What was the tie number for the round against visiting opponent Newcastle United?
CREATE TABLE table_name_53 (
    tie_no VARCHAR,
    away_team VARCHAR
)
SELECT tie_no FROM table_name_53 WHERE away_team = "newcastle united"
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 tie number for the round against visiting opponent Newcastle United? ### Input: CREATE TABLE table_name_53 (
    tie_no VARCHAR,
    away_team VARCHAR
) ### Response: SELECT tie_no FROM table_name_53 WHERE away_team = "newcastle united"