What region has a transmitter located at Mount Sugarloaf?
CREATE TABLE "main_transmitters" (
  "region_served" text,
  "city" text,
  "channels_analog_digital" text,
  "first_air_date" text,
  "erp_analog_digital" text,
  "haat_analog_digital_1" text,
  "transmitter_location" text
);
SELECT "region_served" FROM "main_transmitters" WHERE "transmitter_location"='mount sugarloaf';