#squadron  an air force unit larger than a flight and smaller than a group
  supertype:  #air_unit__airunit  a military unit that is part of the airforce
  subtype:  #escadrille  a air force squadron typically containing six airplanes (as in France during World War I)
  member of:  #wing.air_unit  a unit of military aircraft
     member of:  #division.air_unit  a unit of the United States air force usually comprising two or more wings

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