<http://schema.org/image_url>
"http://media.al.com/spotnews/photo/school-supplies-alcom-file-photojpg-ee5af388e9cc003b.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.al.com/business/index.ssf/2013/07/alabamas_sales_tax_holiday_a_b.html>