CREATE TABLE table_16660 ("Round" FLOAT, "Grand Prix" TEXT, "Date" TEXT, "Location" TEXT, "Pole Position" TEXT, "Fastest Lap" TEXT, "Winning Driver" TEXT, "Winning Constructor" TEXT, "Report" TEXT)

what are all the location where date is 5 april
SELECT "Location" FROM table_16660 WHERE "Date" = '5 April'
SELECT "Location" FROM "table_16660" WHERE "Date" = '5 April'