SELECT channels___analog___digital__ FROM table_name_91 WHERE first_air_date = "31 december 1990" AND region_served = "southern downs"
Saluran apa yang pertama kali ditayangkan pada tanggal 31 Desember 1990 di wilayah Downs Selatan?
CREATE TABLE table_name_91 (channels___analog___digital__ VARCHAR, first_air_date VARCHAR, region_served VARCHAR)