<http://schema.org/description>
"The biodiesel quiz will test your knowledge about biodiesel components, biofuel history and biodiesel pros and cons. Take the quiz and see how much you know about how biodiesel works."^^<http://www.w3.org/2001/XMLSchema#string>
<http://auto.howstuffworks.com/fuel-efficiency/alternative-fuels/biodiesel-quiz9.htm>