| No TPTP formula. May not be expressible in strict first order. | Cars.kif 4344-4344 | 子類 Helmet and SafetyDevice |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 4345-4345 | 子類 Helmet and 對於 頭 的 covering |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 4349-4349 | 子類 MotorcycleHelmet and Helmet |
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