Original sentence: The Nimravidae, sometimes known as false sabre-tooths, are an extinct family of mammalian carnivores.Zoological Journal of the Linnean SocietyVolume 140 Issue 1 Page 43 - January 2004
Edited sentence: The Nimravidae, sometimes known as false sabre-tooths, are an extinct family of mammalian carnivores living from Eocene through Miocene (epoch (42—7.2 mya), existing for approximately.Zoological Journal of the Linnean Society, 2003, 138, 477–493