About: http://webisa.webdatacommons.org/9464696

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	Includes Samuelson's professional correspondence not only with economists, but with organizations and professionals in other domains, including political figures such as Presidents John F. Kennedy, Jimmy Carter, and Bill Clinton.
http://www.w3.org/ns/prov#wasQuotedFrom	duke.edu