What' the series number of the episode with season number 13?
CREATE TABLE table_2226817_6 (
    no_in_series INTEGER,
    no_in_season VARCHAR
)
SELECT MIN(no_in_series) FROM table_2226817_6 WHERE no_in_season = 13
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: What' the series number of the episode with season number 13? ### Input: CREATE TABLE table_2226817_6 (
    no_in_series INTEGER,
    no_in_season VARCHAR
) ### Response: SELECT MIN(no_in_series) FROM table_2226817_6 WHERE no_in_season = 13