Complex sentence: Following the 1988 triumph, the Soccer Federation decided that from the 1989 season onwards, the championship would be decided by a top four finals playoff, discarding the'first past the post' format after nearly a century of Association Football.
Split into simpler sentences: Following the 1988 triumph the Soccer Federation decided that from the 1989 season onwards, the championship would be decided by a top four finals playoff. The'first past the post' format was discarded after nearly a century of Association Football.