Complex sentence: This was a time of enormous growth as South Africa and the rest of the world emerged from the Great Depression, all over Yeoville and Belleview in the years 1933--1934 blocks of flats were going up.
Split into simpler sentences: This was a time of enormous growth as South Africa and the rest of the world emerged from the Great Depression. All over Yeoville and Bellevue in the years 1933--1934, blocks of flats were going up.