(subclass Helmet SafetyDevice) | Cars.kif 4359-4359 | Helmet is a subclass of safety device |
(subclass Helmet (CoveringFn Head)) |
Cars.kif 4360-4360 | Helmet is a subclass of a covering for head |
(subclass MotorcycleHelmet Helmet) | Cars.kif 4364-4364 | Motorcycle helmet is a subclass of helmet |