What's the series number of the episode written by Dan Vebber?
CREATE TABLE table_23242933_2 (
    no_in_series INTEGER,
    written_by VARCHAR
)
SELECT MAX(no_in_series) FROM table_23242933_2 WHERE written_by = "Dan Vebber"
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's the series number of the episode written by Dan Vebber? ### Input: CREATE TABLE table_23242933_2 (
    no_in_series INTEGER,
    written_by VARCHAR
) ### Response: SELECT MAX(no_in_series) FROM table_23242933_2 WHERE written_by = "Dan Vebber"