What is the earliest season where Aisha Jefcoate was the runner-up?
CREATE TABLE "australia" (
  "season" real,
  "year" real,
  "mole" text,
  "winner" text,
  "runner_up" text,
  "total_prize_money" text,
  "potential_prize_money" text,
  "destination" text
);
SELECT MIN("season") FROM "australia" WHERE "runner_up"='aisha jefcoate';