About: http://webisa.webdatacommons.org/257548827

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	Next, in block 212 the HistoryLog field in the message block is cleared and set to indicate that the history log has been discarded (typically with a -1 value or other identifier).
http://www.w3.org/ns/prov#wasQuotedFrom	google.com