(subclass VehicleSeat Artifact) | Cars.kif 5036-5036 | Vehicle seat is a subclass of artifact |
(subclass AutomobileSeat VehicleSeat) | Cars.kif 5050-5050 | Auto seat is a subclass of vehicle seat |
(subclass BoatSeat VehicleSeat) | Cars.kif 5067-5067 | Boat seat is a subclass of vehicle seat |