#cyclopropane  a colorless flammable gas sometimes used as an inhalation anesthetic
  supertype:  #inhalation_anesthetic__inhalation_anaesthetic__inhalation_general_anesthetic__inhalation_general_anaesthetic  a gas that produces general anesthesia when inhaled
     supertype:  #general_anesthetic__generalanesthetic__general_anaesthetic__generalanaesthetic  an anesthetic that anesthetizes entire body and causes loss of consciousness
        supertype:  #anesthetic_agent__anesthetic__anaesthetic__anaesthetic_agent__anaestheticagent  a drug that causes temporary loss of bodily sensations
           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

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