Where do the Jê people live?

Poty, tell us about their practice of ‘burying’ the dead in caves. What are the speculations about the origins of this ritual?

Thanks for the picture, it helped direct me to the right answer. The explanation is very dry though, just a cataloguing of the different factions. The paragraphs are lifted straight out of Wikipedia—lazy! Give us something interesting about their culture. Make us curious, make us care!