Complex sentence: The 1989 Grey Cup is considered one of the finest games in Canadian football history: the Saskatchewan Roughriders defeated the Hamilton Tiger-Cats 43--40, the highest scoring Grey Cup game of all-time.
Split into simpler sentences: The 1989 Grey Cup is considered one of the finest games in Canadian football history. The Saskatchewan Roughriders defeated the Hamilton Tiger-Cats 43--40, the highest scoring Grey Cup game of all-time.