PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • ???As seawater is a complex buffer system, it???s pH is quite difficult to alter, particularly by a weak acid such as the carbonic acid produced when CO2 dissolves in water.???
http://www.w3.org/ns/prov#wasQuotedFrom
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