'(= (Opening_Width_Door ?X) (Opening_Width_Building ?X))
(<= (Has-Constraint $X Opening_Width_C) (Elevator $X)) (Inherited-Slot-Value Elevator Has-Constraint Opening_Width_C) (Used-In-Constraint Opening_Width_Building Opening_Width_C) (Used-In-Constraint Opening_Width_Door Opening_Width_C)