<http://schema.org/image_url>
"http://media.al.com/sports_impact/photo/img-5360-001jpg-53264c6a5c7cacc4.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.al.com/sports/index.ssf/2013/02/braves_players_meet_with_child.html>