In games where the opponent was the San Francisco 49ers what was the minimum amount of points scored?
CREATE TABLE "schedule" (
  "game" real,
  "date" text,
  "opponent" text,
  "result" text,
  "falcons_points" real,
  "opponents" real,
  "record" text,
  "attendance" real
);
SELECT MIN("falcons_points") FROM "schedule" WHERE "opponent"='San Francisco 49ers';