#exercising_weight__weight  equipment used in calisthenic exercises and weightlifting
  supertype:  sports_equipment__sporting_goods  equipment needed to participate in a particular sport
  subtype:  barbell  a bar to which heavy discs are attached at each end; used in weightlifting
  subtype:  dumbbell  an exercising weight; two spheres connected by a short bar that serves as a handle

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