit together so perfectly that you cannot force a sharp knife between two blocks.They also built bridges, tunnels through mountains and channels to bring water to their cities--just as the Romans did.The Incas turned the mountains into farmlands and planted corn and potatoes, and raised animals like llama and alpaca for food. Now Machu Piccu has become a major tourist site in Peru, attracting people from all over the world.
Answer: About a century ago.

Ex Output:
How long ago was Machu Picchu discovered?