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No TPTP formula. May not be expressible in strict first order. Languages.kif 13671-13671 中北部鸟类头语 是 鸟头语言 的 subclass
No TPTP formula. May not be expressible in strict first order. Languages.kif 13678-13678 中央鸟头语 是 中北部鸟类头语 的 subclass
No TPTP formula. May not be expressible in strict first order. Languages.kif 13707-13707 北鸟头语 是 中北部鸟类头语 的 subclass


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