What is the date of the game against the Royals that had an attendance of 12,699?
CREATE TABLE "game_log" (
  "date" text,
  "opponent" text,
  "score" text,
  "loss" text,
  "attendance" text,
  "record" text
);
SELECT "date" FROM "game_log" WHERE "opponent"='royals' AND "attendance"='12,699';