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No TPTP formula. May not be expressible in strict first order. Transportation.kif 2432-2432 客货船 是 客船 的 subclass
No TPTP formula. May not be expressible in strict first order. Transportation.kif 2433-2433 客货船 是 货船 的 subclass
No TPTP formula. May not be expressible in strict first order. Transportation.kif 2352-2352 客运登陆艇 是 客货船 的 subclass


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