<http://schema.org/about>
"Reader Jacob Varghese asked yesterday \"what's the difference between ethanol and biodiesel? which one is better, cheaper...\"  While some of us responded \"Well, that's the fundamental philosophical question of our day (or, at the very least, the $64,000"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/renewable-energy/ethanol-vs-biodiesel-just-the-facts.html>