About: http://webisa.webdatacommons.org/338478376

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 earth is a source of terrestrial radiation, and radioactive materials which are naturally-occurring, such as uranium, radium and thorium are found in rock and soil.
http://www.w3.org/ns/prov#wasQuotedFrom	amherst.edu