user: Question: Which round did Jonathan Bomarito win?
Columns: ['Round', 'Race Name', 'Pole position', 'Winning driver', 'Winning Team']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, '2006 Imperial Capital Bank Atlantic Race', 'Andreas Wirth', 'Andreas Wirth', 'Forsythe Championship Racing']
SQL:

assistant: SELECT "Round" FROM "Table" WHERE "Winning driver" = 'Jonathan Bomarito';