text: Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
  ### Context:
  CREATE TABLE table_name_21 (tackles VARCHAR, yards VARCHAR, fumr VARCHAR, totaltk VARCHAR)
  ### Question:
  what is the total number of tackles when fumr is 0, totaltk is 54 and yards is less than 0?
  ### Answer:
  SELECT COUNT(tackles) FROM table_name_21 WHERE fumr = 0 AND totaltk = 54 AND yards < 0