'(=< (Motor_Horsepower_Required ?X) 40)
(<= (Has-Constraint $X Motor_Horsepower_Required_C02) (Elevator $X)) (Inherited-Slot-Value Elevator Has-Constraint Motor_Horsepower_Required_C02) (Used-In-Constraint Motor_Horsepower_Required Motor_Horsepower_Required_C02)