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_50 (diameter__km_ INTEGER, latitude VARCHAR, year_named VARCHAR, longitude VARCHAR)
  ### Question:
  What is the diameter for 1997 when longitude is 212.0e and latitude is 47.0n?
  ### Answer:
  SELECT MIN(diameter__km_) FROM table_name_50 WHERE year_named = 1997 AND longitude = "212.0e" AND latitude = "47.0n"