<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.sintagesmamas.com/%CE%BC%CE%B1%CE%BD%CE%B9%CF%84%CE%AC%CF%81%CE%B9%CE%B1-%CE%B3%CE%B5%CE%BC%CE%B9%CF%83%CF%84%CE%AC>