About: http://webisa.webdatacommons.org/363001312

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	None of the symbols a1, b1, c1, a2, b2, c2, or nil is an otherwise inaccessible part of x or y because each is interned and hence accessible by the package (or packages) in which it is interned.
http://www.w3.org/ns/prov#wasQuotedFrom	cmu.edu