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_2414_1 (reference VARCHAR, violas VARCHAR, author VARCHAR)
  ### Question:
  What reference, written by Nelson Riddle, suggests 2 violas?
  ### Answer:
  SELECT reference FROM table_2414_1 WHERE violas = 2 AND author = "Nelson Riddle"