Conversation so far:
who won the 2015 great british baking show
The 2015 Great British Bake Off series was won by Nadiya Hussain.
what was the impact of the great british baking show
Bake Off is credited with spurring an interest in home baking, with supermarkets and department stores in the UK reporting sharp rises in sales of baking ingredients and accessories.

Question: what is the format of the show
Self-contained rewrite: what is the format of the great british baking show