PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Carbon dioxide is a greenhouse gas, its atmospheric concentration has been rising since the beginning of the Industrial Age, Earth???s temperature is rising???these are empirical facts.
http://www.w3.org/ns/prov#wasQuotedFrom
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