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_15637071_1 (headquarters VARCHAR, icao VARCHAR)
### Question:
Where is the headquarters of the airline which has the ICAO code of AAU?
### Answer:
SELECT headquarters FROM table_15637071_1 WHERE icao = "AAU"