<http://schema.org/image_url>
"http://media.nola.com/politics/photo/rep-walt-leger-iiijpg-22e2d2460534363d.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.nola.com/politics/index.ssf/2012/03/reader_comment_investing_in_yo.html>