<http://schema.org/image_url>
"http://media.nola.com/politics/photo/jim-demintjpg-da9055d95bd56f0f.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.nola.com/politics/index.ssf/2012/12/sc_sen_jim_demint_resigning_to.html>