<http://schema.org/image_url>
"http://media.al.com/birmingham-news/photo/2011/11/-9310bdb479a5a79b.JPG"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.al.com/sports/index.ssf/2011/11/special_teams_decides_game_of.html>