PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Magnesium chloride, MgCl2, dissolved in seawater, is an abundant, natural source of the very useful metal magnesium.
http://www.w3.org/ns/prov#wasQuotedFrom
  • americanchemistry.com