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_19 (area_of_operation VARCHAR, services VARCHAR, years_of_operation VARCHAR)
  ### Question:
  Where is the area of operation that had drilling during the year 1999?
  ### Answer:
  SELECT area_of_operation FROM table_name_19 WHERE services = "drilling" AND years_of_operation = "1999"