TASK DEFINITION: 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.
PROBLEM: 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.

SOLUTION: What's the text mainly about?

PROBLEM: Article: Metro Pocket Guide Metrorail Each passenger needs a farecard to enter and go out. Up to two children under ago five may travel free with a paying customer. Farecard machine are in every station, Bring small bills because there are no change machines in the station and farecard machine only provide up to $ 5 in change. Get one of unlimited Metrorail rides with a One Day Pass. Buy it from a farecard machine in Metro stations. Use it after 9:30 a. m. until closing on weekdays, and all day on weekends and holidays. Hours of Service Open: 5 a. m Mon-Fri 7a. m. Sat--Sun . Close: midnight Sun--Thurs 3 a.m. Fri.---Sat. nights. Last train times vary. To avoid missing the last train, please check the last train times posted in the station. Metrobus When paying with exact change, the fare is $ 1. 35 . when paying with a smarTrip card, the fare is $1. 25 Fares for the Senior /disabled customers Senior citizens 65 and older and disabled customers may ride for half the regular fare. On Metrorail and Metrobus, use a senior/disabled farecard or SmarTrip card. For more information about buying senior/disabled farecards, farecard or SmarTrip cards and passes, please visit MetroOpenDoors. com or call 202-637-7000 and 202-637-8000. Senior citizens and disabled customers can get free guide on how to use proper Metrobus and Metrorail services by calling 202-962-1100 Travel tips . Avoid riding during weekday rush periods -before 9:30 a. m. and between 4 and 6 p. m. . If you lose something on a bus or train or in a station, please call Lost & Found at 202-962-1195.
Answer: They make change for no more than $5.

SOLUTION: What should you know about farecard machine?

PROBLEM: Article: More than one in four children alive in Britain today will celebrate their 100thbirthday, official figures showed. The special figure shows a huge social change, with today's children likely to survive far longer than their parents or grandparents. Of the 12.4 million children aged 16 and under, 3.3 million(27%)will become someone who is a hundred years old or more. In a class of 30 children, eight can live to be 100. And the rest of the children are likely to get to an old age, even though they will not make it to three figures. Experts warned that children may live to 100, but that they will not get their State pension until they are 70 or beyond. The State pension age is rising to 66 for both men and women by 2020, and the Government has warned it will continue to rise. Laith Khalaf, a pension expert, said, "Living to an old age is lucky if you can afford it, but a _ if you can't. Those without enough savings will be depending on the State pension which will be changed." It also increases the possibility of millions of people surviving until their 100thbirthday with a poor quality of life because of poor health and little money. Millions of older people have no pensions, no savings and no plans about how they are going to pay for their retirement other than to carry on working. If the older population demands more resources ,then it has to come from their own wealth or the government. Laith said, "Millions of people will be spending over a third of their lives in retirement. It is high time that we reformed the State pension system. We want to make it fair for future generation."
Answer: A low quality of life because of bad health and limited money.

SOLUTION:
What kind of life will people living to 100 probably face?