About: http://webisa.webdatacommons.org/207084051

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	So there is no such thing as needing to unsubscribe from something to which I have not already subscribed. (This sounds morally and logically obvious to me, but it took an Act of Parliament to make it unequivocal.)
http://www.w3.org/ns/prov#wasQuotedFrom	sophos.com