| No TPTP formula. May not be expressible in strict first order. | Cars.kif 91-91 | 子類 IntermittentCombustionEngine and 內燃機 |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 96-96 | 子類 FourStrokeEngine and IntermittentCombustionEngine |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 240-240 | 子類 TwoStrokeEngine and IntermittentCombustionEngine |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 4548-4548 | 子類 TwoCylinderEngine and IntermittentCombustionEngine |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 4556-4556 | 子類 FourCylinderEngine and IntermittentCombustionEngine |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 4564-4564 | 子類 SixCylinderEngine and IntermittentCombustionEngine |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 4572-4572 | 子類 EightCylinderEngine and IntermittentCombustionEngine |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 4865-4865 | 子類 MiniCooperEngine and IntermittentCombustionEngine |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 4977-4977 | 子類 ChevroletEngine and IntermittentCombustionEngine |
| No TPTP formula. May not be expressible in strict first order. | Cars.kif 5172-5172 | 子類 CosworthEngine and IntermittentCombustionEngine |
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