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_30012404_4 (series__number INTEGER, us_air_date VARCHAR)
### Question:
What is the series # when the US air date is 20 July 2012?
### Answer:
SELECT MIN(series__number) FROM table_30012404_4 WHERE us_air_date = "20 July 2012"