About: http://webisa.webdatacommons.org/156243489

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	Also, each message and acknowledgment has a boolean variable indicating whether that message or acknowledgment was sent before or after the sender of that message or acknowledgment had recorded its state.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com