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_10935205_1 (production_code INTEGER, us_airdate VARCHAR)
### Question:
The U.S. airdate of 4 april 2008 had a production code of what?
### Answer:
SELECT MAX(production_code) FROM table_10935205_1 WHERE us_airdate = "4 April 2008"