<http://schema.org/image_url>
"http://media.gulflive.com/mississippi-press-news/photo/mdotjpg-761365d7967fa732.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://blog.gulflive.com/mississippi-press-news/2013/12/mdot_announces_bridge_closure.html>