PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • But as seawater acidifies, it becomes undersaturated in calcite and aragonite, forms of calcium carbonate vital to shell formation.
http://www.w3.org/ns/prov#wasQuotedFrom
  • onearth.org