Complex sentence: The folding of the Spitfires occurred in 1953 as hockey interests in Windsor chose to focus their attention on the OHA Senior A Hockey League, which resulted in the founding of the Windsor Bulldogs.
Split into simpler sentences: The folding of the Spitfires occurred in 1953 as hockey interests in Windsor chose to focus their attention on the OHA Senior A Hockey League. This resulted in the founding of the Windsor Bulldogs.