PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Opioids are drugs that are either derived from opiates (drugs created directly from opium, such as morphine or codeine) or are chemically related to opiates or opium.
http://www.w3.org/ns/prov#wasQuotedFrom
  • ccatsober.org