PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • In practice, a disinfectant such as chlorine is introduced at a point in the wastewater treatment system after which sufficient time, either by flow into a storage tank orthrough a region of flow, occurs to permit the chlorine to effectively disinfect the contaminant-bearing wastewater.
http://www.w3.org/ns/prov#wasQuotedFrom
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