Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Which Change is the average one that has a Centre of buenos aires, and a Rank smaller than 46?

### Inputs:
table_name: table, columns: ['Rank', 'Centre', 'Country', 'Rating', 'Change']

### Response:
SELECT AVG Change FROM table WHERE Centre = buenos aires AND Rank < 46