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_56 (laps INTEGER, grid VARCHAR, time_retired VARCHAR)
  ### Question:
  What is the mean number of laps when the grid is less than 19 and time/retired is +21.3 secs?
  ### Answer:
  SELECT AVG(laps) FROM table_name_56 WHERE grid < 19 AND time_retired = "+21.3 secs"