Question: Which mountain is the highest in an independent country?
SQL: SELECT T4.Name FROM country AS T1 INNER JOIN politics AS T2 ON T1.Code = T2.Country INNER JOIN geo_mountain AS T3 ON T3.Country = T2.Country INNER JOIN mountain AS T4 ON T4.Name = T3.Mountain WHERE T2.Independence IS NOT NULL ORDER BY T4.Height DESC LIMIT 1