<http://schema.org/image_url>
"http://media.nola.com/politics/photo/tim-barfield-horizontal-6db6f58fe91882a9.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.nola.com/politics/index.ssf/2013/10/state_confronts_more_complicat.html>