#hall  a large room for gatherings or entertainment; "lecture hall"; "pool hall"
  supertype:  #room  an area within a building enclosed by walls and floor and ceiling; "the rooms were very small but they had a nice view"
  subtype:  #beer_hall  a hall or barroom featuring beer and (usually) entertainment
  subtype:  #concert_hall__concerthall  a hall where concerts are given
  subtype:  #exhibition_hall__exhibition_area  a large hall for holding exhibitions
     subtype:  #palace.exhibition_hall  a large ornate exhibition hall
  subtype:  #floor.hall  the legislative hall where members debate and vote and conduct other business; "there was a motion from the floor"
  subtype:  #great_hall__greathall  the principle hall in a castle or mansion; can be used for dining or entertainment
     subtype:  #apadana  the great hall in ancient Persian palaces

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