#piano_music.sheet_music__pianomusic  sheet music to be played on a piano
  supertype:  #sheet_music__sheetmusic__music  a musical composition in printed or written form; "she turned the pages of the music as he played"
     supertype:  #musical_composition__musicalcomposition__opus__composition__piece__piece_of_music  a musical work that has been created; "the composition is written in four movements"
        supertype:  #creation_result__creation  an artifact that has been brought into existence by someone
           supertype:  pm#owned_entity__ownedentity
              supertype:  pm#entity_playing_some_role  e.g., an agent, an owner
                 supertype:  pm#entity  something that can be "involved" in a situation
                    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_that_can_be_seen_as_a_relation  usable as relation type
                    supertype:  pm#thing_playing_some_role  category to classify things according to roles/viewpoints; classification under this category is application-dependant
                       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#created_thing__createdthing  e.g., entity or situation that results from a process; in WordNet, #creation_result is for entities while #resultant is for situation
              supertype:  pm#thing_playing_some_role  category to classify things according to roles/viewpoints; classification under this category is application-dependant

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