PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • As salts are neutrally charged, these ions form compounds such as sodium oxide Na2O or magnesium chloride MgCl2.
http://www.w3.org/ns/prov#wasQuotedFrom
  • schools-wikipedia.org