<http://schema.org/image_url>
"http://media.al.com/news_mobile_impact/photo/image-full22gif-9cfe12ab492a77c2.gif"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.al.com/news/mobile/index.ssf/2014/07/thursdays_weather_chance_of_ra_1.html>