_pad motion_detector trip_wire laser_chamber hypno_toad none - trigger
         shop_alarm - system
         bert fred - guard
         tom dick harry - burglar
        )
    (:init
        (active shop_alarm)
        (working bert shop_alarm)
        (casing_joint harry)
        (expertise harry motion_detector)
        (casing_joint dick)
        (expertise dick motion_detector)
        (protected gold)
        (protected_by gold motion_detector)
        )
    (:goal
      (and
        (rich harry)
      