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_28652521_1 (singer_part_number VARCHAR, storage_case VARCHAR)
  ### Question:
  What's the singer part number of the buttonholer whose storage case is a green plastic box?
  ### Answer:
  SELECT singer_part_number FROM table_28652521_1 WHERE storage_case = "green plastic box"