<http://webisa.webdatacommons.org/prov/75297317>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/76994130> .
<http://webisa.webdatacommons.org/76994130>	<http://www.w3.org/ns/prov#value>	"Crops such as sugar cane, tobacco and cotton required an unlimited and inexpensive supply of strong backs to assure timely production for the European market." .
<http://webisa.webdatacommons.org/prov/172900936>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/76994130> .
<http://webisa.webdatacommons.org/prov/491643828>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/76994130> .
<http://webisa.webdatacommons.org/76994130>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<saveyourheritage.com> .
<http://webisa.webdatacommons.org/76994130>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .