When was the episode with Amy Williams as Andrew and Jack's guest broadcast?
CREATE TABLE "table1_29141354_7" (
  "episode" text,
  "first_broadcast" text,
  "andrew_and_jacks_guest" text,
  "jamies_guests" text,
  "scores" text
);
SELECT "first_broadcast" FROM "table1_29141354_7" WHERE "andrew_and_jacks_guest"='Amy Williams';