About: http://webisa.webdatacommons.org/251873129

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 third member, uf_index, is just an IV that does not seem to be used for anything else other than as an identifier (that is what grepping through the 5.8.0 sources suggests).
http://www.w3.org/ns/prov#wasQuotedFrom	perl.org