<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.audible.de/pd/English-Mysteries-Thrillers/Millennium-1-Los-hombres-que-no-amaban-a-las-mujeres-Hoerbuch/B011842NSS>