<http://schema.org/target>
"http://www.audible.com/search?advsearchKeywords={search_term_string}"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.audible.com/pd/Sci-Fi-Fantasy/The-Last-Hunter-Descent-Audiobook/B006JSVSLC?ref_=listener__c1_4>