ceremony, the modified protocol created to allow a group of athletes and non-athletes famous for promoting Olympic values to carry the flag. Until the 1992 Summer Olympics (except the 1994 Winter Olympics), flag bearers of all countries then circle a rostrum, where one athlete of the host nation (since the 1920 Summer Olympics), and one judge of the host nation (since the 1972 Summer Olympics) speak the Olympic Oath, declaring they will compete and judge according to the rules of their respective sport. Since the 2012 Summer Olympics in London, continuing with the tradition started at the 2010 Summer Youth Olympics a coach from the host nation speaks out the Olympic Oath. For the 2018 Winter Olympics in Pyeongchang, the three oaths are merged into one as the Unified Oath where one athlete, judge, and coach recite one line of the oath respectively before the athlete finishes it. Olympic flame The climax of an opening ceremony is the arrival of the Olympic flame, as the conclusion of the torch relay: the torch is typically passed a group of final torchbearers—typically reflecting the host nation's most prominent Olympic athletes. The final torchbearer(s), in turn, lights a cauldron inside or near the stadium–signifying, in earnest, the beginning of the Games. There have been exceptions to the final torchbearers being prominent sports figures: in 2012, to reflect the Games' slogan "Inspire a Generation", the cauldron was lit by a group of seven young athletes, each nominated by a notable British athlete. Due the lack of tradition in Winter Sports, the final torchbearers at the 2022 Winter Olympics reflected the history of China at the sports with athletes from different decades (beginning with the 1950s), the cauldron was lit by two Chinese skiers who was to compete on that Games. Under IOC rules, the lighting of the Olympic cauldron must be witnessed by those attending the opening ceremony, implying that it must be lit at the location where the ceremony is taking place. Another IOC rule states that the cauldron should be witnessed outside by the entire residents of the entire host city. This rule was first made evident for the first time during the 2010 Winter Olympics opening ceremony in Vancouver, which was hosted by BC Place—then a domed, indoor stadium. While a multi-armed cauldron was jointly lit by Nancy Greene, Steve Nash, and Wayne Gretzky during the opening ceremony (due to a