About: http://webisa.webdatacommons.org/42054521

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	If an ad does not already exist in the caching server's file cache, the caching system automatically downloads (via HTTP) requested ad and other data from the central server over a secure VPN connection.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk