What is the attendance when the opponent is the San Francisco 49ers?
CREATE TABLE table_43460 (
    "Week" real,
    "Date" text,
    "Opponent" text,
    "Result" text,
    "Attendance" text
)
SELECT "Attendance" FROM table_43460 WHERE "Opponent" = '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: What is the attendance when the opponent is the San Francisco 49ers? ### Input: CREATE TABLE table_43460 (
    "Week" real,
    "Date" text,
    "Opponent" text,
    "Result" text,
    "Attendance" text
) ### Response: SELECT "Attendance" FROM table_43460 WHERE "Opponent" = 'san francisco 49ers'