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Term 1: Term 2:

No TPTP formula. May not be expressible in strict first order. Mid-level-ontology.kif 17119-17119 Sign is a subclass of content bearing object
No TPTP formula. May not be expressible in strict first order. Mid-level-ontology.kif 17120-17120 Sign is a subclass of display artifact
No TPTP formula. May not be expressible in strict first order. Media.kif 851-851 Sign is a subclass of data display device


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