<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%2F50bc3578f4%2Fkitchen-play-set-with-mixer-and-tools%3Finternal_campaign%3Dchannel>