CREATE TABLE table_204_155 (id DECIMAL, "rank" DECIMAL, "heat" DECIMAL, "athlete" TEXT, "nationality" TEXT, "time" DECIMAL, "notes" TEXT)

besides russia which other nation had an athlete ranked in the top 3 ?
SELECT "nationality" FROM table_204_155 WHERE "nationality" <> 'russia' AND "rank" <= 3
SELECT "nationality" FROM "table_204_155" WHERE "nationality" <> 'russia' AND "rank" <= 3