CREATE TABLE table_name_78 (opponent VARCHAR, week VARCHAR, date VARCHAR)

Which Opponent that has a Week larger than 3 on october 6, 1991?
SELECT opponent FROM table_name_78 WHERE week > 3 AND date = "october 6, 1991"
SELECT "opponent" FROM "table_name_78" WHERE "date" = "october 6, 1991" AND "week" > 3