<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.audible.de/pd/Kinder-Hoerbuecher/Cucu-la-praline-est-en-pleine-forme-Cucu-la-praline-2-Hoerbuch/B01G27Q198>