<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.audible.com/pd/Bios-Memoirs/When-You-Are-Engulfed-in-Flames-Audiobook/B002V1BQ1I?ref_=pr_rev_1_6>