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.

Input: Consider Input: 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.

Output: What's the text mainly about?

Input: Consider Input: Article: Every day, young people across the globe are doing their part to keep the Earth healthy and green. These are just a few kid heroes for the planet. Manatee Minder When she was in second grade, Stephanie Cohen read about a baby manatee hit by a boat off the coast of Florida. Marine biologists saved the manatee. But caring for the sea creature was costly. Stephanie took up a collection and raised $ 27 in one day. Now 18, Stephanie still raises money to help these " gentle giants". She sells manatee decorations, candles and cards on her website kmad. Org. Color Us Green! At Clarendon Elementary School, in Secaucus, New Jersey, the students know what to do with old, used and broken crayons .Recycle them ! They collect the crayons and send them to Crazy Crayons, where they are made into different shapes and sizes. In the past eight years, new Jersey students have recycled nearly nine tons of crayons. Goodbye, Paper Bags! When Adrienne Boukis, 15, was in sixth grade, in Walnut Creek, California, she noticed that many of her classmates carried paper lunch bags. To help kids cut down on waste, she invented a reusable lunch bag, which is partially made from recycled plastic bottles. She sells the bags at greengearbag. Com and some of the _ go to charity that is in need of money. He' s Skiiing to Save the Earth Parker Liautaud, 15, wanted to raise awareness about the effects of climate change on the polar regions. He set out to become one of the youngest people ever to ski to the North Pole. Parker feels he met his goal to inspire others. "All young people have the power to make a change."he said in an interview.
Answer: They all involve themselves in green activities.

Output: What do the kid heroes have in common ?

Input: Consider Input: Article: Dear teachers, do you want to find pen pals for your students? Boys and girls, do you want to find your own e-pals ? Here is some advice on how to make e-pals. First, take a look at www.spoton.de community . Click on international pen pal sites to find some of our favorite international e-pal and pen pal web sites. Do not forget: some e-pal services are not free and some are safer than others. Remember to read a web site safety warning before you join! KidFu (www.kidfu.com) says it is the safest place online for kids to chat, play games and make friends. Get your parents to help you register and then you can write things about yourself or read what other kids have written. There are also chat monitors that make sure that the online chat rooms are safe and friendly. KidFu costs money, but the first month is free. If you join Epals (www.epals.com), you can choose a pen pal among 65,000 kids from 191 countries. You can also find information about how teachers can get pen pals for their pupils. Or if you want to start sending e-mails right now, go to Europa Pages (www.europapage.com/ penpal-form.html). Lots of young people have written their names, interests, home countries and their e-mail addresses. Just click on a name and start writing!
Answer: Workers and doctors.
Output: Who is the passage written for?