About: http://webisa.webdatacommons.org/134276198

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 am using that very extension method you link to in my examples #1 and #3 and writing the corresponding code in the real app was the occasion where I discovered that there is some sort of alternative to Predicate<T> at all.
http://www.w3.org/ns/prov#wasQuotedFrom	codeguru.com