When were episodes first broadcast with jessica ennis as andrew and jacks guest?
CREATE TABLE "table1_29141354_5" (
  "episode" text,
  "first_broadcast" text,
  "andrew_and_jacks_guest" text,
  "jamies_guests_peter_crouch_replaced_jamie_redknapp_as_team_captain_for_one_week_in_series_5_episode_2" text,
  "scores" text
);
SELECT "first_broadcast" FROM "table1_29141354_5" WHERE "andrew_and_jacks_guest"='Jessica Ennis';