About: http://webisa.webdatacommons.org/455184605

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 think this control is a good start and as you say plenty still to be done.
http://www.w3.org/ns/prov#wasQuotedFrom	codeproject.com