About: http://webisa.webdatacommons.org/127327296

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	Materials represent themes such as slavery, abolition, the Underground Railroad, African Americans in politics and government, and religion.
http://www.w3.org/ns/prov#wasQuotedFrom	teachinghistory.org