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_228973_9 (no_in_series VARCHAR, original_air_date VARCHAR)
### Question:
If the original air date is April 1, 2003, what number in the series is this episode?
### Answer:
SELECT no_in_series FROM table_228973_9 WHERE original_air_date = "April 1, 2003"