#presiding_officer__presidingofficer  the leader of a group meeting
  supertype:  #leader  a person who rules or guides or inspires others
  subtype:  #moderator.presiding_officer  someone who presides over a forum or debate
  subtype:  #chairman__president__chairwoman__chair  the officer who presides at the meetings of an organization
     subtype:  #vice_chairman  one ranking below or serving in the place of a chairman
  subtype:  #Speaker  the presiding officer of a deliberative assembly; "the leader of the majority party is the Speaker of the House of Representatives"

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