On which week was the opponent the oakland raiders?
CREATE TABLE table_name_91 (week INTEGER, opponent VARCHAR)
SELECT SUM(week) FROM table_name_91 WHERE opponent = "oakland raiders"
### Context: CREATE TABLE table_name_91 (week INTEGER, opponent VARCHAR) ### Question: On which week was the opponent the oakland raiders? ### Answer: SELECT SUM(week) FROM table_name_91 WHERE opponent = "oakland raiders"