<http://schema.org/image_url>
"http://media.nola.com/politics/photo/nikki-haley-bobby-jindaljpg-a6f818b92b4276a1.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.nola.com/politics/index.ssf/2012/03/gov_bobby_jindals_out-of-state.html>