Who were the guests on the episode that first aired August 16?
CREATE TABLE "table1_25691838_8" (
  "episode_num" real,
  "the_w_rd" text,
  "guest" text,
  "introductory_phrase" text,
  "original_airdate" text,
  "production_code" real
);
SELECT "guest" FROM "table1_25691838_8" WHERE "original_airdate"='August 16';