#serve__service  a stroke (in tennis or badminton or squash) that puts the ball in play; "his powerful serves won the game"
  supertype:  tennis_stroke__tennis_shot  the act of hitting a tennis ball with a tennis racket
  subtype:  ace  a serve that the receiver is unable to reach
  subtype:  fault.serve  (tennis or badminton or squash) a serve that is illegal (e.g., that lands outside the prescribed area); "he served too many double faults"
     subtype:  double_fault  (tennis) two successive faults in serving resulting in the loss of the point
     subtype:  footfault  a fault that occurs when the server in tennis fails to keep both feet behind the baseline
  subtype:  let__netball  a serve that strikes the net before falling into the receiver's court; the ball must be served again

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