| http://www.w3.org/ns/prov#value | - 2000 yrs ago, our ancestors had ideas about all the modern technology and gadgets we have today, such as guns, computer, laptop, tablet, iPod, iPad, cellphone, internet, cars, ships, airplane, submarine, air-conditioning, motorcycle, atomic energy, solar energy, vitamins, supplements, different types of food, but they could not develop the technology to produce them.
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