<http://schema.org/image_url>
"http://media.al.com/business_impact/photo/2013-m-classjpg-c08b80214b9a0391.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.al.com/business/index.ssf/2014/01/watch_an_alabama-made_m-class.html>