user: Question: Name the total number of immunity for cycle number of 13
Columns: ['Cycle no.', 'Air dates', 'Reward', 'Immunity', 'Eliminated', 'Vote', 'Finish']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['01', 'September 15 to September 19, 2008', 'Jarakay', 'Jarakay', 'Chev', '8–1', '1st Voted Out Day 3']
SQL:

assistant: SELECT COUNT("Immunity") FROM "Table" WHERE "Cycle no." = '13';