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_29584601_1 (written_by VARCHAR, no_in_series VARCHAR)
  ### Question:
  How many different pairs of writers wrote the episode with series number 56?
  ### Answer:
  SELECT COUNT(written_by) FROM table_29584601_1 WHERE no_in_series = 56