CREATE TABLE table_43543 ("Round" FLOAT, "Race Name" CLOB, "Circuit" CLOB, "City/Location" CLOB, "Date" CLOB)

What day was the location Cleveland, Ohio in Round 6?
SELECT "Date" FROM table_43543 WHERE "City/Location" = 'cleveland, ohio' AND "Round" = '6'
SELECT "Date" FROM "table_43543" WHERE "City/Location" = 'cleveland, ohio' AND "Round" = '6'