<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.protothema.gr/greece/article/296081/dieukriniseis-tou-ges-gia-tin-ptosi-mi-epandromenou-aeroskafous-sta-megara/>