'(=< (Crosshead_Deflection_Index ?X) (Sling_Deflection_Index_Maximum (Elevator.Sling ?X)))
(<= (Has-Constraint $X C-27) (Elevator $X)) (Inherited-Slot-Value Elevator Has-Constraint C-27) (Used-In-Constraint Crosshead_Deflection_Index C-27) (Used-In-Constraint Sling_Deflection_Index_Maximum C-27)