<http://schema.org/image_url>
"http://media.al.com/auburnfootball_impact/photo/tre-williamsjpg-d23d681e5bcdd3ba.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.al.com/auburnfootball/index.ssf/2013/05/tre_williams_auburn_recruiting.html>