PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • BACKGROUND OF THE INVENTION Industrial air emissions are often cited as a source of various environmental problems, such as ozone layer depletion, global warming, and acid rain, not to mention health related issues for those individuals working or residing in affected areas.
http://www.w3.org/ns/prov#wasQuotedFrom
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