 (protected diamond)
        (protected_by diamond pressure_pad)
        (protected gold)
        (protected_by gold motion_detector)
        (protected artifact)
        (protected_by artifact trip_wire)
        (working bert shop_alarm)
        (casing_joint tom)
        (expertise tom none)
        (casing_joint harry)
        (expertise harry none)
        (casing_joint dick)
        (expertise dick none)
        )
    (:goal
      (and
        (gone gold)
        (rich tom)
        (caught dick)
      