About: http://webisa.webdatacommons.org/452292709

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The HTML mostly consists of links to Viagra, porn, and other random websites, and so it looks like these sites are making an attempt at SEO, but why the user-agent header?
http://www.w3.org/ns/prov#wasQuotedFrom	ckers.org