<http://schema.org/query-input>
"required name=search_term_string"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.audible.com/pd/Bios-Memoirs/How-Proust-Can-Change-Your-Life-Audiobook/B004D5GAEI?ref_=pr_rev_1_5>