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_name_39 (air_date VARCHAR, winner VARCHAR, challenge VARCHAR)
### Question:
What air date has a red winner and an emergency braking challenge?
### Answer:
SELECT air_date FROM table_name_39 WHERE winner = "red" AND challenge = "emergency braking"