user: Question: What is the highest pennant number with ships in Pori class?
Columns: ['Class', 'Ships in class', 'Pennant Number', 'Unit', 'Builder', 'Commissioned']
Types: ['text', 'text', 'real', 'text', 'text', 'text']
Sample row: ['Rauma class', 'Rauma', 70.0, '6th Missile Squadron , Pansio', 'Hollming Oy , Rauma , Finland', '18 October 1990']
SQL:

assistant: SELECT MAX("Pennant Number") FROM "Table" WHERE "Ships in class" = 'Pori';