<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<https://mobile.audible.com/pd/Radio-TV/Why-Does-Everyone-Hate-Flying-And-Other-Questions-Only-a-Pilot-Can-Answer-Audiobook/B01HFIMB3S>