What's the Dolphin Points when the attendance was less than 69,313 and had an opponent of the Buffalo Bills?
CREATE TABLE "schedule" (
  "game" real,
  "date" text,
  "opponent" text,
  "result" text,
  "dolphins_points" real,
  "opponents" real,
  "record" text,
  "attendance" real
);
SELECT AVG("dolphins_points") FROM "schedule" WHERE "opponent"='buffalo bills' AND "attendance"<'69,313';