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Term 1: Term 2:

(subclass AlphaNumericIDString FormalIdentifier) Media.kif 2950-2950 AlphaNumericIDString 是 FormalIdentifier 的 subclass
(subclass AlphaNumericIDString AlphaNumericString) Media.kif 2951-2951 AlphaNumericIDString 是 AlphaNumericString 的 subclass


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