What arena was season 6 played at?
CREATE TABLE "teams" (
  "previous_season" text,
  "team" text,
  "town" text,
  "arena_capacity" text,
  "website" text,
  "head_coach" text,
  "foreign_players_max_2" text
);
SELECT "arena_capacity" FROM "teams" WHERE "previous_season"='6';