Complex sentence: Throughout its long history, McGill alumni were also instrumental in inventing or initially organizing football, basketball, and ice hockey and founding several other universities, including the Universities of British Columbia, Victoria, and Alberta, and the Johns Hopkins School of Medicine.
Split into simpler sentences: Throughout its long history, McGill alumni were instrumental in inventing or initially organizing football, basketball, and ice hockey. McGill or its alumni also founded several major universities, including the Universities of British Columbia, Victoria, and Alberta, and the Johns Hopkins School of Medicine.