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 Q]: Article: To the untrained eye it might seem like just a bit of a monkey trick. But when Milly the mandrill (, ) covers her face with her hand she is actually sending a serious message to her fellows: "Leave me alone!" Experts believe the 15-year-old mandrill invented the gesture to warn other monkeys at Colchester Zoo to give her some space. And, surprisingly, the signal has been picked by other members of the group, who use it when they too require _ . Biologist Mark Laidre believes the behavior is evidence of social culture among the mandrills. Importantly, the sign language is unlikely to have been influenced by human activities because mandrills do not copy humans. Mr. Laidre expects further research will uncover other monkeys using cultural gestures -- the ability to communicate with the hands in a meaningful way. "By covering their eyes with their hands, possibly conveyed to others that they wanted to be left alone and this message may have been respected as a 'do not disturb' sign," said Mr. Laidre. While the hand is in place, other monkeys are not likely to approach or touch the monkey. Those who rank lower in the social order also use the technique to avoid attacks from more powerful group members. As the discovery appears to be unique to Colchester Zoo, it suggests it is a local phenomenon that arose naturally in the community of 25 mandrills. Curator Sarah Forsyth said: "We believe Milly made up the signal and over the past five years some of the younger mandrills have picked it up. We're not sure why she started doing it but it could be as simple as 'I can't see them, so they can't see me'. It really does show you how intelligent mandrills are."
Answer: A monkey invented a gesture.
[EX A]: What's the text mainly about?

[EX Q]: 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.
[EX A]: In which of the following periods would the writer most probably advise us to visit Rome?

[EX Q]: Article: First direct coal liquefaction line produces (Xinhua) HOHHOT - China's first direct coal-to-oil project, operated by the country's leading coal producer, Shenhua Group, produced 866,000 tons of oil products last year. The direct coal liquefaction line is located in Ejin Horo Banner , Ordos city, North China's Inner Mongolia autonomous region. It produces 3,000 tons of oil products by using nearly 10,000 tons of coal per day, said Shenhua Coal Liquefaction and Chemical Co.,Ltd. With an investment of 12.6 billion yuan ($2.06 billion), Shenhua Group began construction of the project in 2004, using self-developed technologies. The project began trial production at the end of 2009 with a designed annual capacity of 1.08 million tons of diesel , naphtha and liquefied petroleum gas . Proven coal reserves around Ordos are estimated at 160 billion tons, or 11.4 percent of the country's total coal reserves. As part of its clean energy strategy, China has begun a number of direct or indirect coal liquefaction and coal gasification projects in Inner Mongolia, Shaanxi, Ningxia, Xinjiang and Liaoning in the past three years.
Answer: The proven coal reserves around Ordos.
[EX A]:
What's mainly talked about in the passage?