Complex sentence: The Tatra 700 was a large luxury car released in 1996 by the Czech car maker Tatra, essentially a heavily restyled version of the Tatra 613 model it replaced.
Split into simpler sentences: The Tatra 700 was a large luxury car released in 1996 by the Czech car maker Tatra. It was essentially a heavily restyled version of the Tatra 613 model it replaced.