<http://schema.org/image_url>
"http://media.silive.com/northshore/photo/bypassjpg-e980aea05aa0c082.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.silive.com/northshore/index.ssf/2011/05/bariatric_surgery_can_help_tho.html>