#crack  a purified and potent form of cocaine that is smoked rather than snorted
  supertype:  cocaine__cocain__coke__snow__C  a narcotic (alkaloid) extracted from coca leaves; used as a surface anesthetic or taken for pleasure; can become addictive
     supertype:  hard_drug  a narcotic that is considered relatively strong
        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:  thing_playing_some_role  category to classify things according to roles/viewpoints; classification under this category is application-dependant
                       supertype:  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

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