What chef that has a location in Toronto, ON, that has n/a as the original name, and a Restaurant Name of Bagel World?
CREATE TABLE "season_4" (
  "restaurant_name" text,
  "original_name" text,
  "location" text,
  "chef" text,
  "designer" text,
  "still_open" text
);
SELECT "chef" FROM "season_4" WHERE "location"='toronto, on' AND "original_name"='n/a' AND "restaurant_name"='bagel world';