Complex sentence: Instead of going back to Sacramento down 3 games to 1, the shot tied the series at 2 and allowed the Lakers to defeat the Kings in 7 games on their way to a 3rd straight championship.
Split into simpler sentences: Instead of going back to Sacramento down 3 games to 1, the shot tied the series at 2. The Lakers went on to defeat the Kings in 7 games and eventually won their 3rd straight championship.