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_name_51 (unit VARCHAR, novelty VARCHAR)
  ### Question:
  What unit has gen et sp nov as the novelty?
  ### Answer:
  SELECT unit FROM table_name_51 WHERE novelty = "gen et sp nov"