What is the largest draw with 37 games from England?
CREATE TABLE "managers_since_1970" (
  "nationality" text,
  "cambridge_united_career" text,
  "games" real,
  "drawn" real,
  "lost" real,
  "pct_won" text,
  "pts_game" text
);
SELECT MAX("drawn") FROM "managers_since_1970" WHERE "nationality"='england' AND "games"=37;