<http://schema.org/image_url>
"http://media.nola.com/politics/photo/sen-danny-martinyjpg-5137b8bcf3b5b125.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.nola.com/politics/index.ssf/2012/05/expanded_parole_bill_nearing_f.html>