<http://schema.org/image_url>
"http://media.oregonlive.com/oregonian/photo/2015/06/03/trsistersrodeogroundsjpg-7ca562155775203f.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://photos.oregonlive.com/4450/gallery/metolius_basin/index.html>