Complex sentence: Mazák (1981) said the Siberian, Caspian and Bengal tiger subspecies ranked as the biggest cats in modern times, without talking about lions that weighed or more, Geptner, V. G., Sludskii, A. A. (1972).
Split into simpler sentences: Mazák (1981) said the Siberian, Caspian and Bengal tiger subspecies ranked as the biggest cats in modern times. However, he did not mention that lions could weigh or more, Geptner, V. G., Sludskii, A. A. (1972).