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_28 (gene VARCHAR, subject_number VARCHAR)
  ### Question:
  Which gene has the subject number 21?
  ### Answer:
  SELECT gene FROM table_name_28 WHERE subject_number = "21"