(subclass BirdsHeadLanguage WestPapuanLanguage) | Languages.kif 13665-13665 | Birds head language is a subclass of west papuan language |
(subclass NorthCentralBirdsHeadLanguage BirdsHeadLanguage) | Languages.kif 13671-13671 | North central birds head language is a subclass of birds head language |
(subclass WestBirdsHeadLanguage BirdsHeadLanguage) | Languages.kif 13724-13724 | West birds head language is a subclass of birds head language |