About: http://webisa.webdatacommons.org/181715052

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	SPF, then, is an attempt to prevent forging of the envelope sender, not the header sender.
http://www.w3.org/ns/prov#wasQuotedFrom	ibm.com