Complex sentence: Kriel was only 19 years old when she became Miss World in 1974, this marked a tumultuous period in South Africa's history, as the international boycott of South Africa continued to take pace.
Split into simpler sentences: Kriel was only 19 years old when she became Miss World in 1974. This marked a tumultuous period in South Africa's history, as the international boycott of South Africa continued to take pace.