<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.wermuth.de/Wasserkocher/48046003_KitchenAid-Artisan-5-KEK-1522-EMS-Wasserkocher-medallion-silber.html>