CREATE TABLE table_204_669 (id DECIMAL, "rank" DECIMAL, "athlete" TEXT, "nationality" TEXT, "time" TEXT)

who was the only contestant from switzerland to place in the top 50 ?
SELECT "athlete" FROM table_204_669 WHERE "nationality" = 'switzerland' AND "rank" <= 50
SELECT "athlete" FROM "table_204_669" WHERE "nationality" = 'switzerland' AND "rank" <= 50