#active_agent__active  chemical agent capable of activity
  supertype:  #chemical_agent  an agent that produces chemical reactions
     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 #active_agent; click here to add one.