 Complete the following phrase:  The National Hockey League All-Star Game is a mid-season exhibition game held annually between many of the top players of each season. Thirty-three All-Star Games have been held since the Oilers entered the league in 1979, with at least one player chosen to represent the Oilers in each year except 2004. The All-Star game has not been held in various years: 1979 and 1987 due to the 