<http://schema.org/image_url>
"http://media.silive.com/northshore/photo/rallyjpg-836529a6d593d001.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.silive.com/northshore/index.ssf/2010/08/all_day_rallies_protest_staten.html>