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_21 (tonnage INTEGER, date_entered_service VARCHAR)
  ### Question:
  what is the least tonnage for the ship(s) that entered service on 11 february 1983?
  ### Answer:
  SELECT MIN(tonnage) FROM table_name_21 WHERE date_entered_service = "11 february 1983"