Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_21 ( year INTEGER, title VARCHAR, category VARCHAR )

### Question ###
What is the earliest year in which Requiem for a Dream was in the running for Best Director?

### Accurate SQL ###

SELECT MIN(year) FROM table_name_21 WHERE title = "requiem for a dream" AND category = "best director"