About: http://webisa.webdatacommons.org/325669873

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	Columbus, a slave trader himself, sent four ships to Spain in 1492, whose cargo were mainly slaves.
http://www.w3.org/ns/prov#wasQuotedFrom	webring.com