what is the tonnage grt of the ship author?
CREATE TABLE table_name_40 (
    tonnage_grt VARCHAR,
    ship VARCHAR
)
SELECT tonnage_grt FROM table_name_40 WHERE ship = "author"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: what is the tonnage grt of the ship author? ### Input: CREATE TABLE table_name_40 (
    tonnage_grt VARCHAR,
    ship VARCHAR
) ### Response: SELECT tonnage_grt FROM table_name_40 WHERE ship = "author"