Complex sentence: Kuru is an incurable degenerative neurological disorder endemic to tribal regions of Papua New Guinea, that is a type of transmissible spongiform encephalopathy, caused by a prion found in humans.
Split into simpler sentences: Kuru is an incurable degenerative neurological disorder endemic to tribal regions of Papua New Guinea. It is a type of transmissible spongiform encephalopathy, caused by a prion found in humans.