Question: What sub-Saharan African mammal is the third-largest type of land mammal and a large concentration of them can be found at the Kazinga Channel?
Sentence (from "Kolponomos"): Kolponomos is an extinct genus of carnivoran mammal that existed in the Late Arikareean North American Land Mammal Age, early Miocene epoch, about 20 million years ago.
Relevant evidence: No