<http://schema.org/image_url>
"http://media.al.com/sports_impact/photo/albertmitchell-alcom-photojpg-5e2cd0bb6d8d57a6.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.al.com/sports/index.ssf/2013/01/nashville_quarterback_albert_m.html>