<http://schema.org/image_url>
"http://media.al.com/business_impact/photo/indy-songerjpg-543f2cb756e8f6ec.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.al.com/business/index.ssf/2014/04/meet_indy_racers_tonight_at_th.html>