what is the least tonnage for the ship(s) that entered service on 11 february 1983?
CREATE TABLE table_name_21 (tonnage INTEGER, date_entered_service VARCHAR)
SELECT MIN(tonnage) FROM table_name_21 WHERE date_entered_service = "11 february 1983"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: 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? [/INST] SELECT MIN(tonnage) FROM table_name_21 WHERE date_entered_service = "11 february 1983" </s>