About: http://webisa.webdatacommons.org/391339437

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 know nothing about them other than the fact that they worked when he passed away.
http://www.w3.org/ns/prov#wasQuotedFrom	amsat.org