<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.sintagesmamas.com/%CF%83%CE%BF%CF%85%CF%80%CE%B9%CE%AD%CF%82-%CE%BC%CE%B5-%CF%83%CF%80%CE%B1%CE%BD%CE%AC%CE%BA%CE%B9>