user: Question: How many race 3 winners were there when Mitch Evans won race 2?
Columns: ['Event', 'Circuit', 'Date', 'Pole Position', 'Race 1 Winner', 'Race 2 Winner', 'Race 3 Winner']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Albert Park Street Circuit', '28–29 March', 'Nick Percat', 'Nick Percat', 'Nick Percat', 'no third race']
SQL:

assistant: SELECT COUNT("Race 3 Winner") FROM "Table" WHERE "Race 2 Winner" = 'Mitch Evans';