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_23122988_1 (airdate VARCHAR, headliner VARCHAR)
### Question:
What date did the show air when Sean Lock was the headliner?
### Answer:
SELECT airdate FROM table_23122988_1 WHERE headliner = "Sean Lock"