Complex sentence: The Transfăgărășan was constructed between 1970 and 1974, during the rule of Nicolae Ceaușescu, as a response to the 1968 invasion of Czechoslovakia by the Soviet Union.
Split into simpler sentences: The Transfăgărășan was constructed between 1970 and 1974, during the rule of Nicolae Ceaușescu. It was built as a response to the 1968 invasion of Czechoslovakia by the Soviet Union.