Task: Text Simplification
Input (English): The marsupial lion ( " Thylacoleo carnifex " ) is an extinct species of carnivorous marsupial mammal that lived in Australia from the early to the late Pleistocene ( 1,600,000 – 46,000 years ago ) .
Output (English): The Marsupial lion , Thylacoleo , is an extinct carnivorous marsupial which lived in Australia from 1,600,000 to 46,000 years ago .