what is the score on 14 december 1974 and the away team is crystal palace?
CREATE TABLE "second_round_proper" (
  "tie_no" text,
  "home_team" text,
  "score" text,
  "away_team" text,
  "date" text
);
SELECT "score" FROM "second_round_proper" WHERE "date"='14 december 1974' AND "away_team"='crystal palace';