What is the maximum number of clubs remaining when the league entering at this round was allsvenskan?
CREATE TABLE "teams" (
  "round" text,
  "clubs_remaining" real,
  "clubs_involved" real,
  "winners_from_previous_round" real,
  "new_entries_this_round" text,
  "leagues_entering_at_this_round" text
);
SELECT MIN("clubs_remaining") FROM "teams" WHERE "leagues_entering_at_this_round"='Allsvenskan';