<http://schema.org/about>
"With the release of the new versions of the Kindle and Kindle Fire, you may be tempted to upgrade. If you do, here are five places to resell your old one and extend its life."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/gadgets/5-places-resell-your-old-kindle.html>