About: http://webisa.webdatacommons.org/131092071

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 exemplary embodiments, the hidden signature object is a value that is the encoding of the following fields: web page hash, action, date/time, key identifier and digital signature.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com