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.

[Q]: Article: Three men were travelling across the desert when their car broke down. There were no other traffics, so their only hope was to walk. Before they set off, they looked around in the car for useful things to take with them. One of the men took a bottle of whisky. Another took an umbrella. The third unscrewed a door from the car and carried that. After they had been walking for almost a day, they came across a camel caravan travelling towards them. "Let's try to join the caravan," one of the men said. "It's going the wrong way but we'll be safer than if we keep on alone across the desert." The other s agreed, so they asked the leader of the caravan for permission to join it. "You can join the caravan only if you answer three questions," he said. He pointed to the first man's bottle. "What is that and why are you carrying it?" he asked. "It's a bottle of whisky. I decided to carry it with me so that if I feel miserable and want to give up, I can get drunk, cheer myself up and then keep on walking." "Very sensible," the leader of the caravan said. Then he pointed to the next man and his umbrella. "It hasn't rained in the desert for many years," he said. "Why are you carrying an umbrella?" "I don't want to get heat exhaustion," he replied. "The umbrella will give me shade from the sun." "Very sensible," the leader of the caravan said. He pointed to the third man and his car door. "And why are you carrying a car door?" he asked him. "I thought that if I got too hot I could open the window and let some air in," he explained. 
 Answer: They exchanged it for another one.
[A]: What happened to the three men's car?


[Q]: Article: John sent his mother expensive presents on his mother's birthday every year. He liked to show her how rich he was. "I must find something wonderful for her, and it must be the only one in the whole world. Then my mother must be very happy." John thought. He advertised   in the newspapers. "Wanted--the best present for the woman who has everything. " For many days his telephone did not stop ringing. People phoned him from all over the world. They wanted to sell him "the best present". But they did not have anything that was the only one in the whole world. Then less than a week before his mother's birthday, a man came to his office. He was carrying a cage, and in the cage there was a large bird. "This bird, "the man said, "can speak ten languages and sing any pop song. There is no other bird like it in the world. " "I will listen to it, "John said. "If what you said is true, I will buy the bird from you." The man spoke to the bird. "Talk to me in French, " he said. The bird spoke to him in French. "Tell me a joke in Japanese, " he said. The bird told him a joke in Japanese. "Sing a famous pop song, "he said. The bird sang a famous pop song. "I'll buy it, "John said. "How much do you want?" "One hundred thousand dollars, "the man said. This was a lot of money but John paid him. Then he sent the bird to his mother with a birthday card. The day after his mother's birthday he phoned her. "Well, mother, "he said, "Is the bird wonderful?" "Oh, it was delicious, dear, "she said. 
 Answer: Because he was the richest man in the world.
[A]: Why did John send her mother expensive presents for her birthday every year?


[Q]: Article: Inventors are always looking for ways to make our lives easier, greener and a lot more fun.Take a look at 2010's biggest and coolest breakthroughs in science and technology.What in the world will inventors dream up next?  Superhero Suit Have you ever dreamed of becoming a superhero? Dream no more.There's a real Iron Man suit, XOS 2, which provides the power to lift 200 pounds with ease .It was designed to help the military with heavy lifting.One person in the suit could do the work of three soldiers. Up, Up and Away! It took him 30 years to develop it, and now Glen Martin's invention is ready to take off.The Martin Jetpack allows its operator to fly 8,000 feet into the air.Unfortunately, you can't soar through the skies too long.The jetpack holds only about 30 minutes' worth of fuel. Hardworking Robot The EMIEW2 robot is the perfect office helper.Need a document delivered? No problem! It can also guide visitors to their destinations.The three-foot-tall robot can identify different human voices and respond to commands.One day, it may serve as a receptionist or a security guard. Green Machine  Say goodbye to gasoline! The AirPod car runs on air power.That means this car won't pollute.A high-pressure air tank can fill the car in minutes.The three-wheeler can travel about 130 miles between fill-ups. Beef Power All aboard the beef train! Amtrak's Heartland Flyer runs partly on fuel that is made from cow fat.The goal is to reduce carbon emissions by 10%.The train travels between Oklahoma City, Oklahoma, and Fort Worth, Texas. Robo-Guard EMILY is a robotic, four-foot-long buoy .She can swim through riptides at up to 24 miles per hour.Her inventor, Tony Mulligan, says that's 15 times as fast as human lifeguards! EMILY is powered by a tiny electric pump and operated by remote. 
 Answer: EMILY.
[A]:
Which invention was made to help the military?


