<http://schema.org/image_url>
"http://media.al.com/business_impact/photo/powell-schooljpg-ca771e0c49c47fce.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.al.com/business/index.ssf/2014/01/powell_school_joins_projects_t.html>