<http://schema.org/description>
"Mongol Empire, a vast Eurasian empire of the 13th and 14th centuries. It was founded by Genghis Khan (1162 - 1227), a Mongol chieftain who became a mighty conqueror."^^<http://www.w3.org/2001/XMLSchema#string>
<http://history.howstuffworks.com/asian-history/mongol-empire.htm>