SELECT T2.Hometown FROM gymnast AS T1 JOIN people AS T2 ON T1.Gymnast_ID  =  T2.People_ID GROUP BY T2.Hometown ORDER BY COUNT(*) DESC LIMIT 1
What is the most common hometown of gymnasts?
[Schema (values) (types)]: | gymnast |  gymnast : gymnast_id (text) , floor_exercise_points (number) , pommel_horse_points (number) , rings_points (number) , vault_points (number) , parallel_bars_points (number) , horizontal_bar_points (number) , total_points (number) | people : people_id (text) , name (number) , age (number) , height (number) , hometown (number);