Complex sentence: Zeta was the original name for General Motors'full-size rear-wheel drive automobile platform developed by GM's Australian subsidiary company Holden and was most recently referred to as the "Global RWD Architecture".
Split into simpler sentences: Zeta was the original name for General Motors'full-size rear-wheel drive automobile platform. The architecture was developed by GM's Australian subsidiary company Holden and was most recently referred to as the "Global RWD Architecture".