<http://schema.org/image_url>
"http://media.masslive.com/republican/photo/2013/11/-c1cac87eacb6d7ca.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://photos.masslive.com/4502/gallery/boston_red_sox_world_series_parade__1/index.html>