What was the date for the away team, team Southport?
CREATE TABLE table_51040 (
    "Tie no" text,
    "Home team" text,
    "Score" text,
    "Away team" text,
    "Date" text
)
SELECT "Date" FROM table_51040 WHERE "Away team" = 'southport'
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 for the away team, team Southport? ### Input: CREATE TABLE table_51040 (
    "Tie no" text,
    "Home team" text,
    "Score" text,
    "Away team" text,
    "Date" text
) ### Response: SELECT "Date" FROM table_51040 WHERE "Away team" = 'southport'