About: http://webisa.webdatacommons.org/173871892

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	Then, when the user types in their email/username and password, you simply need to so:
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com