CREATE TABLE table_204_71 (id DECIMAL, "rank" DECIMAL, "heat" DECIMAL, "name" TEXT, "nationality" TEXT, "time" TEXT, "notes" TEXT)

how many women clocked less than 13 secs the women 's heat of 100m hurdles ?
SELECT COUNT("name") FROM table_204_71 WHERE "time" < 13
SELECT COUNT("name") FROM "table_204_71" WHERE "time" < 13