About: http://webisa.webdatacommons.org/30985607

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	For our purpose, only the last two types of exchange are important, for these constitute the circulation of currency.
http://www.w3.org/ns/prov#wasQuotedFrom	econlib.org