Input (grade 13): Later rock paintings and engravings showing hippos being hunted have been found in the mountains of the central Sahara dated 4,000 â "5,000 years ago near Djanet in the Tassili n 'Ajjer Mountains.
Output (grade 6): Later rock paintings and engravings showing hippos being hunted. They have been found in the mountains of the central Sahara from 4,000 â "5,000 years ago near Djanet.