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 Documents (document_name VARCHAR, template_id VARCHAR); CREATE TABLE Templates (template_id VARCHAR, template_type_code VARCHAR)
  ### Question:
  Show all document names using templates with template type code BK.
  ### Answer:
  SELECT T2.document_name FROM Templates AS T1 JOIN Documents AS T2 ON T1.template_id = T2.template_id WHERE T1.template_type_code = "BK"