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Term 1: Term 2:

(subclass Letter FactualText) Mid-level-ontology.kif 14804-14804 子類 信件 and 事實文本
(subclass Letter Correspondence) Media.kif 953-953 子類 信件 and Correspondence
(subclass Letter TextDocument) Media.kif 954-954 子類 信件 and TextDocument


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