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_50 (type VARCHAR, works_number VARCHAR)
  ### Question:
  What is Type, when Works Number is "unknown"?
  ### Answer:
  SELECT type FROM table_name_50 WHERE works_number = "unknown"