About: http://webisa.webdatacommons.org/442554978

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	Scientists first postulated their existence in the 1930s, and believe that they are generated by nuclear fusion in stars and possibly by supernovas and other violent cosmic events, as well as by nuclear reactors and nuclear bombs.
http://www.w3.org/ns/prov#wasQuotedFrom	hcn.org