<http://schema.org/image_url>
"http://media.nola.com/politics/photo/06yenni04jpg-b9df7e36e2f126d1.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.nola.com/politics/index.ssf/2014/04/rich_voters_more_likely_to_sup.html>