<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.audible.com/pd/Bios-Memoirs/My-Foot-Is-Too-Big-for-the-Glass-Slipper-Audiobook/B00CDT80CQ?ref_=pd_rsp_2>