#biotic_community__community  (ecology) a group of interdependent organisms inhabiting the same region and interacting with each other
  subtype:  biome  a major biotic community characterized by the dominant forms of plant life and the prevailing climate
  supertype:  group__grouping  any number of entities (members) considered as a unit
     supertype:  collection  something gathering separated things (entities/situations)
        supertype:  divisible_entity__divisibleentity  many classifications under this category are application-dependant
           supertype:  entity  something that can be "involved" in a situation
              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
           supertype:  divisible_thing__divisiblething
              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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