Complex sentence: Each film was approximately 10 minutes in length and covered a range of subject matter, ranging from sport, to historical compilations about Canada, and Canadians, to portraits and aspects of Canadian life and activities.
Split into simpler sentences: Each film was approximately 10 minutes in length and covered a range of subject matter. Topics ranged from sport, to historical compilations about Canada, and Canadians, to portraits and aspects of Canadian life and activities.