Complex sentence: The M-412 was launched in the United Kingdom in 1969, when the first 20 dealerships were set up and some 300 cars were sold; sales increased annually and peaked in 1973, when 14,500 cars were exported through a 268-dealer network.
Split into simpler sentences: The M-412 was launched in the United Kingdom in 1969, when the first 20 dealerships were set up and some 300 cars were sold. Sales increased annually and peaked in 1973, when 14,500 cars were exported through a 268-dealer network.