<http://schema.org/image_url>
"http://media.al.com/sports_impact/photo/phil-cunningham-2jpg-d14836798046cbed.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.al.com/sports/index.ssf/2013/03/troys_hartwell_says_cunningham.html>