PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • By Rev. La Roy Sunderland. (New York, American anti-slavery society, 1839), by La Roy Sunderland (page images at HathiTrust) The history of slavery and the slave trade, ancient and modern : the forms of slavery that prevailed in ancient nations, particularly in Greece and Rome, the African slave trade and the political history of slavery in the United States / compiled from authentic materials by
http://www.w3.org/ns/prov#wasQuotedFrom
  • upenn.edu