Middle Sepik languages
Unlike most other Sepik languages , Middle Sepik languages do not overtly mark gender on nouns , although the third-person singular pronoun does distinguish between masculine and feminine genders ( e . g . , Proto-Ndu *nd- ‘3sg . m’ and *l- ‘3sg . f’ ) . 
<triplet> Ndu <subj> Middle Sepik languages <obj> subclass of