pm#situation_categorized_in_an_ontology
  closed_exclusion:  pm#entity_categorized_in_an_ontology
  supertype:  pm#situation  something that "occurs" in a real/imaginary region of time and space
     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
  supertype:  pm#thing_categorized_in_an_ontology
     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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