About: http://webisa.webdatacommons.org/368694893

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 think you actually want the USERS table to be the parent here, where STAFF and STUDENT are each types of users.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com