About: http://webisa.webdatacommons.org/157350136

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 also still maintained (thanks to cheap labor students at Berkeley), open-source, and very portable (I have run it on various flavors of UNIX, including Linux, and various processor architectures as well).
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com