Which mean rank had a silver number smaller than 0?
CREATE TABLE table_name_60 (
    rank INTEGER,
    silver INTEGER
)
SELECT AVG(rank) FROM table_name_60 WHERE silver < 0
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 mean rank had a silver number smaller than 0? ### Input: CREATE TABLE table_name_60 (
    rank INTEGER,
    silver INTEGER
) ### Response: SELECT AVG(rank) FROM table_name_60 WHERE silver < 0