Table schema:
CREATE TABLE table_name_6 (chef VARCHAR, restaurant_name VARCHAR, location VARCHAR, original_name VARCHAR)

Question: What chef that has a location in Toronto, ON, that has n/a as the original name, and a Restaurant Name of Bagel World?
SQL: SELECT chef FROM table_name_6 WHERE location = "toronto, on" AND original_name = "n/a" AND restaurant_name = "bagel world"