What date did the episode, with John O'Connell as the coach, premier? 
CREATE TABLE "season_5" (
  "season" real,
  "episode" real,
  "episode_summary" text,
  "premier_date" text,
  "external_link" text,
  "coach" text
);
SELECT "premier_date" FROM "season_5" WHERE "coach"='John O''Connell';