<http://schema.org/image_url>
"http://media.al.com/sports_impact/photo/cedric-clayborn-11032012-90458935550c4b2f.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.al.com/sports/index.ssf/2012/11/alabama_am_needs_win_at_jackso.html>