#mine  excavation in the earth from which ores and minerals are extracted
  supertype:  #hole_in_the_ground__excavation  a hole in the ground made by excavating
  subtype:  #coal_mine  #copper_mine  #goldmine  #salt_mine  #silver_mine  #strip_mine  #sulphur_mine
  part of:  #colliery
  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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