#amphitheater__amphitheatre  a sloping gallery with seats for spectators (as in an operating room or theater)
  supertype:  gallery  narrow recessed balcony area along an upper floor on the interior of a building; usually marked by a colonnade
  part:  tiered_seats  seating that is arranged in sloping tiers so that spectators in the back can see over the heads of those in front

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