#secondary  the defensive football players who line up behind the linemen
  supertype:  #formation_acting_as_a_unit__formation  an arrangement of people or things acting as a unit; "a defensive formation"; "a formation of planes"
  member:  #football_back_position
  member of:  #football_team__eleven  a team that plays football
     member of:  #football_league  a league of football teams

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