#whistling  the act of whistling a tune; "his cheerful whistling indicated that he enjoyed his work"
  supertype:  music.recreation  a musical diversion; "his music was his central interest"
     supertype:  recreation__diversion  an activity that diverts or amuses or stimulates
        supertype:  activity  any specific activity or pursuit; "they avoided all recreational activity"
           supertype:  human_action__humanaction__act__human_activity__humanactivity  something that people do or cause to happen
              supertype:  process__proces  situation commonly considered as making a change during some period of time
                 supertype:  situation  something that "occurs" in a real/imaginary region of time and space
                    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:  process_or_process_description
                    supertype:  processing_thing
                       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
              supertype:  process__proces__physicalsituation  intuitively, the class of things that happen and have temporal parts or stages; examples include extended events like a football match or a race, actions like pursuing and reading, and biological processes; sumo#process is not identical to pm#situation because an instance of pm#situation is not necessarily an instance of sumo#physical
                 supertype:  situation  something that "occurs" in a real/imaginary region of time and space
                 supertype:  process_or_process_description
                 supertype:  physical__physical_thing  an entity that has a location in space-time; locations are themselves understood to have a location in space-time; click here for more details on the identical category sowa#physical_thing
                    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:  execution__performance__carrying_out__carrying_into_action  the act of performing; of doing something successfully; using knowledge as distinguished from merely possessing it; "they criticised his performance as mayor"; "experience generally improves performance"
        supertype:  action  something done (usually as opposed to something said); "there were stories of murders and other unnatural actions"
           supertype:  human_action__humanaction__act__human_activity__humanactivity  something that people do or cause to happen

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