About: http://webisa.webdatacommons.org/197944511

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	I use it with DevonThink Pro and the interface is pretty seamless though the document storing and saving scheme is a bit odd, but easy enough to figure out and rejigger.
http://www.w3.org/ns/prov#wasQuotedFrom	pricegrabber.com