<http://webisa.webdatacommons.org/12836986>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/150298968>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/12836986> .
<http://webisa.webdatacommons.org/12836986>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<pbs.org> .
<http://webisa.webdatacommons.org/12836986>	<http://www.w3.org/ns/prov#value>	"Many, including at least one president, fathered children from their female slaves." .