<http://schema.org/about>
"[This is a guest post by Steve Cohen, Executive Director of the Earth Institute and Director of the Master of Public Administration Program in Environmental Science and Policy at the School of International and Public Affairs at Columbia University."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/travel/new-york-city-sustainable-city.html>