CREATE TABLE table_66343 ("Rank" FLOAT, "Heat" FLOAT, "Lane" FLOAT, "Name" CLOB, "Nationality" CLOB, "Time" CLOB)

Serbia has a heat less than 2 and what sum of rank?
SELECT COUNT("Rank") FROM table_66343 WHERE "Nationality" = 'serbia' AND "Heat" < '2'
SELECT COUNT("Rank") FROM "table_66343" WHERE "Heat" < '2' AND "Nationality" = 'serbia'