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_40 (aircraft_flown VARCHAR, axis_unit VARCHAR, enemy_aircraft VARCHAR)
### Question:
What was the aircraft flown when the axis unit was luftwaffe (**) and the enemy aircraft was ju.88?
### Answer:
SELECT aircraft_flown FROM table_name_40 WHERE axis_unit = "luftwaffe (**)" AND enemy_aircraft = "ju.88"