PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • It is possible that there is or has been a small ammonia spike without accurate water test it is difficult to say what the problem is for certain.
http://www.w3.org/ns/prov#wasQuotedFrom
  • tropicalfishkeeping.com