<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.tanga.com/users/new?return_path=%2Fdeals%2F20068c3e30fe%2Ffree-stainless-steel-ring-grid-black%3Finternal_campaign%3Dchannel>