What was the highest attendance for the game where the record was 0-5 and the opponents scored more than 20 points?
CREATE TABLE "schedule" (
  "game" real,
  "date" text,
  "opponent" text,
  "result" text,
  "49ers_points" real,
  "opponents" real,
  "record" text,
  "streak" text,
  "attendance" real
);
SELECT MAX("attendance") FROM "schedule" WHERE "record"='0-5' AND "opponents">20;