When is the winner olympiacos, the venue is georgios karaiskakis stadium and the runner-up is iraklis?
CREATE TABLE "greek_cup_finals" (
  "year" text,
  "winner" text,
  "runner_up" text,
  "score" text,
  "venue" text
);
SELECT "year" FROM "greek_cup_finals" WHERE "winner"='olympiacos' AND "venue"='georgios karaiskakis stadium' AND "runner_up"='iraklis';