What is the earliest year in which Requiem for a Dream was in the running for Best Director?
CREATE TABLE table_name_21 (
    year INTEGER,
    title VARCHAR,
    category VARCHAR
)
SELECT MIN(year) FROM table_name_21 WHERE title = "requiem for a dream" AND category = "best director"
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 earliest year in which Requiem for a Dream was in the running for Best Director? ### Input: CREATE TABLE table_name_21 (
    year INTEGER,
    title VARCHAR,
    category VARCHAR
) ### Response: SELECT MIN(year) FROM table_name_21 WHERE title = "requiem for a dream" AND category = "best director"