user: Question: How many rounds were played on May 8?
Columns: ['Round', 'Circuit', 'Location', 'Date', 'Pole position', 'Fastest lap', 'Winning driver', 'Winning team']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Virginia International Raceway', 'Alton, Virginia', 'April 10', 'Daniel Erickson', 'Cole Morgan', 'Victor Carbone', 'Alegra Motorsports']
SQL:

assistant: SELECT COUNT("Round") FROM "Table" WHERE "Date" = 'May 8';