What is the On-air ID of FM broadcaster 4nsa?
CREATE TABLE table_name_54 (
    on_air_id VARCHAR,
    band VARCHAR,
    callsign VARCHAR
)
SELECT on_air_id FROM table_name_54 WHERE band = "fm" AND callsign = "4nsa"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the On-air ID of FM broadcaster 4nsa? ### Input: CREATE TABLE table_name_54 (
    on_air_id VARCHAR,
    band VARCHAR,
    callsign VARCHAR
) ### Response: SELECT on_air_id FROM table_name_54 WHERE band = "fm" AND callsign = "4nsa"