About: http://webisa.webdatacommons.org/262454819

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 I can see it is possible is : Remove the user from everywhere you have assigned it in model (eg key metrics, constraints, security filters, analysis types etc.) and then export and then import it.
http://www.w3.org/ns/prov#wasQuotedFrom	oracle.com