Task: Explanation
Input (English): Megantereon was a genus of prehistoric machairodontine saber-toothed cat that lived in North America, Eurasia, and Africa. It may have been the ancestor of "Smilodon". Question: Before We Ruled The Earth featured what kind of cat? Answer: saber-toothed
Output (English): Megantereon was a genus of prehistoric machairodontine sabertoothed cat that lived in North America, Eurasia, and Africa.