About: http://webisa.webdatacommons.org/5567882

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	Cowrie shells were used as a form of currency and gold, salt and copper were traded.Between 1450-1550, the Songhay kingdom grew very powerful and prosperous.
http://www.w3.org/ns/prov#wasQuotedFrom	e2bn.org