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

### Instruction:
What position is associated with a Time of 20:39.171?

### Inputs:
table_name: table, columns: ['Pos.', 'Driver', 'Time', 'Best time', 'Points']

### Response:
SELECT AVG Pos. FROM table WHERE Time = 20:39.171