qnli question: What is Detroit's sports related nickname? sentence: In the years following the mid-1930s, Detroit was referred to as the "City of Champions" after the Tigers, Lions, and Red Wings captured all three major professional sports championships in a seven-month period of time (the Tigers won the World Series in October 1935; the Lions won the NFL championship in December 1935; the Red Wings won the Stanley Cup in April 1936).