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_90 (chemical_class VARCHAR, example VARCHAR)
  ### Question:
  Which chemical class uses the example Chloroethane (ethyl chloride)?
  ### Answer:
  SELECT chemical_class FROM table_name_90 WHERE example = "chloroethane (ethyl chloride)"