Article: A recent study of ancient and modern elephants has come up with the unexpected conclusion that the African elephant is divided into two distinct species. The discovery was made by researchers at York and Harvard Universities when they were examining the genetic relationship between the ancient woolly mammoth and mastodon to modern elephants -- the Asian elephant, African forest elephant, and African savanna elephant. Once they obtained DNA sequences from two fossils , mammoths,and mastodons the team compared them with DNA from modern elephants. They found to their amazement that modern forest and savanna elephants are as distinct from each other as Asian elephants and mammoths. The scientists used detailed genetic analysis to prove that the African savanna elephant and the African forest elephant have been distinct species for several million years. The divergence of the two species took place around the time of the divergence of Asian elephants and woolly mammoths. This result amazed all the scientists. There has long been debate in the scientific community that the two might be separate species, but this is the most convincing scientific evidence so far that they are indeed different species. Previously, many naturalists believed that African savanna elephants and African forest elephants were two populations of the same species, despite the elephants' significant size differences. The savanna elephant has an average shoulder height of 3.5 metres while the forest elephant has an average shoulder height of 2.5 metres. The savanna elephant weighs between six and seven tons, roughly double the weight of the forest elephant. But the fact that they look so different does not necessarily mean they are different species. However the proof lay in the analysis of the DNA. Alfred Roca, assistant professor in the Department of Animal Sciences at the University of Illinois, said, "We now have to treat the forest and savanna elephants as two different units for conservation purposes. Since 1950,all African elephants... Question: What are Alfred Roca's words mainly about? Yes or no, is the answer "The conservation of African elephants."?
No

Article: There are many people who say Thomas Edison invented the twentieth century. Although there are those who may disagree, yet Edison was one of the greatest inventors in America. Born in 1847 in Ohio, Thomas Edison attended school for only three months. After his teacher said that he could not learn, Edison's mother decided to teach him at home. There he was allowed to study the subjects that most interested him. By age ten, Edison had built a science laboratory of his own. Edison got his first job at age twelve on the railway selling candy and newspapers. There he once saved a boy whose father was the boss of the railway station. In return the boss helped him a lot. In his late twenties, Edison built an "invention factory" where he and his business partners could devote all their time to inventing. After improving upon the telephone, Edison created the phonograph . Although Edison did not actually invent the light bulb, he did create an electric lighting system which led to its widespread use. Edison set up the first central electric power station in 1882, so New York became the first city in the world to have electric lights. This was the beginning of the modern world in which electricity became a way of life. The following year, one of Edison's engineers discovered electrons , which at last led to electronics. Without electronics, we might not have radio, TV, computers, or space travel. The rest of Edison's life was spent making and improving inventions. Thomas Edison died at the age of eighty-four in 1931. Three days later, much of America dimmed its lights in honor of the inventor--a man who had more impact on the development of present-day civilization than anyone else in history. Question: The best title for this passage is _ . Yes or no, is the answer "Edison, a Great Inventor"?
Yes

Q: Article: Everyone wants to know the secrets of a long and healthy life. Here are some discoveries from health experts. Many studies looking into the lives of centenarians look at what they eat. Many people who live into their hundreds live in the Mediterranean , so their diet, which is high in fruits, vegetables, nuts, and healthy fats like olive oil, gets a lot of attention. The diet has been linked to a healthier older age, lower risk for heart disease, and even protection against memory loss. Education is related to a longer life. A 2012 report from the CDC's National Center for Health Statistics found that people with a bachelor's degree or higher live about nine years longer than people who don't graduate high school. James Smith, a health economist at the RAND Corporation, is also a supporter of the argument for staying in school for better life expectancy. His findings show education should be an even bigger factor than race and income. Educated people are more likely to land better jobs, plan for their future, and make healthier lifestyle choices. Being a hard worker doesn't necessarily mean job-stress will harm you. The Longevity Study found that plenty of hard workers lived long lives. "Skeptics may wonder if hard workers really are enjoying life." the authors write, "We found that productive, hardworking people (even in old age) are not stressed or miserable, but tend to be happier, healthier, and more socially connected than their less productive peers." Having a strong social group is associated with a longer life. We often turn to friends and family for support, and taking care of the people that matter to us may help us take better care of ourselves, some evidence shows. Some research even suggests that immune function is improved when we are around our friends, and that they help with stress management. Research shows that sitting for long period of time put people at risk for shorter lifespans and other health risks. A 2011 study found that each hour people spent sitting down and watching TV after... Question: The passage is mainly about _ . Yes or no, is the answer "some discoveries on health"?
A: No

Article: Frank was a barber and my grandma Joan was a hairdresser, who moved from London to Rugby and then settled in Cambridge. The worked together in their own shop on Mill Road, and it was above it that my mother and my two older sisters were born. I remember visiting them often at the salon and sitting in the back room eating my lunch, which always seemed to be a boiled egg. I can still recall the burst linoleum ,the almost overpowering smell of hairdresser s chemicals, the barber s shop was at the front and the ladies' salon at the back. They was always barber's banter and customers would try to talk to me, but I mistrusted strangers and was not interested, much to my grandpa's disgust. Frank was a conscientious objector in the second world war and was sent to Bedford prison, Later, he was sent to a prisoner-of-war camp for hard labor, and to guard the prisoners. He made good friends with some of the Italians and after war they visited each other for many years until they all became too old to travel. Grandma was a fantastic cook and picked up a lot of Italian cookery tips on her visits. She could make a delicious meal from basic materials and was a very inventive person, who recycled long before it was fashionable. That generation lived through hard times and two world wars. They were resourceful through necessity, making use and re-using whatever they could. Although my grandfather was a _ man who could be quite difficult sometimes, they were devoted to each other and spent many happy years together. My grandma had a heavy stroke in her 90s and was never the same again, as though part of her brain had been switched off. She tried hard to carry on with her cooking, sewing and knitting etc, but it became too much of a challenge. She died a few years later in 1998, and it broke Frank's heart. Exactly a year later, Frank died, aged 91. The nurse who was with him when he died said his last words were: "I'm coming. Joan." Question: The author's attitude to the customers made grandpa _ . Yes or no, is the answer "unhappy"?
Yes