(Inherited-Facet-Value Slot-Value-Type Elevator Hoistway_Overhead Real-Number) (Inherited-Facet-Value Slot-Cardinality Elevator Hoistway_Overhead 1) (<= (Has-Parameter-Slot $X Hoistway_Overhead) (Elevator $X)) (Inherited-Slot-Value Elevator Has-Parameter-Slot Hoistway_Overhead)