About: http://webisa.webdatacommons.org/408380580

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	I didn??t feel comfortable using one of those solutions, because I had the feeling that there must be (1) a reason that there is a System.keychain, and (2) that it does not have a keyword that is known by the user.
http://www.w3.org/ns/prov#wasQuotedFrom	macworld.com