CREATE TABLE table_4799 ("Round" FLOAT, "Name" CLOB, "Circuit" CLOB, "Date" CLOB, "Winning driver" CLOB, "Winning car" CLOB)

What circuit had an ensign n180 as the winning car in round 5?
SELECT "Circuit" FROM table_4799 WHERE "Winning car" = 'ensign n180' AND "Round" = '5'
SELECT "Circuit" FROM "table_4799" WHERE "Round" = '5' AND "Winning car" = 'ensign n180'