What are the hometowns that are shared by at least two gymnasts?
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
[{'Hometown': 'Santo Domingo'}]