CREATE TABLE table_34047 ("Callsign" TEXT, "Area served" TEXT, "Frequency" TEXT, "Band" TEXT, "On-air ID" TEXT, "Purpose" TEXT)

What is the Callsign with an Area of tamworth and frequency of 0 88.9?
SELECT "Callsign" FROM table_34047 WHERE "Area served" = 'tamworth' AND "Frequency" = '0 88.9'
SELECT "Callsign" FROM "table_34047" WHERE "Area served" = 'tamworth' AND "Frequency" = '0 88.9'