PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • However, geologic processes can form concentrations of naturally radioactive elements, especially uranium and radium.How does radium get into the environment from a nuclear reactor? ??? Radium can also be produced in the body from ???parent??? radionuclides (uranium and thorium).
http://www.w3.org/ns/prov#wasQuotedFrom
  • enformable.com