<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.ezvacuum.com/vacuum-cleaner-bags-c-1/evolution-vacuum-bags/evolution-light-upright-vacuum-cleaner-paper-bags-for-dcc658-5-pack-genuine-p-3563.html>