What is the date that a game at the Alltel Stadium had a final score of 6-20?
CREATE TABLE table_70685 (
    "Date" text,
    "Visiting Team" text,
    "Final Score" text,
    "Host Team" text,
    "Stadium" text
)
SELECT "Date" FROM table_70685 WHERE "Stadium" = 'alltel stadium' AND "Final Score" = '6-20'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the date that a game at the Alltel Stadium had a final score of 6-20? ### Input: CREATE TABLE table_70685 (
    "Date" text,
    "Visiting Team" text,
    "Final Score" text,
    "Host Team" text,
    "Stadium" text
) ### Response: SELECT "Date" FROM table_70685 WHERE "Stadium" = 'alltel stadium' AND "Final Score" = '6-20'