<http://schema.org/image_url>
"http://media.al.com/sports_impact/photo/reuben-fosterjpg-000f1051026e6bbb.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.al.com/sports/index.ssf/2013/02/did_reuben_foster_make_the_rig.html>