About: http://webisa.webdatacommons.org/151245135

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	During the seventeenth and eighteenth centuries, slavery spread to European colonies including America, where colonial legislatures defined the legal status of slaves as a form of property.
http://www.w3.org/ns/prov#wasQuotedFrom	wikipedia.org