CREATE TABLE table_36643 ("Year" FLOAT, "Date" TEXT, "Winner" TEXT, "Result" TEXT, "Loser" TEXT, "Location" TEXT)

Who lost at schaefer stadium when the Winner was new england patriots, and a Date of october 18?
SELECT "Loser" FROM table_36643 WHERE "Location" = 'schaefer stadium' AND "Winner" = 'new england patriots' AND "Date" = 'october 18'
SELECT "Loser" FROM "table_36643" WHERE "Date" = 'october 18' AND "Location" = 'schaefer stadium' AND "Winner" = 'new england patriots'