#colliery__pit  a workplace consisting of a coal mine plus all the buildings and equipment connected with it
  supertype:  workplace__work  a place where work is done; "he arrived at work early today"
  part:  coal_mine__coalpit  a mine where coal is dug from the ground
  part:  mine  excavation in the earth from which ores and minerals are extracted
     part:  adit  a nearly horizontal passage from the surface into a mine
     part:  mineshaft  excavation consisting of a vertical or sloping passageway for finding or mining ore or for ventilating a mine
     part:  shaft.passage  a vertical passage into a mine

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