What was the date of the friendly competition with a score of 4-0?
CREATE TABLE table_5408 (
    "Date" text,
    "Venue" text,
    "Score" text,
    "Result" text,
    "Competition" text
)
SELECT "Date" FROM table_5408 WHERE "Competition" = 'friendly' AND "Score" = '4-0'
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 was the date of the friendly competition with a score of 4-0? ### Input: CREATE TABLE table_5408 (
    "Date" text,
    "Venue" text,
    "Score" text,
    "Result" text,
    "Competition" text
) ### Response: SELECT "Date" FROM table_5408 WHERE "Competition" = 'friendly' AND "Score" = '4-0'