what is the total number of tackles when fumr is 0, totaltk is 54 and yards is less than 0?
CREATE TABLE table_name_21 (
    tackles VARCHAR,
    yards VARCHAR,
    fumr VARCHAR,
    totaltk VARCHAR
)
SELECT COUNT(tackles) FROM table_name_21 WHERE fumr = 0 AND totaltk = 54 AND yards < 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 total number of tackles when fumr is 0, totaltk is 54 and yards is less than 0? ### Input: CREATE TABLE table_name_21 (
    tackles VARCHAR,
    yards VARCHAR,
    fumr VARCHAR,
    totaltk VARCHAR
) ### Response: SELECT COUNT(tackles) FROM table_name_21 WHERE fumr = 0 AND totaltk = 54 AND yards < 0