<http://schema.org/image_url>
"http://media.al.com/business_impact/photo/home-sales-ap-photo-amy-sancettajpg-0d44416e873f44a5.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.al.com/business/index.ssf/2013/06/average_price_of_homes_in_the.html>