About: http://webisa.webdatacommons.org/377544852

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 an easy way to find examples is to find one in which there is an element that is in both $A$ and $C$; then it will be on the left-hand side but not on the right-hand side.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com