About: http://webisa.webdatacommons.org/146429390

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	You say all the user accounts were deleted from the machine, but you obviously have Active Directory if you are using GPO, and as such there should not be any local user accounts on the machine other than Administrator and Guest.
http://www.w3.org/ns/prov#wasQuotedFrom	serverfault.com