<http://schema.org/image_url>
"http://media.al.com/sports_impact/photo/clintmoseley92yeagerjpg-8cb6adcb01b6fce8.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.al.com/sports/index.ssf/2011/04/auburns_spring_practice_is_in.html>