<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.wermuth.de/Unterbau-Spueler/46392143_Siemens-SN-48-R-563-DE-A-60cm-Extraklasse-Unterbaugeraet-Edelstahl.html>