PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Chemicals such as iron, tannins and humic acid are able to absorb UV light and thus reduce the amount available for disinfection.
http://www.w3.org/ns/prov#wasQuotedFrom
  • freedrinkingwater.com