Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_59613 ( "Ship" text, "Tonnage" text, "Builder" text, "Original Operator" text, "Fate" text )

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

### Accurate SQL ###

SELECT "Tonnage" FROM table_59613 WHERE "Builder" = 'ag vulcan' AND "Original Operator" = 'ndl' AND "Ship" = 'prinzess irene'