Complex sentence: The Chicago Blackhawks, who had won three Stanley Cups, finished first overall in the standings for the first time in their history a full 17 points ahead of the Montreal Canadiens and 19 ahead of the Toronto Maple Leafs.
Split into simpler sentences: The Chicago Blackhawks, who had won three Stanley Cups, finished first overall in the standings for the first time in their history. They were a full 17 points ahead of the Montreal Canadiens and 19 ahead of the Toronto Maple Leafs.