Complex sentence: He initially trained as an economist, earning a master's degree in economics from Sao Paulo University in Brazil, but switched to photography in 1973, working initially on news assignments before veering more towards documentary-type work.
Split into simpler sentences: He initially trained as an economist, earning a master's degree in economics from Sao Paulo University in Brazil. He chose to abandon a career as an economist and switched to photography in 1973, working initially on news assignments before veering more towards documentary-type work.