How many tackle assists for the player who averages 23.7?
CREATE TABLE table_18064020_21 (
    ast VARCHAR,
    avg VARCHAR
)
SELECT ast FROM table_18064020_21 WHERE avg = "23.7"
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: How many tackle assists for the player who averages 23.7? ### Input: CREATE TABLE table_18064020_21 (
    ast VARCHAR,
    avg VARCHAR
) ### Response: SELECT ast FROM table_18064020_21 WHERE avg = "23.7"