CREATE TABLE table_66160 ("Rank" FLOAT, "Heat" FLOAT, "Cyclist" TEXT, "Nation" TEXT, "Result" TEXT)

Which nation has a heat of 4, and is ranked 8?
SELECT "Nation" FROM table_66160 WHERE "Heat" = '4' AND "Rank" = '8'
SELECT "Nation" FROM "table_66160" WHERE "Heat" = '4' AND "Rank" = '8'