How many episodes in the series are also episode 18 in the season?
CREATE TABLE table_23492454_1 (
    no_in_series VARCHAR,
    no_in_season VARCHAR
)
SELECT COUNT(no_in_series) FROM table_23492454_1 WHERE no_in_season = 18
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 episodes in the series are also episode 18 in the season? ### Input: CREATE TABLE table_23492454_1 (
    no_in_series VARCHAR,
    no_in_season VARCHAR
) ### Response: SELECT COUNT(no_in_series) FROM table_23492454_1 WHERE no_in_season = 18