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_73 (tonnage INTEGER, flag VARCHAR)
### Question:
What is the Tonnage of the ship from Canada?
### Answer:
SELECT MAX(tonnage) FROM table_name_73 WHERE flag = "canada"