#stairhead  platform at the top of a staircase
  supertype:  #platform  a raised horizontal surface; "the speaker mounted the platform"
  part of:  #stairway__staircase__stairs__steps__step  a way of access consisting of a set of steps
     part of:  #edifice__building  a structure that has a roof and walls and stands more or less permanently in one place; "there was a three-story building on the corner"; "it was an imposing edifice"

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