How many season premiers have a rank of #21?
CREATE TABLE table_10819266_8 (season VARCHAR, rank VARCHAR)
SELECT season AS premiere FROM table_10819266_8 WHERE rank = "#21"
### Context: CREATE TABLE table_10819266_8 (season VARCHAR, rank VARCHAR) ### Question: How many season premiers have a rank of #21? ### Answer: SELECT season AS premiere FROM table_10819266_8 WHERE rank = "#21"