About: http://webisa.webdatacommons.org/42554973

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	it is a bit more general, but if you are looking to speed up your pages there are a few things to consider, Google has a good list for this and Yahoo does too.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com