About: http://webisa.webdatacommons.org/189059459

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	Looking even further, it becomes clear that for both of the argument types the + operation is
http://www.w3.org/ns/prov#wasQuotedFrom	whitequark.org