<http://schema.org/image_url>
"http://media.masslive.com/sports_impact/photo/byersjpg-aab9958057ad94ca.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.masslive.com/sports/index.ssf/2011/12/springfield_falcons_captain_da.html>