What week has an attended smaller than 62,723 on October 22, 1961?
CREATE TABLE "regular_season_schedule" (
  "week" real,
  "date" text,
  "opponent" text,
  "result" text,
  "attendance" real
);
SELECT AVG("week") FROM "regular_season_schedule" WHERE "attendance"<'62,723' AND "date"='october 22, 1961';