<http://schema.org/image_url>
"http://media.pennlive.com/patriot-news/photo/2011/09/-b249dd1f32d73bdd.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://photos.pennlive.com/4503/gallery/penn_state_defeated_eastern_michigan_34-6/index.html>