About: http://webisa.webdatacommons.org/59906962

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 answer is that there is a save method which saves the current state to an internal stack of states and a restore method that sets the state to the current top of stack.
http://www.w3.org/ns/prov#wasQuotedFrom	i-programmer.info