<http://schema.org/image_url>
"http://media.nola.com/politics/photo/rivertown-from-above-e5e61c3b3530b76a.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.nola.com/politics/index.ssf/2012/11/kenner_considers_politicians_w.html>