<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/Romance/How-to-Knit-a-Love-Song-Audiobook/B005DN8WSG/ref=pd_rsp_tl_rd_1>