| (subclass Language LinguisticExpression) | Merge.kif 1440-1440 | Language is a subclass of linguistic expression |
| (subclass WrittenLanguage Language) | Merge.kif 1448-1448 | WrittenLanguage is a subclass of language |
| (subclass AnimalLanguage Language) | Merge.kif 1450-1450 | Animal language is a subclass of language |
| (subclass ArtificialLanguage Language) | Merge.kif 1464-1464 | Artificial language is a subclass of language |
| (subclass HumanLanguage Language) | Merge.kif 1481-1481 | Human language is a subclass of language |
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