<http://schema.org/image_url>
"http://media.al.com/sports_impact/photo/ingram-water-break-almondjpg-0447f2e8a030c8f1.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.al.com/sports/index.ssf/2010/08/catching_up_with_heisman_troph.html>