| Helmet | |
| appearance as argument number 1 |
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| (documentation Helmet EnglishLanguage "Any WearableItem designed to protect the Head of the individual who wears it.") | Cars.kif 4335-4336 | |
| (subclass Helmet (CoveringFn Head)) |
Cars.kif 4334-4334 | |
| (subclass Helmet SafetyDevice) | Cars.kif 4333-4333 |
| appearance as argument number 2 |
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| (subclass MotorcycleHelmet Helmet) | Cars.kif 4338-4338 |
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