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

### Instruction:
If the playoff berth is 17, what is the AFC championship number?

### Inputs:
table_name: table, columns: ['Team', 'Division Titles', 'Playoff Berths', 'AFL Titles', 'AFC Championships', 'Super Bowl Championships']

### Response:
SELECT AFC Championships FROM table WHERE Playoff Berths = 17