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_54 (on_air_id VARCHAR, band VARCHAR, callsign VARCHAR)
### Question:
What is the On-air ID of FM broadcaster 4nsa?
### Answer:
SELECT on_air_id FROM table_name_54 WHERE band = "fm" AND callsign = "4nsa"