CREATE TABLE table_8768 ("Callsign" CLOB, "Frequency" CLOB, "Band" CLOB, "On-air ID" CLOB, "Purpose" CLOB)

What is the On-air ID of FM broadcaster 4nsa?
SELECT "On-air ID" FROM table_8768 WHERE "Band" = 'fm' AND "Callsign" = '4nsa'
SELECT "On-air ID" FROM "table_8768" WHERE "Band" = 'fm' AND "Callsign" = '4nsa'