#mutual_understanding__mutual_affection  sympathy of each person for the other
  supertype:  sympathy  a relation of affinity or harmony between people; whatever affects one correspondingly affects the other; "the two of them were in close sympathy"
     supertype:  kinship__affinity  a close connection marked by community of interests or similarity in nature or character: "found a natural affinity with the immigrants"; "felt a deep kinship with the other students"; "anthropology's kinship with the humanities"
        supertype:  relation  an abstraction belonging to or characteristic of two entities or parts together
           supertype:  thing_that_can_be_seen_as_a_relation  usable as relation type
              supertype:  thing_playing_some_role  category to classify things according to roles/viewpoints; classification under this category is application-dependant
                 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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