What is the greatest number of valves?
CREATE TABLE table_21021796_1 (
    valves INTEGER
)
SELECT MIN(valves) FROM table_21021796_1
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 greatest number of valves? ### Input: CREATE TABLE table_21021796_1 (
    valves INTEGER
) ### Response: SELECT MIN(valves) FROM table_21021796_1