CREATE TABLE table_name_97 (tonnage INT, nationality VARCHAR, name_of_ship VARCHAR)

What was the average tonnage for the Siljan ship from Sweden?
SELECT AVG(tonnage) FROM table_name_97 WHERE nationality = "sweden" AND name_of_ship = "siljan"
SELECT AVG("tonnage") FROM "table_name_97" WHERE "name_of_ship" = "siljan" AND "nationality" = "sweden"