About: http://webisa.webdatacommons.org/410771391

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	If the proxy server is other than SOCKS5 (inevitably it is SOCKS4), you must give c<$socks_version> (i.e. 'socks_version' => 4).
http://www.w3.org/ns/prov#wasQuotedFrom	cpan.org