Opponent of at san francisco 49ers had what lowest week?
CREATE TABLE table_name_43 (
    week INTEGER,
    opponent VARCHAR
)
SELECT MIN(week) FROM table_name_43 WHERE opponent = "at san francisco 49ers"
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: Opponent of at san francisco 49ers had what lowest week? ### Input: CREATE TABLE table_name_43 (
    week INTEGER,
    opponent VARCHAR
) ### Response: SELECT MIN(week) FROM table_name_43 WHERE opponent = "at san francisco 49ers"