About: http://webisa.webdatacommons.org/351446420

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	Separate bi-directional handshakes and control signals or levels may be used as a signaling protocol for such events as request to copy, ready to copy, copy complete, data received, and the like.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com