Complex sentence: On September 1,1882 he beat George W. Lee in a three mile race on Canandarago Lake, finishing the three mile course in a record time of 19 minutes and 31 ½ seconds.
Split into simpler sentences: On September 1,1882 he beat George W. Lee in a three mile race on Canandarago Lake. Courtney finished the three mile coarse in record time of 19 minutes and 31 ½ seconds.