<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/ListItem>
<http://www.discountfilterstore.com/pool-and-spa-filters.html?amp%3Border=position&amp%3Bsize_pool_spa_length_range=21+-+24&dir=desc&manufacturer_pool_spa=Waterworks>