About: http://webisa.webdatacommons.org/309829574

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 only way they will know is if they notice a friend disappearing from their list or otherwise check your profile, latest news or other service that you have configured to be available to your friends only.
http://www.w3.org/ns/prov#wasQuotedFrom	ratepubs.com