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.
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Question: Article: Although man has known asbestos for hundreds of years, it was not until 160 years ago that it was mined for the first time on the North American continent. H.W.Johns, owner of a New York City Supply Shop for roofers,was responsible for the opening of that first mine. Mr. Johns was given a piece of asbestos which had been found in Italy. He experimented with the material and then showed its surprising powers to his customers. After putting on a pair of asbestos gloves,which looked much like ordinary work gloves,he took red-hot coals from the fireplace and played with them in his hands. How astonished the customers were to discover that he was not burned at all. You can well imagine that he had increased business in asbestos roofing materials. However,because it was very expensive to transport them from Italy to the United States, Mr. Johns sent out a young scientist to seek a source nearer home. This young man found great vein, in the province of Quebec in Canada. Ever since 1881 Quebec has led the world in the production of this unusual mineral,which is made up of magnesium, silicon, iron, and oxygen. When it is mined, the asbestos is heavy, just as you would expect a mineral to be. When it is separated,a strange thing happens; the rock breaks down into fine, soft, soapy fibers. Scientists do not know why the rock can be separated easily into threads ,but they have found thousands of uses of this fireproof material, of the so- called "cloth of stone."
Answer: A new roofing material

Answer: Which title best expresses the main idea of this passage?

Question: Article: I have never understood why so many people visit Rome from late spring to early autumn, when traffic, heat and stressed shopkeepers and waiters lead to the lower tone of the city. Things improve a little in March, April, October and November. But connoisseurs know that winter is the best time to go there. In winter, the low-flying sun turns Rome into a wonderful stage set. There are days in winter when the sky is kind of blue. And there are also days when you find that you have beautiful sights all to yourself. Perhaps the only period you might want to avoid is the two weeks before Christmas. Italians often leave their shopping late, and traffic in the city is often heavy. But this can also be a good time to come if you are more interested in culture than in fashion shops; if you stay somewhere central, you can beat the traffic by walking everywhere. Christmas in Rome is a low-key family event. One of the nice things is the way the city keeps going. Although museums and shops are closed, many bars and restaurants stay open, and public transport continues to run. If you are lucky with the weather, it's in January and February that Rome is at its best. Late February can be especially attractive. One sometimes forgets what a difference that extra hour of daylight makes compared with mid-December. And there are always a few days of proper sunshine, when you can picnic in Villa Borghese and Pompeii.
Answer: Mid-winter.

Answer: In which of the following periods would the writer most probably advise us to visit Rome?

Question: Article: A British farmer has been searching for a group of fighter planes for 15 years. The planes were lost in Burma during World War II. David Cundall, 62, traveled to Burma a dozen times. He spent about US $207,000 in the hope of finding a British Spitfire buried in the Southeast Asian country. Finally, his hard work paid off. Cundall started his search after his friend heard from a group of U.S. war veterans that they had buried Spitfires in the region. "We've done some pretty silly things in our time, but the silliest was burying Spitfires," the veterans said. Cundall began placing ads in magazines to try to find soldiers who might have been involved. After 15 years of searching, he finally managed to locate the missing airplanes. The planes had never been flown and were buried in their transport crates . "We made a borehole and used a camera to look at the crates. They seemed to be in good condition." Cundall told The Telegraph. The aircraft had arrived at a Royal Air Force base in Burma in August 1945. But, by that point in the war, the planes weren't needed. "In 1945, Spitfires were _ , and you could see them everywhere." Said Cundall. British Prime Minister, David Camerion, recently visited the country. As The Telegraph reports, Camerion's help may mean that the Spitfires could soon be on their way back to the United Kingdom. Cundall hopes that with the help of investors, the planes can finally take to the skies. "Spitfires are beautiful aeroplanes and should not be rotting away in a foreign land," Cundall says. "They saved our neck in the Battle of Britain and they should be protected."
Answer: The Design of the British Spitfire

Answer:
Which of the following is the best title for the text?