About: http://webisa.webdatacommons.org/406601078

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	These elements can be found naturally in certain types of rock, including granite, igneous and limestone, as well as in soil and water.
http://www.w3.org/ns/prov#wasQuotedFrom	radonsystem.com