Complex sentence: Hyundai underwent a major restructuring and break-up following the 1997 East Asian financial crisis and Chung's death, following which the rump Hyundai Group's business was reduced to container shipping services, the manufacturing of elevators and tourism.
Split into simpler sentences: Hyundai underwent a major restructuring and break-up following the 1997 East Asian financial crisis and Chung's death. Following the break-up, the rump Hyundai Group's business was reduced to manufacturing of elevators, container shipping services, and tourism.