(subclass NiloSaharanLanguage SpokenHumanLanguage) | Languages.kif 12464-12464 | Nilo saharan language is a subclass of spoken human language |
(subclass EasternSudanicLanguage NiloSaharanLanguage) | Languages.kif 12471-12471 | Eastern sudanic language is a subclass of nilo saharan language |