How many years had the best actress in a Revival category?
CREATE TABLE table_name_9 (
    year VARCHAR,
    category VARCHAR
)
SELECT COUNT(year) FROM table_name_9 WHERE category = "best actress in a revival"
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: How many years had the best actress in a Revival category? ### Input: CREATE TABLE table_name_9 (
    year VARCHAR,
    category VARCHAR
) ### Response: SELECT COUNT(year) FROM table_name_9 WHERE category = "best actress in a revival"