PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Lithium is an element in the alkali metals class of the periodic table.[1] It is the lightest solid element -- about half the density of water.
http://www.w3.org/ns/prov#wasQuotedFrom
  • conservapedia.com