<http://schema.org/image_url>
"http://media.nj.com/politics_impact/photo/todd-akinjpg-5b552611b30aeffb.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.nj.com/politics/index.ssf/2012/08/gov_christie_missouri_congress.html>