What was the production code of the episode written by Brendan Cowell?
CREATE TABLE table_27637 (
    "Series #" real,
    "Title" text,
    "Director" text,
    "Writer" text,
    "Air Date" text,
    "Production Code" real
)
SELECT "Production Code" FROM table_27637 WHERE "Writer" = 'Brendan Cowell'
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 was the production code of the episode written by Brendan Cowell? ### Input: CREATE TABLE table_27637 (
    "Series #" real,
    "Title" text,
    "Director" text,
    "Writer" text,
    "Air Date" text,
    "Production Code" real
) ### Response: SELECT "Production Code" FROM table_27637 WHERE "Writer" = 'Brendan Cowell'