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No TPTP formula. May not be expressible in strict first order. Mid-level-ontology.kif 17711-17711 子類 宇宙飛船 and 車輛
No TPTP formula. May not be expressible in strict first order. Mid-level-ontology.kif 17719-17719 子類 火箭 and 宇宙飛船


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