About: http://webisa.webdatacommons.org/451366442

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	In other words, you can implement e-mail or chat this way - each message is a document that you share with
http://www.w3.org/ns/prov#wasQuotedFrom	arstechnica.com