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

### Instruction:
What is the average position for tb2l teams promoted champion?

### Inputs:
table_name: table, columns: ['Season', 'Tier', 'League', 'Pos.', 'Postseason', 'Turkish Cup']

### Response:
SELECT AVG Pos. FROM table WHERE League = tb2l AND Postseason = promoted champion