About: http://webisa.webdatacommons.org/173411390

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 verifyUser() function would need to sanitize the user input and check the database for if the user exists and any other relation you may want to check (friends etc).
http://www.w3.org/ns/prov#wasQuotedFrom	dreamincode.net