Complex sentence: In 1988, they were promoted to New South Wales Division 2 where they finished 3rd and the following year (1989), they were Champions of Division 2-losing only 3 games all season and received promotion to New South Wales Division 1.
Split into simpler sentences: In 1988, they were promoted to New South Wales Division 2 where they finished 3rd and the following year (1989). The club was Champion of Division 2, losing only 3 games all season and received promotion to New South Wales Division 1.