When 129 is the number in the series who is the writer?
CREATE TABLE table_228973_7 (
    written_by VARCHAR,
    no_in_series VARCHAR
)
SELECT written_by FROM table_228973_7 WHERE no_in_series = 129
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: When 129 is the number in the series who is the writer? ### Input: CREATE TABLE table_228973_7 (
    written_by VARCHAR,
    no_in_series VARCHAR
) ### Response: SELECT written_by FROM table_228973_7 WHERE no_in_series = 129