About: http://webisa.webdatacommons.org/113188682

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	They can detect redundant quotation of prior emails, web pages, and other documents, and not store the extra copies.
http://www.w3.org/ns/prov#wasQuotedFrom	buzzmachine.com