user: Question: In how many rounds was Race 17?
Columns: ['Round', 'Race', 'Circuit', 'Date', 'Pole Position', 'Fastest Lap', 'Winning driver', 'Winning team']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 1.0, 'Wakefield Park', '6 March', 'Mitch Evans', 'Ben Crighton', 'Mitch Evans', 'Team BRM']
SQL:

assistant: SELECT COUNT("Round") FROM "Table" WHERE "Race" = 17.0;