System))
            (working ?Guard ?System)
        )
    )
  (:action trip_alarm
       :parameters ( ?System - system ?Valuable_item - valuable_item ?Trigger - trigger ?Burglar - burglar)
       :precondition (and 
            (active ?System)
            (protected ?Valuable_item)
            (protected_by ?Valuable_item ?Trigger)
            (casing_joint ?Burglar)
            (expertise ?Burglar ?Trigger)
       )
       :effect (and 
            (not (protected ?Valuable_item))
            (not (cas