What is the number of the sail with an overall length of 13.68?
CREATE TABLE table_25595107_2 (
    sail_number VARCHAR,
    loa__metres_ VARCHAR
)
SELECT sail_number FROM table_25595107_2 WHERE loa__metres_ = "13.68"
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 number of the sail with an overall length of 13.68? ### Input: CREATE TABLE table_25595107_2 (
    sail_number VARCHAR,
    loa__metres_ VARCHAR
) ### Response: SELECT sail_number FROM table_25595107_2 WHERE loa__metres_ = "13.68"