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

### Instruction:
What is the date that a game at the Alltel Stadium had a final score of 6-20?

### Inputs:
table_name: table, columns: ['Date', 'Visiting Team', 'Final Score', 'Host Team', 'Stadium']

### Response:
SELECT Date FROM table WHERE Stadium = alltel stadium AND Final Score = 6-20