(subclass NorthCentralBirdsHeadLanguage BirdsHeadLanguage) | Languages.kif 13671-13671 | North central birds head language is a subclass of birds head language |
(subclass CentralBirdsHeadLanguage NorthCentralBirdsHeadLanguage) | Languages.kif 13678-13678 | Central birds head language is a subclass of north central birds head language |
(subclass NorthBirdsHeadLanguage NorthCentralBirdsHeadLanguage) | Languages.kif 13707-13707 | North birds head language is a subclass of north central birds head language |