user: Question: WHAT IS THE WINNER WITH ATCC Round 6?
Columns: ['Date', 'Series', 'Circuit', 'City / State', 'Winner', 'Team']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['27 Jan', 'ATCC Round 1', 'Eastern Creek Raceway', 'Sydney , New South Wales', 'Craig Lowndes', 'Holden Racing Team']
SQL:

assistant: SELECT "Winner" FROM "Table" WHERE "Series" = 'ATCC Round 6';