What was # of the first game played on August 20?
CREATE TABLE "regular_season" (
  "game" real,
  "date" text,
  "opponent" text,
  "score" text,
  "high_points" text,
  "high_rebounds" text,
  "high_assists" text,
  "location" text,
  "record" text
);
SELECT MIN("game") FROM "regular_season" WHERE "date"='August 20';