<http://schema.org/image_url>
"http://media.masslive.com/sports_impact/photo/celtics18jpg-4c307fcd040bb4a0.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.masslive.com/sports/index.ssf/2013/04/raptors_rout_celtics_114-90_in.html>