About: http://webisa.webdatacommons.org/278613107

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	It is known that Aristotle, mistaking for an absolute sociological law a law relative to his own time, declared that slavery was a natural institution, and that men were divided, by Nature, into two classes ??? free men and slaves.
http://www.w3.org/ns/prov#wasQuotedFrom	marxists.org