<http://schema.org/image_url>
"http://media.nola.com/tpphotos/photo/2009/05/flags-flying-166c541d99cd1cfd.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.nola.com/politics/index.ssf/2011/11/whats_on_the_november_19_ballo.html>