user: Question: How many dates are there in round 3?
Columns: ['Round', 'Circuit', 'Date', 'Pole Position', 'Fastest Lap', 'Winning Driver', 'Winning Team']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1', 'Hockenheimring', '1 May', 'Bruno Spengler', 'Bruno Spengler', 'Bruno Spengler', 'HWA Team']
SQL:

assistant: SELECT COUNT("Date") FROM "Table" WHERE "Round" = '3';