user: Question: How many entries are there for vote when the air date was 15 November 1997?
Columns: ['Air date', 'Reward', 'Immunity', 'Eliminated', 'Vote', 'Finish']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['13 September 1997', 'North Team', 'North Team', 'Sinisa', '4-2-1-1', '1st Voted Out Day 4']
SQL:

assistant: SELECT COUNT("Vote") FROM "Table" WHERE "Air date" = '15 November 1997';