In 1971 at MCG, what was the score of the VFL Reserves?
CREATE TABLE "reserves_team" (
  "year" text,
  "competition" text,
  "opponent" text,
  "score" text,
  "venue" text
);
SELECT "score" FROM "reserves_team" WHERE "competition"='vfl reserves' AND "venue"='mcg' AND "year"='1971';