CREATE TABLE table_203_298 (id DECIMAL, "rank" DECIMAL, "name" TEXT, "nation ( s ) " TEXT, "born" TEXT, "ascended" TEXT, "years reigned" TEXT)

which monarchs reined for more than 50 years ?
SELECT "name" FROM table_203_298 WHERE "years reigned" > 50
SELECT "name" FROM "table_203_298" WHERE "years reigned" > 50