<http://schema.org/image_url>
"http://media.pennlive.com/patriot-news/photo/2013/05/-f12b9f59bb288da7.JPG"^^<http://www.w3.org/2001/XMLSchema#string>
<http://photos.pennlive.com/4503/gallery/bishop_mcdevitt_high_school_graduation_2013/index.html>