<http://schema.org/image_url>
"http://media.nola.com/tv_impact/photo/matalincarvillejpg-f50b329d12ee0242.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.nola.com/politics/index.ssf/2012/11/james_carville_and_mary_matali_2.html>