<http://schema.org/image_url>
"http://media.silive.com/northshore/photo/ymcajpg-d29790ff826bea94.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.silive.com/northshore/index.ssf/2012/03/start_making_summer_camp_plans.html>