#football_player__footballer  an athlete who plays American football
  supertype:  athlete  player
  subtype:  back.football_player  (football) a person who plays in the backfield
     subtype:  flankerback__flanker  a back stationed wide of the scrimmage line; used as a pass receiver
     subtype:  signal_caller__quarterback__field_general__fieldgeneral  (football) the person who plays quarterback
     subtype:  running_back__runningback  (football) a back on the offensive team (a fullback or halfback) who tries to advance the ball by carrying it on plays from the line of scrimmage
        subtype:  fullback.running_back  (football) the running back who plays the fullback position on the offensive team
        subtype:  halfback.running_back  (football) the running back who plays the offensive halfback position
     subtype:  tailback.back  (football) the person who plays tailback
     subtype:  wingback.back  (football) the person who plays wingback
  subtype:  ball_carrier  (football) the football player who is carrying (and trying to advance) the ball on an offensive play
     subtype:  forward_passer__forwardpasser__passer  (football) a ball carrier who tries to gain ground by throwing a forward pass
     subtype:  rusher.ball_carrier  (football) a ball carrier who tries to gain ground by running with the ball
  subtype:  blocker  a football player whose responsibility is to block players attempting to stop an offensive play
  subtype:  football_hero  a football player who has achieved a reputation for success
  subtype:  kicker  a player who kicks the football
     subtype:  dropkicker  a football kicker who drops the ball and kicks it just as it reaches the ground
     subtype:  place-kicker__placekicker  (football) a kicker who makes a place kick for a goal
     subtype:  punter  (football) a person who kicks the football by dropping it from the hands and contacting it with the foot before it hits the ground
  subtype:  line_backer__linebacker  a defensive football player who takes a position close behind the linemen
  subtype:  lineman.football_player  one of the players on the line of scrimmage
     subtype:  football_snapper__center__snapper  (football) the person who plays center on the line of scrimmage and snaps the ball to the quarterback; "the center fumbled the handoff"
     subtype:  football_end-line-man__end  (football) the person who plays at one end of the line of scrimmage; "the end managed to hold onto the pass"
        subtype:  split_end__splitend  (football) an offensive end who lines up at a distance from the other linemen
        subtype:  tight_end__tightend  (football) an offensive end who lines up close to the tackle
     subtype:  football_guard__guard  the person who plays that position on a football team; "the left guard was injured on the play"
     subtype:  tackle.lineman  the person who plays that position on a football team; "the right tackle is a straight A student"
  subtype:  pass_receiver__receiver__pass_catcher  a football player who catches (or is supposed to catch) a forward pass
  subtype:  tackler  a football player who tackles the ball carrier

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