Complex sentence: A Chevrolet Nova hatchback was introduced for the 1973 model year, and was offered through 1979, another hatchback Nova was reintroduced in the 80's based on the Toyota Sprinter.
Split into simpler sentences: A Chevrolet Nova hatchback was introduced for the 1973 model year, and was offered through 1979. Another hatchback Nova was reintroduced in the 80's based on the Toyota Sprinter.