<http://schema.org/description>
"In just over 150 years, global oil production has made possible everything from manufacturing to transportation. See how much you know about where that oil comes from and how it&amp;#039;s extracted with this quiz."^^<http://www.w3.org/2001/XMLSchema#string>
<http://auto.howstuffworks.com/fuel-efficiency/fuel-economy/global-oil-production-quiz2.htm>