<http://schema.org/about>
"Phone books are massive chunks of paper that get delivered to your door every year whether or not you actually use it. And really, who uses phone books anymore? Practically everyone looks up everything online, or with"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/clean-technology/say-no-to-phonebooks-campaign-works-to-end-an-old-school-waste-of-paper.html>