user: Question: when was the first performance for the Ballet with Peter Mazurowski in the Final Cast?
Columns: ['Status', 'Name', 'First Performance', 'Last Performance', 'Style']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Original Cast', 'Kiril Kulish', '1 October 2008', '3 October 2009', 'Ballet']
SQL:

assistant: SELECT "First Performance" FROM "Table" WHERE "Style" = 'Ballet' AND "Status" = 'Final Cast' AND "Name" = 'Peter Mazurowski';