Complex sentence: Imports began with built-up British-sourced saloons and coupes (in 1.3-and 1.8-litre forms) in 1971, but local assembly of Australian sourced (E-Series engines) models began in 1972 after the release of the Marinas there.
Split into simpler sentences: Imports began with built-up British-sourced saloons and coupes (in 1.3-and 1.8-litre forms) in 1971. Local assembly of Australian-sourced (E-Series engines) models began in 1972 after the release of the Marinas there.