About: http://webisa.webdatacommons.org/404832257

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	isotopes such as potassium-40 are in the biosphere now, and they were probably
http://www.w3.org/ns/prov#wasQuotedFrom	grisda.org