Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is the Tonnage that has builder AG Vulcan, and the original operator NDL, and the ship, Prinzess Irene?

### Inputs:
table_name: table, columns: ['Ship', 'Tonnage', 'Builder', 'Original Operator', 'Fate']

### Response:
SELECT Tonnage FROM table WHERE Builder = ag vulcan AND Original Operator = ndl AND Ship = prinzess irene