user: Question: Who is the Winner of the Nissan Motorsport Australia Team at the Oran Park Raceway?
Columns: ['Date', 'Series', 'Circuit', 'City / State', 'Winner', 'Team']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['24 Feb', 'ATCC Round 1', 'Sandown International Raceway', 'Melbourne , Victoria', 'Jim Richards', 'Nissan Motorsport Australia']
SQL:

assistant: SELECT "Winner" FROM "Table" WHERE "Team" = 'Nissan Motorsport Australia' AND "Circuit" = 'Oran Park Raceway';