About: http://webisa.webdatacommons.org/70608217

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	Some are simple signatures, others signed photographs, and many are letters and other documents written by their notable signers.
http://www.w3.org/ns/prov#wasQuotedFrom	rarebookhub.com