Question: Among the countries whose government type is republic, how many of them shares a border that's longer than 200?
SQL: SELECT COUNT(DISTINCT T1.Name) FROM country AS T1 INNER JOIN politics AS T2 ON T1.Code = T2.Country INNER JOIN borders AS T3 ON T3.Country1 = T2.Country WHERE T2.Government = 'republic' AND T3.Length > 200