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 (project_id VARCHAR, document_type_code VARCHAR)
  ### Question:
  How many documents are with document type code BK for each product id?
  ### Answer:
  SELECT COUNT(*), project_id FROM Documents WHERE document_type_code = "BK" GROUP BY project_id