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"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: On which week was the opponent the oakland raiders? ### Input: CREATE TABLE table_name_91 (
    week INTEGER,
    opponent VARCHAR
) ### Response: SELECT SUM(week) FROM table_name_91 WHERE opponent = "oakland raiders"