Question: What is City / State, when Winner is "Rohan Onslow", and when Circuit is "Oran Park Raceway"?
SQL: SELECT "City / State" FROM "2-17677697-2" WHERE "Winner" = 'Rohan Onslow' AND "Circuit" = 'Oran Park Raceway';

Question: What is Winner, when City / State is "Mallala , South Australia", and when Team is "Elfin Sports Cars"?
SQL: SELECT "Winner" FROM "2-17677697-2" WHERE "City / State" = 'Mallala , South Australia' AND "Team" = 'Elfin Sports Cars';

Question: What is Circuit, when Team is "R.J.Macarthur Onslow", and when City / State is "Sydney , New South Wales"?
SQL: SELECT "Circuit" FROM "2-17677697-2" WHERE "Team" = 'R.J.Macarthur Onslow' AND "City / State" = 'Sydney , New South Wales';

Question: What is Winner, when Team is "R.J.Macarthur Onslow", and when Circuit is "Oran Park Raceway"?
SQL: SELECT "Winner" FROM "2-17677697-2" WHERE "Team" = 'R.J.Macarthur Onslow' AND "Circuit" = 'Oran Park Raceway';

Question: What is Date, when City / State is "Mallala , South Australia", and when Team is "R.J.Macarthur Onslow"?
SQL: SELECT "Date" FROM "2-17677697-2" WHERE "City / State" = 'Mallala , South Australia' AND "Team" = 'R.J.Macarthur Onslow';

Question: What is Winner, when Date is "20 August"?
SQL: SELECT "Winner" FROM "2-17677697-2" WHERE "Date" = '20 August';