<http://schema.org/image_url>
"http://media.al.com/sports_impact/photo/bopeliniapjpg-60b233704c1b1a9d.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.al.com/sports/index.ssf/2014/06/early_signing_date_nebraskas_b.html>