<http://schema.org/image_url>
"http://media.nola.com/tpphotos/photo/2010/11/-ff2d3f3e1e05aa0a.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://photos.nola.com/4500/gallery/new_orleans_saints_vs_dallas_cowboys_november_25_2010/index.html>