(<= (Has-Subpart-Slot $X Elevator.Sling) (Elevator $X)) (Inherited-Slot-Value Elevator Has-Subpart-Slot Elevator.Sling) (Inherited-Facet-Value Slot-Value-Type Elevator Elevator.Sling Sling_Model) (Inherited-Facet-Value Slot-Cardinality Elevator Elevator.Sling 1) (=> (Elevator.Sling $X $Y) (Sling_Model $Y)) (=> (Elevator.Sling $X $Y) (Elevator $X))