<http://schema.org/image_url>
"http://media.al.com/entertainment_impact/photo/harrisonfordairforceonejpg-cd0f4d0709142fbf.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.al.com/entertainment/index.ssf/2014/02/poll_who_was_tv_and_films_best.html>