<http://schema.org/about>
"Video: Chuck Leavell, keyboardist for The Rolling Stones and the cofounder of MNN, explores the national wildlife refuge system."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/wilderness-resources/videos/in-the-green-room-the-national-wildlife-refuge-system>