#rental_income  income received from rental properties
  supertype:  income  the financial gain (earned or unearned) accruing over a given period of time
     supertype:  financial_gain__financialgain  the amount of monetary gain
        supertype:  gain__benefit  the amount by which the revenue of a business exceeds its cost of operating
           supertype:  sum_of_money__sum__amount_of_money  a quantity of money; "he borrowed a large sum"; "the amount he had in cash was insufficient"
              supertype:  assets  anything of material value or usefulness
                 supertype:  possession  anything owned or possessed
                    supertype:  owned_entity__ownedentity
                       supertype:  entity_playing_some_role  e.g., an agent, an owner
                          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:  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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