What is the amount of silver for rank 11 having less than 0 gold?
CREATE TABLE table_name_21 (
    silver INTEGER,
    rank VARCHAR,
    gold VARCHAR
)
SELECT MIN(silver) FROM table_name_21 WHERE rank = "11" AND gold < 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: What is the amount of silver for rank 11 having less than 0 gold? ### Input: CREATE TABLE table_name_21 (
    silver INTEGER,
    rank VARCHAR,
    gold VARCHAR
) ### Response: SELECT MIN(silver) FROM table_name_21 WHERE rank = "11" AND gold < 0