#section.musical_organization  a division of an orchestra containing all instruments of the same class
  supertype:  #musical_organization__musicalorganization__musicalgroup  an organization of musicians who perform together
  subtype:  #string_section  #rhythm_section  #brass_section  #reed_section
  part of:  #orchestra  instrumentalists including string players
  part of:  #band.musical_organization  instrumentalists not including string players

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