PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The page retrieval engine is relatively simple but does incorporate features such as queuing requests and balancing the load from multiple search processes, and delaying requests to the same site to prevent overloading a site.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.co.uk