#hard_drug  a narcotic that is considered relatively strong
  subtype:  #cocaine  #heroin
  supertype:  #narcotic  a drug that produces numbness or stupor; often taken for pleasure or to reduce pain; extensive use can lead to addiction
     supertype:  #drug  a substance that is used as a medicine or narcotic
        supertype:  #agent.causal_agent  a substance that exerts some force or effect
           supertype:  #causal_agent__cause__causal_agency  any entity that causes events to happen
              supertype:  pm#thing_playing_some_role  category to classify things according to roles/viewpoints; classification under this category is application-dependant
                 supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type

No statement uses or specializes #hard_drug; click here to add one.