Complex sentence: From December 17,1968 to January 4,1969 New York had a 10-game winning streak, then had another 11-game streak from January 25,1969 to February 15,1969.
Split into simpler sentences: From December 17,1968 to January 4,1969, New York had a 10-game winning streak. It had an 11-game streak from January 25,1969 to February 15,1969.