About: http://webisa.webdatacommons.org/403792783

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	You mentioned slavery, there was a time when slavery was widely acceptable, it took centuries for it to be considered immoral.
http://www.w3.org/ns/prov#wasQuotedFrom	occupywallst.org