<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://workingperson.com/footwear-1/socks/insulated-socks/wigwam-socks-40-below-insulated-grey-twist-socks-f2230-050-2535.html>