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