<http://schema.org/image_url>
"http://media.nj.com/star-ledger/photo/2014/01/-4560de2d048301ac.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.nj.com/politics/index.ssf/2014/03/live_video_chris_christie_holds_first_news_conference_in_76_days.html>