<http://schema.org/target>
"https://mobile.audible.com/search.htm?keywords={search_term_string}"^^<http://www.w3.org/2001/XMLSchema#string>
<https://mobile.audible.com/pd/Radio-TV/The-News-from-Lake-Wobegon-from-A-Prairie-Home-Companion-December-18-2010-Audiobook/B003HHF4IG>