Table: the great british bake off
Question: What is the average gap between the premiere and finale dates across all series of The Great British Bake Off?
Step 1 (Operation, Indexing): premiere
Step 2 (Operation, Indexing): finale
Step 3 (Reasoning, Arithmetic): -, gap between the premiere and finale dates
Step 4 (Reasoning, Aggregating): AVG, average gap
Answer: 52 days