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_13 (tonnage INTEGER, nationality VARCHAR, ship VARCHAR)
### Question:
What is the highest tonnage for a ship from Great Britain named Newton Ash?
### Answer:
SELECT MAX(tonnage) FROM table_name_13 WHERE nationality = "great britain" AND ship = "newton ash"