Which week was the game against the San Diego Chargers?
CREATE TABLE table_name_91 (
    week VARCHAR,
    opponent VARCHAR
)
SELECT week FROM table_name_91 WHERE opponent = "san diego chargers"
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: Which week was the game against the San Diego Chargers? ### Input: CREATE TABLE table_name_91 (
    week VARCHAR,
    opponent VARCHAR
) ### Response: SELECT week FROM table_name_91 WHERE opponent = "san diego chargers"