<http://webisa.webdatacommons.org/179782406>	<http://www.w3.org/ns/prov#value>	"Slavery was a central fact of the Brazilian economy." .
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<http://webisa.webdatacommons.org/prov/72019152>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/179782406> .
<http://webisa.webdatacommons.org/179782406>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<wordpress.com> .