About: http://webisa.webdatacommons.org/375175251

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	messages sent from one user to another, as well as messages sent from a machine, such as a PC,
http://www.w3.org/ns/prov#wasQuotedFrom	slideshare.net