<http://webisa.webdatacommons.org/prov/307989844>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/192956437> .
<http://webisa.webdatacommons.org/192956437>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/192956437>	<http://www.w3.org/ns/prov#value>	"This was due the trans-Saharan trade between the northern parts of Nigeria and the western Sudan, Sahara, North Africa, Europe, the Nile Valley including Egypt and the Middle East." .
<http://webisa.webdatacommons.org/prov/162011900>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/192956437> .
<http://webisa.webdatacommons.org/prov/164289686>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/192956437> .
<http://webisa.webdatacommons.org/192956437>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<gamji.com> .
<http://webisa.webdatacommons.org/prov/308853697>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/192956437> .
<http://webisa.webdatacommons.org/prov/155427964>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/192956437> .