CREATE TABLE table_204_521 (id DECIMAL, "rank" DECIMAL, "name" TEXT, "nationality" TEXT, "time  ( hand ) " TEXT, "notes" TEXT)

how many athletes finished the race in less than 5:00:00 ?
SELECT COUNT("name") FROM table_204_521 WHERE "time (hand)" < 5
SELECT COUNT("name") FROM "table_204_521" WHERE "time (hand)" < 5