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_21164557_1 (original_air_date VARCHAR, production_code VARCHAR)
  ### Question:
  How many original air dates were there for episodes with a production code of 4398016?
  ### Answer:
  SELECT COUNT(original_air_date) FROM table_21164557_1 WHERE production_code = 4398016