CREATE TABLE table_204_547 (id DECIMAL, "rank" DECIMAL, "lane" DECIMAL, "name" TEXT, "nationality" TEXT, "time" DECIMAL, "notes" TEXT)

who was the fastest , iceland or finland ?
SELECT "nationality" FROM table_204_547 WHERE "nationality" IN ('iceland', 'finland') ORDER BY "time" LIMIT 1
SELECT "nationality" FROM "table_204_547" WHERE "nationality" IN ('iceland', 'finland') ORDER BY "time" NULLS FIRST LIMIT 1