Sentence:  The Tariana preference to speak in <WSD>matrilect</WSD> to mother's relatives, as reported by Aikhenvald, provides a strong comparative starting point for continued research on the norms of appropriate language use among Arawak Tariana and East Tukano speakers. 
Meaning of the word marked with <WSD> tags:  The idiolect of the mother or the mother's clan in a household where the mother and the father speak different idiolects.