What was the score of the tied game or the away team of Crewe Alexandra?
CREATE TABLE table_63721 (
    "Tie no" text,
    "Home team" text,
    "Score" text,
    "Away team" text,
    "Date" text
)
SELECT "Tie no" FROM table_63721 WHERE "Away team" = 'crewe alexandra'
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 score of the tied game or the away team of Crewe Alexandra? ### Input: CREATE TABLE table_63721 (
    "Tie no" text,
    "Home team" text,
    "Score" text,
    "Away team" text,
    "Date" text
) ### Response: SELECT "Tie no" FROM table_63721 WHERE "Away team" = 'crewe alexandra'