Complex sentence: Lake Assal, a volcanic lake, in the middle of the country, in a closed depression located at the top of the Great Rift Valley is in the Danakil Desert bounded by hills on the western region.
Split into simpler sentences: Lake Assal, a volcanic lake in the middle of the country, in a closed depression located at the top of the Great Rift Valley. Situated in the Danakil Desert, it is bounded by hills on the western region.