<http://schema.org/about>
"When I wrote a post entitled Arguments Against White Roofs in Northern Cities are Specious, I was complaining about the roofers who say that in cooler climates, white roofs can mean higher"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/green-architecture/the-best-of-all-possible-worlds-a-roof-that-changes-color-with-temperature.html>