Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_22948559_1 (production_code VARCHAR, no_in_season VARCHAR)
### Question:
Name the production code for number in season being 21
### Answer:
SELECT production_code FROM table_22948559_1 WHERE no_in_season = "21"