<http://schema.org/about>
"What do the Queen of England, the rapper 50 Cent and George Bush have in common? It is not their political persuasion, the cars they drive or their bankers. They all have homes heated and cooled with geo-exchange heat pumps."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/renewable-energy/zerofootprint-strange-bedfellows.html>