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.

Example Input: Article: 1. Summer came early to Middlesbrough yesterday, as temperatures shot up to 22degC (71degF), a record for March. But local NFU agent Jim Wilkes says it could be bad news for farmers. "The crops will think it's summer," he told our reporter, "and start sprouting four weeks before time." 2. The death toll of the Burnside train crash rose to four yesterday when John Phillips, 32, of Petersville died in Wallsend Hospital. Another six people are still on the danger list. Mr. Phillips, an electrical engineer leaves a wife and two children. 3. China and the United States reached an agreement on the protection of intellectual property rights yesterday, after difficult marathon talks. The agreement is good news for all parties concerned. The Chinese Foreign Trade Minister described the agreement as a "turning point" in Sino-US trade relations that "promises further progress" in the future. The agreement will not only favorably influence trade relations between China and the United States. It may favorably influence the overall relations between the two countries.
Answer: It is colder than usual in Middlesbrough, and the farmers are worried.
Example Output: What do you get to know from article 1?

Example Input: Article: One of the tough things about being a high school student is that you never seem to get enough sleep at night, which often leaves you nodding off during classes. "The best amount of sleep to get is about seven and a half to eight hours," Peter Venn at Queen Victoria Hospital, UK, told The Telegraph. Spending either less than six or more than nine hours in sleeping puts your health at risk. A popular solution to a lack of sleep at night is to take a "power nap" during the day, but does this work? Generally speaking, it can be beneficial. Research shows that a nap in the middle of the day --even a brief one as short as five or 10 minutes ---can clear your mind and leave you with increased energy and improved productivity , according to Forbes. However, as refreshing as it might be, if you are getting adequate sleep at night, taking a power nap isn't such a wise choice. The reason is that sleeping during the day can interfere with your body's biorhythms . The brain gets used to going to bed at roughly the same time each night and getting up at the same time each day, and you don't want to disturb this routine. One more thing to keep in mind is that a power nap should never be used as a replacement for a good night's sleep. "Twenty minutes of power nap during the day is not like a tablet which will definitely work," Rahul Mukherjee, an Indian sleep specialist, told The Telegraph. "An hour's sleep before midnight is worth a couple of hours' sleep after midnight."
Answer: About seven and a half to eight hours.
Example Output: What is the healthiest amount of sleep for the majority of people according to the article?

Example Input: Article: Even if trees cannot walk, they are still on the move. In parts of the Arctic, entire forests are moving northward. Across the Arctic, temperatures are rising faster than anywhere else in the world. As that happens, the tree line that marks where forests stop and the treeless tundra starts has been shifting northward. Trees growing along the tree line must protect themselves from the cold wind. To do _ , plants tend to grow horizontal branches low to the ground. The energy it takes for trees to grow this way means they don't have enough energy to make seeds. But as Earth's climate has been warming, trees no longer have to just grow horizontally. Many can instead grow up toward the sky. This takes less energy. And with all the leftover energy. these trees have started producing more seeds. This happens especially in places where the white spruce grows. White spruce, which is a North American tree, is quite able to produce a lot of seeds, which can move long distances in the wind. When wind-blown seeds end up on the tundra beyond the tree line, they eventually can sprout new trees. This explains how a forest can move. Of course, the process would work only if the tundra were warm enough. But in recent years, the whole planet has been warming. New trees will provide shelters for some snow, keeping the sun's rays from making the white surface disappear. Instead, the trees absorb the sun's heat. This warms the surrounding air. The extra warmth encourages even more trees to produce seeds. That further boosts a forest's ability to expand. In addition, more trees will trap more snow, preventing much of it from being blown away. Snow can trap heat in the soil below,which encourages trees to grow. The recent rise of temperature has helped more trees grow. The recent rise of temperatures has helped more trees grow past the tree line. People worry about impacts on the animals that depend on frozen conditions for food and shelter.
Answer: The rising temperature.
Example Output:
What is the main cause of the trees in the Arctic moving northward?