 Complete the following phrase:  The AFC Asian Cup is an association football competition established in 1956. It is contested by the mens national teams of the members of the Asian Football Confederation AFC, the sports Asian governing body, and takes place generally every four years. The winners of the first tournament were South Korea, who won in a round-robin style tournament, The first final was in 1972, where Iran defeated South Korea 21 after extra time in Bangkok. The 