#agent.causal_agent  a substance that exerts some force or effect
  subtype:  #antiflatulent  #antifungal_agent  #disinfectant  #drug  #vermicide  #gastric_antacid  #bacteriostat  #bleaching_agent  #chemical_agent  #coagulant  #coolant  #dilutant  #emmenagogue  #galactagogue  #hypnagogue  #hypoglycemic_agent  #inducer  #lactifuge  #lactogen  #mitogen  #precipitant  #solvating_agent  #viricide
  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

1 statement is about an indirect instance of #agent.causal_agent (#Bordeaux_wine__Bordeaux): vin#graph1_on_production
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