PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Normally, the compounds will be composed solely of carbon, hydrogen, oxygen, nitrogen, halogen and phosphorous, particularly carbon, hydrogen, oxygen, and nitrogen and where salts are involved, the appropriate metal counterion or ammonium counterion.
http://www.w3.org/ns/prov#wasQuotedFrom
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