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 Ref_Detention_Type (detention_type_description VARCHAR, detention_type_code VARCHAR); CREATE TABLE Detention (detention_type_code VARCHAR)
  ### Question:
  What are the code and description of the least frequent detention type ?
  ### Answer:
  SELECT T1.detention_type_code, T2.detention_type_description FROM Detention AS T1 JOIN Ref_Detention_Type AS T2 ON T1.detention_type_code = T2.detention_type_code GROUP BY T1.detention_type_code ORDER BY COUNT(*) LIMIT 1