<http://schema.org/image_url>
"http://media.nj.com/star-ledger/photo/2013/04/-0b175c2f962b7a03.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://photos.nj.com/4504/gallery/rutgers_football_spring_practice_on_april_9_2013/index.html>