CREATE TABLE gymnast (gymnast_id DECIMAL, floor_exercise_points DECIMAL, pommel_horse_points DECIMAL, rings_points DECIMAL, vault_points DECIMAL, parallel_bars_points DECIMAL, horizontal_bar_points DECIMAL, total_points DECIMAL)
CREATE TABLE people (people_id DECIMAL, name TEXT, age DECIMAL, height DECIMAL, hometown TEXT)

Give the hometowns from which two or more gymnasts are from.
SELECT T2.hometown FROM gymnast AS T1 JOIN people AS T2 ON T1.gymnast_id = T2.people_id GROUP BY T2.hometown HAVING COUNT(*) >= 2
SELECT "T2"."hometown" FROM "gymnast" AS "T1" JOIN "people" AS "T2" ON "T1"."gymnast_id" = "T2"."people_id" GROUP BY "T2"."hometown" HAVING COUNT(*) >= 2