Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Ship | Tonnage | Builder | Original Operator | Fate |
| --- | --- | --- | --- | --- |
| Friedrich der Grosse | GT | AG Vulcan | NDL | 01922 Sunk after fire, 1922 |
| Barbarossa | GT | Blohm & Voss | NDL | 01924 Scrapped, 1924 |
| Königin Luise | GT | AG Vulcan | NDL | 01935 Scrapped, 1935 |
| Bremen | GT | F. Schichau | NDL | 01929 Scrapped, 1929 |
| König Albert | GT | AG Vulcan | NDL | 01926 Scrapped, 1926 |
| Hamburg | GT | AG Vulcan | HAPAG | 01928 Scrapped, 1928 |
| Prinzess Irene | GT | AG Vulcan | NDL | 01932 Scrapped, 1932 |
| Kiautschou | GT | AG Vulcan | HAPAG | 01934 Scrapped, 1934 |
| Moltke | GT | Blohm & Voss | HAPAG | 01925 Scrapped, 1925 |
| Blücher | GT | Blohm & Voss | HAPAG | 01929 Scrapped, 1929 |
Question:
What is the Tonnage that has builder AG Vulcan, and the original operator NDL, and the ship, Prinzess Irene?
Answer:
GT