<http://schema.org/image_url>
"http://media.masslive.com/republican/photo/2012/02/-1887e4d04a0462c1.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://photos.masslive.com/4502/gallery/nfl_free_agent_wide_receivers_12_options_the_patriots_may_consider/index.html>