| No TPTP formula. May not be expressible in strict first order. | Cars.kif 4367-4367 | Helmet 是 SafetyDevice 的 subclass |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 4368-4368 | Helmet 是 对于 头 的 covering 的 subclass |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 4372-4372 | MotorcycleHelmet 是 Helmet 的 subclass |
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