user: Question: Who was the Ottoman Sultan where the treaty at the end of the war was the Treaty of Constantinople (1590)?
Columns: ['Name of the war', 'Ottoman sultan', 'Persian shah', 'Treaty at the end of the war', 'Victor']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Battle of Chaldiran (1514)', 'Selim I', 'Ismail I', 'None', 'The Ottoman Empire']
SQL:

assistant: SELECT "Ottoman sultan" FROM "Table" WHERE "Treaty at the end of the war" = 'Treaty of Constantinople (1590)';