original_query: What was the format of the VFL competition in 1921?
query: What was the format of the VFL competition in 1921?
answer: The VFL competition consisted of nine teams of 18 on-the-field players each.  Each team played every other team twice in a home-and-away season of 18 rounds (16 matches and 2 byes). The Premiers were determined by the "Argus system".