<http://schema.org/image_url>
"http://media.mlive.com/baycitytimes/photo/2012/11/-f9ab6162677f56e3.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://photos.mlive.com/4468/gallery/sailboat_docked_at_skipper_buds_in_bay_city_catches_fire/index.html>