What is the average tonnage of the ship named proletarij?
CREATE TABLE table_name_81 (tonnage INTEGER, name_of_ship VARCHAR)
SELECT AVG(tonnage) FROM table_name_81 WHERE name_of_ship = "proletarij"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_81 (tonnage INTEGER, name_of_ship VARCHAR) Question: What is the average tonnage of the ship named proletarij? [/INST] SELECT AVG(tonnage) FROM table_name_81 WHERE name_of_ship = "proletarij" </s>