CREATE TABLE affected_region (region_id DECIMAL, storm_id DECIMAL, number_city_affected DECIMAL)
CREATE TABLE region (region_id DECIMAL, region_code TEXT, region_name TEXT)
CREATE TABLE storm (storm_id DECIMAL, name TEXT, dates_active TEXT, max_speed DECIMAL, damage_millions_usd DECIMAL, number_deaths DECIMAL)

What are the names of regions with two or more storms?
SELECT T1.region_name FROM region AS T1 JOIN affected_region AS T2 ON T1.region_id = T2.region_id GROUP BY T1.region_id HAVING COUNT(*) >= 2
SELECT "T1"."region_name" FROM "region" AS "T1" JOIN "affected_region" AS "T2" ON "T1"."region_id" = "T2"."region_id" GROUP BY "T1"."region_id" HAVING COUNT(*) >= 2