About: http://webisa.webdatacommons.org/382450733

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	In 1452, Pope Nicholas V issued the papal bull Dum Diversas, granting Afonso V the right to reduce Saracens, pagans and any other unbelievers" to hereditary slavery.
http://www.w3.org/ns/prov#wasQuotedFrom	wikipedia.org