which competition did it organize?
ice hockey
National Hockey League
The National Hockey League (NHL; ) is a professional ice hockey league in North America, currently comprising 31 teams: 24 in the United States and 7 in Canada. 
which game is played in stanley cup? Hockey who is its organizer? UNANSWERABLE
wiki:25609220
National Hockey League [SEP] Introduction
The National Hockey League (NHL; ) is a professional ice hockey league in North America, currently comprising 31 teams: 24 in the United States and 7 in Canada. The NHL is considered to be the premier professional ice hockey league in the world, and one of the major professional sports leagues in the United States and Canada. The Stanley Cup, the oldest professional sports trophy in North America, is awarded annually to the league playoff champion at the end of each season. The National Hockey League was organized on November 26, 1917, at the Windsor Hotel in Montreal after the suspension of operations of its predecessor organization, the National Hockey Association (NHA), which had been founded in 1909 in Renfrew, Ontario.