List the number of active years for attaquant.
CREATE TABLE table_24565004_15 (
    period VARCHAR,
    position VARCHAR
)
SELECT period FROM table_24565004_15 WHERE position = "Attaquant"
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: List the number of active years for attaquant. ### Input: CREATE TABLE table_24565004_15 (
    period VARCHAR,
    position VARCHAR
) ### Response: SELECT period FROM table_24565004_15 WHERE position = "Attaquant"