About: http://webisa.webdatacommons.org/327477218

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	They include account books and ship manifests documenting the financial aspects of the slave trade, legal documents such as birth certificates and deeds of manumission, and political as well as polemical works.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com