About: http://webisa.webdatacommons.org/180323108

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	The gamma rays were from the decay of the naturally-radioactive elements K, Th, and U and from cosmic-ray interactions with H, O, Mg, Al, Si, Ca, Ti, Fe, and other elements.
http://www.w3.org/ns/prov#wasQuotedFrom	science.gov