About: http://webisa.webdatacommons.org/308900329

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	The reason to write your own is normally that the object manages some sort of resource, and in that case there will be a difference between two pointers to the same thing and two pointers to different things.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com