About: http://webisa.webdatacommons.org/264206384

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	It could well have been in one form or other of the document that used to be at ftp://info.cern.ch/pub/www/doc/http-spec.txt starting in 1991, should anyone have an archive copy.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com