About: http://webisa.webdatacommons.org/415717880

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	So for example, A is a set, and a is an element in A. Same with B and b, and C and c.
http://www.w3.org/ns/prov#wasQuotedFrom	mathsisfun.com