PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The biosolids pH is depressed by an acidic material such as mineral or organic acid by mixing a sufficient quantity of acid to depress the pH of the mixture to less than 5.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com.au