<http://schema.org/image_url>
"http://media.al.com/sports_impact/photo/andrewwilliamsrivalsjpg-42f6894e578a07ba.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.al.com/sports/index.ssf/2014/01/four-star_de_andrew_williams_t.html>