Table: touring_car_1991
Columns: date
series
circuit
city_state
winner
team

Question: Who is the Winner of the Nissan Motorsport Australia Team at the Oran Park Raceway?
SQL: SELECT "winner" FROM touring_car_1991 WHERE "team" = 'nissan motorsport australia' AND "circuit" = 'oran park raceway'

Question: What is the Circuit in the ATCC Round 1 Series with Winner Jim Richards?
SQL: SELECT "circuit" FROM touring_car_1991 WHERE "winner" = 'jim richards' AND "series" = 'atcc round 1'

Question: What is the Team of Winner Mark Skaife in ATCC Round 7?
SQL: SELECT "team" FROM touring_car_1991 WHERE "winner" = 'mark skaife' AND "series" = 'atcc round 7'