<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/BreadcrumbList>
<http://www.discountfilterstore.com/lennox-air-filters.html?brand=Lennox&life_months=6&merv=MERV%3A8&size_advertised=20+x+21+x+5>