About: http://webisa.webdatacommons.org/316432985

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	It features a database of over 20,000 primary source materials including photographs, political cartoons, and texts (speeches, letters, and other historical documents).
http://www.w3.org/ns/prov#wasQuotedFrom	tenement.org