PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Chemical fertilizers contain a percentage of nitrogen, phosphorus and potassium in varying quantities, which is called the NPK. The nitrogen is used to help plants grow faster and larger, mostly in the stems and leaves.
http://www.w3.org/ns/prov#wasQuotedFrom
  • gardeningcentral.org