user: Question: How many rounds have a Surface of wintry asphalt?
Columns: ['Round', 'Dates', 'Rally Name', 'Rally HQ', 'Support Category', 'Surface']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, '30 January – 1 February', 'Rally Ireland', 'Sligo', 'JWRC', 'Wintry asphalt']
SQL:

assistant: SELECT COUNT("Round") FROM "Table" WHERE "Surface" = 'wintry asphalt';