<http://schema.org/image_url>
"http://media.al.com/business_impact/photo/--5169866-origjpg-277f21949133229a.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.al.com/business/index.ssf/2014/02/two_art_galleries_clothing_bou.html>