SELECT T1.Name FROM country AS T1 JOIN roller_coaster AS T2 ON T1.Country_ID  =  T2.Country_ID GROUP BY T1.Name HAVING COUNT(*)  >  1
Show the names of countries that have more than one roller coaster.
[Schema (values) (types)]: | roller_coaster |  roller_coaster : roller_coaster_id (text) , name (number) , park (text) , country_id (text) , length (number) , height (number) , speed (number) , opened (text) , status (text) | country : country_id (text) , name (number) , population (text) , area (text) , languages (number);