Complex sentence: The formation of the Melbourne Storm saw Anderson become their first coach and he guided the team to Premiership success when they defeated the St George Illawarra Dragons in the 1999 NRL Grand Final.
Split into simpler sentences: The formation of the Melbourne Storm saw Anderson become their first coach. Then he guided the Storm to Premiership success when they defeated the St George Illawarra Dragons in the 1999 NRL Grand Final.