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