About: http://webisa.webdatacommons.org/76357201

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	One way is to work in a first-order theory with two sorts, sets and urelements, with a ??? b only defined when b is a set.
http://www.w3.org/ns/prov#wasQuotedFrom	wikipedia.org