About: http://webisa.webdatacommons.org/426794037

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 saw import under tools" menu, but do not expect that it only be able to import address-books.But using this addon we can also import/export mails/folders as mbox, eml and other formats.
http://www.w3.org/ns/prov#wasQuotedFrom	mozilla.org