About: http://webisa.webdatacommons.org/335432717

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	sounds to me like one user is an external user and the other internal...have a look at site settings > Users and Permissions
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com