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_24853015_1 (round VARCHAR, class_d_winner VARCHAR, class_b_winner VARCHAR)
  ### Question:
  In which round did Roy Salvadori won Class D and Alan Hutcheson won Class B?
  ### Answer:
  SELECT round FROM table_24853015_1 WHERE class_d_winner = "Roy Salvadori" AND class_b_winner = "Alan Hutcheson"