Premise: Ice hockey . The Kontinental Hockey League ( KHL ) is the highest league in Russia and much of Eastern Europe . In the early 1900s , the Canadian rules were adopted by the Ligue Internationale de Hockey sur Glace , the precursor of the IIHF and the sport was played for the first time in the Olympics in the Olympic Games of 1920 . In international competitions , the national teams of six countries ( the `` Big Six '' ) predominate : Canada , Czech Republic , Finland , Russia , Sweden and the United States . Teams outside the `` Big Six '' have won only five medals in either competition since 1953 : All 12 Women 's Olympic and 36 IIHF World Women 's Championships medals have been awarded to one of these six countries , and every gold medal in both competitions has been won by either the Canadian national team or the United States national team . The National Hockey League ( NHL ; Ligue nationale de hockey -- LNH ) is a professional ice hockey league currently comprising 30 teams -- 23 in the United States and 7 in Canada -- with a 31st team in Las Vegas scheduled to begin play in the 2017 -- 18 season .
Hypothesis: Ice hockey has national teams which compete internationally.
Label: ENTAILMENT