<http://schema.org/image_url>
"http://media.mlive.com/grpress/sports_impact/photo/basketballholder-girlsjpg-e00241b5cb89d8c5.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mlive.com/sports/grand-rapids/index.ssf/2013/08/michigan_high_school_athletes.html>