<http://schema.org/image_url>
"http://media.al.com/news_impact/photo/7-5-low-tempsjpg-1e30eb04133955aa.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.al.com/news/index.ssf/2014/07/just_how_cold_did_it_get_last.html>