About: http://webisa.webdatacommons.org/448940358

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	I am guessing 1950s - 60s, but have nothing other than look to base that on.
http://www.w3.org/ns/prov#wasQuotedFrom	glassmessages.com