user: Question: what is the least tonnage for the ship(s) that entered service on 11 February 1983?
Columns: ["Ship's name", 'Date entered service', 'Date withdrawn', 'Tonnage', 'Type of Ship']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['Oranje Nassau', '27 August 1945', 'July 1954', 3053.0, 'Twin Screw Steamer']
SQL:

assistant: SELECT MIN("Tonnage") FROM "Table" WHERE "Date entered service" = '11 February 1983';