<http://schema.org/image_url>
"http://media.al.com/sports_impact/photo/mobile-baybears-celebratejpg-052e1105edd7c8d2.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.al.com/sports/index.ssf/2013/06/david_holmberg_pitches_one-hit.html>