user: ### NOW ANSWER:
Question: with delivery date of 2001 2001 what is gross tonnage?
Columns: ['Type', 'Owns', 'Length', 'Delivery Date', 'Gross Tonnage']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['General cargo ship', 'Yes', '83.5152 m (LBP)', '1 June 1980', 2266.0]
SQL:

assistant: SELECT AVG("Gross Tonnage") FROM "Table" WHERE "Delivery Date" = '2001 2001';