PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • ???Air pollution is a complex and pervasive public health problem,??? Kensler said. ???Government leaders and policy makers [need to] define and implement more effective regulatory policies to improve air quality.???
http://www.w3.org/ns/prov#wasQuotedFrom
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