Complex sentence: The first Dash 8-40CW was delivered the Union Pacific railroad in 1990, in total GE would build 756 Dash 8-40CW, the Dash 8-40CW was succeeded by the Dash 9-44CW in 1994.
Split into simpler sentences: The first Dash 8-40CW was delivered to the Union Pacific railroad in 1990. The Dash 8-40CW was succeeded by the Dash 9-44CW in 1994.