<http://schema.org/image_url>
"http://media.al.com/sports_impact/photo/john-l-smithjpg-2ac3e1d62dd654da.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.al.com/sports/index.ssf/2013/01/former_arkansas_coaches_john_l.html>