#professional_relation  the relation that exists when one person requests and is granted professional help from a qualified source
  subtype:  medical_relation  legal_relation  academic_relation
  supertype:  social_relation  a relation between living organisms (especially between people)
     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

No statement uses or specializes professional_relation; click here to add one.