<http://schema.org/description>
"Outgoing U.S. President Barack Obama gives his last commencement speech to graduates of the U.S. Air Force Academy in Colorado. Rough Cut (no reporter narration)."^^<http://www.w3.org/2001/XMLSchema#string>
<http://uk.reuters.com/video/2016/06/02/obama-tells-air-force-graduates-hell-mis?videoId=368752403>