<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.lentiamo.gr/ygra-fakwn-epafhs/ygra-fakwn-epafhs-multi-purpose/ygra-dipli-suskeuasia/opti-free.html>